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S/N Ratio?
Old 20th November 2009
  #1
Gear Addict
 
🎧 10 years
S/N Ratio?

Is 60db on a preamp spec on a recorder crap?
Old 20th November 2009
  #2
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The MPCist's Avatar
 
🎧 15 years
But does it sound good? That's the question I'd have.
Old 20th November 2009
  #3
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brianroth's Avatar
 
🎧 15 years
Quote:
Originally Posted by supoUSA ➡️
Is 60db on a preamp spec on a recorder crap?
Without any context, it's just a meaningless number.

Bri
Old 20th November 2009
  #4
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nosebleedaudio's Avatar
 
🎧 15 years
Quote:
Originally Posted by supoUSA ➡️
Is 60db on a preamp spec on a recorder crap?
That's in the typical range, depending on other factors, tape level, noise measurement "A weighted" ect...
Some machines were not that good, in the 50's..
Tape speed also is a factor.
Old 20th November 2009
  #5
Gear Guru
Quote:
Originally Posted by supoUSA ➡️
Is 60db on a preamp spec on a recorder crap?
Yes. If the gain is +60 db, the EIN would be -120 db, not so good. A good transformer design can best that by 7 db, transformerless can beat it by over 9 db at 150 ohms source impedance. Lower that source impedance and it gets even better.

Jim Williams
Audio Upgrades
Old 20th November 2009 | Show parent
  #6
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Geoff_T's Avatar
 
🎧 15 years
Hi

It is a meaningless number unless the gain it is measured at is also mentioned, plus the bandwidth of any filtering, and input termination value, etc., etc.

There are some specs on equipment that are almost comical because of the lack of other data. I have seen at least one pre amp quote 90dB as their noise spec. At 0dB gain or 60dB gain or what... it's just lies, damn lies, and audio specs.

It doesn't help that there are two schools of thought... the one I was used to at Neve where noise was relative to 0dBu so you got realistic figures... or the one that power amps and digital stuff uses where the noise is the amount below the clipping point.

I can recall one power amp with amazing noise specs that I could hear the hum ten feet away from the monitor speaker!

Lies, damn lies, and audio specs.

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