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The John East preamp club

#244
How does the internal bass window work on the Uni pre? Is there adjustment for the 'size' of the window with the upper and lower freq filter, then within the window you set the frequency that the bass control boosts or cuts?
 
#245
4stringer711 said:
How does the internal bass window work on the Uni pre? Is there adjustment for the 'size' of the window with the upper and lower freq filter, then within the window you set the frequency that the bass control boosts or cuts?
Click to expand...

You do both at the same time.
You set the low side from 20 to 80 hz. You set the high side from 40 to 200.
I use the high side to select the frequency I want to be centered at and then adjust the bottom to how much subsonic I want to allow in.
Keep in mind, these are gentle slopes so both affect frequency bands that are adjacent.

The best way to go about this is to play with it. Boost your bass and adjust the high side and play, going back and forth with the dial. You'll know when your in your desired spot. It behaves exactly like the mid sweep. Once you have that dialed, adjust how much low bass you want. That's it. Super easy.
 
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#246
Drop1 said:
You do both at the same time.
You set the low side from 20 to 80 hz. You set the high side from 40 to 200.
I use the high side to select the frequency I want to be centered at and then adjust the bottom to how much subsonic I want to allow in.
Keep in mind, these are gentle slopes so both affect frequency bands that are adjacent.

The best way to go about this is to play with it. Boost your bass and adjust the high side and play, going back and forth with the dial. You'll know when your in your desired spot. It behaves exactly like the mid sweep. Once you have that dialed, adjust how much low bass you want. That's it. Super easy.
Click to expand...

Oh, dont forget your pre curve jumper. It gives a 4 db bass and treble boost and can help pickups sound much more even without eq.

For example. With bartolini I like it set to pre curve . Gives a more detailed sound.
With Nords I like the jumper set to flat . It gets too bright with the Nords for my taste.

Set all your eq to flat and try the jumper in both positions. It can make all the difference.
 
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#247
Drop1 said:
Oh, dont forget your pre curve jumper. It gives a 4 db bass and treble boost and can help pickups sound much more even without eq.

For example. With bartolini I like it set to pre curve . Gives a more detailed sound.
With Nords I like the jumper set to flat . It gets too bright with the Nords for my taste.

Set all your eq to flat and try the jumper in both positions. It can make all the difference.
Click to expand...
Thanks for the tips. I didnt realize there was so much flexibility with the bass control. I only knew about the mids.

Thanks also for the jumper info. I expect to pair this with Bartolini Classic Bass Soapbars. That's all a great start.
 
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#248
My Jazz, and Sire both have John East preamps.
20190513_154109.jpg
20190513_154031.jpg
 
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#250
datsaxguy said:
Well, you might think this is silly but I think these preamps are so good they deserve to have a club.

I think there should be a J Retro in every jazz bass and a U retro in everything else. (I'm kidding,.........well, maybe not)

If you love your John East pre chime in. No numbers. Just put a pic of your bass w/ the pre and tell us about your John East preamp pup set up.
Click to expand...
The Dreamy Preamp! John thought out the Uni-Pre (Universal Preamp) so well! He developed it to function according to the way the brain processes sound! Enhancing the 5 frequency points: Bass we feel, Bass we hear, Vocal Bass tones, and Nuances of the Bass signal. In addition, there's a sweepable mid that allows the Bass Player to dial in his signature tone, and it's Active- Passive as well! Nothing short of Amazing! (And no, John is not paying me to write this! LOL)!
 
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#253
I recently changed the way my uni is set up. I like it better this way. I set it up to behave more like a low and high pass filter.

I put the pre Jumper to enhance giving the treble and bass a boost. Then I use the knobs to back off on the bass and treble. From there I use the internal adjustments to adjust the frequency that the bass and treble roll off . So sweet being able to only allow the frequency range you want to come through.
 
Last edited:
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#254
John East is responding, I can confirm that.
I recently mailed with him about East/ACG-01, and I have bad news for @ 4stringer711 - there is no possibility of new East/ACG-01 units to be made, and sold.

This is very, very unfortunate, and I wonder what is the reason for that. I recently contacted mister Alan Cringean (the man behind the idea of this preamp), and he basically said there is no intention of making them in a near future.

Maybe it would be a good idea to show both masters, that there is a market for them after all!!

I salute both Alan, and John!

PS. There is a short run of EQ-02 incoming. I really would like it to be EQ-01, but I might just pull a trigger of those...

Alan, John - please ...
 
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#255
I had finally played an Alembic and realized the dual LPFs made it the most powerful instrument on the market--but the price of the Alembic preamp made it very hard to justify. I discovered the EQ01, budgeted for it and then the _next_ day the EQ01 disappeared from the website. I would literally buy at least two EQ01 preamps if they were made available again.
 
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#256
I know very little about active systems but I'm curious and have been thinking I might "straddle" the passive/active worlds with this setup in my bass that has 2 J-style single coils, 4 drilled holes and one 9V bracket in the cavity:
  • one of these for each PU - Invalid Link Removed
  • balance pot
  • volume pot
Or am I completely off the mark?
 
#257
Llewellen said:
I know very little about active systems but I'm curious and have been thinking I might "straddle" the passive/active worlds with this setup in my bass that has 2 J-style single coils, 4 drilled holes and one 9V bracket in the cavity:
  • one of these for each PU - Invalid Link Removed
  • balance pot
  • volume pot
Or am I completely off the mark?
Click to expand...
Should be cool. I never had a bass with dedicated EQ for each pickup.
I would be more tempted to get the mid sweep module for the other hole. There is a lot of fun and flexibility with the mids on a bass.
 
#259
John also makes a little buffered unity gain mixer. Would it make more sense to run each pickup to its own EQ, and then each EQ into one side of the mixer, then out to a master volume? Not sure how you would pan the pickups...
 
#260
bigtone23 said:
Should be cool. I never had a bass with dedicated EQ for each pickup.
I would be more tempted to get the mid sweep module for the other hole. There is a lot of fun and flexibility with the mids on a bass.
Click to expand...

This is intended for my Warwick Corvette Basic (their entry level) which in stock form has MEC PUs and 2 band preamp. It has a simple tone pot (not stacked) for each PU, balance and volume. I like having separate EQ for each PU but I'm still not happy with the MEC tone, so I'm replacing the PUs with Wilde (B. Lawrence) J-45s. I was going to go all passive but then I came across these East stacked modules. The tone I like is a bit mid-scooped anyway so I didn't consider his mid sweep module.
 

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