Having trouble getting a good sound out of a Hartke 7000 amp head. I can't seem to get any volume and decent sound without getting feedback. What's the best EQ settings so I can play the upright in a band setting?
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Double Bass Setting the Sound for an Upright Bass?
- Thread starter R0ckabillyBass
- Start date
Welcome aboard!
I've ask a mod to move this to the Amps&pickups sub-forum.
What pickup to do you use?
What's the input impedance of an Hartke amp head?
I've ask a mod to move this to the Amps&pickups sub-forum.
What pickup to do you use?
What's the input impedance of an Hartke amp head?
There has to be a way to amplify an upright bass without getting feedback. I've seen many players amplified without the dreaded squeal.
Yes. There are many topics about this. This is similar to maintaining balance while cycling.
Disregard unhelpful comments. I'm willing to bet your input impedance is low since thats an electric bass amp. when you plug a piezo into them without a preamp you have to crank it to 10 so get any sound. You'll need to pick up a preamp of some sort.
1. Position the speaker so that it doesn't radiate into the body of the bass;
2. Use EQ to find the offending frequencies and cut those frequencies;
3. Deaden the body of the bass (stuffed soundholes, towel under tailpiece, etc.);
4. Accept that going beyond a certain volume is going to compromise the sound you want.
2. Use EQ to find the offending frequencies and cut those frequencies;
3. Deaden the body of the bass (stuffed soundholes, towel under tailpiece, etc.);
4. Accept that going beyond a certain volume is going to compromise the sound you want.
Thanks for the response. I'm not cranking the amp I have it set at 2. Problem is it has wicked feedback. I was wondering how to set the EQ. I know all my problems are within my EQ settings, but finding where to start to set them is proving to be a task. Where should I set the sliders?
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According to the manual the Hartke 7000 sports inputs of 100k ohms. Piezos work better with 1m ohm or more. A buffer or preamp may help.
How you EQ depends on what frequencies need to be cut. Without hearing it, we can't know ... and it will likely be different in different situations.
Generally, microphones will feed back MORE than pickups. Do some reading in this forum... there's stuff to learn!
I've seen video's of players such as Willie Dixon and Lee Rocker play live. Willie - microphone. Lee - pickup. Can hear them great and they sound great
You first need some impedance buffer.
Can be a small preamp with at least (the more is better) 1Megohms input impedance.
If it can, or the head, reverse the phase of the input signal, it can help.
As already stated, a microphone will only worsen the feedback problem versus a pickup.
What pickup is that?
I bet it's a big part of the problem.
Can be a small preamp with at least (the more is better) 1Megohms input impedance.
If it can, or the head, reverse the phase of the input signal, it can help.
As already stated, a microphone will only worsen the feedback problem versus a pickup.
What pickup is that?
I bet it's a big part of the problem.
Give a helpful comment on how to adjust the equalizer so that there is no feedback. Are you sure such a comment exists?
There are a lot of input factors. Even setting up the same amp with the same bass will differ from room to room. An empirical approach is needed here.
Hey R0ckabillyBass, if you insist on skipping a preamp to get your input to the amp "fixed", then plug into the passive preamp input on the Hartke, make sure the compressor is off, turn the EQ off and make sure all faders are at 0 (flat) except the lowest frequency can be all the way down, the Contours set to 0, Master at 0. Then bring your preamp knob (tube or solid state, I guess) up to ~5, then raise your Master volume to 1 or 2. If you have no feedback, turn the preamp up more. If you start to get feedback, stop raising the preamp level, turn on the EQ and move one fader at a time to see if you can find the feedback. I'd try the 125, 250 & 500. Any how, this is about as loud as your likely to get without a preamp. The other thing would be to also play behind the speaker. Good luck.
Thanks for all the helpful comments. Tonight I will plug it in and do some trial and error.
You will need a pre-amp to buffer impedance, as others have indicated. This is far and away the most important factor for you. Make sure that the preamp you choose solves the impedance issue. If you want to use a mic now or in the future, there are very good, but usually expensive 2 channel versions you should look at.
