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#1
Posted to rec.audio.car
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car radio with low volume output.
I have a VW OEM car stereo cassette radio. 4x20 watts. The speaker
impedance is 4-8 ohms. I only use the front channels and have the fader set to front. I keep the balance in the middle. This radio has never had much volume, but recently it's even lower, to the point that if traffic is noisy it's hard to hear. I've known for a few months that one speaker wasn't working, and just found out it was a wire that had slipped off the connector on the speaker. But I've been using the radio for months with this speaker disconnected and I'm wondering if this could have affected or damaged the output amplifier stage. Is there a measurement (millivolts?) that I can take from the speaker wires that would help troubleshoot this. And is there anything I can do to further check this problem. The speakers are only 4", so they should be overwhelmed with the volume control on full, but it's not even close to doing that. |
#2
Posted to rec.audio.car
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car radio with low volume output.
In article , "jbclem" wrote:
I have a VW OEM car stereo cassette radio. 4x20 watts. The speaker impedance is 4-8 ohms. I only use the front channels and have the fader set to front. I keep the balance in the middle. This radio has never had much volume, but recently it's even lower, to the point that if traffic is noisy it's hard to hear. I've known for a few months that one speaker wasn't working, and just found out it was a wire that had slipped off the connector on the speaker. But I've been using the radio for months with this speaker disconnected and I'm wondering if this could have affected or damaged the output amplifier stage. Is there a measurement (millivolts?) that I can take from the speaker wires that would help troubleshoot this. And is there anything I can do to further check this problem. The speakers are only 4", so they should be overwhelmed with the volume control on full, but it's not even close to doing that. If the amp is only outputting on one side of the bridge, it will be half voltage or 1/4 power. A sine wave should have about 8.6 volts RMS with engine running. 8.4 volts engine off. You need a tone test cassette. greg |
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