FA SERIES
FA-250.4
FA-125.4
FA-125.2
4- and 2-channel
Power Amplifier
Operating Manual
1
FA Amplifier • Operating Manual
FA Amplifier • Operating Manual
Important Safety Instructions •
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. To reduce the risk of fire or
electric shock, do not expose
this apparatus to rain or
moisture.
6. Do not use this apparatus near
water.
7. Clean only with dry cloth.
8. Do not block any ventilation
openings. Install in accordance
with the manufacturer’s
instructions.
9. Do not install near any heat
sources such as radiators,
heat registers, stoves, or other
apparatus.
10. Do not defeat the safety
purpose of the polarized or
groundingtype 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 fit into your outlet, consult
an electrician for replacement
of the obsolete outlet.
11. Protect the power cord
from being walked on or
pinched particularly at plugs,
The lightning flash with arrowhead symbol, within
an equilateral triangle, is intended to alert the
user to the presence of uninsulated “dangerous
voltage” within the product’s enclosure that may
be of sufficient magnitude to constitute a risk of
electric shock to persons. The exclamation point
within an equilateral triangle is intended to alert
the user to the presence of important operating
and maintenance instructions in the literature
accompanying the device.
convenience receptacles, and
the point where they exit from
the apparatus.
12. Only use attachments/
accessories specified by the
manufacturer.
13. Use only with the cart, stand,
tripod, bracket, or table
specified by the manufacturer,
or sold with the apparatus.
When a cart is used, use
caution when moving the cart/
apparatus combination to avoid
injury from tip-over.
14. Unplug this apparatus during
lightning storms or when
unused for long periods of time.
15. Refer all servicing to qualified
service personnel. Servicing is
required when the apparatus
has been damaged in any way,
such as power-supply cord or
plug is damaged, liquid has
been spilled or objects have
fallen into the apparatus, the
apparatus has been exposed
to rain or moisture, does not
operate normally, or has been
dropped.
Consignes de sécurité à lire attentivement
n’accepte pas la fiche, consulter
Le symbole de la flèche dans un triangle équilateral
symbolisant la foudre est prévu pour sensibiliser
l’utilisateur à la présence de tension de voltage
non isolée à l’intérieur de l’appareil. Elle pourrait
constituer un danger de risque de décharge électrique pour les utilisateurs. Le point d’excl mation
dans le triangle équilatérale alerte l’utilisateur de la
présence de consignes qu’il doit d’abord consulter
avant d’utiliser l’appareil.
1. Lisez ces instructions.
2. Conservez ces instructions.
3. Observez les avertissements.
4. Suivez ces instructions.
5. Pour réduire le risque de feu
ou la décharge électrique, ne
pas exposer cet appareil pour
pleuvoir ou l’humidité.
6. Ne pas utiliser l’appareil près de
l’eau.
7. Le nettoyer à l’aide d’un tissus
sec.
8. Ne pas bloquer les ouvertures
de ventilation, installer selon les
consignes du fabricant.
9. Eloigner des sources de chaleur
tel: radiateurs, fourneaux ou
autres appareils qui produisent
de la chaleur.
10. Ne pas modifier ou amputer
le système de la mise à terre.
Une prise avec mise à terre
comprend deux lames dont
une plus large ainsi qu’une mise
à terre: ne pas la couper ou
la modifier. Si la prise murale
WARNING: THIS APPARATUS MUST BE GROUNDED (EARTHED)
un électricien pour qu’il
remplace la prise désuète.
11. Protéger le cordon de secteur
contre tous bris ou pincement
qui pourraient l’endommager,
soit à la fiche murale ou à
l’appareil.
12. N’employer que les accessoires
recommandés par le fabricant.
13. N’utiliser qu’avec les systèmes
de fixation,chariots, trépied
ou autres, approuvés par le
fabricant ou vendus avec
l’appareil.
14. Débrancher l’appareil lors des
orages électriques ou si inutilisé
pendant une longue période de
temps.
15. Un entretient effectué par un
centre de service accrédité
est exigé si l’appareil a été
endommagé de quelque façon:
si il a été exposé à la pluie,,
l’humidité ou s’il ne fonctionne
pas normalement ou qu’il a été
échappé.
