|
Post by jacobamerritt on May 21, 2019 21:21:57 GMT -6
I absolutely LOVE the SoundToys Sie-Q... Maybe my favorite shaping/character EQ ever. The Siemens W295b its based on is extremely old and expensive for actual hardware. Does anyone know if there is another 'modern' EQ unit that has a similar vibe? I'd pay for that. Any ideas audioscape , Locomotive Audio , rocinante , EmRR ?
|
|
|
Post by EmRR on May 22, 2019 4:44:56 GMT -6
I don’t know. Haven't used a W295b, nor many modern EQ's trying to do anything like a vintage EQ.
|
|
|
Post by matt@IAA on May 22, 2019 8:28:30 GMT -6
Looking at the schematic it is not dissimilar to a how a 1073 works. It has four parts:
Input transformer feeding a three transistor buffer, RC low and high shelving filters, followed by an L-R//C high pass filter (DR1) and then an inductor peaking mid band. These are separated by two four transistor discrete gain blocks. I suspect most of the tone would be in the iron. I could back into the mid band inductor tap values from the schematic, unless someone has taken one apart and measured it.
All in all, not too complicated. I could make a PCB for it if you wanted to DIY. Or I can make you a custom one.
|
|
|
Post by EmRR on May 22, 2019 9:03:00 GMT -6
Isn't there already a DIY 295?
|
|
|
Post by matt@IAA on May 22, 2019 10:33:06 GMT -6
If there is then rock and roll!
Also looking more closely at the schematic, the RC filters for the high and low shelf are a Baxandall configuration, I think.
|
|
|
Post by sean on May 22, 2019 10:45:36 GMT -6
I think the Roger Schult stuff is Siemens inspired.
|
|
|
Post by matt@IAA on May 22, 2019 11:03:06 GMT -6
I think the Roger Schult stuff is Siemens inspired. Looks like, almost certainly.
|
|
|
Post by matt@IAA on May 22, 2019 11:23:13 GMT -6
Also, am I the only one that gets an optical illusion of jacobs avatar as a popeye-lookin jacked guy? Attachments:
|
|
|
Post by ragan on May 22, 2019 11:56:08 GMT -6
Also, am I the only one that gets an optical illusion of jacobs avatar as a popeye-lookin jacked guy? Not the only one. That’s funny.
|
|
|
Post by jacobamerritt on May 22, 2019 13:21:15 GMT -6
Also, am I the only one that gets an optical illusion of jacobs avatar as a popeye-lookin jacked guy? Thats no illusion!
|
|
|
Post by jacobamerritt on May 22, 2019 14:15:58 GMT -6
Also looking more closely at the schematic, the RC filters for the high and low shelf are a Baxandall configuration, I think. Yes, I believe the Baxandall is what gives it some of the character, in addition to some specific transformers. Any idea how much it might cost to build a 2 channel version?
|
|
|
Post by matt@IAA on May 22, 2019 15:06:52 GMT -6
Depends on how "right" you want it to be.
The Bax portion is very simple - the most expensive part to "do it right" would be the switches. On the cheap, you could use pots.
The individual transistor gain blocks are not complicated, but the original transistors are unobtainium.
Same for the original iron. Out of curiosity, I called Cinemag and they haven't made them, or have any info on them...input, output, or the two inductors.
On the other hand, you could "interpret" the schematic. Maybe use a balanced amp for the input, then go discrete with the closest modern equivalent transistors. Use the original Q and frequency points, but change the other passives to use an off the shelf inductor, if possible. And use an off-the-shelf output transformer. It wouldn't be a clone, but the truth is a bax high and low tone control plus an inductor mid is going to sound cool no matter what active components you wrap around it. My opinion, anyway.
|
|
|
Post by wlinart on May 23, 2019 11:08:12 GMT -6
Isn't there already a DIY 295? Almost: A W492 exist:
And there is a project by forthmonkey, but it seems to me it's not the complete 295 eq:
|
|
|
Post by jamiesego on May 24, 2019 16:43:53 GMT -6
Also interested in this. I love the Sie-Q.
|
|
|
Post by lpedrum on May 26, 2019 13:32:16 GMT -6
The Sie-Q is often my go to on electric guitars when mixing. I'd be interested in a simple mono unit for tracking--500 series would be amazing! Chambord Audio perhaps?
|
|
|
Post by Bob Olhsson on May 26, 2019 15:00:09 GMT -6
It reminds me of the Neumann equalizers in one of our consoles at Motown.
|
|
ericn
Temp
Balance Engineer
Posts: 14,919
|
Post by ericn on May 26, 2019 17:12:32 GMT -6
It reminds me of the Neumann equalizers in one of our consoles at Motown. I think all those old German modules were built to a German Broadcast spec.
|
|
|
Post by Bob Olhsson on May 26, 2019 18:27:02 GMT -6
Most likely, they all have the same frequencies. The Neumanns were passive.
|
|
|
Post by matt@IAA on May 26, 2019 18:51:30 GMT -6
I did a 1RU pcb for it, now endeavoring to translate it to a a 500 series pcb layout. It’ll be interesting trying to get everything to fit.
|
|
|
Post by the other mark williams on May 26, 2019 19:27:19 GMT -6
I did a 1RU pcb for it, now endeavoring to translate it to a a 500 series pcb layout. It’ll be interesting trying to get everything to fit. The hard part for the 500 series will be finding an appropriate output transformer that can fit (600:600 gapped). This could be really cool. I, too, like the Sie-Q. Would be awesome to have something like it available in hardware.
|
|
|
Post by drbill on May 26, 2019 22:41:59 GMT -6
Full circle....
Hardware
Software emulating Hardware
Hardware emulating Software emulating Hardware.....
What will they think of next. Wacky....
|
|
|
Post by m03 on May 26, 2019 22:48:42 GMT -6
What will they think of next. Wacky.... I'm personally working on 500-series toaster slots. Maybe a single-character-wide 500-series teletype printer next, for that retro vibe.
|
|
|
Post by lpedrum on May 27, 2019 7:35:03 GMT -6
Full circle.... Hardware Software emulating Hardware Hardware emulating Software emulating Hardware..... What will they think of next. Wacky.... It makes total sense though. Software educates the ear to hardware that's inaccessible to most of us. Then when things reach critical mass talented builders work to recreate (in some degree) a hardware version for today's hybrid studios. It's the circle of life!
|
|
|
Post by the other mark williams on May 27, 2019 10:23:38 GMT -6
Full circle.... Hardware Software emulating Hardware Hardware emulating Software emulating Hardware..... What will they think of next. Wacky.... i don’t so much mean a piece of hardware to “emulate” the software Soundtoys has come up with. I more mean a piece of hardware that closely follows the hardware that the software is based upon. I have little doubt that the hardware would sound better than the software.
|
|
|
Post by matt@IAA on May 27, 2019 19:00:04 GMT -6
So this is the easy part. The hard part is finding the appropriate output transformer.
|
|