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Hafler dh220 power amplifier left channel distorsion

The left channel has no sound until the volume is turned 1/4- to 1/2 up on the dial, and the sound is very distorted, scrathchy and, pops when there is a high bass signal. any suggestions much welcomed. thanks, matt

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  • Anonymous Dec 30, 2007

    left channel very low and no base!!!!



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If you need it fixed, see:

Posted on Nov 27, 2009

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States in manual if this happens its prob a fuse inside.check those although its been a yr or so since u wrote this,mike

Posted on Nov 23, 2008


Replace the speaker protection fueses. ;)

Posted on May 15, 2008

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Sounds like your Power FET's are gone. Take it to a shop that specializes in high end or vintage gear. ....good luck...Rob

Posted on Mar 03, 2008

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When setting up xr8600 is it best to start mains and monitors master at 0DB?

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I have 2 12in kenwoods and a 1200 watt pyrimade amp, how can i hook these up to be the loudest

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Turn down your gain as low as possible and then power everything up.

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avoid using bass boost, I agree it sounds great but it puts more strain on your amp and shortens its life.

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If you would like to use bass boost, turn on bass boost first, then up your gain etc.

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On your remote control (with tv off)
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this brings up the service mode (you will see some green text on your screen)
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The symptoms you are relaying definately sound like an internal amplifier problem. It is fading in and out for a reason - usually due to heat.

Have you had the radio bench tested (seperate from the car) to eliminate the car as being the culprit?

Since the radio was run with damaged speakers originally, the output or amplifier power supply on the amplifier may be bad.

As an alternative to repairing, I would suggest investing in a small 2 channel amplifier to power the speakers.

The radios claim 50W per channel, but in reality give 12-15W RMS power.

A dedicated amplifier with built in crossovers and gain adjustments will prolong the life of your speakers and add to the tonal qualities of your new speakers. Instead of turning up the volume on the head Unit, and sending out a distorted signal that will blow your speakers, an amplifier will give more CLEAN power to them, so it will be louder at a lower volume setting.

This will bypass the internal amplifier on the radio, and send a Low Level signal ONLY thru a set of RCA cables.

Good Luck!!

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