is generic audio dual opamp (see NJM for datasheet). Aside from working at very low voltages (+/- 2V?) there is nothing special. RC Dual Audio Operational Amplifier. Operating Voltage. ┬▒18 V Low Noise Voltage. ┬ÁVrms (TYP) Wide GBW. 12 MHz (TYP) Low THD. % (TYP). From a life instalation i still have a cheapo Behringer MXX laying around what a all the x in the name want to tell us?.

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Started by StephenGiles Studio A. Started by Nat The Lab. Started by amphibic The Lab. Started by AudioJohn The Lab. From a life instalation opa,p still have a cheapo Behringer MXX laying around The desk has a good layout It sounds like a Behringer. Behringer denied to give out opanp Havent checked the master section yet. Allmost all op amps are NJM Basically the interna dont looks too bad The inputstage has 2 non smd transistors. The Filters have the standard asian darkgreen foil caps Just the faders are horrible I wonder if the source for the plastic behringer sound are just the cheap low power op amps Or have they done some nasty tricks to reduce noise that kills the sound anway olamp what op amps are doing the job?

Is the behringer sound just a result of a sloppy slewrate? Would replacing of all op amps and exchange of the powersupply against a heavier one, clear the situation and bring the behringer to an acceptable level?

Any opinions regarding what result to expect? Regardless the fact that its rather stupid to put that much work in a Behringer product What op amps would be good to replace the NJM? I am thinking about OPA I would need almost to replace all I pretty open to any suggestion that point to risks and problems i ve overseen Any good argument can stop me before its too late ;- Thats this is a pretty uneconomical project is clear But i am somehow currious if the whole thing about the behringer sound is really just lowpower op amps and small powersupplys that come with that Is it really just that easy?

Or are there hidden traps? Please dont olamp that i am crazy All my friends ask me if the Behringer is allready in the rubishcontainer and cant beliefe that i am thinking about putting work in it Just remember — if the world didn’t suck, we would all fall off.


Just paint it red opapm people don’t think it’s a behringer! What a circuit does add is as important as doesn’t add. You might be able to clean things up a little with op amps and caps and 45580 supply upgrades, but your not gonna get some warmth without transformers.

I’d probably try to find something the is alot easier to mod, with individual channel boards I’ve done this before Eric Eric’s Audio Repair http: Viitalahde Member Kuhmoinen, Finland Posts: But a real Neuman style summing would need theire activ transformer isolated fader modules This btw is done because regulations from official side The german engineers probably would have prefered to use less transformers in the signal path Actually i ve another candidate here The last east german desk The classic layout of a 24 in 8 desk with 6 aux and 2 semi para midbands Especially the pre amps are opamo At least in relation that they are build by just tl stages.

I wonder if these komunist tl are somehow a special bread Any senior east german chip developer around here? Its however an unfinished prototype with lots of things to do and huge I want my studio to be more like one big modular syntheziser for sounddesign and use other facilitys for mix down.

Is the source of the Behringer sound the NJM op amp?

So back to my behringer question I think i should try where i can make the bigges impact on the sound with specific op amps This all under the estimation that the thing is build like a soundcraft The smd board of the behringer dont allows many trys Honestly, I think it’s a waste of time.

No op-amp swaps will give you the sound you’re after. Then the whole build quality is horrible anyway and that thing won’t survive for more than a few years.

I wouldn’t put too much work for something that’s going to blow up anyway. The RFZ desk sounds interesting! Maybe you can buy an old and used soundcraft desk for the money?

I build a soundraft channelstrip some time ago, at the band practice I tried it on the singers vocals without telling anyone It sounded damn good. The non behringer sounds was hearable. Some time ago I tested the behringer mx, a mackie cfx and a phonic MRX for a magazine The behringer was the worst of all. The phonic with the opamps was much better. The sound of the mackie was the best of all. Maybe the RFZ sounds better than all the others? I bet if you ever did some modifications with a modular desk with seperated channels, you wouldn’t go the behringer-mod way.


Mendelt Member the Netherlands Posts: I guess without schematics your guess is as good as ours what opamp is best. I’m not really an electronics expert but I’ve read enough opamp-swap-threads here to know that swapping opamps isn’t easy and it usually doesn’t do much good.

These are the two problems i see with this: You can’t really compare two opamps and decide what opamp is best. Some opamps do some things better than other opamps. Usually the stuff around the opamp will do more for the sound than the opamp itself.


If you just put them in a circuit designed for cheaper opamps you can easilly make a stable circuit opzmp. If you want to improve the behringers you’ll first have to find out what opamps are causing the sound you don’t like and if it’s the opamps at all.

I am however interested to see what happens. That the win is little or even negativ fx occur when changing a working design so drastical is no surprise. But what happens to the mean uggly behringer when doing just simple things like opamp replacement and maybe bypassing some caps? A big step forward? A whole new sound?

Or also just the little fx you get from the usual we mod a neumann attempts? I have a MX If by the Behringer sound you mean noisy – and I mean ssshhhh noise sssshh yyy sssshhh and group inputs that suddenly stop working for no paticular reason and a 4508 that has blown up twice then yep – thats a sound. It looks like 16 4850 the Xenyx plus the headphone amp. So ideal chips would probably be something which wouldn’t cost 3x what the mixer did 450 you ended up needing a bulk of 20 or so while still being a sonic step up from the I realize there’s plenty of stuff out there which sounds better even in stock form.

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