Big Bang SpeakerCraft ® Power Amplifiers BB1235 O w n e r ’s M a n u a l
Thank you for purchasing the SpeakerCraft BB1235 power amplifier. The BB1235 contains the excellent performance and reliability that SpeakerCraft products have been recognized for. The BB1235 features the flexibility needed for demanding custom installation applications. It is ideal for use in home theater, stereo, multi-room, multizone and commercial applications. For best performance, please carefully read the instructions in this manual.
Diagram 1 - Front Panel Active LED indicates that the amplifier is working. Master power switch. Turns off power to amplifier and Power Mode Circuitry. 3 Protection LEDs indicate that either a fault in the wiring, the speaker, or the amplifier has caused the amplifier to shut down.
Diagram 2 - Rear Panel Main bus inputs allow outputs from receivers, CD players, TVs, or any stereo audio sources to be amplified across all channels for easy multiroom applications. Auxiliary inputs allow an additional audio source to be played on any channel that is switched to AUX. Bus outputs allow the bus inputs to be sent to other amplifiers or a daisy chain without the need for ‘Y’ cables or splitters. Auxiliary outputs allow you to daisy chain the input to other audio sources.
SYSTEM DESIGN & OPERATION CONSIDERATIONS To best understand system design and operation of the BB1235 it is useful to understand the following terms and features as they relate to the BB1235. Bus Input Allows the signal from a source to be distributed to any of the 12 channels on the amplifier. Auxiliary Inputs Multi-Room A system design that plays the same source at the same time in all rooms. If a change is made in one room, the same change takes place in all other rooms.
SYSTEM DESIGN EXAMPLES There are many ways to configure the BB1235 amplifier. The following pages contain some typical installation examples. Use these examples to generate ideas for your system design. Multi-Room Installation Example (Diagram 4) This illustrates the simplest use of the BB1235, distributing audio throughout the home. In this example only one source can be selected at a time, all pairs of speakers have the same audio signal available.
Diagram 4 - Multi-Room Installation AUDIO SOURCES OUTPUT PREAMPLIFIER / RECEIVER DVD INPUT L R OUTPUT L TAPE INPUT L R CD Player R CD INPUT L R OUTPUT L L Tape Deck R R OUTPUT L DVD Player R Room 1 Room 2 VOLUME CONTROL LEFT SPEAKER RIGHT SPEAKER Room 3 VOLUME CONTROL LEFT SPEAKER 11 RIGHT SPEAKER Room 4 VOLUME CONTROL LEFT SPEAKER RIGHT SPEAKER Room 5 VOLUME CONTROL LEFT SPEAKER RIGHT SPEAKER Room 6 VOLUME CONTROL LEFT SPEAKER RIGHT SPEAKER 12 VOLUME CONTROL LEFT SP
Diagram 5 - Multi-Zone Installation #1 SOURCES OUTPUT OUTPU PREAMPLIFIER / RECEIVER OUTPUT AUX INPUT L R L DVD INPUT L R TAPE INPUT L R CD Player #1 R CD INPUT L R OUTPUT OUTPU L L Tape Deck R R OUTPUT OUTPU L CD Player #2 DVD Player R OUTPUT L R VOLUME CONTROL LEFT SPEAKER RIGHT SPEAKER VOLUME CONTROL LEFT SPEAKER RIGHT SPEAKER VOLUME CONTROL LEFT SPEAKER RIGHT SPEAKER VOLUME CONTROL LEFT SPEAKER RIGHT SPEAKER VOLUME CONTROL LEFT SPEAKER VOLUME CONTROL RIGHT SPEAKER ZONE