2
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FA Amplifier • Operating Manual
FCC Compliance
This device complies with part 15 of the FCC
Rules. Operation is subject to the following two
conditions:
■ This device may not cause harmful
interference
■ This device must accept any
interference received, including
interference that may cause undesired
operation
Note: This equipment has been tested
and found to comply with the limits for a
Class B digital device, pursuant to part 15
of the FCC Rules. These limits are designed
to provide reasonable protection against
harmful interference in both a commercial
and residential installation. This equipment
generates, uses and can radiate radio
frequency energy and, if not installed and
used in accordance with the instructions,
may cause harmful interference to radio
communications. However, there is no
guarantee that interference will not occur
in a particular installation. If this equipment
does cause harmful interference to radio or
television reception, which can be determined
by turning the equipment off and on, the user
is encouraged to try to correct the interference
by one or more of the following measures:
Unpacking
As a part of our system of quality control,
every Ashly product is carefully inspected
before leaving the factory to ensure flawless
appearance.
After unpacking, please inspect for any
physical damage. Save the shipping carton
and all packing materials, as they were
carefully designed to reduce to a minimum the
possibility of transportation damage should the
unit again require packing and shipping. In the
event that damage has occurred, immediately
notify your dealer so that a written claim to
cover the damages can be initiated.
The right to any claim against a public
carrier can be forfeited if the carrier is not
notified promptly and if the shipping carton
and packing materials are not available for
inspection by the carrier. Save all packing
materials until the claim has been settled.
About Ashly
Ashly Audio was founded in 1974 by a
group of recording engineers, concert sound
professionals, and electronics designers. The
first products were elaborate custom consoles
for friends and associates, but business quickly
spread to new clients and the business grew.
The philosophy we established from the
very beginning holds true today: to offer only
the highest quality audio tools at an affordable
cost to the professional user − ensuring
reliability and long life. Years later, Ashly
remains committed to these principles.
Ashly’s exclusive five-year, worry-free
warranty remains one of the most generous
policies available on any commercial- grade
product. The warranty covers every product
with the Ashly brand name, and is offered at no
extra cost to you.
Please read this entire manual to fully
understand the features and capabilities of this
product.
■ Reorient or relocate the receiving
antenna.
■ Increase the separation between the
equipment and receiver.
■ Connect the equipment into an outlet on
a circuit different from that to which the
receiver is connected.
■ Consult the dealer or an experienced
radio/TV technician for help.
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FA Amplifier • Operating Manual
Table of Contents
1 Introduction .................. 4
2 Requirements ................4
2.1 AC mains .......................... 4
2.2 Input wiring ...................... 5
2.3 Speaker wire .....................5
2.4 Remote control wire ......... 5
2.5 Mechanical ...................... 5
2.6 Cooling ............................ 6
3 Amplifier Protection ....... 6
4 Front Panel Features ......7
4.1 Level controls ................... 7
4.2 Status LEDs ...................... 7
4.3 Power Switch ................... 7
4.4 Model Number ................. 7
5 Rear Panel Features .......8
5.1 Maintenance .................... 8
5.2 DIP switches .................... 8
a. Lo-Z/Hi-Z ...................... 8
b. Hi-Z 70V/100V ............. 8
c. Input sensitivity ............ 8
d. Standby polarity............ 8
e. Front panel lock ............. 8
5.3 Utility Function Connector 9
a. Remote DC level control 9
b. Standby ........................ 9
c. Fault Logic Output ........ 9
5.4 Balanced Input ..................9
5.5 Speaker Outputs ................ 9
5.6 AC Mains ...........................9
6 Troubleshooting .......... 10
7 Specifications ....... 11-12
8 Warranty .................... 13
1 Introduction
Thank you for your purchase of this Ashly
FA power amplifier. This product uses state
of the art, light weight, high efficiency
switching technology developed through
years of design and testing. FA amplifiers are
available in two power levels, designed to
meet the most demanding live sound and fixed
installation sound systems in stadiums, arenas,
performance venues, restaurants, worship
spaces and conference centers.
