Question about Hartke VX3500 Bass Guitar Combo Amplifier

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No sound coming out for my hartke amps?

Power is ok.only no sound coming out ?

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Are the internal speakers properly connected via the rear-mounted 1/4 inch "Speaker Output" jack? If so and still no sound, try connecting a separate external speaker (floor monitor, pa cabinet) for a "low volume" test.

The OM says the internal speakers are 4 ohm so it's unlikely that a wiring problem with speaker connections would cause all four to stop working. With AC power disconnected from outlet check for an internal speaker protection fuse BUT be careful. Charged capacitors can hold a charge for weeks!!!

Posted on Nov 01, 2012

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This problem has to do with a Hartke 3500 bass amp. I recently purchased a replacement UCISC (the part with the female plug and fuse box) and replaced it. I tried to be very careful putting all of the...


Easiest way to check is to measure the resistance between the ground pin of your cord and the chasis of the unit. It should be very low. That is the only critical one... Look at a receptacle. See one bllade is wide? That is the neutral. The other one is the HOT side. The HOT SIDE should go to either the fuse or the switch first in your unit. If you have those right the third wire will be right.
When powering up an amp there often is a noise until the amplifiers balance out. Very high quality and high power amps have a relay that disconnects the speaker until balance is reached... but the smaller amps do noot have this feature.

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Amplifier head is working but no sound from speakers. Head tested with external speakers and is OK.


A simple test is to connect internal speakers across an AA battery (for about half a second) & listen for a click as battery is connected & another as battery is disconnected.

If this does not happen, check the internal jack plug connection & its connection to the speakers.

If OK, then you can test each speaker individually using the same battery across each in turn.

If this advice is helpful, I would appreciate a rating.

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My amp has output but no sound from the speaker.


If you have tested with other speakers, you may have blown the ones that are not working. Test the speaker(s) on another source. I am not sure how you have tested your amp that it "has output"... indicators mean NOTHING on the amps as far as actual power going out.

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Amps in a seires


I'm not sure what this will do, but electrically you can hook these up. Using the line output from the swx, connect it to the line level input. I think that that would be the active input. When you connect a guitar(without a battery powered pickup) to the hartke, it goes to the passive input right? If so, then connect the line out of the swx to the active input. Reverse if the behavior is opposite of what I described.

Realise that with these two connected to each other, you will be using both pre-amp sections and the amp section of the hartke.

Dan

Mar 01, 2010 | Music

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