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I would like to know what would be a good high end integrated stereo receiver amplifier, or a few to look at. It needs to run a whole house audio system that has 12 sets of speakers. The speakers are all 8 OHM's, but I want a real good powerful amp to power the system so as to not tax the amp and risk blowing the circuits which happened in the past. Music source would be CD, Satteliete and IPORT. Thank you for any assistance. Pat

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  • Pat Jul 21, 2009

    Good Idea...Thanks

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Hi I am Vortash you dont say what wattage the speakers you have in your home are , or if the speakers are wired in paralel or series .
As you can appreciate a series system will decrease the Wattage required but increase the ohms of the system as you will have a total of 96 ohms per channel in series and in a paralel connection , the Ohmage will be reduced by each speaker attatched ex 8ohm becomes 4 ohm etc as per Ohms law and the bridging of two resistances , if you haven't taken this into consideration then this may be why you are blowing the amps you have been using .. Audio systems are one of the most missconcepted sysytems there is as the layman thinks all he has to do is put a bigger amp on and he gets more sound .. sorry to say this is untrue it requires balance .
I dont mean to sound condescending but I have attended to hundreds of systems that have been damaged as a result of this oversight and dont wish you to fall at the same hurdle .. If you want a supreme system then you will have to match the Speakers to the system and not Visa versa as they are already installed .. Most theater systems are designed specifically with the speaker system they come with and adding to them only overdrives the amp and eventually leads to burn out ..
Your best bet is to go to an audio department of choice and take with you all details of your speaker system .. how wired distance of cable run etc ( as the longer the cable the more resistance ) and a engineer would be able to work out exactly what you require and probably save you loads of dosh in buying the wrong one and having to either have it repaired or replaced ,and if the system did fail then you would have recourse to get repair or your money back .. as it would have been designed and recomended by them for your specific needs .. Hope this helps and i have not waffled on too much lol Regards vortash

Posted on Jul 21, 2009

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Any 2-channel (or greater) receiver or integrated amp with at least one Tape Monitor loop; or any separate amplifier - will work. I would look fror one with true > 100 watts per channel, all channels driven, 20-20000kz + a few dB, with less than 0.5% Total Harmonic Distortion (in other words clean and powerful) should suffice. Specific brands don't matter. I'm partial to old Carver amps.

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However, should you get a multi-channel amp for the 901's you will be limited to using only 901's on it as the required Active Equalizer would affect all speakers attached to the amp, and conventional speakers would not sound right and could possibly be harmed by it's drastically-altered frequency response. Since using the Tape Monitor on modern DSP Receivers disables their digital inputs, that would limit what you could listen to, should you later decide to go with Cable Box, DVD, SACD, DVD-Audio, Blu-Ray, DTS etc.

* There are no some multichannel receivers out there that allow separating the preamp-amp circuitry for each channel to allow for differences in speaker processing. I think Marantz had one.

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In that case a separate stereo amp for the 901's would work. I run a Carver AV-406 (5-channel amp) for my 901's in Front, 2 Subwoofers and the Rear Surround channel, with the Active EQ between the receiver Front L&R Outputs and the 901's amp channels. My receiver controls everything and just drives the Center and Surround speakers.

You could get by with just a stereo amp for the 901's. A Carver M-200 is a good efficient amplifier that would have you cooking just fine (2x100W). Run it with the Active EQ between the receiver Front L&R Pre-Outputs ** and the 901's amp channels.

** Front Pre Out (or one of your analog Tape Outs) >>> Bose EQ Amplifer IN, then
Bose EQ Amplier OUT >>> new amplifier IN.


Attach the 901's to the new amp, set its volume to Max and run through your receiver's speaker level setup.

Write off the Tape Out as an input if you use it to extract the Front L&R channels. DO NOT monitor it or you'll chop the 901's out of the signal path AND kill any digital source audio in the receiver.

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