I recently got an MD421-2 off ebay, even though the sticker must have come off because it doesn't say so on the mic. But I guess it's correct since it has no low cut switch of any kind.
Immediately after receiving it I stuck it in front of a guitar amp.
A pretty low-end heavy guitar amp I might add.
Listening back to the track, it seems like the mic is lacking a lot of low end. For some reason it sounds kind of thin.
However, I have no previous experience with MD421's, this is the first time I'm actually using one. So I have no clue what it's supposed to sound like.
Looking at a frequency inspector I see a lot of 100hz but below that it drops off rapidly. At first I thought hmm that's the low cut filter. But then I realized, mine doesn't have one!
Then I started reading about it and found that it's somewhat of a common problem that 421's lose their low end if they start to die.
I am seriously in doubt wether it is defective or not. Because after all, there isn't much below 100Hz on a guitar anyway.
So what do you think. Is that the natural sound of an md421? (strong focus on mid and especially high's?) and is it just me beeing shocked by not hearing my guitar thru that honky sm57? or is there actually a shot of it beeing broken?
At first I thought hmm that's the low pass filter. But then I realized, mine doesn't have one!
(I believe you mean high pass filter)
Also, if it's an MD421, it does have a high pass. It's located at the base, near the XLR connection. It should be a 5 position rotary switch that goes from S ('speech', high pass enabled fully) to M ('music', no high pass)
There should be a sticker on the mic under where the clip goes in... and there should be a rotary switch at the back of the mic near the output XLR connector [unless its a cream colored one - in which case I'm not sure if it has that rotary switch or not].
If it doesn't have the sticker and the rotary switch... then if very well could be a "Chinese knockoff" microphone. I am pretty sure I heard of those being made / confiscated as well as Shure 57 & 58 knockoffs.
FWIW - I've rarely found 421's to be great for guitar... unless you really love a festival of 3kHz in the sound in which case they're awesome.
in that case id say either send it to your sennheiser distribution company or to an experienced mic repair guy.
i really suggest Peter Drefahl in Germany, he usually does stuff in no time and at affordable rates.
He has probably seen more 421s than any of us..