powersoft Ottocanali 4K4User Guide v 1.6March 2013Ottocanali 12K4, Ottocanali 4K4, Ottocanali 12K4 User Manual

powersoft _ottocanali_4k4_8k4_12k4_uguide_en_v1.6
© 2013 Powersof t

Powersoft • Via Enrico Conti, 5 • 50018 Scandicci (FI) • Italy

[phone] • [e-mail] • www.powersoft-audio.com

DO000140

Ottocanali 4K4

User Guide v 1.6

March 2013

Ottocanali

12K4

Ottocanali 8K4

Ottocanali 12K4

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2

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powersoft _ottocanali_4k4_ 8k4_12k4_uguide_en_v1.6
© 2013 Powersof t

Powersoft • Via Enrico Conti, 5 • 50018 Scandicci (FI) • Italy

[phone] • [e-mail] • www.powersoft-audio.com

Ottocanali 4K4/8K4/12K4

User Guide

1 Warnings. ........................................5

1.1 Impor tant Safety Instructions . ......................5

1.2 Warning Notices . .................................5

1.2 .1 Locati on. ....................................5

1.2.2 Precautions Regarding Installation...............5

1.3 Safety Rules . .....................................6

1.4 Speaker Damage . .................................6

1.5 Speaker Output Shock Hazard . ....................6

2 Front and Rear Panel Reference Figures. ...............7

3 Welcome. ........................................9

3.1 Introduction . .....................................9

3.2 The Ot tocanali Series . ............................9

3.3 More Sound and Less Weight . .....................9

4 Installation........................................9

4.1 Unpacking ........................................9

4.2 Mounting . ......................................10

4.3 Cooling . ........................................10

4.4 Operating Precautions ............................10

4.5 Grounding . .....................................10

4.6 AC Mains Connection . ...........................10

5 Connections and Operation. .......................11

5.1 Introduction .....................................11

5.2 Front Panel Controls Access .......................11

5.3 Front Panel Adjustments . .........................11

5.3.1 Output Level Adjustments. ...................11

5.3.2 Energy Save. ................................12

5.4 Front Panel Monitoring . ..........................12

5.5 Connecting Audio Inputs . ........................13

5.6 Connecting Audio Outputs . ......................13

5.7 Hi-Z 70V/100V Operations . ......................14

5.7.1 Rear panel DIP switches. .....................14

5.8 Bridge Mode Connection . ........................14

5.9 GPIO Operations . ...............................14

5.9.1 A larms ......................................14

5.9.2 Remote ON/OFF. . . . . . . . . . . . . . . . . . . . . . . . . . . .16

6 Protection.......................................16

6.1 Turn On/Turn Off Muting . ........................16

6.2 Shor t Circuit Protection . .........................16

6.3 Thermal Protection . .............................16

6.3.1 Thermal Warning. ...........................16

6.3.2 Thermal Shutdown. .........................16

6.4 DC Fault Protection . .............................16

6.5 Input/Output Protection . .........................16

7 User Maintenance.................................16

7.1 Cleaning . .......................................16

7.2 Service . ........................................17

7.3 Dust Removal . ..................................17

8 Warranty........................................17

9 Assistance. ......................................17

10 Technical specication. ............................18

10.1 Ottocanali 4K4 . .................................18

10.2 Ottocanali 8K4 . .................................19

10.3 Ottocanali 8K4 DSP+AVB. ........................20

10.4 Ottocanali 12K4 . ................................21

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powersoft _ottocanali_4k4_ 8k4_12k4_uguide_en_v1.6
© 2013 Powersof t

Powersoft • Via Enrico Conti, 5 • 50018 Scandicci (FI) • Italy

[phone] • [e-mail] • www.powersoft-audio.com

Ottocanali 4K4/8K4/12K4

User Guide

1 Warnings

1.1 Important Safety Instructions

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

!

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO
NOT ATTEMPT TO OPEN ANY PART OF THE UNIT . NO
USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.

“WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK , DO NOT EXPOSE THIS APPARATUS TO RAIN
OR MOISTURE. OBJECTS FILLED WITH LIQUIDS, SUCH AS
VASES, SHOULD NOT BE PLACED ON THIS APPARATUS”

“TO COMPLETELY DISCONNECT THIS APPARATUS FROM
THE AC MAINS, DISCONNECT THE POWER SUPPLY CORD
PLUG FROM THE AC RECEPTACLE”

“THE MAINS PLUG OF THE POWER SUPPLY CORD MUST
REMAIN READILY ACCESSIBLE”

SAFEGUARDS: Electrical energy can perform many useful
functions. This unit has been engineered and manufactured to
assure your personal safety. Improper use can result in potential

electrical shock or re hazards. In order not to defeat the

safeguards, obser ve the following instructions for its installation,
use and servicing.

▶

Read these instructions.

▶

Keep these instructions.

▶

Heed all warnings.

▶

Follow all instructions.

▶

Do not use this amplier near water.

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Clean only with a dry cloth.

▶

Do not block any ventilation openings.

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Install in accordance with the manufacturer’s instructions.

▶

Do not install near any heat sources such as radiators, heat

registers, stoves, or other apparatus (including ampliers)

that produce heat.

▶

Do not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades with
one wider than the other. A grounding type plug has two
blades and a third grounding prong. The wide blade or the
third prong are provided for your safety. If the provided

plug does not t into your outlet, consult an electrician for

replacement of the obsolete outlet.

▶

Protect the power cord from being walked on or pinched
particularly at plugs, convenience receptacles, and the point
where they exit from the apparatus.

▶

Only use attachments/accessories specied by the

manufacturer.

▶

Unplug this amplier during lightning storms or when unused
for long periods of time. Refer all servicing to qualied ser vice
personnel. Servicing is required when the amplier has been

damaged in any way. For example if the power-supply cord
or plug have been damaged, if liquid has been spilled or

objects have fallen into the amplier, if the amplier has been

exposed to rain or moisture, if it has been dropped or if it
does not operate normally.

EXPLANATIONS OF GRAPHICAL SYMBOLS:

“The Lightning Flash with arrowhead symbol within an equilateral
triangle is intended to aler t the user to the presence of uninsulated
“dangerous voltage” within the product enclosure that may be of

sufcient magnitude to constitute a risk of shock to persons”.

!

“The exclamation point within an equilateral triangle is intended
to aler t the user to the presence of important operating and

maintenance (servicing) instructions in the literature accompanying

the product”.

1.2 Warning Notices

!

1.2 .1 Location

Install the amplier in a well-ventilated location where it will not

be exposed to high temperature or humidity.

Do not install the amplier in a location that is exposed to direct

sun rays, or near hot appliances or radiators. Excessive heat can
adversely affect the cabinet and internal components. Installation

of the amplier in a damp or dusty environment may result in

malfunction or accident.

1.2.2 Precautions Regarding Installation

Placing and using the amplier for long periods of time on heat

generating sources will affect its performance. Avoid placing the

amplier on heat generating sources. Install this amplier as far as
possible from tuners and T V sets. An amplier installed in close

proximity of such equipment may experience noise or generic
performance degradation.

