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Gear / Technical Help => Microphones & Setup => Topic started by: scoper on April 02, 2006, 01:53:53 PM

Title: SP Battery Box vs Sanjay Battery Box - 5db net loss
Post by: scoper on April 02, 2006, 01:53:53 PM

I knew there would be a loss in gain when using the new "Sanjay" box vs my old Soundpro battery box, so I ran a quick test, using the 1/8" input on the MT at "M" sensitivity. Mics were 1" from the speaker, volume was not changed on either the MT or the stereo between segments. Levels on the SP box were at maximum, which still provides some slight attenuation. Stereo was set at a very modest volume, so as not to disturb other family members.

The net loss is about 5db, which is less than I expected. Here are the respective analyses from Adobe Audition

AT853 omnis > Sanjay BB > MT:

   Left   Right
Min Sample Value:   -4109.32   -3545.87
Max Sample Value:   3682.54   3143.16
Peak Amplitude:   -18.03 dB   -19.31 dB
Possibly Clipped:   0   0
DC Offset:   0    0
Minimum RMS Power:   -34.85 dB   -36.04 dB
Maximum RMS Power:   -27.59 dB   -28.86 dB
Average RMS Power:   -31.03 dB   -32.4 dB
Total RMS Power:   -30.96 dB   -32.33 dB
Actual Bit Depth:   24 Bits   24 Bits

Using RMS Window of 50 ms


AT853 Omni > minixlr to 1/8" dongle > Soundpro BB > MT
   Left   Right
Min Sample Value:   -6672.24   -5195.29
Max Sample Value:   7291.43   5677.31
Peak Amplitude:   -13.05 dB   -15.23 dB
Possibly Clipped:   0   0
DC Offset:   -.001    -.001
Minimum RMS Power:   -29.66 dB   -31.42 dB
Maximum RMS Power:   -23.24 dB   -25.12 dB
Average RMS Power:   -25.91 dB   -27.85 dB
Total RMS Power:   -25.86 dB   -27.8 dB
Actual Bit Depth:   24 Bits   24 Bits

Using RMS Window of 50 ms

Title: Re: SP Battery Box vs Sanjay Battery Box - 5db net loss
Post by: poorlyconditioned on April 08, 2006, 03:06:46 AM

Quote from: scoper on April 02, 2006, 01:53:53 PM

I knew there would be a loss in gain when using the new "Sanjay" box vs my old Soundpro battery box, so I ran a quick test, using the 1/8" input on the MT at "M" sensitivity. Mics were 1" from the speaker, volume was not changed on either the MT or the stereo between segments. Levels on the SP box were at maximum, which still provides some slight attenuation. Stereo was set at a very modest volume, so as not to disturb other family members.

The net loss is about 5db, which is less than I expected. Here are the respective analyses from Adobe Audition

AT853 omnis > Sanjay BB > MT:

   Left   Right
Min Sample Value:   -4109.32   -3545.87
Max Sample Value:   3682.54   3143.16
Peak Amplitude:   -18.03 dB   -19.31 dB
Possibly Clipped:   0   0
DC Offset:   0    0
Minimum RMS Power:   -34.85 dB   -36.04 dB
Maximum RMS Power:   -27.59 dB   -28.86 dB
Average RMS Power:   -31.03 dB   -32.4 dB
Total RMS Power:   -30.96 dB   -32.33 dB
Actual Bit Depth:   24 Bits   24 Bits

Using RMS Window of 50 ms


AT853 Omni > minixlr to 1/8" dongle > Soundpro BB > MT
   Left   Right
Min Sample Value:   -6672.24   -5195.29
Max Sample Value:   7291.43   5677.31
Peak Amplitude:   -13.05 dB   -15.23 dB
Possibly Clipped:   0   0
DC Offset:   -.001    -.001
Minimum RMS Power:   -29.66 dB   -31.42 dB
Maximum RMS Power:   -23.24 dB   -25.12 dB
Average RMS Power:   -25.91 dB   -27.85 dB
Total RMS Power:   -25.86 dB   -27.8 dB
Actual Bit Depth:   24 Bits   24 Bits

Using RMS Window of 50 ms

Nice work and +T.  That sounds reasonable, about -6 to -10dB loss.  But a lot nicer sound, and tolerant to loud volumes.  So, if you're at very quiet shows, run the SP batt box I guess.  Otherwise use the 3-wire one.

  Richard