Velodyne SC-12, SC-IC, SC-IF, SC-8, SC-10 DATASHEET

SubContractor
Series

Amplifier /
Subwoofers

USER’S

MANUAL

™

SC-1250 Amplifier,
SC-8, SC-10, SC-12, SC-15,
SC-IW, SC-IF, SC-IC Subwoofers

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SubContractor User’s Manual

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Attention!

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SubContractor User’s Manual

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Vorsicht!

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SubContractor User’s Manual

III

Attenzione!

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SubContractor User’s Manual

IV

Table of Contents

C

ongratulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Product Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

– SC-1250 Subwoofer Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

– SC-8, SC-10, SC-12, SC-15, SC-IW, SC-IF Woofers . . . . . . . . . . . . . . . . . . . . . . . . .2

Setup Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

– Front Panel Controls and Displays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

– Rear Panel Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

– About Low-Pass Crossovers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

– A Word About Your Receiver’s Crossover and the SC-1250 Crossover . . . . . . . . . . .10

– A Word About Interconnect Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

– A Word About Subwoofer Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Selecting the Subwoofer(s) to be Controlled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

– Using the SC-1250 to Drive Two Subwoofers . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Restore Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Care of Your Amplifier and Subwoofer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

– Troubleshooting and Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Appendix A: RS

-232 Serial Over

view and Commands . . . . . . . . . . . . . . . . . . . . . . . . .18

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SubContractor User’s Manual

V

Congratulations

C

ongratulations on your purchase of a Velodyne SubContractor Series subwoofer. This system
represents the state-of-the-art in low frequency reproduction. Read and follow the instructions
below to insure safe and proper system operation.

Warning!

To prevent fire or shock hazard, do not expose this equipment to rain or moisture. To avoid
electrical shock, do not open speaker enclosure or amp chassis cover. Please observe all
warnings on the equipment itself. There are no user serviceable parts inside. Please refer all
service questions to your authorized Velodyne dealer.

Prior to Installation

Please unpack the system carefully. Remove all staples used to seal the carton as they can
scratch the chassis. Please save the carton and all packaging materials for future use. Record
the serial number in the space provided on the warranty card for future reference.

Product Features

SC-1250 Subwoofer Amplifier

• Amplifier: 3000 watts dynamic/1250 watts RMS high efficiency, Class D

• DSP-controlled

• 4 selectable pr

• Automatic 7 band r

• Night-mode setting

• Mute control

• Adjustable (30 to 160 Hz) low-pass crossover (defeatable)

• Line-level (RCA) inputs and outputs

• Speaker-level inputs with 5 way binding post connections

• Signal sensing auto turn on/off (defeatable)

• Variable volume control

• Selectable phase control (0, 90, 180 or 270 degrees)

• Built-in adjustable digital low-pass cr

• Driver Displacement Control software to prevent over excursion and amp clipping

• Blue power indicator LED

• RS-232 Serial Interface

• 12 Volt trigger

• Universal remote input jack

• Ability to drive up to TWO subwoofers**

** If two subwoofers ar
subwoofers can be r
SC-1250, only one can be driven.

esets for customized listening mode

oom equalizer (microphone included)

ossover with 24 dB/octave slope

e driven, they must each have 8 ohm or higher impedence. SC Series

un in this fashion. If a more traditional 4 ohm subwoofer is driven with the

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SubContractor User’s Manual

1

SC-8, SC-10, SC-12, SC-15, SC-IW, SC-IF/IC Subwoofers

S

C-8:

- 8” (6.5” piston diameter) subwoofer

- 2.5” high-temp voice coil

- Oversized spider for linearity at high excursion

- High-excursion EPDM rubber surround

- 107 ounce magnet/204 ounce motor structure

- Frequency Response: 28 - 120 Hz (+/- 3 dB)

- 8 ohm impedance

SC-10:

- 10” (8” piston diameter) subwoofer

- 3” high temperature inside/outside voice coil

- Oversized spider for linearity at high excursion

- High-excursion EPDM rubber surround

- 162 ounce magnet/346 ounce motor structure

- Magnetically shielded for video use

- Frequency Response: 24 - 120Hz (+/- 3 dB)

- 8 ohm impedance

SC-12:

