Topping Pre90 Preamplifier & Ext90 Input Extender Hi-Res Audio NFCA Modules 2RCA 4XLR Combination (Black, Pre90)

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.