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Isa one & coles 4038
Old 24th November 2012
  #1
Gear Nut
 
Bobelix's Avatar
 

Isa one & coles 4038

will get my isa one digital on monday.

does the isa one come with enough gain for the coles 4038?
Old 25th November 2012
  #2
Quote:
Originally Posted by Bobelix View Post
will get my isa one digital on monday.

does the isa one come with enough gain for the coles 4038?
Kinda depends on what you're recording.

The ISA One has 60dB of stepped gain plus another 20 dB of variable gain adjustment for 80 dB total. That should be more than enough for even the low output of a 4038 for almost any moderate sound source.

The 4038 output level is -65 dBv at a 94 dB SPL (1 Pa)

With the ISA turned up to full gain, you should be able to achieve full scale output from the ISA One (0 dbv) at a SPL of 79 dB. That's an acoustic guitar played at a moderate level or a very quiet singer who is not too close to the mic.

At that gain the ISA One noise (hiss or equivalent input noise) will be (-126dBu +80dB gain or -46 dBu) The noise will be audible during quiet passages.

In comparison, a AKG 414XLS has an output of -34 dBv at a 94 dB SPL (1 Pa), so the Coles is 31 dB less sensitive than the 414XLS.

If you can record a given sound using a gain setting of 40 dB on the ISA One with the 414XLS, then then you will have to increase the gain to 71 dB to reach the same recording level with the Coles.

The quietest signal you can record will be limited by the mic/preamp EIN (equivalent input noise) rather than available gain. A FetHead or a CloudLifter at the mic may improve the S/N ratio by a few dB, and will let you reduce the Focusrite gain by 20 to 26 dB at the same sound pressure level.
Old 25th November 2012
  #3
Lives for gear
 
sleepyhollos's Avatar
consider yourself told!
Old 25th November 2012
  #4
Gear Nut
 
Bobelix's Avatar
 

acoustic and electric guitars, male vox, mono drums

thanks for the detailed answer, i take it as a yes ;-)
Old 25th November 2012
  #5
Quote:
Originally Posted by Bobelix View Post
acoustic and electric guitars, male vox, mono drums

thanks for the detailed answer, i take it as a yes ;-)
Strong yes on the electric guitars, male vox, mono drums - no problem. Acoustic should be fine unless played very softly, but you wouldn't need high track levels for that anyway.

Usually feel more info is better than not enough, but sometimes, as Mies van der Roh said "Less is more."
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