WARNING. To prevent re or electric shock:

▶

The ventilation openings must not be impeded by any item
such as newspapers, tablecloths, curtains etc; keep a distance
of at least 50cm from the front and rear ventilation openings

of the amplier.

▶

Do not expose this amplier to rain or moisture.

▶

This equipment must not be exposed to dripping or splashing

liquids: objects lled with liquids, such as vases, must not be
placed on the amplier.

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6

Ottocanali 4K4/8K4/12K4 User Guide

1.3 Safety Rules

!

▶

This device must be powered exclusively by earth connected
mains sockets in electrical networks compliant to the IEC 364
or similar rules.

▶

It is absolutely necessary to verify this fundamental
requirement of safety and, in case of doubt, require an

accurate check by qualied personnel.

▶

The manufacturer cannot be held responsible for damages
caused to persons, things or data due to an improper or
missing ground connection.

▶

Before powering this amplier, verify that the correct voltage

rating is being used.

▶

Verify that your mains connection is capable of satisfying the
power ratings of the device.

▶

Do not spill water or other liquids into or on the amplier.

▶

Do not use this ampliler if the electrical power cord is frayed

or broken.

▶

Do not remove the cover. Failing to do so will expose you to
potentially dangerous voltage.

▶

No naked ame sources such as lighted candles should be
placed on the amplier.

▶

Provide a sectioning breaker between the mains connections
and the amplier. The suggested device is a 16A/250V AC, C
or D curve, 10K A.

▶

Contact the authorized service center for ordinary and
extraordinary maintenance.

1.4 Speaker Damage

!

Powersof t Class D ampliers are among the most power ful
professional ampliers available and are capable of producing

much more power than many loudspeakers can handle. It is the

user’s responsibility to use speakers suitable to the amplier and

to use them in a sensible way that will not cause damage.

Powersof t will not be held responsible for damaged speakers.
Consult the speaker manufacturer for power handling
recommendations.

Even if you reduce the gain using the amplier’s front panel

attenuation controls, it is still possible to reach full output power if
the input signal level is high enough.

A single high-power tone can damage high frequency drivers
almost instantaneously, while low frequency drivers can usually
withstand very high, continuous power levels for a few seconds
before they fail. Reduce power immediately if you hear any
speaker “bottoming out” - harsh pops or cracking distor tion that
indicate that the speaker voice coil or diaphragm is striking the
magnet assembly.

Powersof t recommends that you use ampliers of this power
range for more headroom (cleaner sound) rather than for

increased volume.

1.5 Speaker Output Shock Hazard

A Class D amplier is capable of producing hazardous output

voltages. To avoid electrical shock, do not touch any exposed

speaker wiring while the amplier is operating.

This manual contains important information on operating your
Powersoft amplier correctly and safely. Please read it carefully
before operating your amplier. If you have any questions,
contact your Powersoft dealer.

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Ottocanali 1204 User Guide

2 Front and Rear Panel Reference Figures

REF. FIGURE 1: Front panel view with closed side panels

Ottocanali

8K4

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8

Ottocanali 4K4/8K4/12K4 User Guide

REF. FIGURE 2: Front panel view with opened side panels

REF. FIGURE 3: Back panel view

Energy save switch (per channel pair)

Preset selection switches (DSP version only)

DSP LEDs (DSP version only)

24V DC back panel PWS OUT voltage
source enable pushbutton switch

Output attenuators

(Ch1-Ch8)

Multifunction LEDs (Ch1-Ch8)

Air vents

On/OFF switch

AC mains power plug

70V/100V options

DIP switches

Audio outputs Line inputs

(Channels 1 to 4)

Line inputs

(Channels 5 to 8)

AUX inputs

(Channels 5 to 8)

AUX inputs

(Channels 1 to 4)

Alarm outputs

(Channels 1 to 4)

Alarm outputs

(Channels 5 to 8)

AUX input selection

Remote
ON/OFF
switch

Remote AUX supply

(DSP version only)

24V DC output enabled by

front panel switch

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9

Ottocanali 4K4/8K4/12K4 User Guide

3 Welcome

3.1 Introduction

Congratulations on buying a Powersoft Ottocanali amplier!
Powersof t is a leading company in the eld of high efciency

audio power management. The Powersof t Class D technology
has changed the way the world looks at professional audio

amplication: no other amplier’s performance comes close for

applications demanding high power and long term reliability.
Thanks to amazing reductions in heat output and weight, without

sacricing output powers, Powersoft ampliers can be used in an

unlimited range of PA applications such as opera houses, theaters,
churches, cinema, and theme parks.

3.2 The Ottocanali Series

The Ottocanali series of ampliers are specically designed for
installation applications. The ampliers in this series offer smaller

dimensions, lighter weight and the traditionally amazing sound
quality and reliability of all Powersoft products. The PFC (Power

Factor Correction) feature allows awless worldwide operation

with any AC mains voltage, including 100, 110, 115, 220, 230 and
240V.

More Sound and Less Weight Class D technology based

ampliers are highly efcient, delivering greater power to speakers
with reduced heat dissipation: typical running efciency of output

stages is 95%, with only 5% of input energy dissipated as heat. This
allows for smaller dimensions, weight and power consumptions.

Contrary to conventional ampliers which achieve highest
efciency only at full rated power output, Class D efciency is

almost independent of output level. Music has an average power

density of 40% of its peak value; this means that other (non-class D)
ampliers can easily generate 10 times more heat than Powersof t

products for the same sound pressure level. This unit is designed
to work with lo-Z (from 2 Ω) and with 70V/100V distrib uted lines.

Powersof t ampliers deliver crystal-clear highs, and a tight, well­dened low end: the most accurate reproduction of an audio

signal. Solid time proven design features ensure ex tremely high
performance in terms of super low total harmonic distortion,
optimal frequency response, high power bandwidth and damping
factor across a vast number of application scenarios. Powersoft’s

multi patented application of Pulse Width Modulation (PWM)

high frequency sampling techniques is just one of the many factors
contributing to the Ottocanali’s high performance ratings across
the audio bandwidth.

Patented SRM (Smart Rails Management) technology allows
to maximize the efciency of the system and drastically reduce

power consumption at any load and usage condition. This system
automatically alters the rails working level according to the
instaneous power requirements of the system. Low power output
requires a lower rails voltage value which in turn yields lower
power consumption while at the same time guaranteeing lightning
fast switching to full rails voltage when the system requires full
power. This Powersoft exclusive technology is the key to the

incredibly low power consumtption of the Ottocanali ampliers.

The Show Always Goes On

The Ottocanali series offer s complete protection against any

possible operation error. Every amplier in this series is designed

to work under a large range of possible conditions, delivering
maximum power with maximum safety and an outstanding long
term reliability. Two universal switch mode power supplies with

PFC (Power Factor Correction) each independently powering a

set of 4 channels. Anticipating potential problems at the design

stage means your show always goes on!