- 12” (9.7” piston diameter) subwoofer

- 3” high temperature inside/outside voice coil

- Oversized spider for linearity at high excursion

- High-excursion EPDM rubber surround

- 162-ounce magnet/346 ounce motor structur

- Magnetically shielded for video use

- Frequency Response: 22 - 120Hz (+/- 3 dB)

- 8 ohm impedance

e

SC-15:

- 15” (12.7” piston diameter) subwoofer

- 3” high temperature inside/outside voice coil

- Oversized spider for linearity at high excursion

- High-excursion EPDM r

- 162-ounce magnet/346 ounce motor structure

- Magnetically shielded for video use

- Fr

- 8 ohm impedance

SC-IW (In-W

-

- Neodymium magnet structure

- Quad spider configuration with upper/lower spider modules

- High-excursion EPDM rubber surround

- 3” high temperature inside/outside voice coil

- Magnetically shielded for video use

- Frequency Response: 22 - 120Hz (+/- 3 dB)

- 8 ohm impedance

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ound

ubber sur

equency Response: 22 - 120Hz (+/- 3 dB)

all):

4” x 14” rectangular driver (3” x 13.25” piston diameter) with flat Carbon
Fibre/Rohacell/Carbon Fiber sandwich diaphragm

r

SubContractor User’s Manual

2

S

C-IF/SC-IC (In-Floor/In-Ceiling):

- 12” (9.7” piston diameter) subwoofer

-

3” high temperature inside/outside voice coil

- Oversized spider for linearity at high excursion

- High-excursion EPDM rubber surround

- 162 ounce magnet/346 ounce motor structure

- Magnetically shielded for video use

- Frequency Response: 22 - 120Hz (+/- 3 dB)

- 8 ohm impedance

Setup Checklist

Be sure to do the following to ensure the best performance from your subwoofer(s):

❑ If possible, optimize the placement of the subwoofer(s) in the listening area.

See page 11 of the User’s Manual.

❑ Install and wire the subwoofer per the instructions on pages 3 - 9.
❑ Select the proper model per the instructions on page 11.
❑ Be sure the low pass crossover is set correctly. See pages 9 - 10.
❑ Be sure to equalize the subwoofer using the microphone and Auto-EQ feature.
❑ Be sure to set the phase control on the remote. See page 12.
❑ Select the correct pr

eset for the source material. See pages 13 – 14.

Your new Velodyne amplifier provides for a number of installation options. Read all the
installation information below in order to determine which installation option is best for your
system. Remember to perform all installation procedures with system power turned off.

Installation

FRONT PANEL CONTROLS AND DISPLAYS

8

8

1

1

Figure 1: Front Panel Connections of the SC-1250.

Following are brief descriptions of the controls described in Figure 1. More detail on these
controls can be found in the next section.

3

2

3

2

4

4

5

5

6

6

7

7

8

8

(1) Power LED

This LED illuminates when the power is on. Blue is nor
the unit is in standby mode or the remote has been used to deactivate the unit. This LED
dims when the unit is in night mode.

(2) Power Switch

This push button style switch is the main on/off for the unit.

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mal operation. It tur

SubContractor User’s Manual

ns amber when

3

(

3) Mic Input

Connect the supplied microphone for the Auto-EQ feature to this mini-jack.

(4) Remote Eye

This is the eye that receives infrared commands from the supplied remote.

(5) Low-Pass Crossover

Use these up and down buttons to select the high-frequency range at which you wish to cut
off the signal to the subwoofer. The frequency is indicated on the LED display briefly, then
the display reverts to showing the subwoofer’s volume. The slope is fixed at 24 dB/octave.
To deactivate the crossover, press BOTH the up and down crossover buttons at the same
time – two dashes on the display indicate the crossover is deactivated and the woofer
plays all frequencies presented to it. Please see page 9 for a more detailed discussion
on crossovers.

(6) LED Numeric Indicator

This LED supplies information on volume, crossover, woofer type, and other information. The
light button on the remote deactivates this display. Upon startup, the display shows the
model of subwoofer the SC-1250 is controlling, then reverts to the volume indicator.