1.2 Features
• 2 x 125W (half-rack), 4 x 125W (half-rack),
or 4 x 250W (full-rack)models
• Active power factor correction (PFC)
• Power-sharing on 125W models
• Low-Z or High-Z (70V/100V) output mode
per channel
• Euroblock input and output connectors
• Front panel soft-power switch
• Front panel level controls, fully off = mute
• Front panel status LED per channel for
signal, limit, mute, input clipping, protect
• Input sensitivity select: +4dBu or -10dBv
• Standby mode contact closure with normally
open/normally closed polarity switch
• Automatic sleep mode (non-defeatable)
• Front panel lock
• Remote DC level control per channel (2 channel
model), per channel pair (4 channel models)
• Protect mode fault logic output
• Universal 100-240VAC operation, 50-60Hz
• Detachable AC connector
• USB connector for firmware update
• Variable cooling fan
• Rack mount or table/wall mount kit available
for half-rack models
• Rear support kit available for all models
• Protection: Over-temperature, output short-
circuit/over-power, output DC, mains fuse
• Safety/Compliance: UL, CE, FCC Class B,
Energy Star®, RoHS
• Ashly five year warranty
2 Requirements
Before connecting to AC mains power,
make sure that the mechanical installation,
wiring, cooling requirements, and controls
are all set to the configuration needed for
your particular application. Failure to do so
could result in damage to the unit or to other
components in the system.
2.1 AC Mains Requirements
This amplifier will auto-detect AC mains voltage
from 100-240VAC, 50-60Hz. At nominal 120VAC
mains, the allowed operating range is 85135VAC to allow for brownouts or power surges,
and for nominal 240VAC operation the range is
170-265VAC. Use only the provided AC cord to
connect to AC mains. The power consumption
is indicated on the back panel near the AC inlet.
To reduce the risk of ground loop hum, all sound
system ground references should originate at the
same AC power distribution point. Do not lift or
remove the amplifier power cord ground pin.
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FA Amplifier • Operating Manual
2.2 Input Signal Wire Requirements
Use shielded wiring for balanced or unbalanced
audio signals. Shielding which is properly
grounded will protect the signal from outside
electrical interference such as RF, fluorescent
lighting, and computer/video emissions.
Unbalanced lines of less than 10 feet are
generally ok, but for greater distance or noisy
field environments, always use balanced signal
wiring.
If using an unbalanced input source, wire the
hot signal to the amplifier's (+) input Euroblock
pin, and connect the (-) input pin to ground. Do
not leave the (-) input pin unconnected.
Avoid running low level signal wires in close
proximity or parallel to long speaker cables, AC
power cables, or power transformers, as they
can induce hum or oscillation.
2.3 Speaker Wire Requirements
Note: The sound system installer is responsible
for using loudspeaker wiring that is in
compliance with local electrical code. The
following recommendations for speaker wiring
are based on UL 60065 section 5.2-d and the
US National Electrical Code Article 725. These
are only guidelines, consult your local code for
specific up to date requirements.
• Class 2 wiring is typically used when the
maximum measured open-circuit speaker
output voltage is less than 120V rms.
Speaker wire gauge: FA amplifiers are capable
of delivering high levels of output current, so
the wire gauge used for speaker outputs is
important. Inadequate wire gauge, especially
over long distance, adds significant resistance
to the speaker’s own impedance, reducing
the power which is actually delivered to the
speaker. It could also result in a decreased
damping factor and potential fire hazard. Since
power at the speaker load is of primary concern
in system design, refer to the table below to
best determine appropriate wire gauge for your
application.
The following table lists the resistance per 100
feet of common copper wire gauges, and also
lists the percentage of the speaker load power
which would be lost as heat in an arbitrary
100 ft run of different gauges of 2-conductor
copper speaker wire.
Wire
Gauge
#8 0.0605Ω 0.8% 1.5% 3%
#10 0.1018Ω 1.3% 2.5% 5%
#12 0.1619Ω 2.0% 4.0% 8%
#14 0.2575Ω 3.2% 6.4% 12.8%
#16 0.4094Ω 5.1% 10.2% 20.4%
#18 0.6510Ω 8.1% 16.3% 32.6%
This table expresses the power loss as a
percentage of the load’s power rather than
the total amplifier output power in order to
accurately determine power loss at other cable
lengths. For example, if you plan to deliver 150
watts to an 8 Ohm load through 50 ft of 14 ga.
cable, the power loss in the cable would be
half that of a 100 ft run of #14 wire as shown
in the table, or 1.6% of 150W, which is an
insignificant 2.4 watts. However, if you were
to run 200 ft of 18 ga. cable to a 2 Ohm load,
the loss would be twice that of the 100 ft run
shown in the table, or 65.2% of 250W, which is
163 watts lost as heat. Always be sure to use
adequate gauge speaker wire.