4 Installation

4.1 Unpacking

Carefully open the shipping car ton and check for any noticeable

damage; the gure below (FIGURE 1) shows the packing view.
Every Powersoft amplier is completely tested and inspected

before leaving the factory and should arrive in pristine condition.
In the unlikely event that you should encounter any damage,
please notify the shipping company immediately. Be sure to save
all packing materials for the carrier’s inspection.

The Ottocanali box contains the following:

▶

1 Ottocanali amplier

▶

1 x AC Mains cord with 3-pin plug 20 A for US, IEC ‘Schuko’
16 A for every other nation.

▶

2 x 8 pin DFK-PC 4/8-G-7.62 1861219

▶

6 x 12 pin Phoenix MC 1.5/12-ST-3.81 1803675 connectors

▶

2 x 4 pin Phoenix MC 1.5/4-ST-3.81 1803594 connectors

▶

1 x 16 pin Phoenix MSTB 2.5/16-ST-5.08 1757158 connectors

FIGURE 1: Ottocanali box

4.2 Mounting

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10

Ottocanali 4K4/8K4/12K4 User Guide

All Powersof t ampliers are designed for standard 19” rack

mounting; there are four front panel holes and two rear-lateral

holes. In order to limit the risk of mechanical damages, ampliers
must be xed to the rack using both frontal as well as rear
mounting holes (FIGURE 2).

FIGURE 2: Amplier rack mounting holes, front and back

4.3 Cooling

All Powersoft ampliers implement a forced-air cooling system to

maintain low and constant operating temperatures. Drawn by an
internal fan, air enters through the slots in the front panel and is

forced over all components, exiting at the back of the amplier.

The amplier’s cooling system features an “intelligent” variable-

speed DC fan which is controlled by heat sink temperature sensing
circuits: the fan speed will increase only when the temperature
recorded by the sensors rises over carefully predetermined values.
This ensures that fan noise and internal dust accumulation are kept

to a strict minimum. Should however the amplier be subject to

an extreme thermal load, the fan will force a very large volume
of air through the heat sink. In the ex tremely rare event that the

amplier should dangerously overheat, sensing circuits shut down
all channels until the amplier cools down to a safe operating

temperature. Normal operation is resumed automatically without
the need for user intervention.

When mounting Ottocanali ampliers, the exhaust heat should

be taken into consideration. Exhaust cooling air is forced out
through the rear of the chassis (FIGURE 3); make sure there

is enough space around the back of the amplier for this air to
escape. Ottocanali ampliers can be stacked one on top of the
other due to the efcient cooling system they are equipped with.

There is however a safety limit to be obser ved: in case a rack with
closed back panels is used, leave one rack unit empty ever y four

Ottocanali ampliers installed to guarantee adequate air ow.

FIGURE 3: Forced air cooling: front to back airow

4.4 Operating Precautions

Make sure the power switch is off before attempting to make any
input or output connections.

Make sure the AC mains voltage used is within the acceptable

operating voltage range specied in the Ottocanali documentation
(100V-240V ±10%). Damage caused by connecting the amplier

to an improper AC mains voltage is not covered by the warranty.

By using good quality input and speaker cables, the likelihood of
erratic signal behavior is reduced to a minimum. Whether you
make them or buy them, look for good quality wires, connectors
and soldering techniques.

4.5 Grounding

There is no ground switch or terminal on the Ottocanali Series

ampliers. All shield terminals of input connections are directly

connec ted to the chassis. This means that the unit’s signal grounding
system is automatic. In order to limit hum and/or interference
entering the signal path, use balanced input connections.

In the interests of safety, the unit MUST always operate with
electrical safety ear th connected to the chassis via the dedicated
wire in the 3-wire cable. Never disconnect the ground pin on the
AC mains power cord.

4.6 AC Mains Connection

The AC Mains connection is made via the IEC type connector on

the back of the amplier. The PFC feature allows the Ottocanali

to work within a range of different AC mains voltages without the
need to adjust any settings; however, make sure your AC mains
power source operates within the voltage limits indicated on this

manual (100V-240V ±10%). Two 15A 6,3x32mm mains fuses are
located directly on the amplier boards.

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11

Ottocanali 4K4/8K4/12K4 User Guide

FIGURE 4: Mains connector and on/off switch

SAFETY WARNING! Ground wires must be connected! Do not

use adapters that disable grounding.

5 Connections and Operation

5.1 Introduction

This section provides information on amplier connection and
operation. For optimal amplier performance, it is important to

understand the meaning of the information that the Ottocanali

amplier can provide regarding its status and conguration.

This information is available to the user both via front panel

indicators as well as through specic alarm signals broadcasted

from dedicated connectors on the back of the unit. This chapter
will break down all the front panel operations and monitoring
functions the Ottocanali is capable of. The remaining par t of

the chapter will explain how to correctly connect the amplier’s

inputs and outputs.

5.2 Front Panel Controls Access

A number of impor tant controls can be accessed by removing
the front left hand side protective panel bearing the Powersof t
logo. Both silver colored metal panels are at tached to the chassis
magnetically and can therefore be removed quickly without the

aid of any specic tool.

The following procedure can be used to remove both the left as
well as the right hand front panels. Removing the right hand panel,
however, does not grant access to any controls and is useful only

for air lter access (see Section 7. 3).

To remove the left hand side front panel bearing the Powersof t
logo:

1. Firmly grip the outermost lef t hand side of the silver colored
panel and pull outwards at an angle, as if opening a door
hinged on the right hand side

2. Carefully slide the metal panel away from the chassis. When

the front panel is removed, the air lter (looking like a shiny
black plastic sponge) will be exposed.

FIGURE 5: Magnetic side panel removal

To reposition the left hand side silver panel:

1. Secure the air lter to the amplier chassis by placing it in its

designated area and press lightly, so that the lter’s central cut

hole can brace the magnetic snap mechanism

2. Align the silver panel’s right hand side to the chassis at the
same angle used to remove it

3. When correctly positioned, the magnetic snap mechanism
will automatically secure the metal panel in place.

The controls positioned behind the left hand side silver colored
Powersof t logo panel allow access to a series of important features:

▶

Output channel attenuation adjustment (see Section 5.3.1)

▶

AUX Input/Line Input toggle (see Section “5.5 Connecting

Audio Inputs”)

▶

GPIO operations (see Section 5.9)

▶

Channel pair energy save mode selection (see Section 5.3.2)

5.3 Front Panel Adjustments

There are two types of adjustments that are possible from the
Ottocanali front panel: output level attenuation and energy save
mode.

5.3.1 Output Level Adjustments

Removing the lef t hand side metallic panel exposes one attenuator
knob for each channel, numbered one through eight starting from
the left hand side. Each channel’s output attenuation level can
be set to any value from 0 to ∞. Attenuation level decreases by
rotating the blue knob clock wise.