Volume Contr

(7)

These buttons allow you to balance the output from the subwoofer to the main speakers in
your system. The volume should be set to achieve similar volume level from between both
the main speakers and subwoofer. The default volume is 30.

Note: Volume is also controllable by using the supplied remote.

Optional Rack Mount

(8)

These detachable ears allow the SC-1250 to be rack mounted.

REAR PANEL CONNECTIONS

ol

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SubContractor User’s Manual

4

Figure 2: Rear Panel Connections of the SC-1250.

(9) Thru Jacks (

T

hese RCA connectors are for passing along the same signal that goes into your subwoofer
to a second “daisy-chained” subwoofer. The signal from these RCA connectors is the same
as the input signal.

(10) Line Input / LFE Input (See Figure 3A & 3B)

Connect these jacks to the LINE OUT preamp output, LFE output, or subwoofer output jacks
of your receiver/processor. If using the LFE output from your receiver or processor, plug
the single cable into the jack labeled LFE input or, for more signal, use a “Y” connector (not
included) and feed the signal into both “R” and “L” inputs.

Option 1

See Figure 3A)

e 3A: Mono (LFE) Line-Level Connection.

Figur

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SubContractor User’s Manual

5

Option 2

Figure 3B: Stereo Line-Level Connection.

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SubContractor User’s Manual

6

(

11) Balanced XLR LFE Input

This XLR input jack receives the balanced LFE signal from your receiver or processor.

(See Figure 4)

Figure 4: Balanced Line-Level Connection.

(12) Mic Input

Connect the supplied microphone for the Auto-EQ feature to this mini-jack.

(13) IR Input

This is a connection that allows the utilization of a thir
such as Elan or Xantech, or an extended cable for placement closer to your other

emote contr

r

emote control.

r

(14) 12V Trigger

When this 2-conductor mini jack is connected, the amplifier remains in power-off mode until
the trigger is applied. The correct trigger is +12V on the tip of the connector relative to the
grounded sleeve.

(15) RS-232 In

Use this por
explanation of the use of the serial port, available commands, and their formats.

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olled equipment. This keeps you from awkward control angles using the infrared

t to communicate with a touch panel remote control. See Appendix A for an

emote sensor

d par

ty infrar

SubContractor User’s Manual

ed r

,

7

(

16) Auto ON/OFF Switch

Use this switch to select between auto-on active and auto-on inactive (constant on) operation.
F

or maximum amplifier life, we recommend the Auto ON/OFF “Active” setting.

(17) Speaker Level Output Terminals (See Figure 5)

These connections send a crossed-over speaker-level signal to the front speakers. When
connected in this fashion, your satellite speakers will be crossed over at 80 Hz. This
removes the lower bass frequencies from your satellites, enabling them to do a better job
reproducing high frequencies and giving your receiver’s amp more headroom (up to 50%
more power).

You may also connect your satellites directly to your receiver or amplifier along with the
subwoofer if you wish to bypass this crossover.

Figure 5: Speaker-Level Connection.

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SubContractor User’s Manual

8

(

18) Speaker Level Input Terminals

Connect these input terminals to the speaker output terminals of your amplifier or receiver.
I

f you use this method of connection, when you go to the receiver speaker set up menu, make

sure you select the “large” speaker option.

(19) Subwoofer Connection Terminals

Connect these output terminals to the subwoofer(s) being controlled by the SC-1250. Only
connect ONE subwoofer per red/black pair of subwoofer output terminals - DO NOT connect
the subwoofers in a “daisy chain” configuration.

Note: SC series subwoofers are designed so that TWO subwoofers can be driven from a
single SC-1250 amplifier. If you are using the SC-1250 to power a non-SC subwoofer, make
sure you check the resistance of the subwoofer’s voice coil. A SINGLE 4 ohm subwoofer can
be driven with the SC-1250, but not TWO 4 ohm woofers. If you attempt to run more than a
single 4 ohm subwoofer, internal protection circuitry will activate within the SC-1250.

Caution!!!

To avoid damage to your SC-1250, be sure to maintain correct polarity when making all
connections. Red (positive) to red, and black (negative) to black. Be sure that all connections
are tight, and that there are no loose strands or frayed wires.