Ohms
/100ft
8Ω
load
4Ω
load
2Ω
load
2.4 Remote Control Wire
• Remote DC level control - Bell or telephone
wire is sufficient for DC level control to an
Ashly WR-1 or similar equivalent. CAT5
cable can also be used. The +3V and Gnd
pins can be shared among remote control
potentiometers, however do not connect
remote control ground to any external
grounds.
• Remote Standby - This is a logic level signal
which can use unshielded low gauge wire.
2.5 Mechanical
FA-125.2 and FA-125.4 models use a 1RU
half-rack chassis. The FA-250.4 model uses a
1RU full rack chassis. See the specifications for
dimensions.
Hardware kits are available for purchase from
Ashly for mounting half-rack models to a 19"
rack or table/wall surface, plus a rear support
kit is also available for all models.
• FA-TWB kit (sold separately): For mounting a
half-rack unit to a table or wall. Not available
for full-rack unit:
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FA Amplifier • Operating Manual
• FA-1.2RM kit
installing one or two half-rack units into a
19" equipment rack:
• FA-2.2RPM kit
additional rear rack support for touring or
mobile applications:
Use all four screws when mounting the
amplifier to the front rack rails. In some
installations where the sound system is
exposed to a high level of RF noise or systeminduced oscillation, it may be necessary to
ground the amplifier’s chassis to the rack
enclosure. This is accomplished using star type
lockwashers on the four rack mounting screws,
placed between the amplifier chassis and the
rack rails. These star washers will penetrate
through the amplifier and rack rail finish to
adequately ground the chassis to the rack.
(sold separately)
(sold separately)
: For
: For adding
2.6 Cooling
Air vents on the amplifier rear panel must have
access to free flowing room temperature air
between 32°F and 104°F (0°C-40°C). Air is
drawn in through the side and blown out the
back. It is not necessary to leave empty rack
spaces above or below the amplifier. See the
specifications section for amplifier thermal
output characteristics in BTU/hour.
3 Amplifier Protection
Thermal Protection - Thermal protection will
engage at an internal estimated component
temperature of 185°F (85°C). The amplifier will
mute and maintain that state until the internal
estimated component temperature drops
below 176°F (80°C).
Overpower Protection - Overloading the unit’s
output will cause the DSP to limit the signal.
Once the amplifier is no longer signaling an
overload, the DSP will slowly increase the
volume back to the desired level. Continuously
overloading the output will ultimately cause
a “pumping” sound, which will give a reduced
listening experience, but isn’t harmful for the
amplifier. Note that long-term overload of the
output may cause the thermal protection to
engage.
Output DC and Rail Fault Protection – If DC
is detected on the output, the amplifier will
mute for a brief period and then try to resume a
normal state. The amplifier will cycle this a total
of 3 times, but if a DC is still present, the power
supply turns off and latches, requiring a power
cycle or removal of the AC cord to reset the
protection circuitry.
AC Mains voltage - The amplifier should
always be used in its intended voltage range
of 100-240 VAC and may never exceed
the approved safety limits of 85-265 VAC.
Minimum startup voltage is 85VAC. A fail-safe
shutdown circuit engages at 290VAC, however
the amplifier may be damaged and require
servicing if the mains voltage exceeds 265VAC.
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FA Amplifier • Operating Manual
4 Front Panel Features FA-125.4 shown, other models have similar features
4.1 Level Controls
Each channel has its own level
control. This control also sets
the maximum level allowed
before any further attenuation
is applied using remote DC
level control. Level controls can
be disabled using the Lock/
Unlock DIP switch on the rear
panel.
4.2 Status LEDs
Each channel uses a single three-color status
LED to indicate signal, limit, mute, input
clipping, and protect.
• GREEN (signal): The green LED lights when
signal reaches 45dB below full output.
• AMBER (limit): The amber LED lights when
output has reached full power, and indicates
that automatic signal limiting is being used
to prevent output clipping.
• RED (mute, input clipping, protect):
Mute: A status LED will be solid red when its
channel is muted. Muting occurs when level
controls are turned fully CCW, or when the
amplifier has entered pre-sleep mode after
15 minutes of inactivity.
