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Wireless speakers I want to run a pair of wireless speakers and conventional speakers from one amplifier, and be able too switch either on or off or both on, preferbally with a volume control on the conventional pair. I have tried a bandbridge switch box but due to internal restistors it will not allow both speakers together. Any help please. Regards G Wood

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  • George Wood Apr 28, 2008

    Amplifier is a sharp music centre CD-BK270W
    Speakers are one pair duel port speakers and one sterio wireless transmitter,
    Transmission 863MHz FM, S/N ratio55db(a)
    Frequency response 30Hz 18KHz.
    Thats all the info I have.
    Regards
    Beechcourt

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  • Master
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Hi,

What model amp and speakers are you using?

Posted on Apr 28, 2008

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Possibly lack of ventilation or excessive volume through difficult speaker loads.

http://media.onecall.com/Image_Products/Harman%20Kardon/harman-kardon-hk990.pdf

See page 6.

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How do you connect a nad c270 amp to the bose 901 series vi equlizer and system/


Bear in mind that 901's require exclusive use of any amplifier they use. You shouldn't expect to use conventional speakers alongside them on the same amp. The reason is that the 901's require the use of their dedicated Active Equalizer to shape the frequency spectrun to match their drivers' response curves, resulting in a flat sound output. Applying that kind of equalization to any conventional speakers will sound to sharp at the extremes and may even potentially damage them.

For connection I would run a pair of RCA cables from the L&R Audio Line OUT of whatever preamp or source you're using to the Active EQ's Line IN; then the EQ's Line OUT to a NAD amp's Line IN. DEselect any Tape options on the Active EQ, attach the 901's to the new amp, set the NAD volume controls pretty high (and leave them alone), run through any level setup procedures in your control electronics for volume, etc and you're done.

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I have bose 901 with a rotel receiver im still not getting the sound i want will a power amp help get that surrond sound im looking for


The use of 901's in any digital AV receiver setup for anything EXCEPT STEREO listening through the 901's alone requires you to have a separate amplifier for them and to avoid having to use a Tape Monitor.

That is because if you activate any Tape Monitor circuit at all, you will kill any digital sources. That is a function of AV receivers in general, nothing to do with 901's. However, you can still draw the Front Left and Right signals out of any Pre-Out (with a Y-cable set, looping the Pre Out directly back to the Main In) or Tape Out jacks (remembering to NEVER activate that monitor on the receiver), go into the Active EQ's Amplifier Connections; then Out of the EQ's Amplifier Connection to a separate amp and attach the 901's to that amp. This way you won't introduce proprietary and potentially damaging Active Equalization back into anything in the AV Receiver with its conventional speakers.

Get yourself a nice separate amp, draw the Front L&R pre-out signals from wherever you can find them. On many, there is a pre-amp out for every channel in case you want to run external amps for any channels. That is how my old Pioneer VSX-36TX is equipped. For others, you may have to borrow the signals from a typical Tape- or Adapter-Out RCA pair. Just remember, AV receivers disable digital inputs as soon as you switch in a Tape Monitor, so choose one you won't have to switch IN. The signal Out is always there regardless of the monitor state.

The AV Receiver can still drive the Center, Surrounds and the Sub(s) as it is designed. This is how mine is wired.

Come to think of it, you could still have conventional Front L&R speakers on the AV Receiver, but why? Maybe one would prefer the 901's for music and some other speakers for surround. Level matching with the 901's to conventional front speakers would only be possible if the separate amp has its own volume, but it would work. Maybe I'll try it someday. None of my current amps has a volume control.

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1 Answer

Which home theater recivers are compatiable with the 901 equalizer and speakers?


The use of 901's in any digital AV receiver setup for anything EXCEPT STEREO listening through the 901's alone requires you to have a separate amplifier for them and to avoid having to use a Tape Monitor.

That is because if you activate any Tape Monitor circuit at all, you will kill any digital sources. That is a function of AV receivers in general, nothing to do with 901's. However, you can still draw the Front Left and Right signals out of any Pre-Out (with a Y-cable set, looping the Pre Out directly back to the Main In) or Tape Out jacks (remembering to NEVER activate that monitor on the receiver), go into the Active EQ's Amplifier Connections; then Out of the EQ's Amplifier Connection to a separate amp and attach the 901's to that amp. This way you won't introduce proprietary and potentially damaging Active Equalization back into anything in the AV Receiver with its conventional speakers.

Get yourself a nice separate amp, draw the Front L&R pre-out signals from wherever you can find them. On many, there is a pre-amp out for every channel in case you want to run external amps for any channels. That is how my old Pioneer VSX-36TX is equipped. For others, you may have to borrow the signals from a typical Tape- or Adapter-Out RCA pair. Just remember, AV receivers disable digital inputs as soon as you switch in a Tape Monitor, so choose one you won't have to switch IN. The signal Out is always there regardless of the monitor state.

