I am planning on buying Denon AVR 1909 receiver. Can hook it up with Bose Acoustimass 6 speakers. DOes the Denon blow up the small bose speakers. If yes how do i hook them up.

Well the basic connection of the speakers would be the same as another stereo speaker pair. Wire the left and right speakers to the L/R Front Surround speakers on the Denon.

With the 901's I am assuming that there is an external equalizer supplied by Bose. Typically this EQ is installed in a tape loop on the receiver/amp so that it is ahead of the power amplifier that drives the speakers. This EQ needs to be there to attempt to get reasonable frequency response from a speaker that has only 4" drivers. I'm not sure I see any reasonable way to make the EQ work with the Denon AV receiver. You'd likely be better off using the Bose speakers in a dedicated 2-channel stereo and getting a set of speakers for the AV usage.

Denon AVR 3802 Operating Instructions Manual

Plug the speaker wire from the speakers themselves directy to the receiver or you can plug them into the acoutimass module and the module into the receiver using speaker wire.

You don't say how "TV audio" is entering the system.

My guess is you're using analog audio Out from the TV into an analog input on the Denon. One channel failing would probably be the Left Channel cable failing or not seated.

I always recommend bypassing the TV audio entirely if the programming comes from somewhere other than its own antenna, as TV audio electronics add nothing good to the process.

If you're using cable box, sat box, game, whatever, ITS audio is best sent directly to your Denon's specialized audio hardware - digitally, if possible, to preserve multichannel possibilities.

You could also run standard analog audio from the cable box to the TV analog Audio IN if you just want to watch news and weather on TV speakers without the Denon involved.

The entire 5.1 amplification system, in the Bose Lifestyle 35, is actually part of the Bose Acoustimass (subwoofer) module. The RJ-45 (network type) connector passes a low-voltage signal from the console to the Acoustimass module. If you were to hack the connection, and plug the speaker outputs of a 5.1 receiver to the RJ-45 socket on the Acoustimass module, you would blow the amplifier.

If you are really itching to replace the Bose Lifestyle 35 console with a regular 5.1 receiver, I strongly suggest you sell your Bose system, and purchase a Bose speaker system, such as the Acoustimass 10 Home Theater Speaker System, which is made for use with a standard 5.1 surround sound receiver.

Bose Lifestyle (and all Bose-amplified speaker) products and their speakers are SYSTEMS and should not be split up or intermixed with other brands or models. Damage will probably result. Proprietary connectors provides a clue.

The digital audio out should work with the Bose. You could still use your Denon to drive a conventional sub in your scheme, but you would have to manually match volume with the Bose. Or go Full Monty and buy a full complement of speakers for the Denon, retask the Bose and slave its sources to the Denon.

Hope this may help but you will disappointed. as heard from some pro, your amp will blow up the bose cube if direct connected to them, they are powering down your output to fit their tiny speaker. My understanding was you have to hook up everything to the bose module. They don't like to play with others.

http://www.allbose.com/Question.aspx?id=64108

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http://www.riverparkinc.com/techpdf/Bose%20AM6%20&%20AM10%20Series%20III%20owners%20manual.pdf

Well,i can tell you are not very focus,cause you posted Denon AVR-2807 with Bose AC 15 problem,but under your details,you put down AVR-5807!
First of all,it is so unfortunate that you are NOT able to gain and experience to true ability in sound for this wonderful receiver when you are using a dual tweeters speakers and expect to have good sound separation as a TWO WAY speakers(a tweeter and a midrange-for true high frequency and mid frequency sound separation.)
Secondly,you have defeated the audio configuration of the Denon AVR-2807,since all your speakers are control BY the Bose subwoofer.
Now,i could show you a way to hook this up,and it doesn't matter how you connect them, they are the "bicycle tires" installed with a "Porche"engine if you know what i mean.
If you want a good recommendation for your "beast",i will more than happy to show you the way!
Cheers,
solutiondoct

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

one option that may yield results, since the bose connection to equalizer is presently not possible is to set the speaker out put on the denon for 'small' on all but the front speakers.
and then set the delay for all speakers based on the distance to the amp.
this should result in better audio that that with the bose eq.
will work on the issue of using the eq. with the denon if you like. but, you will likely not improve on the sound with the denon set up correctly.
good luck
mark