(See Figure 5)

(20) Power Cord Adaptor

Connect the detachable 117V~60Hz 15A AC power plug to this male interface connection.
The detachable cord allows for easy replacement should the original be damaged.

(21) Fuse

If the unit is not functioning, check the fuse. If the fuse is blown, r
rated fuse. If the fuse blows again, refer the unit for service.

(22) Master Power Switch

Press the POWER switch to the ON position to activate the amplifier. If the unit is to be left
unused for an extended period of time, move this switch to the OFF position to prolong the
life of the amplifier.

eplace with an identically

REAR PANEL CONNECTIONS – DETAILED EXPLANATION

The SC-1250 is equipped with both speaker
“INPUT” jacks when connecting from a pre-amp, signal processor, or line-level crossover. The
“SPEAKER LEVEL INPUT” jacks connect directly to the speaker outputs of an integrated amplifier
or receiver. Your amplifier section will notice no additional loading effects when you use these
inputs because of their high impedance.

-level and line-level inputs. Use the RCA/Phono type

Note: Do not use both the RCA/Phono “INPUT” connections and “SPEAKER LEVEL INPUT”
connections simultaneously.

About Low-Pass Crossovers

All of the SC-1250 inputs sum the left and right channels together and the r
passed through an adjustable low-pass crossover before being amplified. The crossover control
allows you to adjust the upper limit of the subwoofer’s frequency response from 30 to 160 Hz.
The subwoofer’s response will begin rolling off above the frequency you set this control to. The
slope is 24 dB/octave.

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SubContractor User’s Manual

esulting signal is

9

Y

ou should set the crossover frequency to obtain a smooth and seamless transition from the
subwoofer(s) to the main speakers in your system. If your main speakers are smaller units with
l

imited low frequency output, you may wish to choose a higher frequency (such as 100-120 Hz)
than you would with larger speakers which have greater low frequency output. With larger
speakers, you might start with this control set lower, such as 80 Hz. The SC-1250 crossover
has a default of 80 Hz.

Most receivers and processors provide an option to characterize main speakers as “large” or
“small.” This affects the crossover point. We recommend in most cases setting the main
speakers to “small,” despite their size and frequency response characteristics. This is because
the powerful 1250 watt SC-1250 combined with the SC subwoofer(s) you have acquired are
more than likely more suited to low bass reproduction than your amp and main speaker
combination. With the burden of low frequency reproduction relieved, your amplifier and main
speaker combination will enjoy better performance and about 50% more available headroom,
enabling them to more accurately reproduce the rest of the frequency spectrum.

Disabling the Low-Pass Crossover (Subwoofer Direct)

If your receiver/processor provides a crossover to the subwoofer(s), you may want to bypass
the SC-1250’s low-pass crossover. To do this, depress BOTH the Crossover UP and Crossover
DOWN buttons simultaneously. The numeric LED will show indicating that the low-pass

ossover has been defeated. T

cr
UP or cr

ossover DOWN buttons.

o reactivate the low-pass crossover

--

, simply push the crossover

A Word About Your Receiver’s Crossover
and the SC-1250 Crossover

Your V
input when using the built-in crossover. Many home theater processors/receivers (Dolby
Digital®, DTS®, THX™) have a “subwoofer out” jack that performs this same function and are
designed to be used with a power

In these installations, you may want to bypass the crossover in either the processor or the
Velodyne SC-1250 as described above. However, in some cases you may want to use BOTH
cr
subwoofer, 80 Hz processor) for best results.

Note: If not using an external crossover, you should use the built-in crossover for optimal
per
line level input (L/R) is used.

A Word About Interconnect Cables

When installing your Velodyne SC-1250 using the line-level connections, you should always use
high quality shielded interconnect cables. It is recommended that you keep the length of cable
as short as possible to avoid any potential external interference problems.

elodyne SC-1250 amplifier is designed to operate using the full range audio signal for

ed subwoofer.

ossovers. If you choose to do this you should stagger the fr

mance. When using a single RCA sub out fr

for

om the pr

ocessor

equencies, (i.e., 120 Hz

, it does not matter which

When connecting the SC-1250 to your subwoofer(s), use a quality speaker cable that is at least

eful to avoid any loose or frayed strands that could r

14-gauge. Be ver
causing a dangerous condition and possible damage to your unit. Cables of extremely large size

e typically not r

ar
resulting in a poor connection and possible short circuits.

