AVR 225 Problem. Very wierd.. please help

[Mike.exe]

I have an AVR 225 Receiver that iv had for about 1 year now. I disconnected it for a couple months, and recently now I've reconnected it. I noticed the left channel is more quiet than the right. So i tried adjusting the DB settings, giving the left +3 and the right 0. That evened out the volume. However, i noticed the following:

1) The bass on the left is far less than the right
2) The voice of the singer (of the music i played) was more faint on the left.

Solutions: I tried switching the speakers (put the right speaker on the left channel) and it was still more quiet. Then i switched wires. Still, Quiet. I adjusted Balance, Bass, Treble. No change in speaker effectiveness. So out of curiosity, I cranked it up (brought it to -8). Both channels played Loud, with no distortion. But the bass is hurting on the left.
Also tried the system reset (back to Default settings). No change.

My Set up: I used an Xbox to play the music with an optical (digital) cable. Then switched to analog. No change.
I used my PC with a coaxle cable (digital). No change. So its not my method of playing music.

Speakers: I'm running two towers. Each towers consist: 1 Dynaudio silk dome tweeter, 1 6.5" Audax mid, And 1 6.5" Seas mid.

If someone could tell me why my left channel is lacking volume, bass and vocals, any help is appreciated. So far, i conclude the amp is damaged. Tho, i don't know how since I've kept it well, and its worked perfectly well over the year that I've had it. Though, it would puzzle me how it can play loud with no distortion if it were damaged.

Thank you for any help.

 

[TLS Guy]

I have an AVR 225 Receiver that iv had for about 1 year now. I disconnected it for a couple months, and recently now I've reconnected it. I noticed the left channel is more quiet than the right. So i tried adjusting the DB settings, giving the left +3 and the right 0. That evened out the volume. However, i noticed the following:

1) The bass on the left is far less than the right
2) The voice of the singer (of the music i played) was more faint on the left.

Solutions: I tried switching the speakers (put the right speaker on the left channel) and it was still more quiet. Then i switched wires. Still, Quiet. I adjusted Balance, Bass, Treble. No change in speaker effectiveness. So out of curiosity, I cranked it up (brought it to -8). Both channels played Loud, with no distortion. But the bass is hurting on the left.
Also tried the system reset (back to Default settings). No change.

My Set up: I used an Xbox to play the music with an optical (digital) cable. Then switched to analog. No change.
I used my PC with a coaxle cable (digital). No change. So its not my method of playing music.

Speakers: I'm running two towers. Each towers consist: 1 Dynaudio silk dome tweeter, 1 6.5" Audax mid, And 1 6.5" Seas mid.

If someone could tell me why my left channel is lacking volume, bass and vocals, any help is appreciated. So far, i conclude the amp is damaged. Tho, i don't know how since I've kept it well, and its worked perfectly well over the year that I've had it. Though, it would puzzle me how it can play loud with no distortion if it were damaged.

Thank you for any help.

My best guess is that there is a capacitor in the audio path of the left channel amp that has changed its value downward. This capacitor is now acting as a first order high pass filter. The overall level is down as there is less bass. Caps quite often fail after a period of inactivity. Units left unused over a period of years, frequently require an expensive total recapping.

You will have to take the unit in for service. With the use of audio oscillator and scope probe being placed one stage after another, the culprit should soon be discovered.