Re: Level mismatch solutions - fixed and variable attenuators

End of last year I made a passive box for my friends ff800 based on a quad GoldPoint stepped attenuator.  I convinced him to go RME, and so when he noticed the interface doesn't have a dedicated volume knob for output I jumped at the chance to keep him hooked, and to avoid the shortcomings of Mackie and TCe 'solutions'. His is much nicer than the one I built for myself around 2005 or so.
https://drive.google.com/file/d/1dNiu-bjXIqqxFDiofk_YU3bOiEqlF1Y4/view?usp=sharing
https://drive.google.com/file/d/1XK93ILbe0jxPZej1T_52Oi6kcad8HNaS/view?usp=sharing

My old trusty/dusty unbalanced version:
https://drive.google.com/file/d/1H2HCC4zWl-xZz4kgwj-gGNdQHcQOuwfL/view?usp=sharing

52 (edited by thesimulacre 2020-12-29 04:35:05)

Re: Level mismatch solutions - fixed and variable attenuators

Here's a couple more shots:
https://drive.google.com/file/d/1qOXPcwDEWqxIiMH2qPBO0z7esI1bee7o/view?usp=sharing
I tore up some Mogami cable to do the wiring and my friend with a laser CNC helped me with the Walnut panel cutouts. The case was a part from some kind of heavy-duty outdoor lighting that I hack-sawed in half, and the knob is a lid from a jar with a smaller knob glued inside.
https://drive.google.com/file/d/15Z8hDKU-RReNEyATaWhcmcQDVXQZ-Z8d/view?usp=sharing
I had used some off-cuts from the laser process to make a stand for vertical orientation, but it was too delicate for my friends heavy-handed music madness times.

Re: Level mismatch solutions - fixed and variable attenuators

what an amazing post !!! it solves several issues of mine by one.
Had a hiss in certain situations, always had to monitor at -30db main etc blabla.

I bought the JTS MA-123 (thomann German site https://www.thomann.de/de/jts_ma_123.htm)inserted directly between the balanced cables and the speaker input and voila !!!!!

...no hiss + monitoring up to 0 db with the speakers even cranked possible + cheap headphone out into the Fireface UFX I with a Y-cable creating a tinitus like sound....gone.

its just amazing !
best invest in my past 25 years !

Re: Level mismatch solutions - fixed and variable attenuators

Although not really needed I also bought this. I made the experience too often that good products come and go.
But once  needed they are not available anymore.. wink

BR
Ramses
X10SRi-F, E5-1650v4, Win10Pro20H2, Cub11Pro, UFX+ (v0.9735), XTC, 12Mic, ADI-2 Pro FS R BE

Re: Level mismatch solutions - fixed and variable attenuators

Really interesting stuff. I'm having the same issues with my BFpro fs. Output is super hot, monitors turned down as low as they can go. It's workable until some random system sound blows them off their stands. So I took your sound advice and spent £40 on the JTS attenuators. All good.......
Then I had a skim through the manual and game to this little nugget tucked inside page 45

Setting the reference level of both XLR outputs is done by a sliding switch on the bottom of the device (+4 dBu or +19 dBu

I'd never seen that before so I flipped it over and holy shit there it was.
Switched it to +19 and problem solved. Gonna have to return the attenuators, that haven't even arrived yet.

WHY did nobody mention this switch in that whole thread? Is it a recent addition to the hardware?
Herr Carstens, you need to update your thoroughly informative post
https://forum.rme-audio.de/viewtopic.ph … 42#p120442

Re: Level mismatch solutions - fixed and variable attenuators

Cool.
That applies only to the Babyface pro or to which others  as well ?

57

Re: Level mismatch solutions - fixed and variable attenuators

The switch is a major feature of the BF Pro 'FS' update.

Regards
Matthias Carstens
RME

Re: Level mismatch solutions - fixed and variable attenuators

Now I don’t read manuals end to end until I need to but I always check out every physical switch,slider, socket, wheel on a device. Even then I’d check the manual and physically before I started spending money.

Re: Level mismatch solutions - fixed and variable attenuators

I don’t read manuals end to end until I need to but I always check out every physical switch,slider, socket, wheel on a device.

I know, I know...I should have spotted it. In my defense, it is a really feckin small switch.

Re: Level mismatch solutions - fixed and variable attenuators

Hi fellows! I wan't to build a simple attenuator between my Babyface and my Dynaudio Lyd5. I don't get it though, should I always use a "H pad" if I want connections to be balanced?
http://www.uneeda-audio.com/pads/

Thanks! smile

61

Re: Level mismatch solutions - fixed and variable attenuators

That link names the correct version as U, not H.

Regards
Matthias Carstens
RME

Re: Level mismatch solutions - fixed and variable attenuators

Oh thanks a lot for putting your pipe down and answering. I was a bit puzzled....

Re: Level mismatch solutions - fixed and variable attenuators

I'm having a variant of this issue, with my sennheiser hd600 conencted to my BFpro headphone out. All meters close to the bottom, the output meter on the interface never goes above 1 led. Any recommendations on how to resolve this issue?

64

Re: Level mismatch solutions - fixed and variable attenuators

Use a mini TRS to TRS connector so you can plug the Senn into the small TRS output. This reduces volume by 6 dB. If still too loud then you are an extreme case of low volume listener. But there is help: The attenuators described in post 1 are also available as low impedance headphone versions. Google 'headphone attenuator'. They don't change the sound, just take away volume.

Regards
Matthias Carstens
RME