Input Clipping:
there is clipping detected at the input stage.
Protect:
1-2, 3-4) turn solid red to indicate the channel
pair is in protect mode, shutting down their
shared power supply. The 250W model uses a
dedicated power supply on each channel, so
protect mode applies to individual channels.
On 125W models, status LED pairs (ch.
Status LEDs will flash red when
4.3 Power Switch/LED
This switch is used for powering the amplifier
on or off, and can be disabled using the Lock/
Unlock DIP switch on the rear panel. Its white
LED indicates power on, off, pre-sleep, sleep, or
standby mode. The possible power switch LED
states are:
• Fully off: The amplifier is completely off.
• Fully lit: The amplifier is powered up.
• Fully lit with all status LEDs solid red: The
amplifier is in pre-sleep mode, muting all
channels after 15 minutes of inactivity.
• Brief flash every two seconds: The amplifier
is in Energy Star® sleep mode, resulting from
29 minutes of inactivity.
• Flashing evenly @ 1Hz: The amplifier is in
standby mode due to contact closure.
Pre-Sleep Mode:
mutes all channels after 15 minutes of inactivity,
however remains powered up for instant wakeon-audio. I
wake the amp from pre-sleep mode.
nput signal greater than -45dBu will
The amplifier automatically
Energy Star® Sleep Mode: The amplifier will
power down after 29 minutes of inactivity, then
automatically wake-on-audio when it detects
input signal greater than -45dBu.
If the power switch is used to turn off the unit
while it is in sleep mode, the amplifier will enter
the full OFF state and disable automatic wakeon-audio. The amplifier can only power up
again by pressing the power switch.
Sleep and pre-sleep mode settings are all part of
Energy Star function and are non user-adjustable.
Standby Mode:
standby mode using the rear panel contact
closure, either by connecting or disconnecting
the standby pin to ground, depending on the
standby polarity DIP switch setting. When placed
in standby mode, automatic wake-on-audio is
disabled. The standby contact closure circuit has
priority over automatic wake-on-audio.
The amplifier is put into
4.4 Model Number
The first three numbers of the model number
express the power rating per channel of the
amplifier. The last number is the channel count.
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FA Amplifier • Operating Manual
5 Rear Panel Features FA-125.4 shown, other models have similar features
5.1 Maintenance
This USB-C connector is used
for firmware update.
5.2 DIP Switches
The DIP switches set Low-Z
or Hi-Z mode per channel,
70V/100V output when in
Hi-Z mode, +4dB/-10dBV
Input Sensitivity, Standby
Polarity, and Front Panel Lock.
The illustrations below show
four-channel models, but are
similar to the two-channel model.
5.2a Low-Z/High-Z Select
Each channel can
be individually set
for low impedance
output (Lo-Z, 4
or 8 Ohm) or high
impedance (Hi-Z,
70V or 100V)) for
driving constant voltage speaker lines. Set the
switch for Low-Z and for Hi-Z.
5.2b Hi-Z 70V/100V Select
On channels set
for Hi-Z output,
this switch sets the
output voltage to
either 70V or 100V.
This is a global
switch, meaning all
channels set to Hi-Z will be either 70V or 100V.
Set the switch for 70V and for100V.
5.2c Input Sensitivity Select
Input sensitivity
is the input signal
level which will drive
the amplifier to full
output. This switch
sets input sensitivity
for all inputs to either
+4dBu for typical pro audio device outputs, or
-10dBv for typical hi-fi level devices. Set the
switch for +4dBu, or for -10dBV sensitivity.
5.2d Standby Polarity Select
This switch sets the
polarity requirement
for placing the
amplifier into standby
using the contact
closure pin (sec.
5.3b).
Set the switch to the position (normally
open), for the amplifier to go into standby mode
when the standby pin is connected to ground.
Set the switch to the position (normally
closed) for the amp to go into standby mode
when the standby pin is pulled high or left
unconnected.
5.2e Front Panel Lock
To lock all front panel controls, set the switch to
the
position
When the front
panel level controls
become locked, their
current values are
saved. In order to
avoid high volume
when unlocking the
unit, the volume will not change until the level
control positions are at or lower than their
initial saved values. If unsure, turn level controls
all the way down before unlocking.
