Topic: MMA6000/R1 - Has the rolloff/impedance been determined?

[deadhoarse]

The value of rolloff depends on the input of the recorder, and there have been posts detailing the values of the standard coresound and soundpro's battery boxes, as well as the input values of various recorders (M1, JB3, etc).

Has anyone cracked open a DPA MMA6000 to figure out what DPA based the 100Hz/12db rolloff against?  Also, has anyone determined what the input impedance is on the line-in of an R1?

[pfife]

I can test it, if someone tells me what to do... I don't know anything about these matters.

[deadhoarse]

I can test it, if someone tells me what to do... I don't know anything about these matters.

It would require opening the device and finding out what the values of the capacitors are.

[pfife]

I can test it, if someone tells me what to do... I don't know anything about these matters.

It would require opening the device and finding out what the values of the capacitors are.

damn... sorry dude... I'm way too afraid to do that.

[madman]

Is the mma6k built tougher than a DPA battery box?  If it's as easy to open, I'll crack mine open when it arrives.

[KingReptile]

I have run the MMA 6000 with a D-100 numerous times..I never run the roll-off anymore,It has killed a few tapes.Its a whole lot easier taking bass out than adding it..

[joolz]

yeah, its too steep, if you have a bass influenced music. Its nice for cleaning up room noise in acoustic music, where theres not much risk of losing anyting below the hpf specs!

hey moke, I use DPA4061's (CS-HEB's) with a PZane BB roll-off mod, which I have been using. The last recording I did was in a smallish UK club-type venue and although its definitely the best I've recorded so far, the highs did seem a bit too pronounced, compared to lows. Do you suggest not using the roll-off option?

[joolz]

by that description, yes.
I don't know that unit, or its capabilities.

I really like something around -6dB@75hz.
The mma6000 scheme of -12dB@100hz would be nice at half that steepness (-6dB@100).
At -6dB, you have a nice rolloff through the boominess of the 60hz range. By the time you get to the 60hz boominess range at -12dB, you really aren't hearing a lot of the low bass register.

I accidently ran the mma6000 hpf during one recording, and really didn't care for it.

OK, thanks. I'm not too sure on the specs of the roll-off, I bought used.

[bluntforcetrauma]

i would worry about bass in post production.

[madman]

Bah...the MMA6k is sealed up pretty nice, looks like it has little rubber bits over the screw holes.  No sense taking them off to crack it open.  I may put up some MMA vs DPA battery pack picks for anyone interested in size comparisons.

[pfife]

Bah...the MMA6k is sealed up pretty nice, looks like it has little rubber bits over the screw holes.  No sense taking them off to crack it open.  I may put up some MMA vs DPA battery pack picks for anyone interested in size comparisons.

please do!  I'm considering getting a battery pack for stealthier situations! +T

[grider]

with regard to the bass roll function of the mma6000, I chose not to use it last week for Digable Planets, which I stealth taped, because I read a post here saying that the DPA4061 mics are high enough quality to handle bass in recordings that other lesser mics cannot; my Digable Planets proves this statement to be untrue, my recording is unlistenable it has so much bass and low end in the recording, and from now on any band I tape with this gear that is even marginally bass heavy will be recorded with the bass roll off function engaged

[pfife]

I think I've been in situations where it woulda been overloaded too... but the NJB3 died, so I never knew.  That evening there were like 8 tapes going at the Blind Pig in Ann Arbor for Duo, and 6 or so got crushed for a variety of reasons, but mostly b/c of the bass.

[deadhoarse]

OK, thanks. I'm not too sure on the specs of the roll-off, I bought used.

The PZane (Zach Payne) battery boxes for the DPA 4061 mics roll off at -6dB@85hz.  But, Zach would make the boxes specific to the input of the device that the taper was using, so you may get different results depending on what the previous owner used.  He made my battery box specific to my Minidisc recorder's line-in, I since built a new box specific to my M1 DAT.

You can figure out what your box rolls off at by the values of the capacitors in your box, but Zach would cover the capacitors with glue, so you won't be able to tell...