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12

Ottocanali 4K4/8K4/12K4 User Guide

FIGURE 6: Front panel left hand side output attenuators

5.3.2 Energy Save

Energy save capabilities can be activated for each channel pair.
When the energy save mode is activated on a channel pair, the
Ottocanali enters a low power consumption idle state when
no signal activity is detected for more than 4 seconds. Normal
operation is resumed in a mat ter of milliseconds when an incoming
signal is detected on the channel pair.

Idle Power Consumption Energy Save Mode OFF

AC Mains

Voltage ( V)

Current (A) Real Power

(W)

Apparent

Power (VA)

Power
Factor

115 0.90 52 103. 5 0.5

230 0.84 58 193 0.3

Idle Power Consumption Energy Save Mode ON

AC Mains

Voltage ( V)

Current (A) Real Power

(W)

Apparent

Power (VA)

Power
Factor

115 0.65 30 75 0.4

230 0.76 35 175 0.2

FIGURE 7: Energy save mode on/off: idle power consumption chart for
the Ottocanali 4K4, 8K4,12K4

In order to enable energy saving mode for a channel pair, the DIP
switch on the left hand side of the front panel must be set to OFF

(down). The rst switch to the left is relative to channels 1 and 2,

the second to channels 3 and 4 and so on.

FIGURE 8: DIP switch for energy save mode

5.4 Front Panel Monitoring

The Ottocanali front panel provides important information on the

state of the amplier. It is important to know and understand the

meaning of every front panel indicator in order to have crucial

information on the operational state of the amplier.

On the central portion of the front panel of the Ottocanali are 8
columns of 7 LEDs each, one column for each channel.

FIGURE 9: Front panel LEDs

Some of these LEDs have multiple signaling modes, e.g. metering
or alarm modes. Their function is summarized in the following
chart:

LED Color Solid ON Blinking

Red Channel output level has

reached clipping limits

OR

Channel has been muted

due to heat sink temperature

rising above 80°C

1)

Yellow Channel output level is

above -6dB of max output

level

OR

Thermal warning: heat sink

temperature is above 70°C

2)

Green Channel output level is

above -12dB of max output

level

Green Channel output level is

above -24dB of max output

level

Green Input signal presence:

Input signal is above -60dBV

Green Channel is ready

Green -- AUX inputs

are selected

1)

Even if only one channel causes thermal overload, all channels are muted

and all red LEDs are on.

2)

Even if only one channel causes thermal warning, all yellow LEDs are on.

FIGURE 10: Front panel LEDs chart

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13

Ottocanali 4K4/8K4/12K4 User Guide

5.5 Connecting Audio Inputs

Audio input connections are made via two 12-pin Phoenix MC

1.5/12-ST-3.81 terminal block connectors:

FIGURE 11: Audio input terminal block connector

Input connectors are placed on the back of the Ottocanali and
grouped in four rows:

FIGURE 12: Rows of input connectors

▶

The rst row is for line inputs for channels 1 through 4

▶

The second row of connectors is for auxiliary inputs for
channels 1 through 4

▶

The third row is for line inputs for channels 5 through 8

▶

The four th row of connectors is for auxiliary inputs for
channels 5 through 8

Line Input/Aux Input toggle:

The amplier switches from line inputs to auxiliary inputs when a

constant voltage in the 12V to 30V range is applied to the “AUX
SEL” connector. When this voltage is removed from the “AUX
SEL” connector, the unit switches back from auxiliary inputs to
line inputs.

FIGURE 13: AUX SEL connector

The Ottocanali amplier provides an additional procedure to

switch from line inputs to auxiliary inputs. The “PWS OUT”
connector can provide a 24V DC (0.2 A max, symmetrical with

respect to ground) when enabled by the left hand front panel

toggle switch.

FIGURE 14: AUX SEL and PWS OUT connection

FIGURE 15: Front panel “PWS OUT” toggle switch

FIGURE 16: PWS OUT port on the back of the Ottocanali amp

By connecting the “PWS OUT” connector to the “AUX SEL”
(see F IGU R E 13) the front panel switch will toggle between line
inputs and auxiliary inputs. The following diagram explains the
relationship between the front panel toggle switch and the PWS
OUT port.

FIGURE 17: PWS OUT por t vs front panel switch diagram

5.6 Connecting Audio Outputs

Warning! Lethal voltage levels may be present at the loudspeaker
connectors when the amp is turned on!

Two 8 pin DFK-PC 4/8-G -7.62 1861219 terminal block connectors

are provided for the amplier’s output connections. The + pin of

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14

Ottocanali 4K4/8K4/12K4 User Guide

the connector corresponds to the positive output of the channel.
Ensure that the speakers are connected to the Ottocanali output
with the correct polarity.

FIGURE 18: Audio output terminal block connector

Both bridge as well as single end output connection modes are
possible and can be mixed: for example, channels 1 and 2 can
be connected in bridge mode, while channels 3 and 4 can be
connected single end.

REF. FIGURE 5 summarizes common connection modes with

corresponding connection polarities. Speaker cables are labeled
as spk X _+ and spkX _-, where X represents the speaker number.

5.7 Hi-Z 70V/100V Operations

Any channel of the Ottocanali amplier can drive a 70V/100V (hi­Z) line. In order to connect any channel’s output to a 70V/100V

line, the rear panel DIP switch corresponding to the channel
must be correctly set. Powersoft recommends using a HPF

(High Pass Filter) when the amplier is set to drive a distributed

line to prevent loudspeaker transformer saturation which can
considerably degrade sound performance. Please see Section 5 .7.1

for a detailed explanation of the channel specic options that can

be set via the DIP switches.

5.7.1 Rear panel DIP switches

The rear of the Ottocanali has 4 slide-style DIP switches for
each channel, yielindg a total of 32 switches. These DIP switches

allow the selection of channel specic parameters which must be
properly set when using the amplier to drive, for example, a 70

V/100 V distributed line.

The rst switch form the left hand side allows to select whether

the channel will drive a 70 V or 100V line.

The second switch from the lef t allows to select the lo-Z or hi-Z

mode of the amplier. If the amplier is set to work in lo-Z mode,

the settings of all the other three DIP switches are ignored.

The third switch from the left allows to select the cut off frequency

of the input high pass lter. The two options are 35 Hz or 70 Hz.

The last switch allows to turn on or turn off the aforementioned

high pass lter. If the HPF is set to off, the 35Hz/70Hz setting is

ignored.

FIGURE 19: DIP switches for 70V/100V modes position

DIP switches for

Channel 2

DIP switches for

Channel 1

FIGURE 20: Rear panel DIP switch detail for channels one and two

5.8 Bridge Mode Connection

Bridge mode connection of outputs is possible only in lo-Z
operational mode. Bridging of adjacent channels is allowed for the
following pairs: channels 1 with 2, 3 with 4, 5 with 6, 7 with 8.
Bridiging is NOT possible for other pairs, for example channels
4 and 5. In order to obtain a bridge connection of the outputs,
inputs must be connected in parallel and outputs in series on
a minimum load of 8 Ω . Please refer to REF. FIGURE 4 for a
connection diagram example.