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y car

equired. Extremely large gauge wire may not properly fit in the binding posts,

SubContractor User’s Manual

esult in a shor

t,

10

A Word About Subwoofer Placement

Subwoofers operate at extremely low frequencies, which are primarily omni-directional. Keep in
m

ind that frequency response and output level can be drastically influenced by placement,
depending on the acoustic properties of the listening room. Typically, the optimum location for
a subwoofer is in a front corner of your listening room. This location will usually offer the
greatest output levels and optimum low frequency extension. The worst location for a
subwoofer is typically far away from any walls, close to the center of your room and near an
opening or doorway. Avoid these locations when possible. When using a pair of SC subwoofers
in stereo, it is preferable to place each subwoofer by the satellite of the same channel. Typically,
a minimum distance of one to two feet from your TV to the subwoofer will be adequate to avoid
any magnetic interference.

Remember that the built-in 7 band EQ will help to get the most performance out of your
subwoofer no matter where it is placed.

Caution!

This amplifier has electronics built into the cabinet. Do not place the amplifier next to sources
of heat such as furnace registers, radiators, etc. Likewise, do not place the amplifier near
sources of excessive moisture, such as evaporative coolers, humidifiers, etc. The power cord
should be routed in such a way that it will not be walked on, pinched or compressed in any way
that could result in damaging the insulation or wire.

Selecting the Subwoofer(s) to be Controlled

Your SC-1250 can control a variety of Velodyne SubContractor Series subwoofers as well as generic passive
subwoofers. Special internal software settings are designed to maximize performance and reliability depending
on the model of subwoofer being controlled, so it is important to match the SC-1250 amplifier with the
subwoofer(s) it is controlling. The SC-1250 comes with a default setting for the SC-10 subwoofer. When the
unit is first powered up, the model being controlled is displayed for 2 seconds on the numeric LED before the
display reverts to the volume setting. The subwoofer to be controlled is shown as follows:

Model LED Display

SC-8 8

SC-10 I0

SC-12 I2

SC-15 I5

** - The generic subwoofer setting is for passive subwoofers not on the above list. CAUTION: there is no anti­clipping or anti-distortion protection on this setting.

Model

SC-In-W

SC-In-Floor (SC-IF) IF

SC-In-Ceiling (SC-IC) IC

Generic Subwoofer** GS

all (SC-IW)

LED Display

I

W

To change the subwoofer to be controlled, first power down the amplifier using the power switch on the back
panel (DO NOT use the power button on the fr
the buttons on the front panel (crossover up or down, or volume up or down). The unit will show the model

ently contr

it is cur
the model changes on the LED display. Once the desired model is seen on the LED display, simply release the
button. You don’t need to do anything else - the model to be controlled is automatically stored in the SC-1250’s

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r

olling. T

o change the model, simply push the crossover up or crossover down buttons and

ont panel). Then, tur

n the switch on while depressing any of

SubContractor User’s Manual

11

memory. To exit model selection mode, use the power switch on the back panel to power down and power up
the unit. You should see the model you selected for 2 seconds on the LED display before the display reverts
to the volume.

Using the SC-1250 to Drive Two Subwoofers

Once the model selection process is completed, no other adjustments are needed to enable the SC-1250 to
drive one or two subwoofers.

Usage

This section addresses day-to-day usage of your SC-1250 amplifier.

Remote Control

The features of the SC-1250 remote control are listed below.

• POWER — This button forces your SC-1250 unit into standby

mode. The power LED turns amber, the numeric LED shuts
off, and the amplifier puts out no power. The unit will remain
in this mode until the POWER button is pressed again. To fully
deactivate (i.e. power down) the unit, press the power switch
on the front panel.

Note: The master power switch on rear panel must be on in
order for the front power button to function.

MUTE —

•

amplifier will show 00 if the unit is muted. To unmute the
subwoofer, press the MUTE button again and the original
volume setting shows on the LED.

