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Bose 901 Active EQ Loop

I am hooking up a bose 901 active EQ, I want to use it with my BSR EQ and my DBX Range expander. Right now i have the bose EQ hooked up last ( preamp out- Bsr EQ- DBX expander- Bose EQ- pre amp in) Is this correct or is there a better way. Should I put the bose eq first in the loop? I am not using the tape loop at all on the back of the bose eq.

Thanks in advance
Marc

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There's good news and bad news. The bad news is that a multichannel receiver with Bose 901's will only sound right in STEREO on stereo analog material. For one thing, the other speakers around the room are not designed to recieve its Active Equalization and for another, if you engage your Tape Monitor you will not be able to play digital sources. Tape Monitor is for analog stereo material only and on my receiver it disables any digital inputs.

The good news. I have a setup similar to what I think you're trying to do and it works great!

A separate stereo amp for the 901's was my solution. 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 the dbx and BSR in tandem with each through the tape monitor loop on the receiver but be advised you can only use them on analog source stero material. However, you can still employ the various DSP options to spread the sound around the room.

At my PC workstation across the room I have a stack of analog processors and sources including dbx 3bx-ds, dbx 120x-ds, BSR Spatial Enhancer, BBE 462 Sonic Maximizer, SS-525x EQ, Carver C-9, dbx-224x, JVC cassette deck, Dual 1249 Turntable running through a Garrard MRM-101 Preamp, Pioneer PDR-509 CD Recorder and the Media Center PC stereo analog channels all running through a dbx 400x Program Route Selector (a godsend) which is attached to my ONE TAPE MONITOR on my Pioneer VSX-36TX Receiver. Of course, I have some of my analog processors running in tandem, too, since the 224x only has three processor and three tape loops.

For listening/recording anything 2-channel analog I engage the stack through the Tape Monitor. For everything else I turn the Tape Monitor off. The nice thing about the stack being separate is that I can doodle with recording and use headphones while the TV/DVD/Blu-Ray do something else.

Posted on Apr 24, 2009

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Referring to the picture and remembering that ONLY 901's can run off of any particular amplifier.

http://vintageelectronics.betamaxcollectors.com/sansuistereoreceivermodel8900zdb.html

I can't make out the label for tape copying. You want the 901 EQ to be the "TO" when 'copy' is selected. That way it's EQ will not affect your taping to the upstream deck or processor. Or in your case, you want the RG-1 to proceess the audio first, not after the 901 EQ changes it.

http://www.classicaudio.com/forsale/pio/RG1.html

In to Outs. Both the RG-1 and the 901 Active EQ have facilities for attaching other processors or tape deck(s) within their tape loops. In a pinch you could daisy-chain the RG-1 in front of the Bose 901 EQ on a single tape loop to free up the other one.

Go to Bose.com for the manual and specific pictures of the hook-up.

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Sure it will. It goes in a Tape Loop such as Tape Out/In or Video 1 Out/In. But it won't work for anything except analog stereo sound sources as all digital audio is not available to the RECORD OUT jacks when the Tape or Video 1 is activated. AND 901 Active EQ is intended solely for 901's, not any other speaker system

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Yup, theBose 901's need their own amplifier dedicated. Get yourself a nice Carver M-100T or M400 Cube and run 'em off the Active Eq attached to the C1000 Front Pre-Outs.

Just wondering, why is this a new question to ponder if you've had the 501's and 901's all along. They never could coexist on a single amp.

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http://www.retrevo.com/support/Yamaha-RX-797-Receivers-manual/id/320ag612/t/2/

I assume you've placed the Bose Active EQ in where the Pre-Out >> Main In jumpers were. Do you have the return from the Bose Active EQ going back into the Main In so it can continue to the Sub Output.

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Two problems:

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2) If you had them you would still need a separate amp for the 901's as its Active EQ is unsuitable for 'normal' non-901 speakers and engagement of any analog processor in an analog tape loop (like DVR Out/In) would effectively kill any digital source. It WOULD only work for analog sources.

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I assume it used to work. You need to ensure the connections to and from the active equalizer are all proper. I would think you have it in the Pre-Main loop.

It sounds to me like you have an in/out reversal at the EQ or a dead Tape Monitor selected.

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Bose 901 hookup with Onkyo SR 805 and Onkyo M282 amp and 901 EQ/


The good news. I have a setup similar to what I think you're trying to do and it works great!

The Onkyo M-282 stereo amp for the 901's is the perfect solution. Run it with the Active EQ between the receiver Front L&R Pre-Outputs ** and the 901's amp channels.

**Onkyo SR805 Pre-Out Front >>> Bose EQ Amplifer IN
Bose EQ Amplier OUT >>> Onkyo M-282 IN

Set the Input Level on the back of the Onkyo to MAX. The receiver controls everything just fine after you run through your level setup routine again.

I was looking a the 12v triggers on both units and it looks like you only have a Zone 2 trigger so that wouldn't work for turning on your M-282. I guess you're going to have to turn it on and off the old fashioned way, like I do mine.

Mar 15, 2009 | Onkyo TX-SR705 Receiver

2 Answers

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You will need to connect the speakers to the front channels as you would with any normal set(Speaker + to amp +, speaker - to amp -, etc) then you connect the special Bose equalizer through a tape monitor loop and always have the monitor loop engaged.

Dec 27, 2008 | Onkyo TX-SR705 Receiver

1 Answer

Equalizer for Bose 901 Series IV


There's good news and bad news. The bad news is that a multichannel receiver with Bose 901's attached as you have them will only sound right in STEREO on stereo analog material. For one thing, the other speakers around the room are not designed to receive its Active Equalization and for another, if you engage your Tape Monitor you will NOT BE ABLE TO HEAR DIGITAL sources. Tape Monitor is for analog stereo material only and on my receiver it disables any digital inputs so you really can't use the Tape Monitor circuit or attached devises for modern digital sources. However, you can still employ the various DSP options to spread 2-channel analog source material around the room. I do.

The good news. I have a setup similar to what I think you're trying to do and it works great! With one caveat - My receiver actually has 5.1 analog Outputs so I can drive up to 6 external amplifiers if I want to (I drive 4). Yours does NOT so we have to be creative in extracting the front two channels from your multi-channel receiver. The obvious place would be at one of the few OUTputs on the back, assuming you have one free to use.

I see Video 1 and MD/Tape have Audio Outputs. Use one of these to feed the Bose EQ. **

A separate stereo amp for the 901's was my solution. 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.

** Sony STR-DE595 (Video 1 or MD/Tape Audio Out ***) >>> 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 receivers speaker level setup.

*** In either case you will NOT be able to SELECT the source you use for the 901 Pre-Outs for listening, or else the 901's will not get any sound sent their way. This is what's happening to you right now when you select MD/Tape. You're disconnecting the source from the 901 EQ.

You may have to get ugly with your other input components to find them all homes on the receiver. The labeling won't necessarily match up with the device types. Mine is ugly like that and I have a lot of connectors, but I have even more input devices.

If you have CD, TV Cable box and DVD (typical) you need to assess what you have that is digital and use what you can wherever you can, then the leftover analog device(s) - PC? - can go into any available analog input that is left over.

Whichever of these connections you DO NOT use for the 901's will still be available for using some kind of conventional analog recording device or sound processor such as an EQ or dbx Expander. However, as with any digital receiver, selection of that device for monitoring will kill the sound from any DIGITAL source you have playing (or maybe it just won't allow you to monitor).

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