5.9 GPIO Operations

General Purpose Input/Output Operation (GPIO) refers to a
generic two pin contact (balanced or unbalanced) that can control

or can be controlled by another system. The Ottocanali’s GPIO
system implements digital trigger signals to broadcast alarms or
allow remote unit on/off switching.

5.9.1 Alarms

To ensure problem-free and efcient interaction with external

devices, the Ottocanali provides two 12-pin Phoenix MC 1.5/12­ST-3.81 connectors on the back panel.

FIGURE 21: Back panel alarm output connectors

▶

15

Ottocanali 4K4/8K4/12K4 User Guide

REF. FIGURE 4: Bridge mode output connection of channel 1 and channel 2, lo-Z only

Output

CH8-

Spk8_-

Spk4_ -

Output

CH8 +

Spk 8_+

NC

Output

CH7-

Sp k7_ -

NC

Output

CH7 +

Sp k7_+

Spk 4_+

Output

CH 6 -

Spk6_-

Spk3_-

Output

CH6 +

Spk 6_+

NC

Output

CH5-

Spk5_-

NC

Output

CH5 +

Spk 5_+

Spk 3_+

Output

CH4 -

Spk4_ -

Spk2_-

Output CH

4 +

Spk 4_+

NC

Output

CH3-

Spk3_-

NC

Output

CH3 +

Spk 3_+

Spk 2_+

Output

CH2-

Spk2_-

Spk1_ -

Output

CH2 +

Spk 2_+

NC

Output

CH1-

Spk1_ -

NC

Output

CH1 +

Spk1 _+

Spk1 _+

Connection type

Singl e end

Lo-Z 70V/100V

Bri dge Lo-Z

REF. FIGURE 5: Output connection mode char t

▶

16

Ottocanali 4K4/8K4/12K4 User Guide

These contacts are used to repor t potentially dangerous faults or
generally unsafe operation conditions by toggling alarm switches
relative to events such as:

▶

DC presence at the output: when a dangerous DC component
is present in the output power signal

▶

Thermal stress: when heat dissipation is not sufcient and

heat sink temperature rises.

For a detailed account of protective measures relative to these
alarms, please see Chapter 6.

5.9. 2 Remote ON/OFF

By applying 24V DC (range from 15V to 30V DC) to the “REM

OFF” connector located at the back of the Ottocanali, the

amplier can be remotely switched on and off. When a 24V DC

voltage is applied to the REM OFF 2-pin Phoenix MC 1.5/4-ST-

3.81 connector, the amplier switches off immediately. When the
24V DC voltage is removed, the amplier switches back on as per

normal boot up operation.

FIGURE 22: REM OFF connector

6 Protection

In order to protect your device and your speakers from accidental

damage, the Ottocanali amplier includes an extensive automatic

protection system. In the following sections, potentially dangerous

scenarios and the amplier’s corresponding protective response

are explained in detail.

6.1 Turn On/Turn Off Muting

Class D amplier may cause severe speaker damage at power up

due to the high voltage levels at the output stage. In order to avoid
this, the outputs are muted for less than 2 seconds after turn on.

Similarly, turning off the amplier can cause the same problem:

outputs are muted immediately at turn off.

6.2 Short Circuit Protection

Shor t circuits or very low impedance loads may destroy the

output stage of any amplier. In order to protect the amplier

from the dangerously high current surges arising from accidental
output shor t circuits or low impedance loads, the Ottocanali
blocks channel activity when the current drawn from the load
rises above a set value.

6.3 Thermal Protection

All Powersoft ampliers have variable speed fans to assist cooling.

If for some reason the cooling system can’t dissipate the produced
heat correctly, a thermal protection system is automatically
activated to avoid permanent damages. Every channel pair of
the Ot tocanali has a temperature sensor on the output stage
heat sink. Two different protection strategies are implemented
depending on the severity of the overheating. In order to protect

internal components, the amplier may automatically reduce

output power until the internal temperature returns to safe levels.

6.3.1 Thermal Warning

If the heat sink temperature reaches 70°C the front panel yellow
LEDs turn on to warn the user of a potentially dangerous thermal
event.

6.3.2 Thermal Shutdown

II the heat sink temperature rises above 80°C , the thermal sensing
circuitry will mute each power section of each channel. All the red
front panel LEDs light on to indicate thermal halt and a thermal
event switch toggles all the alarm outputs at the back of the

amplier. Only after the heat sink has cooled down to below 70°C

the channels will automatically unmute, the LEDs turn off and the
rear switch toggles again.

6.4 DC Fault Protection

In order to protect your speakers from mechanical damage caused

by a DC signal coming from the amplier’s output, a DC detection

circuit is placed between the Ottocanali’s output stage and power
supply. If a DC signal or excessive subsonic energy appears at a
channel output an instantaneous protection circuit will mute the
compromised channel pair.

6.5 Input/Output Protection

Inter ference protection is implemented in the Ottocanali to limit
out of band noise carried by the input lines. Disturbing frequencies

can interact with the output stage, causing unpredictable amplier
behavior. A ltering system is used to stop infrasonic and VHF

signals from entering the signal path.

7 User Maintenance

7.1 Cleaning

Before attempting to clean any part of the amplier, rst

disconnect the AC main source. Use a soft cloth and mild non­abrasive solution to clean the faceplate and chassis.

WARNING! Never let any liquid reach the internal par ts of the
amplier.

▶

17

Ottocanali 4K4/8K4/12K4 User Guide

7.2 Service

There are no user-serviceable parts in your amplier. Refer
servicing to qualied technical personnel.

In addition to having an in-house ser vice depar tment, Powersoft

suppor ts a network of authorized service centers. If your amplier
needs repair contact your Powersoft dealer (or distributor). You

can also contact the Powersoft Technical Service depar tment to
obtain the location of the nearest authorized service center.

7.3 Dust Removal

In dusty environments, the front side air lters clog with dust
after prolonged use. The dust gathered in the lters will interfere

with cooling. You may use compressed air to remove the dust

from lters. To remove air lters please refer to the front panel
removal procedure (Section 5.2). Air lter cleaning should be
scheduled according to the dust levels in the amplier’s operating

environment.

8 Warranty

Product Warranty:

POWERSOFT guarantees its manufactured products to be
free from defective components and factory workmanship

for a period of 48 (forty eight) months, starting from the date

of purchase printed on Powersof t’s (or any of its Authorized

Dealer’s) invoice to the end customer. All warranty repairs and
retrots must be performed at POWERSOFT facilities or at an

Authorized Service Center at no cost for the purchaser. Warranty
exclusion: POWERSOFT’s warranty does not cover product
malfunctioning or failure caused by: misuse, abuse, repair work
or alterations performed by non-authorized personnel, incorrect
connections, exposure to harsh weather conditions, mechanical

damages (including shipping accidents), and normal wear and tear.

POWERSOFT will perform warranty services provided that the
product is not damaged during transportation.

Return of Goods:

Goods can be returned to POWERSOF T only after they have

been granted a Return Merchandise Authorization (RMA) number

to be attached to the ex ternal packaging. POWERSOFT (or its

Authorized Service Center) has the right to refuse any returned

good without a RMA number.