• EQ — This button automatically EQs the subwoofer using a 7 band internal graphic equalizer.

o use this featur

T
of the subwoofer and place the mic in your preferred listening position. Then, by pressing EQ
on the remote, the subwoofer emits 12 “sweep tones” that cover the frequencies between
20 and 150 Hz. The LED displays “AU” during the Auto-EQ process. After the sweeps are
complete, the unit saves its EQ settings and returns to normal operation. To prevent
accidental invocation of the EQ feature, you must hold down the EQ button for 2-3 seconds
before the EQ sweeps begin.

Note: Each time the EQ feature is utilized, the EQ settings for the SC-1250 are reset. If the
microphone is not plugged in, the SC-1250 will emit one or two sweep tones then cease the
EQ operation. In this case, the previous EQ settings will be preserved.

PHASE —

•

and your listening position. Select the switch position at which you hear the most bass. The
LED will show the phase selected by showing “PH” followed by the phase number

This button mutes the subwoofer

e, first plug the supplied microphone into the Mic-In jack on the back panel

These buttons allow you to optimize the subwoofer per

. The LED on the

Figure 6: SC-1250 Remote.

mance for the location

for

.

• LIGHT — If you wish, you can deactivate the numeric LED on your SC-1250. To do this, press

the LIGHT button on your remote. To reactivate the LED, press the LIGHT button again.

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SubContractor User’s Manual

12

•

NIGHT —Night mode limits the maximum dynamic output of the subwoofer for late night

listening or to be more considerate of close neighbors. Press the night button to turn
t

he night mode feature on or off. Activation of night mode causes “n” to appear briefly on
the display. When night mode is deactivated, the display shows “n off” and then returns to
normal function.

• VOLUME CONTROL — This control allows you to balance the output from the subwoofer to
the main speakers in your system. This control should be set to achieve similar volume level
from between both the main speakers and subwoofer. When pressing volume up or down,
the volume level is shown on the numeric LED on the front panel.

Note: The volume can also be adjusted via the volume buttons on the front panel of the
amplifier. These buttons have the same effect as pressing the up and down volume buttons on
your remote.

• PRESETS — There are 4 presets, consisting of Movies, R&B – Rock, Jazz – Classical, and
Games. As a preset is chosen, the preset is shown on the numeric LED as P1 for preset 1,
P2 for preset 2, etc. The presets provide the following characteristics for bass reproduction:

Movies: Maximum output and impact for explosions and other

action adventure movie content.

R&B – Rock: Provides the driving bass found in today’s rock music.

Jazz – Classical:

Games: Maximum loudness available for the impact of video games.

The tightest, cleanest, lowest distortion bass. The flattest frequency
response of the four presets.

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SubContractor User’s Manual

13

T

he following table indicates musical style and which preset is recommended for it.

MUSICAL STYLE SUGGESTED PRESET

Action Adventure Movies Movies
Country – Rock R&B – Rock
Country – Soft Jazz – Classical
Folk Jazz – Classical
Indie Music R&B – Rock
Pop R&B – Rock
Rock R&B – Rock
Alternative Rock Jazz – Classical
Blues Jazz – Classical
Broadway and Vocalists Jazz – Classical
Children’s Music Jazz – Classical
Christian and Gospel Jazz – Classical
Classic Rock R&B – Rock
Classical Jazz – Classical
Dance and DJ R&B – Rock
Hard Rock/Heavy Metal R&B – Rock
Latin Music R&B – Rock
Miscellaneous
Movies

– Non-Action Adventure
New Age Jazz – Classical
Opera and Vocal Jazz – Classical
R&B
Rap and Hip-Hop
Soundtracks R&B – Rock or Jazz

ideo Games

V

Jazz – Classical
Jazz – Classical

R&B – Rock
R&B – Rock

– Classical
Games

.

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14

E

ach preset has its own characteristics with respect to subsonic filter, volume differential and

a single equalizer (EQ) in order to optimize the listening mode for the preset.

Restoring Defaults

There is a feature that allows you to restore default settings for your SC-1250. By pressing
presets in EXACTLY the following order on the remote, the unit’s power light will blink indicating
that you have restored defaults.

