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Car speakers pop when on/off new stereo preamp out to Bose amp

My 300zx came with a great Bose sound system. I hooked the preamp output from a new CD player stereo to the existing Bose amp and speakers. There is a loud speaker pop when the preamp out voltage goes to zero, ie. on/off, or change source, or just volume to zero. Is there a device to hook in-line between them or do I have to use the stereo powered output and wire around the Bose amplifier?

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  • Anonymous Mar 21, 2014

    sounded great until i had new fuel pump installed??? don't know if someone there pushed a button or busted speakers?? just sounds really bad.

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Hi mate

this maybe caused by a positive and negitive wire touching somewere down the line!

just follow up your wires and check

Posted on Feb 16, 2009

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I'm trying to hook up a Carver HR-752 to Bose 901's series VI, I would like to use the preamp out and in on the back, do I need a seperate amp to use these? I have them going through the Tape


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If you already have a receiver with front left and right pre-outs, I would add an amplifier. (other option is a pre-amp) Use the amplifier to create the loop the 901's need w/ their EQ and it will also add a cleaner sound and added power. That's how you can really make the Bose 901's sound amazing.

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I am setting up 4 bose 901s to my home stereo and am unsure how to connect my components to tha 901s active equilizer. the 4 901s are connected to 4 marantz ma 500 amplifiers. the amplifiers are...


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Sony CD player Red / White RCA - > CD input RCAs on the Arcam.

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I have an old integrated amplifier and an old BSR EQ-3000 stereo frequency equalizer. i just bought a used bose 901 speaker set. how do i hook-up the bose 901 equalizer in this system?


Hook the signal source to the equalizer input and the equalizer output signal to one of the signal inputs on your amp. This is one way, but this way only one signal source will go through the equalizer (unless it has several signal inputs and a source selector switch).

The other way (inserting the equalizer between the preamp and the main amp) is:

If your amp has RCA connectors on the back named "preamp out" (or similar) and "power amp in" (or similar) that have slugs connecting them, remove the slugs, hook the "preamp out" signals from the amplifier unit to the signal inputs on the equalizer and outputs from the equalizer to the "power amp in" inputs on the amplifier.

Basically, what you do is that you insert the equalizer between the preamplifier section and the power amp section of the integrated amplifier so that you can still select the signal source without having to switch any signal cables (however, i can't say if your amp has got this type of "slug" connection feature between the preamp and the power amp on the rear panel, so i'm not sure which way you'll have to hook it up).

Hope you can make it work the way you want.

regards

Triarcuate

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1 Answer

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Tech data sheet with diagrams:
http://www.bose.com/pdf/professional/802III_techdata.pdf

In a nutshell, the controller would go between a preamp Stereo OUTput and a dedicated amplifier INPUT. You can't use Bose 901 or 802 EQ in a multichannel setup without separate amps for the Bose speakers.

The Bose 802/901 family uses full-range speakers instead of traditional woofer/tweeter combinations, so they compensate for the response limitations at the extreme frequencies by using severe electronic modification of the program material. Hence, they are a system, functionally inseparable, but the results are outstanding. Consequently, they need a dedicated amplifier so they alone get the processing provided by their electronic component.

In a vanilla stereo configuration you would just put the controller/EQ into a Tape Monitor loop but multichannel sound and digital sources won't work that way.

You should be able to draw off the (assumed) Front L&R channel preamp signal from the MD/CD-R or DVD-R Audio Out (REC) jacks (*). Run that to the Preamp In (or whatever it's labeled on the Bose EQ/Controller). DO NOT run a return RCA pair back to the Receiver as Bose-processed signals will not play well with non-Bose speakers. (*) Run the Output of the Bose EQ/Controller to a powerful separate amp for the Bose 802/901's. I use two channels on a Carver multichannel AV-406 amp but a stand-alone Carver MT-200T also works well. A good clean 100 watts/channel should suffice at home.

* If possible, choose the recorder loop you are NOT using for something else. If you're using the MD/CD-R or DVD-R Audio OUT for a recording device just get some RCA splitters to share the Stereo signal between the Bose and the device at the same time. However, once you select monitoring of that recorder two things will likely happen - 1) you'll lose the Bose and anything digital in the receiver will be disabled.

It's the nature of the digital beast that analog monitoring gets in the way of DSP.

Of course, if anyone who reads this has a receiver with individual analog Audio Outputs for the various 5.1 channels (as I do), the solution would be to draw off the Front L&R channels to the Bose EQ and downstream amplifier and the rest would be the same but without Recorder Loop limitations.

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Does your tv have stereo outputs? if yes all you have to do is run RCA red..white jacks into tv outtput then run the other ends into the amps tape or aux or cd input and your done! If you dont have outputs on tour tv you will have to but an RF converter box (about 20.00 at wal-mart) and hook that into the tv and the cables will run out of that to the stereo!

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I have bose 901 speakers. what kind of amplifier(equipment) doI


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Note: Specifications subject to change without notice. Bose Corporation is not responsible for any inaccuracies due to manufacturer changes. Inclusion in this list does not indicate an endorsement by Bose Corporation. When in doubt contact the manufacturer of the equipment.

I have the list in a pdf document but do not see a way to attach it.
Contact me at danmc@uwyo.edu and I'll forward the pdf.
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1 Answer

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No volume


The Bose system in the Z is wired to control the entire car's speakers. Each speaker has its own amplifier, and the OEM head unit puts out a line-level signal to each amp. Your Clarion unit puts out speaker-level signal (in effect, an amplified signal), into the Bose amps, and it's probably overdriving them and putting them into shutdown.

Your best bet is to replace the Bose speakers with aftermarket speakers meant for a speaker-level drive (which is what I did in my Z, and never once regretted it). If you do so, you'll need to run new wires to the speakers, or if you use the OEM wiring, you'll need to unplug the amps and run the wires from the amp harnesses directly to the new speakers. I think there is an adapter harness you can use that will tap into the line-out jacks on your Clarion, so that a line-level signal can be sent to the Bose speakers - I'd do a google search for "Metra harness 300zx" or something along those lines (Metra makes the lineout harness adapters - I use one in my Audi).

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