SONY STR-DE998 I have a SONY STR-DE998 receiver. Is it possible to hook up the 901, series 5 with this receiver? How? Thanks, Sal

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

Connect equalizer cables (4 total) to the MD/TAPE section of your receiver. OUT from the receiver to the equalizer IN and Out from the equalizer to IN on the receiver.

One issue with the equalizer running through the MD/Tape jacks is that it may affect any other speakers hooked up to your system.

Contact any service technician. Its audio output circuit board need to be troubleshoot. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

If you get a mini-headphone to rca cable then you should be able to hook the phone's headphone output to an rca input on the receiver and play through there.

You can pull the Left and Right stereo program from either MD/Tape or Video 2 Audio OUTputs. Run a pair of RCA cables to the Active EQ's Line IN; then the EQ's Line OUT to the Cavalier's Line IN.

If the Tape output you're borrowing the program from is already connected to something, use RCA-cable splitters.

Remember to NEVER activate the monitor for that Tape function during playback of any digital audio source - it disables the digital input; or if the 901's are being used - it will remove the signal to the Cavalier.

Now if you wanted to use the 901's in your movie listening this will work with two limitations

Your receiver doesn't have preamp outputs for Front Left and Right out so you'd be extracting only the mixed-down 2-channel version of whatever the Sony is processing.

You'll have to manually control the Cavalier's volume because the pre-out you're using is BEFORE the Sony's volume control.

It might still be an improvement over what you have now.

look at your speaker wire there should be some marking the distinguishes each wire. You need to get this right make sure the negative or black color from the speaker is connected to a negative or black of the receiver. ditto for the positive (red). look on the back of the receiver you should see where the speakers get connected left, right.

You need a 3.5mm mini jack coupler lead with phono plugs on end plug one end into your headphone output on ipod and phonos into your amp lead must be stereo

http://esupport.sony.com/US/perl/model-documents.pl?mdl=STRDE345

They have manual

if you confirmed all connection repeat your speaker setup.

http://www.bose.com/pdf/customer_service/owners/og_901.pdf

It sounds very much like your receiver needs repair by Sony.
www.esupport.sony.com