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Full parametric EQ onboard?

i_got_a_mohawk

i_got_a_mohawk

Feb 9, 2005
17,483
505
40
Edinburgh & Dundee, Scotland
#1
I was just wondering the other day if anyone makes anything like this?
I had an idea for jazz bass with 4 controls on the front panal, all of which would be stacked pots

Volume \ Volume
Treble Shift \ Treble Level
Mid Shift \ Mid Level
Bass Shift \ Bass Level

Is this too outlandish and OTT or is it actually possible?

This is just for a possible future project. . .

Cheers guys
 
#5
It's do-able. Power consumption would be a bit of a problem.
Technically that's semi or quasiparametric and not full parametric, full parametric gives you control over the Q, or width, of the filter.

P.S. switched semiparametric would bring the power consumption back down, I don't think anybody makes stack DT rotary switches though. On that subject I don't think anyone makes stack dual-gang pots which you would need unless you went with a gyrator based design (not my favorite).
 
#6
Tim__x said:
It's do-able. Power consumption would be a bit of a problem.
Technically that's semi or quasiparametric and not full parametric, full parametric gives you control over the Q, or width, of the filter.

P.S. switched semiparametric would bring the power consumption back down, I don't think anybody makes stack DT rotary switches though. On that subject I don't think anyone makes stack dual-gang pots which you would need unless you went with a gyrator based design (not my favorite).
Click to expand...
Oh well, you've completelly lost me there :p

It was just an idea i had after playing with the eq on my btb for the first time in a while, i can see where a low mid and high mid shift would be better than the bass and trebel shift tho
 
#7
Okay, here's the non-tech version.

It's possible, but it might be hard to cram it all into four pot holes.
There are a couple of manufacturers that make preamps with sweepable mids, the J-Retro U-Retro preamps come to mind. As far as I know no one makes an onboard three band parametric preamp.
 
#9
I think a 4 band EQ with dip switches to toggle between 2 different frequencies per control, where those two frequencies are controlled by trim pots inside the cavity .... would be pretty killer. I'd probabaly set mine for:

40hz (throb)/120hz (thick)
200hz (boost for note definition)/500hz (cut for slap)
800hz/1.2kHz (both for removing harshness)
2khz (bitey)/4khz(sparkly)

Having frequency sweep controls on the bass would be too unrepeatable for my taste.
 
#11
Check out the Tyler spec'd Demeter preamp. It's now what you're asking about but it's an extremely versatile preamp. Demeter will sell you one as well.

Also, if you become serious about it than talk to Mike Pope. He'll steer you in the right direction and make you a preamp similar to what you're talking about, for a price.......

I personally never liked eq on my basses. I always boost the bass eq a notch and leave it alone forever. The Tyler preamp is the only one that really made me want to look for different sound in a preamp.
 
#12
Andy Daventry said:
More useful:

Volume \ Volume
Treble \ Bass
low Mid Shift \ low Mid Level
High Mid Shift \ High Mid Level

But why? You can put this on your preamp. why on a bass? Why would you want to redefine mid frequencies while playing?
Click to expand...
Well, in some situations as we all know, our equipment does not "sound" the same venue to venue. So being able to sculpt the sound specific to what you need at the moment is sometimes very crucial. Not so much song to song, but venue to venue. I think it's a great idea to have a full parametric eq on board the bass pre amp.
 
#13
This is what you're looking for, the Noll TCM 3P option B2043 which is a 4 knob platform. If you need 5 knobs then you get option B 2042 as seen here:
Link Removed

The circuit has a volume/blend not volume/volume but I believe the blend is buffered. For clarity email Klaus Noll he's good with replying in a timely fashion and will answer all your questions.:cool:
 
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#14
Clark Dark said:
This is what you're looking for, the Noll TCM 3P option B2043 which is a 4 knob platform. If you need 5 knobs then you get option B 2042 as seen here:
Link Removed

The circuit has a volume/blend not volume/volume but I believe the blend is buffered. For clarity email Klaus Noll he's good with replying in a timely fashion and will answer all your questions.:cool:
Click to expand...
This is very interesting indeed. I noticed the volume knob on the wiring all have push pull for passive active operation. If I install it, will I be required to do that? Or can I leave it just as a regular volume knob? I'll email Klaus about that. Overall, this is exactly what I was looking for to put on my ATK805e.
 

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