Repair or replacement:

POWERSOFT reserves the right to repair or replace any defective
goods covered by product warranty at its sole discretion and as
it deems best.

Cost and responsibility of transport:

The purchaser (or end user/customer) is solely responsible for all

transpor tation costs and risks associated with sending warranty

covered goods to POWERSOF T or its Authorized Service
Center. POWERSOFT will assume full responsibility and cover all
costs incurred to send the goods back to the purchaser (or end

user/customer).

9 Assistance

Even though most product malfunctioning can be solved at your
premises through Powersoft Customer Care or your direct
knowledge, occasionally, due the nature of the failure, it might
be necessary to return defective products to Powersoft for
repair. In the latter case, before shipping, you are kindly asked
to follow step by step the procedure described below: Obtain
the “Defect Repor t Form” by contacting our Customer Care
Depar tment via email: [e-mail] or download the
“Defect Report Form”.

Fill out one “Defect Repor t form” for each returned

item (the form is an editable tab guided document) and

save as your name, amp model and serial Number (for

example: distributornamek10sn17345.doc) providing all

required information except the RMA code/s and send it to

[e-mail] for Powersoft approval.

In case of defect reports approved by the Powersoft Customer
Service Representative you will receive an RMA authorization

code (one RMA code for each returning device). Upon receiving

the RMA code you must package the unit and attach the RMA
code outside the pack, protected in a waterproof transparent
envelope so it is clearly visible.

All returning items must be shipped to the following address:

Powersof t srl

Via Enrico Conti, 13-15

50018 Scandicci (FI) Italy

In case of shipment from countr ies NOT belonging to the European
Community make sure you have also followed the instructions
described in the document available for download at the
TEMPORARY EXPORTATION / IMPORTATION PROCEDURE
link at http://www.powersoft-audio.com/en/support/service.html

Thank you for your understanding and cooperation and continued
suppor t as we work to improve our par tnership.

▶

18

Ottocanali 4K4/8K4/12K4 User Guide

10 Technical specication

10.1 OT TOC ANALI 4K4

Specications

General

Number of channels 8 Mono-bridgeable per channel pair

Max Output power 8-channel mode mono-bridged mode

2 Ω / Ch 4 Ω / Ch 8 Ω / Ch 70 V 10 0 V 4-8 Ω /

Ch pair

16 Ω /

Ch pair

(all channels driven) 450 W 500 W 250 W 500 W 500 W 900-1000 W 500 W

Max ou tput voltage 65 V

peak

100 V

peak

141 V

peak

135 V

peak

Max ou tput current 15 A

peak

10 A

peak

7 A

peak

15 A

peak

AC Mains Power

Power supply Unive rsal, regulated switch mode with PFC ( Power Factor Corr ection)

Operating voltage / Inrush curre nt 100 V - 240 V ±10%, 50/60 Hz

Power factor cos (φ)

> 0.95 @ > 500 W

Consum ption / current draw @ 230 V @ 115 V

Energ y Save on 35 W 0.76 A 30 W 0.65 A

Energ y Save off 58 W 0. 84 A 52 W 0.9 A

I/8 of ma x power @ 4 Ω 750 W 3.2 A 750 W 6.4 A

Thermal

Environmental operating temperature 0° - 45° C / 32° - 113° F
Thermal dissipation

Fan variable speed, te mperature controlled front to rear airow

230 V 115 V

Energ y Save on 119 B T U/ h 30 kcal/h 102 BTU/h 26 kcal/h

Energ y Save off 239 BTU/h 60 kcal/h 187 BTU /h 47 kcal/h

I/8 of ma x output power @ 4 Ω 2559 BTU/ h 645 kcal/h 2559 BTU /h 645 kcal/h

Audio

Gain 32 dB

Frequency response 20 Hz - 20 kHz ( ±0.5 d B) for 1 W @ 4 Ω or 1 W @ 8 Ω

S/N ratio (amplier section) >111 dB (20 Hz - 20 kHz A weighted)

Noise oor -67 dBV (20 Hz - 20 kHz, A weighted)

Crosst alk separation > 70 dB @ 1 kHz (4 Ω)

Input sensit ivit y @ 8 Ω 1.94 V

RMS

/ +8 dBu for max ou t power – 1.6 V

RMS

/ +6.3 d Bu for 10 00 W power

Maximum input level 6 V

RMS

/ +17.8dBu

Input impedance 10 kΩ balanced

THD+N / SMPTE IM D < 0.05% (typically <0.02%) @ 8 Ω

Slew rate 50 V/μs @ 8 Ω, input lter bypassed

Damping factor > 1000 0 @ 100 Hz (lo-Z )

Front Panel

Indicators 7 multifunction LEDs per channel: 4 x green, 2 x yellow, 1 x red
Controls Pushb utton enables 24 V DC at back P WS OU T connector (can also toggle LIN E/AUX inputs). 8 output

atte nuators , energy save mode act ivation (per channel pair) DI P swi tch

Maintenance Dust  lter foam behind front al sil ver colored panels

Rear Panel

Controls

4 DIP swi tches for each channel (allows selc tion of 70 V/100 V modes, hi-Z/lo-Z mode s, 35 Hz/70 Hz LPF, HPF on/off )

Input / Output connectors 4 x 12 pin Phoenix MC 1.5/12-ST-3.81 1803675 / 2 x 8 pin DFK- PC 4/8-G-7.62 1861219

Fault alarm connectors 2 x 12 pin Phoenix M C 1.5/12-ST-3.81 1803675
Aux command (trigger ing aux inputs) and aux

voltage for remote on/off swit ching

4 pin Phoenix M C 1.5/4-ST-3.81 1803594

Aux front swi tch enabling and extern al 24 V
DC (0.2 A) auxiliary supply

4 pin Phoenix M C 1.5/4-ST-3.81 1803594

AC mains IEC C19/22. 2 20 A, AC mains cord wi th 20 A 3-pin plug 20 A for U S, IEC Schu ko 16 A for ever y other nation

Construction

Dimensions W 483 mm / 19”, H 89 mm / 3.5” / 2 RU, D 360 mm / 14.2”

Weig ht 14 kg / 30.8 lb

▶

19

Ottocanali 4K4/8K4/12K4 User Guide

10.2 OTTOCANALI 8K4

Specications

General

Number of channels 8 Mono-bridgeable per channel pair

Max Output power 8-channel mode mono-bridged mode

2 Ω / Ch 4 Ω / Ch 8 Ω / Ch 70 V 10 0 V 4-8 Ω /

Ch pair

16 Ω /

Ch pair

(all channels driven) 900 W 1000 W 500 W 1000 W 1000 W 1800-2000 W 1000 W

Max ou tput voltage 90 V

peak

100 V

peak

141 V

peak

180 V

peak

Max ou tput current 23 A

peak

20 A

peak

14 A

peak

23 A

peak

AC Mains Power

Power supply Unive rsal, regulated switch mode with PFC ( Power Factor Corr ection)

