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Bose 901 equalizer

How to I connect a Bose 901 equalizer to a Yamaha RX-461 receiver. Can I find the Channel A PA inputs, and insert it there? Does anyone know where the PA input is?

Mark

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  • Cembalo Mar 29, 2008

    Hi Graeme,
    Unfortunately the Yamaha RX-V461 doesn't have a tape "monitor" loop or pre-out-amp-in jacks - only a constant volume line-level output on the md/cd-r output and the dvr output to record externally. (My 35 yr old Technics had both tape 1 and tape 2 "monitor" switches but died.) I would try to trace back the PA power transistors for L & R for speakers "A" and find their line-in point with an audio probe, cut the PC board runs if necessary, and solder pre-out and amp-in RCA lines running out the case to connect the 901 equalizer. What I don't know is how many stages the PA consists of or if the 5 channels of PA's are a separate pc assembly. (I haven't taken it apart yet.)

    I assume Yamaha uses this PA circuitry on many models and possibly another 5.1 schematic might be of some help. The RX-V461 schematic I can't find on the internet and a parts request to Yamaha has not been answered yet.

    Many thanks,

    Mark

  • alleycat1253 Jul 17, 2008

    HI, ..I RECENTLY BOUGHT A PAIR OF BOSE 901 SERIES 4 AND IT CAME WITH THE BOSE 550 AM/FM RECIEVER WITH BUILT IN SERIES 4 EQUALIZER...IS THERE A WAY TO HOOK UP AND USE JUST THE BIULT IN (EQ) AND HOOK IT UP TO A MORE POWERFUL RECIVER..ON BACK OF RECIEVER I ONLY HAVE 3 CONNECTION CHOICES AND THEY ARE...(AUX)..(PHONO) AND (TAPE " IN,OUT" "R +L "........CAN YOU HELP ME?.........THANKS ALLEN

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  • 1,512 Answers

Hi Mark, had a look for a manual on your Yamaha, but not got to one as yet. Does it have any RCA connections on the back marked as preout prein? best place to put the 901 EQ is in line with L and R front channels at this preout prein point.

Some amps DO NOT HAVE IT. If our does not, then you could connect it in the tape loop, tape out(rec) to input on the EQ. and the output of the EQ connected to tape in(play), but connected like this, the EQ would affect the tone across all channels(unless you are just running a stereo rig, then this way works great!!) Try this and you may just have solved you problem anyway.

regards
Graeme

Posted on Mar 29, 2008

  • Graeme Ross
    Graeme Ross Mar 29, 2008

    Hi Mark, it is usual for there to be some sort of tape monitoring involved in a tape loop. Not a deliberate "monitor" as such, but you should still get audio to loop when you have selected one of the "tape" style functions. Do you have a VCR in/out for instance. That could be used as a loop, the actual source selection then made by changing the REC out selector(leaving the unit main source selection to VCR)

    went looking for a manual again, but came up nada. I know it sounds silly, but can you recheck the model for me. I have found plenty of listings under your model, which would tend to point to it being a released model, but odd that there seems to be no docs on it, even at Yamaha. Will keep looking

    regards
    Graeme

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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

    Take the two cables that are provided with the 901 speakers and insert one end of the first cable into the "Amplifier Input" jacks of the equalizer. Connect the red connector to the R input and the other connector to the L input. Connect the other end of this cable into the "Tape Out" connections on the receiver. Again, hook red to R and the other to L.

  • 3

    Connect the second cable between the "Amplifier Output" jacks of the 901 receiver and the "Tape In" connections on the receiver. Follow the guidelines in Step 2 for R and L connections.

  • 4

    Plug the 901 equalizer into a 120-volt electrical outlet. Your 901 equalizer is now installed.



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    6eb692f.jpg
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    Please kindly rate this solution
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