Note: Remote DC level (VC) inputs continue to work
normally even when front panel controls are locked.
Locking the power switch only prevents the
amp from being turned off. If the switch is
locked and AC power gets interrupted while the
unit is on, the amp will automatically power up
again when AC is restored.
. Set the switch to unlock
.
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FA Amplifier • Operating Manual
5.3 Utility Function Connector
5.3a Remote DC Level Control
On the two-channel model (not shown),
each VC input controls its own channel. On
four channel models (shown), each VC input
controls a channel pair. The maximum volume
when using remote DC voltage control is set
by the front panel level knobs. See the diagram
above for proper wiring.
5.3b Standby
This pin is used for
contact closure
control of standby
mode, placing the
amplifier into a low
power consumption
state. There is also a switch that sets standby
circuit polarity(see sec. 5.2d).
amplifier goes into protect mode. Use this pin
to drive an external logic monitoring device.
5.4 Balanced Input
A Euroblock
connector is used
for wiring a balanced
input. If using an
unbalanced signal
source, wire the input
signal to the (+) pin,
shield to (G), and also wire the (-) input pin to
ground. Maximum input level is +24dBu.
5.5 Speaker Outputs
Caution: Never connect a [+] or [-]
speaker output to external ground or
shared wiring panel. All speaker wire
connections must be made directly
to the Euroblock connector pins as
shown below:
Hi-Z (70V / 100V) speaker connections use
different Euroblock pins than Lo-Z. Be sure to
use the correct pin connections for Hi-Z or Lo-Z
applications as shown. The two innermost pins
are NOT USED.
Note: Output channel pairs on 125W models
utilize Power-Sharing, see power amp
specifications for details.
5.6 AC Mains Connector
Always use the AC cord provided with your unit
for connecting to AC power.
The amplifier will auto-detect AC voltage from
100-240VAC, 50-60Hz.
WARNING: Do not remove or lift the AC
connector ground.
When the amplifier is put into standby mode
using the STBY contact closure, automatic
sleep mode wake-on-audio is disabled, and the
front panel power switch is also disabled.
5.3c Fault Logic Output
In normal operation
the Fault output
pin remains high
(+3V). The Fault pin
transitions to logiclow output (OV) if the
Speaker connections are configured for
either high impedance output (Hi-Z), or
low impedance output (Lo-Z) using the DIP
switches as shown in section 5.2a.
Lo-Z is for 4 Ohm or higher loads, Hi-Z is for 70V
or 100V loads.
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FA Amplifier • Operating Manual
6 Troubleshooting
No AC Power
• Is the detachable AC power cord fully
installed? Is it plugged into a known live
outlet?
• Has the amplifier been powered off while in
sleep mode? Press power switch again.
Unit Won't Power Off
• Are front panel controls disabled using the
rear-panel DIP switch?
Level Controls Don't Work
• Are front panel controls disabled using the
rear-panel DIP switch?
No Amplifier Output
• Is the amplifier in pre-sleep or sleep mode
due to audio inactivity?
• Is the amplifier in standby mode?
• Is signal getting to the amplifier?
• Is the amp in protect mode due to over-
temperature, excess power, shorted output,
or output DC?
• Is the input sensitivity switch set incorrectly
for the current input signal level, causing
input stage clipping? If so, increase the input
sensitivity or turn down the input source
level.
VC Inputs Don't Work
• Are the front panel level controls turned
down?
• Were front panel level controls disabled after
being turned down?
Still Not Working?
• Contact Ashly technical support at 1-800-
872-0010 x124, or email service@ashly.com
• Is the input signal properly wired?
• Are Lo-Z / Hi-Z DIP switch settings and
speaker wire connections all correct?
• Are front panel or remote DC control
attenuators turned down?
• Is the amplifier in protect mode?
Status LED Stays Red
• Is a front panel level control or remote DC
Level control turned fully off forcing the
channel to mute?
• Is the amplifier in pre-sleep mode?
