The front Left and front Right speakers of my denon AVR 900 are working fine... The center/woofer/ and back left/right are not working at all. I was given the receiver by my brother and I don't have the manual or the remote...
How do I activate the other speakers?
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Check all connections and the balance settings. (Left / right/centre) If these are ok, the output system on the amp has probably failed. Denon are a good unit. See if there is an Agent or Amp specialist nearby that you can take it to.
Hi, Your sub-woofer apparently does not have an amplifier built into it. This type requires you to use your front left and front right speaker output to got through it to your regular speakers. It is called a passive sub-woofer for that reason. To set it up, Connect your front speakers to the "output" of the sub. It should say "to speakers" on it. Then connect the Speaker Outputs for the left front and right front on your DenonAVR-391 directly to the Sub. It should say on the back of the Sub "to amplifier". Here is some theory you should know, if you don't already know it, that will help you get a satisfactory result in setting up this system. There is a condition on setting up all speakers and subs that not everyone know. It's call "phase alignment". Phase alignment (A Good Thing) refers to all of the speakers in a system moving in the same direction (in and out) at the same instant in time. This gives you much clearer sound and better response from your sub-woofer. Phase Cancellation (a bad thing) is when some of the speakers are moving out and other moving in during the very same instant in time. It causes problems in sound. IN A SUB-WOOFER, IT CAN CANCEL OUT THE LOW NOTES. Here is how to handle it: On the back of the receiver the speaker terminal outputs are colored Red and Black. Black is considered negative and Red is considered positive. On the back of the Sub woofer and on the speakers the same colors apply. MAKE SURE THAT ALL OF THE CONNECTIONS GO BLACK TO BLACK AND RED TO RED WHEN CONNECTING UP THE SPEAKER WIRES. The system will work either way. But you will have severe bass loss if the woofer wiring is out of phase because of phase cancellation. Hope this helps, Best Regards, Mark
connect your right speaker cable to the left output, if the sound comes out then the problem is on the left speaker ( the cable or the speaker itself ), but if still no sound, then the problem is on the power output of the unit, need to repair them
the problem you have seems to be on programing the master effects to get to it go to main menu and see the distribution and effects you want to hear on you home theather.remember that home surround needs some decoders to send the sound where the images come and its right built in....
The Denon 2500 was one of the best ProLogic receivers built, it was a work horse and very little ever went wrong with them.
To make sure you're only supposed to hear right & left speakers, press the Stereo button on the remote. Also recheck your speaker connections - this is the single most overlooked connection problem folks have.
Check the balance control to make sure it's in the center position
Make sure the Tape Monitor is not engaged.
Then, check to make sure that the Pre-Out, Main-In jumpers are connected properly on the rear panel.
If that is not the problem, try pressing the Tone Direct button on the remote (aka Tone Defeat on the front panel).
My guess is You have dried out electrolytic capacitors causing failure. These receivers when they get over 6 years old start drying out fluid in capacitors especially on regulator p.c.b. causing noisy supply lines. I work for Authorized service center in Michigan If you need repair and Shipping to Michigan is economical let me know firstname.lastname@example.org