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Summary of Contents for HTD MA-1235
- Page 1 M A - 1 2 3 5 & M A - 1 2 6 5 1 2 - C h a n n e l A m p l i f i e r O w n e r’s M a n u a l Home Theater Direct, Inc. ww.htd.com Expert Support: 866-HTD-AUDIO (483-2834) info@htd.com...
- Page 2 The appliance should be serviced by qualified personnel when: not interfere with its proper ventilation. For example, the appliance a) the power supply cord or the plug has been damaged b) objects have fallen, or liquid spilled into the appliance should not be situated on a bed, sofa, rug, or similar surface that c) the appliance has been exposed to rain may block the ventilation openings. Never place the appliance in d) the appliance does not appear to operate normally or exhib- a confined space such as a bookcase, or built-in cabinet, unless its a marked change in performance or proper ventilation is provided. e) the appliance has been dropped, or the enclosure damaged Heat Servicing The appliance should be situated away from heat sources such as The user should not attempt to service the appliance beyond that radiators, heat registers, stoves, or other appliances that produce heat. Position the appliance at least 5” away from any heat-produc- described in the operating instructions. All other servicing should ing equipment, including other HTD amplifiers. be referred to qualified service personnel. Product Servicing Power Sources The appliance should be connected to a power supply only of the If your system fails to operate properly, please contact HTD type described in the operating instructions or as marked on the ap- directly for further assistance at 1-866-483-2834. pliance. Additional information, including detailed specifications for each model, can be found on our website, www.htd.com. Thanks Grounding or Polarization again for choosing Home Theater Direct! Precautions should be taken so that the grounding or polarization means of an appliance is not defeated. Warranty: The MA-1235/MA-1265 carries a two-year parts and labor warranty. Should your MA-1235/MA-1265 fail to operate properly at any time during the warranty period, HTD will repair or replace (at our option) the item barring any indication of misuse or abuse. Freight to an HTD authorized facility is paid by the customer. Return freight is paid by HTD. Warranty registration occurred automatically at the time your order was placed. There is no need to complete or mail in additional paperwork. Prior to returning any item, please call 1-866-483-2834 to receive a Return Authorization number.
- Page 3 Thank you for giving Home Theater Direct the chance to win your business! We are confident you will find that HTD offers an outstanding combination of performance and value in everything we make. To ensure you get the most out of your new amplifier, please take a moment to read this manual before you get started. Should you lose this manual, you can always download or print a copy from www.htd.com. The MA-1235 (MA-1265) is a 12-channel, multi-use, multi-zone power amplifier that is flexible and powerful enough to amplify every speaker in your whole-house audio system and/or home theater system. This amplifier delivers exceptionally accurate sound and is designed to deliver trouble-free performance for many years to come. Each channel delivers 35 watts RMS (65 watts RMS for MA-1265) into 8 ohms and 50 watts RMS (100 watts RMS for MA-1265) into 4 ohms with all channels driven. In addition, you can choose to bridge adjacent channels (eg. 1 and 2) to create a single 100 watt RMS (150 watts RMS for MA-1265) channel. This allows for a multitude of set-up options for virtually any application that requires multiple discreet channels of amplification. This owner’s manual is designed to get you quickly up and running with your new system. Should you have any questions, we are available by phone, toll free 866-HTD-AUDIO (866-483-2834) M-F 8am-6pm, and by email at info@htd.com. eneral uidelines Please read the following warnings and tips before hooking up your MA-1235/MA-1265: - Never connect speaker wire or line level connections with the front power button in the ON (in) position. Always make your connections with the amplifier OFF. - Only use the detachable power cord supplied with your MA-1235/MA-1265. It is a 3-prong, grounded power cord. - Never disable the ground wire in the power cord. This is for your protection. - Never plug the MA-1235/MA-1265 into the back of another electrical component. - We highly recommend plugging the MA-1235/MA-1265 into a power tree with adequate surge protection. - Dual banana plugs (sold separately) will fit the speaker connections in each individual channel, but will not fit across the ...
- Page 4 1/8” Input trigger jack - Turns the Bridge switch solid connections with speaker cable. MA-1235/MA-1265 ON from another Move this switch to the right to “bridge” adjacent component. channels. The controls for the Even-Numbered channels (2,4,6,8,10,12) take over in bridged mode.