Operating voltage / Inrush curre nt 100 V - 240 V ±10%, 50/60 Hz

Power factor cos (φ)

> 0.95 @ > 500 W

Consum ption / current draw @ 230 V @ 115 V

Energ y Save on 35 W 0.76 A 30 W 0.65 A

Energ y Save off 58 W 0. 84 A 52 W 0.9 A

I/8 of ma x power @ 4 Ω 150 0 W 6.4 A 150 0 W 13 A

Thermal

Environmental operating temperature 0° - 45° C / 32° - 113° F
Thermal dissipation

Fan variable speed, te mperature controlled front to rear airow

230 V 115 V

Energ y Save on 119 B T U/ h 30 kcal/h 102 BTU/h 26 kcal/h

Energ y Save off 239 BTU/h 60 kcal/h 187 BTU /h 47 kcal/h

I/8 of ma x output power @ 4 Ω 5118 BT U / h 1290 kcal/h 5118 B T U/ h 1290 kcal/h

Audio

Gain 32 dB

Frequency response 20 Hz - 20 kHz ( ±0.5 dB) for 1 W @ 4 Ω or 1 W @ 8 Ω

S/N ratio (amplier section) >111 dB (20 Hz - 20 kHz A weighted)

Noise oor -67 dBV (20 Hz - 20 kHz, A weighted)

Crosst alk separation > 70 dB @ 1 kHz (4 Ω)

Input sensit ivit y @ 8 Ω 1.94 V

RMS

/ +8 dBu for max ou t power – 1.6 V

RMS

/ +6.3 d Bu for 10 00 W power

Maximum input level 6 V

RMS

/ +17.8dBu

Input impedance 10 kΩ balanced

THD+N / SMPTE IM D < 0.05% (typically <0.02%) @ 8 Ω

Slew rate 50 V/μs @ 8 Ω, input lter bypassed

Damping factor > 1000 0 @ 100 Hz (lo-Z )

Front Panel

Indicators 7 multifunction LEDs per channel: 4 x green, 2 x yellow, 1 x red
Controls Pushb utton enables 24 V DC at back P WS OU T connector (can also toggle LIN E/AUX inputs). 8 output

atte nuators , energy save mode act ivation (per channel pair) DI P swi tch

Maintenance Dust  lter foam behind front al sil ver colored panels

Rear Panel

Controls

4 DIP swi tches for each channel (allows selc tion of 70 V/100 V modes, hi-Z/lo-Z mode s, 35 Hz/70 Hz LPF, HPF on/off )

Input / Output connectors 4 x 12 pin Phoenix MC 1.5/12-ST-3.81 1803675 / 2 x 8 pin DFK- PC 4/8-G-7.62 1861219

Fault alarm connectors 2 x 12 pin Phoenix M C 1.5/12-ST-3.81 1803675
Aux command (trigger ing aux inputs) and aux

voltage for remote on/off swit ching

4 pin Phoenix M C 1.5/4-ST-3.81 1803594

Aux front swi tch enabling and extern al 24 V
DC (0.2 A) auxiliary supply

4 pin Phoenix M C 1.5/4-ST-3.81 1803594

AC mains IEC C19/22. 2 20 A, AC mains cord wi th 20 A 3-pin plug 20 A for U S, IEC Schu ko 16 A for ever y other nation

Construction

Dimensions W 483 mm / 19”, H 89 mm / 3.5” / 2 RU, D 360 mm / 14.2”

Weig ht 14 kg / 30.8 lb

▶

20

Ottocanali 4K4/8K4/12K4 User Guide

10.3 OTTOCANALI 8K4 DSP+AVB

Specications

General

Numbe r of channels 8 Mono-bridgeable per channel pair
Max Output power 8-channel mode mono-bridged mode

2 Ω / Ch 4 Ω / Ch 8 Ω / Ch 70 V 100 V 4- 8 Ω /

Ch pair

16 Ω /

Ch pair

(all channels d riven) 900 W 1000 W 50 0 W 1000 W 1000 W 1800-2000 W 1000 W
Max ou tput voltage 90 V

peak

100 V

peak

141 V

peak

180 V

peak

Max ou tput c urren t 23 A

peak

20 A

peak

14 A

peak

23 A

peak

AC Mains Power

Power supply Unive rsal, re gulated sw itch mode wi th PFC ( Power Fa ctor Correction)
Operating vo ltag e / Inrush curre nt 100 V - 240 V ±10%, 50/60 Hz
Power fac tor cos (φ)

> 0.95 @ > 50 0 W

Consumption / current draw @ 230 V @ 115 V
Energ y Save on 35 W 0 .76 A 30 W 0.65 A
Energ y Save off 58 W 0.84 A 52 W 0.9 A
I/8 of ma x power @ 4 Ω 150 0 W 6.4 A 1500 W 13 A

Thermal

Environment al operating tempe rature 0° - 45° C / 32° - 113° F
Thermal dissipation

Fan variab le spe ed, te mperatu re controlled fr ont to r ear airow

230 V 115 V

Energ y Save on 11 9 B T U / h 30 kcal/h 102 BTU /h 26 kcal/h
Energ y Save off 239 BTU/h 60 kcal/h 187 B TU /h 47 kcal /h
I/8 of ma x out put powe r @ 4 Ω 5118 B T U/ h 129 0 k cal /h 5118 BT U / h 129 0 k c al / h

Audio

Gain 32 dB
Frequency response 20 Hz - 20 kHz ( ±0.5 d B) for 1 W @ 4 Ω or 1 W @ 8 Ω
S/N ratio (amplier s ecti on) >111 dB (20 H z - 20 kHz A weighted )
Noise oor -67 dBV (20 Hz - 20 kHz , A weighted)
Crosst alk se para tion > 70 dB @ 1 kHz (4 Ω)
Input sensitivit y @ 8 Ω

1.94 V

RMS

/ +8 dBu for max ou t power – 1.6 V

RMS

/ +6.3 d Bu for 10 00 W power

Maximum input level

6 V

RMS

/ +17.8 dBu

Input impedance 10 kΩ balanced
THD+N / SM PTE IM D < 0.05% (typi call y <0.02%) @ 8 Ω
Slew rate 50 V/μs @ 8 Ω, inpu t lte r bypa ssed
Dampi ng fac tor > 1000 0 @ 100 Hz (lo-Z )

DSP

A/D converter

Dual 24bi t 96 kHz Tandem® archi tecture wi th 127 dBA of dynamic range and THD <0.00 5% (20 Hz - 20 kHz)

D/A converter

Dual 24bi t 96 kHz Tandem® archi tecture wi th 122 dBA of dyna mic range and THD <0.0 03% (20 Hz - 20 kHz)

