I've heard only good things about him. I think I've located the building that houses the Interface Electronics factory. I've love to make a video about more of the company history and Mr Stevenson. The mixers they made were next level custom mixers like I've never seen.
I used this mixer in location film/video work through the 1990's. I bought it used around 1989 for $3300. As I recall all the op amps were 4558 which could be upgraded to 5532, but the mixer was so quiet anyway that I never felt the need. Even the headphone amp(s) were directly driven by 4558's. Output transformers were optional and many were built without them, directly driving the line inputs of a stereo Nagra thru 4558's. The strip on the far right had buttons for voice-slating takes (with subtone if desired) or for talking to your boom operator with a duplex boom cable. Those meters were kind of useless as they had very slow ballistics and we relied on the Nagra metering anyway. Mine sat on shelf for 10 years after everything went digital, I recall selling it with power supply for $1500. The mixer could be powered with 12 volts using an outboard Stevenson DC-DC 12v-48v convertor built in small Bud-style box. The last movie I used mine on was "Any Given Sunday" director Oliver Stone. I was the 2nd Unit/Splinter mixer.
That is great to know! This is my second Stevenson Interface Electronics mixers. I have the 12v conversion box but no power supply. I think mine has 5532s in some locations but I'd have to look again. I know this one doesn't appear to have mic input transformers like my old 200 series. I think these are tough little mixers that sound good and have a lot of headroom. I wish I could use my 200 but it's a project I'll get around to eventually. Thanks so much for sharing!
I have yet to try it out but the 100 series Interface Electronics mixer sounded really good and unique. It has inductor EQs and mic input transformers, transformers on the buses(called Track on Interface mixers), and sounded very vintage but had a lot of headroom.
Burr Brown Mic Preamps and Beyer transformers the company is out of Houston Texas the only reason I know this is we used a similar mixer at the radio station I worked at for as a teenager for Remote location shows like car sales and basketball games. I use to hate when the DJ would tell me to pack him a case which meant get him everything he needed for the remote. I stayed at the station and put them on air from the studio. So they got a mixer 4 mics 8 cables, 4 mic stands, a folding table and a special telephone to connect to me it later became cellular around 1998/99 before that they had to use the business phone line. But those old Interface mixers are HEAVY!! But they were built for radio so it had to be military specs back then.
They are really cool mixers. The other Interface Electronics mixer I had is a 100 series. It definitely had the Beyer mic transformers and even some beefy output transformers on the 4 Track outs. This one is a bit newer and not as homemade looking as the older 100 series. I am telephone or broadcast use is what the other module marked 12 might be for. These are interesting mysteries. I probably grab any Interface Mixer I can. They are extremely unique and very high quality.
I have a power supply but I don't know if it works yet. It runs on 48 volts. The 100 series has an interval 33V supply. It looks like only 3 pins of the 5 pin XLR are used. I haven't been able to find my multimeter since I picked this one up to start checking voltages. There is an Interface Electronics Facebook group and that's how I figured out it's 48V. There were several posts about this model including mine.
I have the manual, complete with schematics. I also have the 5-pin power supply. I haven't tested anything but it's all there. Schematics include the power supply and a retail price list from 86. Let me know if you would like a copy of any or all of it. @@TwinCreekAudio
@@TwinCreekAudio I have the manual, complete with schematics. I also have the 5-pin power supply. I haven't tested anything but it's all there. Schematics include the power supply and a retail price list from 86. Let me know if you would like a copy of any or all of it.
@@jasonbiggs517 I would a copy of that. Thanks so much for letting me know. I'm love Interface Electronics stuff and plan to use this one for mobile video production work and maybe for submix duties in the studio. I have a 5 pin cable coming and the power supply I have tests good. Grady at twincreekaudio
@jasonbiggs517 Hi Jason, I just recently acquired a 200B/200M with no schematics and no PSU. I'm having a tech go through the desk, build a PSU, and add transformer iso'd direct outs. I happened to see this video and saw your post as well. Any chance I could get a copies of all the documentation? Happy to compensate you for those! -Pete