Preset 1: Movies
Preset 2: R&B – Rock
Preset 3: Jazz – Classical
Preset 4: Games
Preset 4: Games
Preset 3: Jazz – Classical
Preset 2: R&B – Rock
Preset 1: Movies

When you press the presets in the above order, the numeric LED will display “P3” indicating that
you have restored defaults. The unit’s volume is reset to level 30 out of 80.

Care of your Amplifier and Subwoofer

Do not use any harsh detergents or chemicals to clean the SC-1250 chassis or the subwoofer
cabinet. Abrasives, deter
chassis or the subwoofer cabinet. We recommend using a damp cloth to clean the front, back
and sides.

During nor
plan to leave the unit unused for an extended period of time, we recommend that you turn off
the unit by the master power switch on the front panel.

mal conditions, the amplifier may be left on continuously without any problems. If you

gents, or cleaning solutions will damage the finish on the SC-1250

.

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15

Troubleshooting and Service

B

efore seeking service for your amplifier or subwoofer, please re-check all systems. Following

is a simple troubleshooting guide to assist you.

1. Verify that the unit is plugged in and power outlet used is active.

2. Is the power switch on?

3. Is the unit receiving an input signal from your source?

4. Have all controls (volume, crossover, phase, etc.) been properly set?

5. If the unit has been running at high levels, one of the protection circuits may be engaged.
Has the amplifier overheated?

6. Has the power button been depressed on the remote?

7. Make sure binding posts are tightened.

8. Is the remote non-responsive? We recommend replacing the batteries in the remote.

If the protection circuitry is active, the unit may cycle on and off until operating parameters
return to normal. Under more serious conditions, the unit may shut off completely. Normal
operation should return upon cooling, but you may be required to turn the power off and then
on again to reset the unit.

The following conditions require service by a qualified technician:

1. The power cord has become damaged

2. The unit does not appear to operate normally or exhibits a marked
change in per

3. The unit has been exposed to water

4. Some part of the chassis or circuitr

formance

y is physically damaged

Thank You for Purchasing an SC-1250 Amplifier!

.

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16

Specifications

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Appendix A: RS-232 Serial Overview and Commands

Introduction

This document outlines Velodyne’s SubContractor (SC) RS-232 protocol specification. This
protocol indicates how SC products receive run
Universal Remote Controls.

Com Port Setup

Use standard communications settings: Baud Rate: 9600, Data Bits: 8, Parity: None, Stop
Bits: 1

SC IN and OUT Port Pin Configuration

SC serial ports use a standard configuration that allows direct connection to a PC via a FEMALE
to MALE serial cable. It uses only three pins (Transmit, Receive, Ground).

The pin configurations are:

IN: Pin 2 = Transmit

Pin 3 = Receive
Pin 5 = Ground

-time commands from devices such as Creston

OUT: Pin 2 = Receive

Pin 3 = Transmit
Pin 5 = Ground

Runtime Command Format

Byte Number

0 ‘#’

1 to 3 or 4 Command and 3 to 4 ASCII characters see formats below

4 or 5

Byte Description Notes

Header Character

Parameter Data Case sensitive

mination Character (r

er

‘$’

T
command is ignored)

- CAPS ONLY!

equir

ed or

.

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18

R

S232 Commands

Activity Command Acceptable Example(s) Comments

Format n Values

Volume Control #VOnn$, 00 – 80 #VO25$, Sets volume to a value,

#VO+$, #VO+$, increments volume up
#VO-$, #VO-$, or down, or requests
#VO?$ #VO?$ current volume setting

Preset Control #PSn$, 1, 2, 3, 4 #PS1$, #PS2$, Activates the indicated

#PS?$ #PS3$, #PS4$, preset, or requests

#PS?$ the current preset

Logo Light #LTn$, 0: Light Off #LT0$ Turns the Logo Light
Control #LT?$ 1: Light On #LT1$ on or off, or requests

#LT?$ light state

Night Mode #NMn$, 0: Night #NM0$ Activates/Deactivates
Control #NM?$ Mode Off #NM1$ Night Mode, or

1: Night
Mode On mode state

#NM?$ requests light

Mute Control #MUn$, 0: Mute Off #MU1$ Mutes/Unmutes the

#MU?$ 1: Mute On #MU?$ woofer, or requests
#MU0$

Power Control #JUn$, 0: Power Off #JU0$ Powers On/Powers

#JU?$ 1: Power On

#JU1$
#JU?$ requests power state

mute state

Off the woofer, or

.

