#1
I recently bought a bass amp and cabinet used.
It was an outstanding deal and the only problem is that the amp puts out 140w at 4ohms and the cabinet is 400w at 8ohms.
How can I get the amp signal to 8 ohms or something?
I get some distortion after turning the amp up to about halfway and I believe this is because of the different resistances.

For further information:
The amp is the Hartke HA1400 (140w)
and the cabinet is the Hartke VX410. (4x10)

If I could get some advice it would be great.
#2
Take it to a guitar shop,
see if they can do anything?
:/
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#3
You're only getting 80 watts with an 8 ohm cab, it shouldn't be affecting the sound at all using an 8 ohm cab.
Take it to an amp specialist to check it all out.
I believe, after seeing the amp, the volume knob may also be the gain knob, and that'll be why you're getting the distortion.

Definitely get an amp specialist to check it out.


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#4
Quote by Str1ke_Zone
I recently bought a bass amp and cabinet used.
It was an outstanding deal and the only problem is that the amp puts out 140w at 4ohms and the cabinet is 400w at 8ohms.
How can I get the amp signal to 8 ohms or something?
I get some distortion after turning the amp up to about halfway and I believe this is because of the different resistances.

For further information:
The amp is the Hartke HA1400 (140w)
and the cabinet is the Hartke VX410. (4x10)

If I could get some advice it would be great.


The cabinet is rated at 400w @ 8 ohms meaning that's how much it can take before speaker breakup occurs. If you want clear basslines, you want the handling ability of your cab to exceed what your head can put out. If your head is putting out equal to or greater than the capacity of your cabinet, speaker breakup will occur and then you'll start having problems.

A lot of amplifier heads will have a switch or knob to change impedance. The Hartke doesn't? If not, getting the correct impedance is only a matter of plugging in another 8ohm cab.

The buzz, like everyone else said, should be checked out by an amp tech. But looking at it, I see it's a discontinued 140w solid state head, probably should just be replaced with something that can actually drive those cabinets without having to crank the volume so high on it.
Last edited by Elvendar at Feb 1, 2009,
#5
Okay. Thanks for the quick, informative answers guys. I guess Ill take it to my local amp guy to check it out.