The AV Receiver can still drive the Center, Surrounds and the Sub(s) as it is designed. This is how mine is wired.

Come to think of it, you could still have conventional Front L&R speakers on the AV Receiver, but why? Maybe one would prefer the 901's for music and some other speakers for surround. Level matching with the 901's to conventional front speakers would only be possible if the separate amp has its own volume, but it would work. Maybe I'll try it someday. None of my current amps has a volume control.

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The use of 901's in any digital AV receiver setup for anything EXCEPT STEREO listening through the 901's alone requires you to have a separate amplifier for them and to avoid having to use a Tape Monitor.

That is because if you activate any Tape Monitor circuit at all, you will kill any digital sources. That is a function of AV receivers in general, nothing to do with 901's. However, you can still draw the Front Left and Right signals out of any Pre-Out (with a Y-cable set, looping the Pre Out directly back to the Main In) or Tape Out jacks (remembering to NEVER activate that monitor on the receiver), go into the Active EQ's Amplifier Connections; then Out of the EQ's Amplifier Connection to a separate amp and attach the 901's to that amp. This way you won't introduce proprietary and potentially damaging Active Equalization back into anything in the AV Receiver with its conventional speakers.

Get yourself a nice separate amp, draw the Front L&R pre-out signals from wherever you can find them. On many, there is a pre-amp out for every channel in case you want to run external amps for any channels. That is how my old Pioneer VSX-36TX is equipped. For others, you may have to borrow the signals from a typical Tape- or Adapter-Out RCA pair. Just remember, AV receivers disable digital inputs as soon as you switch in a Tape Monitor, so choose one you won't have to switch IN. The signal Out is always there regardless of the monitor state.

The AV Receiver can still drive the Center, Surrounds and the Sub(s) as it is designed. This is how mine is wired.

Come to think of it, you could still have conventional Front L&R speakers on the AV Receiver, but why? Maybe one would prefer the 901's for music and some other speakers for surround. Level matching with the 901's to conventional front speakers would only be possible if the separate amp has its own volume, but it would work. Maybe I'll try it someday. None of my current amps has a volume control.

Get yourself a nice separate amp, draw the Front L&R pre-out signals from wherever you can find them. On many, there is a pre-amp out for every channel in case you want to run external amps for any channels. That is how my old Pioneer VSX-36TX is equipped. For others, you may have to borrow the signals from a typical Tape- or Adapter-Out RCA pair. Just remember, AV receivers disable digital inputs as soon as you switch in a Tape Monitor, so choose one you won't have to switch IN. The signal Out is always there regardless of the monitor state.

The AV Receiver can still drive the Center, Surrounds and the Sub(s) as it is designed. This is how mine is wired.

Come to think of it, you could still have conventional Front L&R speakers on the AV Receiver, but why? Maybe one would prefer the 901's for music and some other speakers for surround. Level matching with the 901's to conventional front speakers would only be possible if the separate amp has its own volume, but it would work. Maybe I'll try it someday. None of my current amps has a volume control.

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By all-in-one amplifier that handles the surround I think you mean all-in-one receiver or preamp. Amps are just big dumb muscular power supplies for speakers.

The source control and digital decoding could be handled by a modern AV receiver with multichannel analog outputs for driving separate amps or you could get a digital AV preamplifier/control unit functionally like this Adcom. Prepare for sticker shock.

http://hdtvdreams.com/Adcom-GTP-870HD-7.1-Multi-Channel-Processor/Preamplifier-GTP870HD.aspx

Understand that EACH PAIR of Bose 901's will require its own DEDICATED two channels of amplification AND someplace to jack in its Active Equalizer - between the line level source and the power amp.

Conventional speakers can probably run off the receiver's amplifiers since they don't/can't/must not have the Bose Active EQ in line with them.

Having a single pair of 901's plus a passive subwoofer or two in the same room for accurate 6- or 7.1 surround would require at least four stereo amps or some combination that adds up to 8 channels.

In my own system I have a Pioneer VSX-36TX Receiver (with 5 potential channels of amplification for Left, Right, Center, two Surrounds) doing light duty as the control and routing center but ONLY driving the Center (two Kenwood 777's) and Surround speakers (Bose 301's). I have a Carver 5-channel amp pushing the Bose 901 Front speakers (100Wx2), two dbx Subwoofers (110Wx1) and the Bose 301 Rear Surround speakers (60Wx1).

You could probably get by with a powerful 2-, 3- or 4-channel amplifier to push the 901's and subwoofer(s) as I did. It's the cheapest way out if you get a decent AV receiver. Once you set up the levels and delays the receiver does all the thinking and controlling for you.

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