Author Topic: Signal paths - bass/treble controls with Q's & filters (Read 321 times)

terryc · « **Reply #15 on:** January 24, 2006, 01:05:03 AM »

Phew!!!..looks like a pretty complicated thread here!!..
I wonder if Alembic use a mid range control for even further tone modification then there is your amp to contend with!
I was told by Mr Wickersham(mentioned in another thread) that all is needed with his circuits is a good quality power amp with only a gain control and a equally good quality speaker cab. I agree as I set everything flat on my amp and just use the controls on my bass and I only have vol, pan, filters x2 and single Q switches...I wonder what it would be like with all those combinations.
Well I could go the other way..imagine if there was on control which did it all.
Has Alembic ever made a bass with one PU vol & tone and Alembic 'Precision' if you will all humour me please(I didn't mention the F word)

adriaan · « **Reply #16 on:** January 24, 2006, 01:22:19 AM »

Not sure if they were done in any big numbers, but I seem to remember pictures of Persuaders with a single split p/u, and the low-pass filter. Also, the early Distillates made for the Japanese market had a single AXY - but with with the low-pass filter plus the quick tone switches ...

keith_h · « **Reply #17 on:** January 24, 2006, 04:01:58 AM »

Dave,
Why is there tape on the trim pots???

There is only tape on one trim pot. Inside the cavity there is a preamp with an exposed pot. This one adjusts the maximum volume.

The filter that is added by EMW also has a trim pot but it is taped over. This filter is wired to the preamp board. I really don't know what it is for. I assume it controls the output of the filter
and has been set to a level appropriate for the preamp.

Keith

gare · « **Reply #18 on:** January 24, 2006, 07:24:11 AM »

Dave/guys
ALL these arguements make sense.
I could have choose my wording better, instead of 'restrict' or 'remove' a better word would be 'attenuate'. which is really what the filter does at whatever the slope is designed for, 6/12/24 db's. I'm by no means an electronics expert, my experience comes from messing around with synths and building a modular synth (a work in progress).
The previous lenghty thread about instrument frequency range and filters explains it alot better.
I don't really know the order of the filter and active controls in these setups, it may be pararell, but it is additive, prehaps Mica or Val could shed more light on this.
I wonder if the tape in there is like the tag on a mattress..

bigredbass · « **Reply #19 on:** January 24, 2006, 08:43:22 AM »

I'm surprised about the tape as well . . . most everything around here goes straight to hard disc.

J o e y

adriaan · « **Reply #20 on:** January 24, 2006, 08:59:02 AM »

Okay, I laughed. Out loud, even. Good one, Joey!

mica · « **Reply #21 on:** January 24, 2006, 11:36:08 AM »

When you're multiplying, it doesn't matter which one comes first, 5x2=10 and 2x5=10. So the short answer is it doesn't matter which function comes first in our circuit since the functions act to multiply eachother.

In the case of the EMW electronics, since we use our standard modules to build them, there's a preamp on both the filter and the bass/treble module. We turn one down all the way (unity gain) and place the little dot over its trimpot to suggest you use the other trimpot when adjusting the gain of the system.

gare · « **Reply #22 on:** January 24, 2006, 01:35:51 PM »

Thanks for the clarification Ms.Mica.

I work with a few people who could take that equation and come up with a different conclusion..I've developed a bad disc in my neck from constantly shaking my head !

kmh364 · « **Reply #23 on:** January 24, 2006, 02:44:50 PM »

Wow! Good thing only one stage contributes gain! EMW electronics can overdrive just about anything out there with only one gain stage...crank-up the other one and fuzz-bass yourself silly! LOL!

Other than re-attaching a loose modular connector and replacing the OEM battery upon initial delivery of the Son of EMW Orion, I haven't ventured beyond the brass cavity plate(s). Thanks to the other EMW owners for the primer.

Thanks for the clarification, Mica. This thread was working itself up into a fine lather.

bigredbass · « **Reply #24 on:** January 24, 2006, 03:47:01 PM »

5 x 2 . . . anyway, what's an EMW? Where'd the tape come from? I'm SO confused . . .

J o e y

kmh364 · « **Reply #25 on:** January 24, 2006, 03:59:20 PM »

keith_h · « **Reply #26 on:** January 24, 2006, 06:30:45 PM »

Joey,
Just think analog. No slipped disks that way. Right Gary?

Keith

bigredbass · « **Reply #27 on:** January 24, 2006, 07:23:54 PM »

E lectro M agnetically W arped? The truth!?!

The truth?!?!? You can't HANDLE the truth!

But I've got the tape.

J o e y

bob · « **Reply #28 on:** January 24, 2006, 10:05:20 PM »

But the tape has gaps...

terryc · « **Reply #29 on:** January 25, 2006, 12:45:44 AM »

what tape??? what EMW, which control do I turn now..too much to take in..may have to go back to F Precision...aarghh!!!!!!!!!!!!!!!!!!!!
losing it over this thread..pass me the Prozac