Pre90/EXT90 parameters (@IN= 5Vrms Vol=0dB) THD+N： SE IN/SE OUT：<0.00007% BAL IN/SE OUT：<0.00007% SE IN/BAL Out：<0.00007% BAL IN/BAL OUT：<0.00007% @1kHz A-wt： SE IN/SE OUT：<0.0003% BAL IN/SE OUT：<0.0003% SE IN/BAL Out：<0.0003% BAL IN/BAL OUT：<0.0003% THD @20-20kHz 90kBW： SE IN/SE OUT：124dB BAL IN/SE OUT：124dB SE IN/BAL Out：124dB BAL IN/BAL OUT：124dB SINAD @1kHz A-wt SE IN/SE OUT：141dB BAL IN/SE OUT：137dB SE IN/BAL Out：145dB BAL IN/BAL OUT：138dB Dynamic Range @ 1kHz A-wt ： SE IN/SE OUT：141dB BAL IN/SE OUT：137dB SE IN/BAL Out：145dB BAL IN/BAL OUT：138dB Frequency Response： SE IN/SE OUT：20Hz-100kHz(+0.1dB) BAL IN/SE OUT：20Hz-100kHz(+0.1dB) SE IN/BAL Out：20Hz-100kHz(+0.1dB) BAL IN/BAL OUT：20Hz-100kHz(+0.1dB) OutPut Level SE IN/SE OUT：25Vpp BAL IN/SE OUT：25Vpp SE IN/BAL Out：50Vpp BAL IN/BAL OUT：50Vpp AP measured noise level @A-wt: SE IN/SE OUT：<0.7uVrms BAL IN/SE OUT：<0.7uVrms SE IN/BAL Out：<0.9uVrms BAL IN/BAL OUT：<0.9uVrms Actual noise level*@A-wt: SE IN/SE OUT：<0.3uVrms BAL IN/SE OUT：<0.3uVrms SE IN/BAL Out：<0.6uVrms BAL IN/BAL OUT：<0.6uVrms Channel Crosstalk @1kHz SE IN/SE OUT：-130dB BAL IN/SE OUT：-137dB SE IN/BAL Out：-140dB BAL IN/BAL OUT：-140dB Channel Balance: SE IN/SE OUT：+10dB- -60dB ±0.5dB BAL IN/SE OUT：+10dB- -60dB ±0.5dB SE IN/BAL Out：+16dB- -60dB ±0.5dB BAL IN/BAL OUT：+16dB- -60dB ±0.5dB IMD CCIF @( 18kHz+ 19kHz)： SE IN/SE OUT：-115dB BAL IN/SE OUT：-115dB SE IN/BAL Out：-115dB BAL IN/BAL OUT：-115dB IMD SMPTE @(60Hz+ 7kHz)： SE IN/SE OUT：-115dB@SMPTE4:1 BAL IN/SE OUT：-115dB @SMPTE4:1 SE IN/BAL Out：-115dB@SMPTE4:1 BAL IN/BAL OUT： -115dB@SMPTE4:1 Input Sensitivity： SE IN/SE OUT：9.2Vrms @0dB BAL IN/SE OUT：9.3Vrms @0dB SE IN/B
Pre90 adopts full balanced structure. The output can be balanced, sin- gle- ended, balanced + single- ended.
With the balanced + single-ended two-way input, in addition to the normal preamplifier usetage
Pre90 can be used for "balanced to sin- gle- ended" or“single -ended to balanced" signal conversion.
With the help of maximum gain +16 dB, Pre90 could easily amplify the weak input signal to acceptable level of next amplifier.
It is worth men- tioning that since the noise is as low as 0.3uVrms, this step does not bring in audible noise while amplifying the signal.
