DynosBM6A + Why dont you like subs?

  • Thread starter Thread starter 5ergo
  • Start date Start date
What im saying is that its not going to be acurate with any mic except a mic made for that purpose. That mic has its own frequency response and it probably even has a dip at 1Khz. That is why it is a darker mic and handles screams better.

So how can you be sure you are getting room measurements if the mic is making that much of a dip to your signal. Your probably just picking up the frequency spectrum of the SM7.

Get a measurement microphone like a cheap Behringer ECM8000 and youll have better results. Even this might not be perfect because who knows if its flat in the rest of the chain but it will be much more accurate than an SM7.

If you really have a -10DB dip at 1Khz...you are in one horrible room. I can imagine those kind of dips down under 300Hz buts its going to be rare to find such a node that high up. I guess its possible though.

Also everything in your chain effects the frequency response your going to get from that CD. If you look at the mics frequency response it starts to dip around 600Hz and then flattens out at around 1khz but then boosts around 4khz. Its really only within a 3db range but thats enough to be inaccurate. Also what is the process of this. Just because it says -10 on your meters on both the preamp and the CD doesnt mean theres a -10 dip there. It just means thats the level of your preamp. The idea is to get the average of the frequencies. If everything is at 0dbs which is shouldnt because that would be clipping your preamps and it would un-usable in this situation, but if everything was 0 then all of a sudden there was a -10 dip at 1khz then you would have a dip -10dbs at 1khz. But if it averages say -5dbs through out the sequence and then the level is -10dbs at 1khz then its really only a 5db dip, then at 4khz it might boost 5dbs. So that is a 5db boost in that frequency from the average. Understand what im saying?

This would all make sense with the microphone your using. What monitors are you using? Because this could greatly effect this also. If your using home speakers then for sure you could have some problems like that. But im guessing your arnt because of the thread here. But even the monitors might have a -1 db dip at 1khz. Then you add that to say the microphone, the cables your using, the preamp that might have a dip there also, and then finally the room acoustics causing an effect then yes it is very possible to get a -5db boost there but i think the biggest cause would be equipment and not room acoustics in that area.

Danny

Danny
 
Last edited:
thanks for the inputs..i pm'd you with some details,
as this wasn't the thread.
(edit: just a final post here on DIY SPL.... darnold was absolutely correct.
i re-ran a few different mic's and the response was totally different. [same CD,same speakers etc..]
 
Last edited:
I got a new Presonus and the humming is gone but one issue remains.

Its when i connect CDP or soundcard (Revo7.1) to Presonus via SPDIF.I get peak up to red though playing at very low volume.And yes i set Revo to 44.1kHz.Its really strange since i tryed with Vivanco and Klotz SPDIF cable which are 75Ohm both of course.
Do you guys have any idea for a solution?
I doubt its Presonus cause its the same on both (the ex and the one i use now).


I stopped bothering with the problem and plugged CDP to Presonus via analog cables.
Jup they are fine though i cant tell much now cause i need to burn them in.How many hours do they need?
 
I am not sure about the presonus specifically, but red may not necessarily be bad. SOme units have red to indicate an actual clip, whereas other units may use red for the last 6 or 3 db's just to let you know you are close to clipping. Many commercial CD's will go right on up to the clip level but never actually go over. Some Commercial CD's will actually clip as well. With the analog cables you may be actually attenuating the sound.
 
EDIT:I found out that i forgot to lower Foobars volume :rolleyes:

As for NAD i think it has a defected spdif and optical out.We tested Presonus and its ok so its not causing the problem.

Hey is there any difference if connecting CDP such as NAD C542 to Presonus via digital and optical output?
 
Last edited:
There should not be. It would be kind of like connecting either TRS or XLR. However, if there is a problem with your coaxial s/pdif out, there is a chance that the optical may work better. However, in general, they are basically paralleled from the same conversion process and the problem is usually further upstream than that, but ya never know till ya try:D
 
Thanks.
Hey im not sure if i understand the EQ on bm6a correctly.If i set LF on -4dB does this mean i get less (bass) output but more depth?

What about the +4/-10 option, why is it usefull?

My monitors sound much better than bookshelfs (also Dynaudio) in my small room.Sound is still a bit boomy but nothing compared to the bookshelfs.
 
I've never used a satellite & subs combination, never really heard a system properly. I've thought in the past about maybe purchasing some small Genelecs or Dynaudios and a sub though. Then last week I went to a friends studio and he had a pair of M&K's with a sub, I hated them !! Loads of bass but wooly, muddy and unfocused, no thank you. It is a professionally designed room in a very well respected facility so the room isn't a problem plus I've heard several monitors in their and they sound wondefull. Anyway my mate loves em so I smiled and agreed and went home and kissed my Tannoy DMT15's and made a note never to get seduced by a satellite/sub system what ever name is on the front :) :)
 
You must log in or register to reply here.
Back
Top