Question about Sony STR-DE595 Receiver

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Equalizer for Bose 901 Series IV

I connected the Bose 901 Series IV equalizer to the tape loop but I can't get any sound when I push the MD/Tape button. I have my computer plugged into CD inpput and everything plays fine when I push CD/SACD button. It even plays fine when I Plug computer into Tae in treminal and push MD/Tape button.

Also, I don't seem to get the volume at maximum setting that I would expect from a receiver with this power output rating.

Any ideas?

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  • ernestos Jun 30, 2008

    i have the exact same problem, same receiver, same 901 series 4 speakers. can't get the eq to work with this receiver. what are the options?

  • Tazmateo Sep 19, 2008

    looking for the best receiver/amp for looping in my series 4 Equalizer w/901 speakers

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  • Master
  • 8,546 Answers

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).

Posted on Apr 24, 2009

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I own 901's(since new) with the active equalizer powered with a non-Sony surround sound receiver.

Basically, you use the MD/Tape in/out jacks to route the signal to the Bose active equalizer. Switch the Tape Monitor switch if no sound is heard.

Here are some references.
https://docs.sony.com/release/STRDE897.pdf http://products.bose.com/pdf/customer_service/owners/901_guide.pdf

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In any question regarding connections the exact models of all parts in the scenario should be defined.

"Pioneer amplifier" is not unique nor revealing. Integrated amplifer? Power amp? Tape Loops available? Pre-Outs? What's involved as a preamp?

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NEVER USE MAXIMUM VOLUME FOR ANY PURPOSE UNLESS THE RISK OF ACCIDENTAL SPEAKER DESTRUCTION IS A ACCEPTABLE.

ONLY now it does that? "VERY WEAK" as in attentuated somewhat or is it signal leakage, effectively silence? How is the EQ wired in? Check its own Tape Monitor button.

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  • 1

    Examine your receiver to be sure it has a tape monitor loop. Receivers with a tape monitor loop will have a button or switch on the front for "Tape Monitor," and have two sets of RCA connections on the back, one labelled "Tape In," and the other "Tape Out."

  • 2

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  • Read more: How to Install a Bose 901 Equalizer ' eHow.com http://www.ehow.com/how_4813156_install-bose-equalizer.html#ixzz19vfsJTQu

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