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Appendix
Appendix C – Performance Specification
The following pages contain audio performance specification figures for the XLogic E Signature Channel unit.
No other Solid State Logic products are covered by this document and the performance of other Solid State Logic
products can not be inferred from the data contained herein.
Measurement Conditions
For each set of figures on the following pages, the specific unit and test setup will be stated at the beginning of
that section. Any changes to the specified setup for any particular figure(s) will be detailed beside the figures to
which that difference applies.
Measurement References
Unless otherwise specified the references used in this specification are as follows:
• Reference frequency: 1kHz
• Reference level: 0dBu, where 0dBu ≈ 0.775V into any load
• Source impedance of Test Set: 50Ω
• Input impedance of Test Set: 100kΩ
• All unweighted measurements are specified as 22Hz to 22kHz band limited RMS and are expressed in
units of dBu
• All distortion measurements are specified with a 36dB/Octave low pass filter at 80kHz and are expressed
as a percentage
• The onset of clipping (for headroom measurements) should be taken as 1% THD
• Unless otherwise quoted all figures have a tolerance of ±0.5dB or 5%
Microphone Input 1 (Transformer Coupled)
Measurement Conditions
Signal applied to Mic Input and measured at Output. Pad switched out and Mic Gain control set to +20dB.
Gain Continuously variable from +20dB to +70dB
Independently switchable 22dB Pad available
Input Impedance > 1.2kΩ
Output Headroom > +26dBu at onset of clipping
THD + Noise < 0.025% from 20Hz – 20kHz
(-12dBu applied, +36dB gain)
Frequency Response ±0.25dB from 20Hz to 20kHz
Equivalent Input Noise < –128dBu at maximum gain (input terminated with 150Ω)
Common Mode Rejection > 90dB from 50Hz to 1kHz
(-10dBu applied, +30dB gain) > 80dB at 10kHz