- Page 5 Gold-Plated Connections: All line level inputs, outputs and speaker connections are gold-plated for clear signal transfer. Multiple Inputs: Any audio component with a stereo analog RCA-type output can be connected to the MA-1235/ MA-1265.Two stereo line level inputs (In 1 and In 2) are available to every channel. Plus, every channel has its own dedicated input (Line In). In addition, you can choose to power either the left (L) or right (R) input, or select a summation of the left and right (L+R). This provides incredible flexibility for selecting which signal to amplify through the speaker(s) connected to each channel. Stereo Outputs: Two stereo line level outputs (Out 1 and Out 2) are provided to allow the stereo input signals (In 1 and In 2) to be passed on to additional equipment as needed. Power-On Modes: The MA-1235/MA-1265 can be turned on automatically when an input signal or voltage trigger is sensed. You can alternatively leave the MA-1235/MA-1265 in always-on mode. An output voltage trigger is also available for activating other components as the MA-1235/MA-1265 is turned on. Level Settings: Each channel has its own adjustable Level knob. Use this knob to set the maximum output level for each channel. This feature allows you to easily balance the output volume throughout your home. Best practice: When using separate volume controls or keypads to locally control volume level within a zone, start with the Level setting at the 12:00 position (turned about half-way up). Next, set the volume level on your rotary vol- ume control (sold separately) or digital keypad (sold separately) to its maximum setting for the speaker(s) connect- ed to that channel/zone. Then slowly turn up the Level knob on the back of the MA-1235/MA-1265 until the desired maximum volume level is achieved. This is most easily accomplished with the assistance of a second person. It is acceptable to turn the Level knob to its maximum setting but you can extend the life of the component by only utiliz- ing as much power as necessary. Speaker Connections: Speakers are connected directly to the amplifier using speaker cable. For all behind-the- wall installations, CL3-rated cable is recommended to comply with most building-codes. Speaker cable can be con- nected to the 5-way binding posts using bare wire, dual or single banana plugs, spade connectors or pins. Be sure to maintain polarity (Speaker + to Amplifier +, Speaker - to Amplifier -). Speaker Connection Examples Banana Plug Bare Wire Bare Wire - Bridged Mode Make sure binding posts are tight- Rotate binding post counter-clockwise to reveal When bridging two side-by-side channels post. Strip back 3/8” insulation from cable. Tightly ened then push in banana plug the top binding post from the odd-num- twist copper wires and wrap around post as shown.
- Page 6 Connect and Use the MA-1235/Ma-1265 Example One: Connecting the Amplifier to an advanced whole-house audio controller, such as the HTD MC-86 Use the Line Outputs on the MC-86 to connect to the Line Inputs on the amplifiers for each zone. We include six 3’ shielded stereo patch cables with the MC-86 for this purpose. 3’ Shielded Stereo Patch Cables Right Right Left Right Left Left Right Left Left Left Right Right Right Left Speaker Connections Amplifier Settings Two side-by-side amplifiers are used for each zone. One side is set to amplify the Right channel of a stereo signal and the other side is set to amplify the Left side of a stereo signal. In our diagram, channel 1 is set to amplify the Right channel and channel 2 is set to amplify the Left channel for the speakers in Zone 1. Level: Turn the rotary Level knob all the way clockwise to get the maximum power out of the ampli- fier. You can set the Level at less than maximum to limit the volume output in a zone (e.g. limit how loud a child can play his/her music). See “Best Practices” under Level Settings on Page 4 for more information. Input Selection Switch: Set to “Line”. L, L+R, R Switch: When the “Line” input is used, this switch is inactive so the setting is irrelevant. However, you might want to set odd numbered channels to Right (R) and even channels to Left (L) just to make it easier to recall which Line Output from the MC-86 is being sent to each channel. Bridge Switch: Since you are not bridging the two channels, make sure the Bridge Switch is off (far ...
- Page 7 Connect and Use the MA-1235/MA-1265 Example Two: Connecting the Amplifier to a home theater receiver or stereo receiver/component Use the stereo pre-amp or auxilary outputs on your receiver and/or component to connect to input 1 (In 1) and/or input 2 (In 2) and/or the dedicated Line Inputs on each channel of the MA-1235/MA-1265. Home Theater or Stereo Receiver Audio-Video Sources Optical or Digital Coax SAT Optical or VCR in DVD Optical or Digital Coax Digital Coax RCA Output Line Out * * Auxilary output, pre-amp output,...
- Page 8 Specifications: MA-1235 MA-1265 Channels of Amplification: 12 (6 stereo) 8 ohms RMS Watts Per Channel (all channels driven) 4 ohms RMS Watts Per Channel (all channels driven) Adjacent Channels Bridged @ 8 ohms RMS Watts Per Channel Total Harmonic Distortion (THD) 20 Hz - 20 kHz .04% .04% 8 ohms .06% .06% 4 ohms Adjacent Channels Bridged 8 ohms .09% .09% Dimensions (HxWxD) 5.75” x 17” x 17.5” 7” x 17” x 17.5” Net Weight 49 lbs. 55 lbs. Home Theater Direct, Inc. www.htd.com Expert Support: Toll free: 866-HTD-AUDIO (483-2834) info@htd.com...
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