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Velodyne Products

115 - 120V

®

D

D Series

DD-10
DD-12
DD-15
DD-18

Digital Drive 1812

Signature Edition

DEQ-R Series

DEQ-8R
DEQ-10R
DEQ-12R
DEQ-15R

DLS™-R Series

MiniVee

MiniVee®10

Optimum Series

Optimum-8
Optimum-10
Optimum-12

SMS™-1

SubContractor™

Series

SC-1250

SC-10
SC-12

®

220 - 240V

®

DD Series

DD-10
DD-12
DD-15
DD-18

Digital Drive 1812

Signature Edition

CHT-Q Series

CHT-8Q
CHT-10Q
CHT-12Q
CHT-15Q

Impact Series

SPLi Series

SPL-800i

SPL-1000i

SPL-Ultra Series

SPL-800 Ultra
SPL-1000 Ultra
SPL-1200 Ultra

SubContractor™

Series

SC-1250

SC-10
SC-12

SC-15
DLS -3500R
DLS -3750R
DLS -4000R
DLS -5000R

Impact Series

Impact -Mini

Impact -10
Impact -12

MicroVee™

SC-15
SC-IW

SC-IF/IC
SC-600 Amp
SC-602 Amp

SC-600 IW

SC-600 IF/IC

VX-11

Impact -Mini

Impact -10
Impact -12

MicroVee™

SMS™ -1

SC-IW

SC-IF/IC
SC-600 Amp
SC-602 Amp

SC-600 IW

SC-600 IF/IC

.

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SubContractor User’s Manual

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LIMITED WARRANTY - U.S. AND CANADA ONLY

VELODYNE ACOUSTICS, Inc. (“VELODYNE”) warrants all electronics for a period of three years, drivers for a period
of five years, and full range speakers for a period of five years. All VELODYNE products have a warranty from the
date of purchase against defects in materials and workmanship subject to the following conditions:

1. VELODYNE is not responsible for defects which result from the use of an amplifier or controller other than
the one originally supplied with the unit (subwoofer) or defects which result from modifications or repairs
made by any component of the system by anyone other than a VELODYNE factory authorized
service representative.

2. This warranty is void if any repairs or service covered by the terms of this warranty are made to any
component of the system by anyone other than a VELODYNE factory authorized service representative.

3. VELODYNE is not responsible for damage caused by accidents, abuse, misuse, natural or personal disaster
or unauthorized modification. The VELODYNE products are not intended for professional or commercial use
and VELODYNE is not responsible for damage resulting from such use.

4. The VELODYNE product warranty is limited to units that are purchased from authorized VELODYNE dealers
and finalized within authorized dealer locations.

5. This warranty is nontransferable under any condition.

6. Use of this product outside the U.S. and Canada voids this warranty.

TO OBTAIN SERVICE

Information regarding service may be obtained from the dealer from whom you purchased the unit, or by contacting
VELODYNE customer service. Warranty service must be performed by a VELODYNE factory authorized service
representative within the warranty period set forth above. If VELODYNE determines the unit is defective, VELODYNE
will, at VELODYNE’s option, repair or replace the product at no charge if the product is forwarded prepaid to a factory
authorized service representative. Products forwarded to the factory authorized service representative should be
shipped securely and properly packaged, insured and freight prepaid.

WARRANTY OUTSIDE THE UNITED STATES AND CANADA

The Warranty of this product if it is sold to a consumer outside of the United States or Canada shall comply with
applicable law and shall be the sole responsibility of the distributor that supplied this product. To obtain any applicable
warranty service, please contact the dealer from which you purchased this product, or the distributor that supplied
this product.

Velodyne Acoustics, Inc.

345 Digital Drive

gan Hill, CA 95037

Mor

408.465.2800 voice

408.779.9227 fax

408.779.9208 service fax

63-SC1250 RevD JUN 2010

.

www.velodyne.com

Service E

Product E

echnical E

T

www.velodyne.com

-mail: [e-mail]

-mail: [e-mail]

-mail: [e-mail]

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