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ESP Cinnamon 3 Band EQ for Bass
Posted: 27 Mar 2014, 12:37
by darmstat
Hello....Does anyone have a schematic of the ESP Cinnamon 3 band band on board bass eq?
Re: ESP cinnamon 3 band eq
Posted: 23 Aug 2020, 08:57
by Ichabod_Crane
Bump!
I'm looking for something about this ESP bass preamp, too.
I just found this manual:
https://espguitars.co.jp/guitarparts/wp ... Manual.pdf
Re: ESP cinnamon 3 band eq
Posted: 28 Jul 2021, 01:45
by darmstat
I have a esp cinnamon 3 band eq and I am trying to trace it. Here is the information I have. Can someone look over my schematic and see if it is correct or will work. Thank you
Re: ESP cinnamon 3 band eq
Posted: 28 Jul 2021, 02:02
by darmstat
Schematic
Re: ESP cinnamon 3 band eq
Posted: 28 Jul 2021, 02:06
by darmstat
Sch
Re: ESP cinnamon 3 band eq
Posted: 28 Jul 2021, 02:08
by darmstat
Pic 1
Re: ESP cinnamon 3 band eq
Posted: 28 Jul 2021, 02:09
by darmstat
Pic2
Re: ESP cinnamon 3 band eq
Posted: 28 Jul 2021, 02:11
by darmstat
Pic3
Re: ESP cinnamon 3 band eq
Posted: 28 Jul 2021, 02:12
by darmstat
Pic4
Re: ESP cinnamon 3 band eq
Posted: 28 Jul 2021, 02:14
by darmstat
Pic5 the traces are all on one side. No top traces.
Re: ESP cinnamon 3 band eq
Posted: 28 Jul 2021, 08:16
by Ichabod_Crane
Good job. I'm going to see it better later.
Re: ESP cinnamon 3 band eq
Posted: 28 Jul 2021, 10:48
by The G
This is what I could make sense of:
The 3rd op amp is most likely a single low-power op amp and its pinout should be the same as TL071. I named the double potentiometers' sections as "top" and "bottom", "top" being the closest section to the shaft.
Unfortunately, both the schematic and the wiring diagram are truncated. Also, I'm not sure about "passive treble", "B1", "B2" and "trimmer". Could you post an image of the gain trimmer?
Please let me know how close am I to the real thing, so I'll be able to draw a schematic.
Re: ESP cinnamon 3 band eq
Posted: 28 Jul 2021, 11:54
by darmstat
The gain is the root white wires next to each other. One wire connected to pin one of gain trimmer and the other wire connected to pin 2 and 3 of the same gain trimmer
Re: ESP cinnamon 3 band eq
Posted: 28 Jul 2021, 12:06
by darmstat
Manual
Re: ESP cinnamon 3 band eq
Posted: 28 Jul 2021, 12:44
by darmstat
Wiring
Re: ESP cinnamon 3 band eq
Posted: 28 Jul 2021, 16:37
by The G
The schematic appears to include some questionable circuit choices. The one I like the least is biasing IC1B through no less than two resistors and two potentiometers
LATER EDIT: I forgot to put a +9V wire on the layout. You most likely figured it out, the red is +9V, green is V
ref and black is GND.
Re: ESP cinnamon 3 band eq
Posted: 28 Jul 2021, 17:43
by darmstat
Very strange indeed. Thanks for your help.
Re: ESP Cinnamon 3 Band EQ for Bass
Posted: 04 Apr 2022, 05:00
by george giblet
There's a little weirdness here and there.
I'm fairly certain the mid control has an error:
C9 should connect between IC2A pin 2 and the Mid pot pin 2 (wiper)
R13 should connect from IC1B pin 7 (where it already is connecting) to IC2A pin 2
If you search midrange control you should find many examples of the pattern. It is a very common midrange circuit.
Even the ratio of the capacitors C10/C9 is fairly typical.
(The input side of the Treble control only works with a passive pickup.)