Diagram 6 - Multi-Zone Installation #2 DVD Player CD Player OUTPUT AUDIO SOURCES L L L R R R RIGHT SPEAKER 15 OUTPUT R VOLUME CONTROL ZONE 1 OUTPUT L 6 STEREO PREAMPLIFIERS OR MULTIZONE PREAMPLIFIER LEFT SPEAKER Tape Deck Tuner OUTPUT ZONE 1 OUTPUT L R VOLUME CONTROL LEFT SPEAKER RIGHT SPEAKER ZONE 2 CD INPUT DVD VD INPUT PUT ZONE 2 OUTPUT L R ZONE NE 3 OUTPUT TPUT L R VOLUME CONTROL LEFT SPEAKER RIGHT SPEAKER PEAKER ZONE 3 TUNER INPUT TAPE INPUT ZONE 4 OUTPUT L R ZONE
Diagram 7 - Home Theater/Multi-Room Installation SOURCES OUTPUT L HOME THEATER RECEIVER SPEAKER OUTPUTS LEFT CENTER RIGHT SUBWOOFER OUTPUT REAR LEFT REAR RIGHT MULTI-ROOM OUTPUT L R VCR INPUT L R DVD INPUT L R CD Player R CD INPUT L R OUTPUT L DVD Player R OUTPUT L VCR R LEFT SPEAKER REAR LEFT SPEAKER CENTER SPEAKER SUBWOOFER RIGHT SPEAKER REAR RIGHT SPEAKER Room 1 Room 2 VOLUME CONTROL LEFT SPEAKER 17 RIGHT SPEAKER Room 3 VOLUME CONTROL LEFT SPEAKER RIGHT SPEAKER Room 4 V
Diagram 8 - Home Theater Installation SOURCES OUTPUT L HOME THEATER RECEIVER / PROCESSOR SUBWOOFER OUTPUT LEFT CENTER RIGHT REAR LEFT REAR RIGHT R VCR UT INPUT R L DVD INPUT L R CD Player R CD INPUT L R OUTPUT CHANNEL OUTPUTS L DVD Player R OUTPUT L VCR R LEFT SPEAKER CENTER SPEAKER RIGHT SPEAKER VOLUME CONTROL REAR LEFT SPEAKER SUBWOOFER REAR RIGHT SPEAKER 19 LEFT SPEAKER 20 RIGHT SPEAKER
INSTALLATION CONSIDERATIONS INSTALLATION Placement CAUTION: All connections and switching must be done with the amplifier’s master power switch positioned to “off”. DO: • Place the amplifier with the feet resting on a solid flat level surface. • Place the amplifier in a well-vented area to provide proper cooling. In areas that lack proper ventilation, such as tight cabinets or racks, it may be necessary to install small fans to create air movement.
Selecting Inputs (See Diagrams 9 & 10) Each channel is capable of delivering the source from many inputs. The three main inputs are BUS, AUX and LINE IN. The selection for these inputs is done via the Input Selection switch, marked “BUS-AUX-LINE”. To select a source for each channel, follow the steps below: 1. Select the desired source input.
Control Output Connecting the Line Level Audio Inputs The 12V output jack on the back of the amplifier can be used to turn on a variety of components equipped to be activated when they receive a 12V DC output. Voltage is only delivered to the jack when the amplifier is “on” or active. When the amplifier turns off, the voltage ceases. CAUTION: Only make connections when the amplifier is turned off.
TROUBLESHOOTING The Problem Possible Causes And Solutions The amplifier is designed to function trouble-free. Most problems occur because of operating errors. If you have a problem please check the troubleshooting list first. If the problem persists, contact your authorized SpeakerCraft dealer or SpeakerCraft customer service at (800) 448-0976. No sound is heard on one or some channels. (Continued) The level adjustment on the channel is turned all the way down. Turn it clockwise to raise the volume.
SPECIFICATIONS BB1235 WARRANTY Power Output: 35 Watts per channel RMS at 8 ohms (all channels driven) Limited Two-Year Warranty Input Sensitivity: 500mv for 8 ohm rated output Input Impedance: 15K ohms Total Harmonic Distortion: .06% 20Hz to 20kHz @ 8 ohms (all channels driven) SpeakerCraft Inc.
940 Columbia Ave., Riverside CA 92507-4492 (800) 448-0976 Fax (951) 787-8747 www.speakercraft.
