K.3 Performance Specification
The following pages contain audio performance specification figures for the X-Rack E Series EQ Module.
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.
K.3.1 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.
K.3.2 Measurement References
Unless otherwise specified the references used in this specification are as follows:
• Reference frequency:
• Reference level:
• Source impedance of Test Set:
• Input impedance of Test Set:
• 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%
• All measurements are made with the operating level switch set for +4dBu
K.3.3 Performance
Signal applied to Input and measured at Output. EQ switched In. All EQ controls set centre as appropriate.
THD + N
Frequency Response
Output Headroom
Noise
1kHz
0dBu, where 0dBu ≈ 0.775V into any load
50Ω
100kΩ
< 0.003% at +20dBu 1kHz
< 0.003% at +20dBu 10kHz
±0.5dB from 20Hz to 20kHz
–6dB at 100kHz
> +26dBu at onset of clipping
< –80dBu (+4dBu operating level)
< –92dBu (–10dBV operating level)
X-Rack E Series EQ Module
Page K-3
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