Presets 50 stored lo cally + 150 stor ed on a sm ar tcar d

Delay fo r time al ignme nt up to 4 s on the input s ect ion, u p to 32 ms pe r output, sample-by-sample s tepp ing
Crossover lters But ter wor th, Linkwit z-R iley, Be ssel , Arb itr ar y Asy mmet ric , 6dB /oct to 48dB/oct (I IR), li near p hase ( FIR), hybr id (FI R+IIR)
Output equalizer 16 fully parametric lters per chan nel, IIR : peak ing, hi/lo shel ving , hi/l o pass e q, ban d pass , band stop, all pass. Cu stom FIR up

to 384 t aps @ 48 or 96 kHz

Input e qualizer Thre e layer s (PE Q, rai sed cosine, s helv ing), 32 lte rs ea ch + group lt ers , up to 256 lte rs total
Cable compen sation network up to 2 Ω negative/positive wire compensation (Active DampingControl

TM

)

Limiters

Power limiter (True Power™, RM S volt age, RMS cu rrent) + Peak Limi ter

AVB+Ethernet

AVB Stack 100 Mbps int er face, auto M DIX
Master Cloc k Low Ji tte r clock s ynch ronized to the PTP word clock
AVB Stack IEEE 802.1as, IEEE 1722, IEEE 802.1Qav

Front Pa nel

Indicators 7 mul tifunct ion LE Ds per c hann el: 4 x gr een, 2 x yellow, 1 x red
Controls P ushb utton ena bles 24 V DC at back P WS OU T conne cto r (can also toggle LINE/AUX inpu ts). 8 out put attenuato rs,

ener gy save mode a cti vati on (pe r chan nel pair) DIP swit ch, 4 pu shbu tto n for pr eset selec tion (one per ch . pair)

Data

USB 2. 0 for backup and rmware update

Rear Panel

Controls

4 DIP switches for each cha nnel : 70V/100V mod es, hi-Z/ lo-Z modes , 35 Hz/70 Hz L PF, HPF on /off

Input / O utpu t conne ctor s 4 x 12 pin Phoe nix MC 1. 5/12-ST-3.81 1803675 / 2 x 8 pin DFK- PC 4/8 -G -7.62 1861219
Fault alarm co nnectors 2 x 12 pin Phoeni x MC 1.5/12-ST-3.81 1803675
Aux comman d (trigge ring aux input s) and aux

volta ge for remote on/off switching

4 pin Pho enix M C 1.5/4 -ST-3.81 1803594

Aux front switch enabling and exter nal 24 V
DC (0.2 A) auxiliar y supply

4 pin Pho enix M C 1.5/4 -ST-3.81 1803594

Network data incl. AVB

2 x RJ45 ports with activi ty LE Ds

AC mains IEC C19/22.2 20 A , AC mains cord w ith 20 A 3 -pin plug 20 A for US, I EC Schuko 16 A for every ot her na tion

Construction

Dimensions W 483 mm / 19”, H 89 mm / 3.5” / 2 RU, D 360 m m / 14.2”
Weig ht 14 kg / 30.8 lb

▶

21

10.4 OTTOCANALI 12K4

Specications

General

Number of channels 8 Mono-bridgeable per channel pair

Max Output power 8-channel mode mono-bridged mode

2 Ω / Ch 4 Ω / Ch 8 Ω / Ch 70 V 10 0 V 4-8 Ω /

Ch pair

16 Ω /

Ch pair

(all channels driven) 1000 w 1500 W 750 W 1500 W 15 00 W 2000-3000 W 150 0 W

Max ou tput voltage 150 V

peak

100 V

peak

141 V

peak

300 V

peak

Max ou tput current 54 A

peak

30 A

peak

21 A

peak

54 A

peak

AC Mains Power

Power supply Unive rsal, regulated switch mode with PFC ( Power Factor Corr ection)

Operating voltage / Inrush curre nt 100 V - 240 V ±10%, 50/60 Hz

Power factor cos (φ)

> 0.95 @ > 500 W

Consum ption / current draw @ 230 V @ 115 V

Energ y Save on 35 W 0.76 A 30 W 0.65 A

Energ y Save off 58 W 0. 84 A 52 W 0.9 A

I/8 of ma x power @ 4 Ω 210 0 W 10 A 210 0 W 16 A

Thermal

Environmental operating temperature 0° - 45° C / 32° - 113° F
Thermal dissipation

Fan variable speed, te mperature controlled front to rear airow

230 V 115 V

Energ y Save on 119 B T U/ h 30 kcal/h 102 BTU/h 26 kcal/h

Energ y Save off 239 BTU/h 60 kcal/h 187 BTU /h 47 kcal/h

I/8 of ma x output power @ 4 Ω 7165 BTU / h 1805 kcal/h 7165 BT U /h 1805 kcal/h

Audio

Gain 32 dB

Frequency response 20 Hz - 20 kHz ( ±0.5 dB) for 1 W @ 4 Ω or 1 W @ 8 Ω

S/N ratio (amplier section) >111 dB (20 Hz - 20 kHz A weighted)

Noise oor -67 dBV (20 Hz - 20 kHz, A weighted)

Crosst alk separation > 70 dB @ 1 kHz (4 Ω)

Input sensit ivit y @ 8 Ω 1.94 V

RMS

/ +8 dBu for max ou t power – 1.6 V

RMS

/ +6.3 d Bu for 10 00 W power

Maximum input level 6 V

RMS

/ +17.8dBu

Input impedance 10 kΩ balanced

THD+N / SMPTE IM D < 0.05% (typically <0.02%) @ 8 Ω

Slew rate 50 V/μs @ 8 Ω, input lter bypassed

Damping factor > 1000 0 @ 100 Hz (lo-Z )

Front Panel

Indicators 7 multifunction LEDs per channel: 4 x green, 2 x yellow, 1 x red
Controls Pushb utton enables 24 V DC at back P WS OU T connector (can also toggle LIN E/AUX inputs). 8 output

atte nuators , energy save mode act ivation (per channel pair) DI P swi tch

Maintenance Dust  lter foam behind front al sil ver colored panels

Rear Panel

Controls

4 DIP swi tches for each channel (allows selc tion of 70 V/100 V modes, hi-Z/lo-Z mode s, 35 Hz/70 Hz LPF, HPF on/off )

Input / Output connectors 4 x 12 pin Phoenix MC 1.5/12-ST-3.81 1803675 / 2 x 8 pin DFK- PC 4/8-G-7.62 1861219

Fault alarm connectors 2 x 12 pin Phoenix M C 1.5/12-ST-3.81 1803675
Aux command (trigger ing aux inputs) and aux

voltage for remote on/off swit ching

4 pin Phoenix M C 1.5/4-ST-3.81 1803594

Aux front swi tch enabling and extern al 24 V
DC (0.2 A) auxiliary supply

4 pin Phoenix M C 1.5/4-ST-3.81 1803594

AC mains IEC C19/22. 2 20 A, AC mains cord wi th 20 A 3-pin plug 20 A for U S, IEC Schu ko 16 A for ever y other nation

Construction

Dimensions W 483 mm / 19”, H 89 mm / 3.5” / 2 RU, D 360 mm / 14.2”

Weig ht 14 kg / 30.8 lb

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