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FA Amplifier • Operating Manual
7 Specifications
Typical Output Power
(per channel, measured in Watts)
CEA-2006/490A, 20ms 1kHz 1%THD+N, 480ms 1kHz -20dB, 120VAC,
all channels driven at rated load
FA125.2 FA125.4 FA250.4
Low Z output
4 Ohm 125 125 250
8 Ohm 125 125 250
70V/100V output
70V 125 125 250
100V 125 125 250
Maximum Output Power during Power-Sharing*
(per channel, in Watts)
Power Sharing Yes Yes No
Low Z output
4 Ohm 250 250 250
8 Ohm 250 250 250
70V/100V output
70V 250 250 250
100V 250 250 250
*Power-Sharing: On 125W models only, each channel pair has a power
supply which cannot exceed 250W. Either channel can deliver 250W if
the supply allows. For example, you can pull out 250W from CH1 if you
don’t use CH2. Similarly, you could pull 50W from CH1 and 200W from
CH2, or 125W from both channels. In any combination, the maximum
power for each channel pair is 250W.
Power Draw
(1/8 full power, 1kHz sine-wave on all channels, in Watts)
FA125.2 FA125.4 FA250.4
Sleep mode <0.5 <0.5 <0.5
Idle Lo-Z (no signal) 8 15 25
Idle Hi-Z (no signal) 13 25 30
1/8 max power, 4 Ohm 52 104 196
1/8 max power, 8 Ohm 49 96 186
1/8 max power, 70V 51 101 191
1/8 max power, 100V 48 96 181
Thermal Dissipation
(BTU/hour with typical input, all channels driven, 120VAC)
Sleep mode <1.7 <1.7 <1.7
Idle Lo-Z (no signal) 28 52 86
Idle Hi-Z (no signal) 45 85 103
1/8 max power, 4 Ohm 72 144 243
1/8 max power, 8 Ohm 62 116 209
1/8 max power, 70V 69 133 226
1/8 max power, 100V 58 116 191
Voltage Gain
(per output mode and input sensitivity setting, in dB)
Lo-Z @ -10dBV 43.1 43.1 43.1
Hi-Z 70V @ -10dBV 46.9 46.9 46.9
Hi-Z 100V @ -10dBV 49.1 49.1 49.1
Lo-Z @ +4dBu 31.3 31.3 31.3
Hi-Z 70V @ +4dBu 35.1 35.1 35.1
Hi-Z 100V @ +4dBu 37.3 37.3 37.3
11
FA Amplifier • Operating Manual
Specifications (continued)
Audio Performance
Distortion (SMPTE, typical) <0.5%
Distortion (THD-N, typical) <0.5%
Signal to Noise (+4dBu sensitivity,
20Hz-20kHz, unweighted)
Crosstalk <65dB
Frequency Response 20Hz-20kHz, +/-0.05dB
High Pass Filter 80Hz, HiZ mode only, non-defeatable
Clip Limiter
Damping Factor
(8 Ohm load, <1kHz)
>102dB
at clip threshold of 24dBu, non defeatable
>250
Connections
Remote DC Level Control
(Gnd, VC, +3V)
Standby Contact Closure
Fault Logic Output
Balanced Input (per channel) Euroblock (3.5mm)
Input Impedance 10k Ohm
Maximum Input Level +24dBu
Speaker Output (per channel) Euroblock (5.08mm)
Euroblock (3.5mm), +3V fully on,
Gnd fully attenuated
Euroblock (3.5mm),
set DIP switch for polarity
Euroblock (3.5mm), +3V output normal,
0V for amp protect mode
DIP Switch Settings
Switch 1-2 or 1-4: Output Mode
Switch 5: High Impedance Mode Hi-Z channels only, 70V or 100V
Switch 6: Input Sensitivity all channels, +4dBu or -10dBV
Switch 7: Standby Polarity
Switch 8: Front Panel Lock unlock (down), lock (up)
per channel, low impedance (Lo-Z) or
high impedance (Hi-Z)
down = normally open (NO)
up = normally closed (NC)
Front Panel
Power Switch LED (white) On, off, flashing during sleep/standby
Attenuators (per channel) Recessed front panel, fully off = mute
Front Panel Status LED (per channel)
Green On at 45dB below full power
Amber On at full power, output limiting engaged
Red On for input overload, amp protect, mute
General
Pre-Sleep Mode
Sleep Mode
Standby Mode
Remote Control Options WR-1, WR-1.1 DC level control
Amplifier Protection
Cooling variable speed fan, air vented out back
Power Cable Connector IEC
Power Supply 100-240VAC, 50-60Hz
Minimum Startup Voltage
Environmental 32°F-104°F, (0°C-40°C) noncondensing
Safety/Compliance UL, Energy Star®, CE, FCC Class B, RoHS
>15 minutes inactivity,
all channels muted, wake-on-audio
>29 minutes inactivity,
Energy Star® power saving mode,
power LED blinks every two seconds,
wake-on-audio
contact closure activated,
power LED flashes evenly @1Hz
Over-temperature, output DC, output
over-power, AC mains voltage, mains fuse
85VAC@ 120V nominal,
170VAC@ 240V nominal
Dimensions and Weight
Unit Dimensions
FA125.2
FA125.4
FA250.4
Unit Weight
FA125.2 3.55lbs (1.61kg)
FA125.4 5.36lbs (2.43kg)
FA250.4 7.89bs (3.58kg)
Shipping Dimensions
FA-125.2 and FA-125.4
FA-250.4
Shipping Weight
FA125.2 5.66lbs (2.57kg)
FA125.4 7.14lbs (3.24kg)
FA250.4 10.12lbs (4.59kg)
8.66”W x 1.72”H x 10.32”D
(220 x 43.7x 262mm)
8.66”W x 1.72”H x 13.3”D
(220 x 43.7 x 338mm)
17.33”W x 1.72”H x 11.54”D
(440 x 43.7 x 293mm)
23" x19.4" x 8.94"
(585 x 492 x 227mm)
28.7" x23.2" x 8.94"
(729 x 590 x 227mm)
12
FA Amplifier • Operating Manual
LIMITED WARRANTY (USA ONLY)
(Other countries please contact your respective
distributor or dealer.)
For units purchased in the USA, warranty service for
this unit shall be provided by ASHLY AUDIO, INC. in
accordance with the following warranty statement.
ASHLY AUDIO, INC. warrants to the owner of
this product that it will be free from defects in
workmanship and materials for a period of FIVE
years from the original-date-of-purchase, with the
exception of touch-screen displays and motorized
faders which are warrantied for THREE years from
the original-date-of-purchase.
ASHLY AUDIO INC. will without charge, repair or
replace at its discretion, any defective product
or component parts upon prepaid delivery of the
product to the ASHLY AUDIO, INC. factory service
department, accompanied with a proof of originaldate-of-purchase in the form of a valid sales receipt.
This warranty gives you specific legal rights, and you
may also have other rights, which vary from state to
state.
EXCLUSIONS: This warranty does not apply in
the event of misuse, neglect, or as a result of
unauthorized alterations or repairs made to the
product. This warranty is void if the serial number
is altered, defaced, or removed. ASHLY AUDIO,
INC. reserves the right to make changes in design,
or make additions to, or improvements upon, this
product without any obligation to install the same on
products previously manufactured.
Any implied warranties, which may arise under the
operation of state law, shall be effective only for
FIVE years (THREE years for touch-screen displays
and motorized faders) from the original-date-ofpurchase of the product. ASHLY AUDIO, INC. shall
be obligated to only correct defects in the product
itself. ASHLY AUDIO, INC. is not liable for any damage
or injury, which may result from, or be incidental to,
or a consequence of, such defects. Some states do
not allow limitations on how long an implied warranty
lasts, or the exclusion, or limitation of incidental or
consequential damages, so the above limitations or
exclusions may not apply to you.
OBTAINING WARRANTY SERVICE:
RMA ???
For warranty service in the United States, please
follow this procedure:a
1) Return the product to ASHLY AUDIO, INC. freight
prepaid, with a written statement describing the
defect and application that the product is used
in. ASHLY AUDIO, INC. will examine the product
and perform any necessary service, including
replacement of defective parts, at no further cost to
you.
2) Ship your product to:
ASHLY AUDIO, INC.
Attention: Service Department
847 Holt Road
Webster, NY 14580-9103
ASHLY AUDIO INC. 847 Holt Road Webster, NY 14580-9103, USA
Phone: (585) 872-0010 Fax: (585) 872-0739
Toll Free (800) 828-6308 www.ashly.com
©2020 Ashly Audio, Inc. All rights reserved worldwide.
Ashly Audio is a division of Jam Industries, Ltd. All features, specifications, and graphical representations
are subject to change or improvement without notice.
FA R0 01-2020
13
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