TOPPING PRE90 Preamplifier & EXT90 Input Extender

Topping introduces the Pre90 preamplifier and Ext90 input extender, complementing the A90/D90 flagship audio chain.

Premium NFCA Amplification: Featuring the premium NFCA module, akin to the A90, the Pre90 delivers exceptional performance with Voltage Current Hybrid Feedback Architecture and Ultra-High Gain Feedback, ensuring distortion-free signal amplification.

Ultra-Low Noise Floor: With a chipset providing a noise floor below 0.3uVrms and a dynamic range of 145dB, the Pre90 ensures noise-free sound output, creating a rich, dark background for an immersive audio experience.

Safe Volume and Precise Control: The Pre90 features a safe volume option to prevent damage from sudden high volumes. The Volume Relay, comprising premium Japanese relay components, allows precise 0.5dB volume adjustment, making it ideal for HiFi speaker systems.

Fully Balanced with +16dB Gain: The fully-balanced Pre90, using NFCA like the A90, achieves a dynamic range of 145dB with no audible noise. Its +16dB gain amplifies even weak signals to the receiving amplifier.

Dual-Amp Configuration: Configurable to run to XLR only, RCA only, or XLR+RCA, the Pre90 allows seamless transitions between two amps without constant cable switching.

Functional Remote Control: The Pre90 comes with a fully-functional remote for easy control, allowing adjustments from volume to gain and user settings, including saving specific volume configurations.

Ext90 Expands Input Options: The Ext90 allows seamless connection of multiple sources. With one RCA and one XLR input, extend connectivity to two RCA and four XLR inputs. The active source is easily selected with the remote, and volume settings are remembered for different input/output ports.

Grand Central Station of Audiophile Setups: Together, the Pre90 and Ext90 transform the 90 stack into a hub for audiophile setups, connecting additional sources, outputting to multiple amps, and enhancing versatility.

Specifications:

THD+N: <0.00007% @1kHz A-wt
THD: <0.0003%@20-20kHz 90kBW
SINAD: 124dB @1Khz A-wt
SNR
SE IN/SE OUT: 141dB @1kHz A-wt
BAL IN/SE OUT: 137dB @1kHz A-wt
SE IN/BAL OUT: 145dB @1kHz A-wt
BAL IN/BAL OUT: 138dB @1kHz A-wt
Dynamic range
SE IN/SE OUT: 141dB @1kHz A-wt
BAL IN/SE OUT: 137dB @1kHz A-wt
SE IN/BAL OUT: 145dB @1kHz A-wt
BAL IN/BAL OUT: 138dB @1kHz A-wt
Frequency response: 20 - 100,000Hz (+/-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): -115dB
IMD SMPTE @(60Hz+7kHz): -115dB@SMPTE4: 1
Input sensitivity
SE IN/SE OUT: 9.2Vrms@0dB
BAL IN/SE OUT: 9.3Vrms@0dB
SE IN/BAL OUT: 9.2Vrms @0dB
BAL IN/BAL OUT: 9.3Vrms@0dB
Volume range
SE IN/SE OUT: +10db - -99dB
BAL IN/SE OUT: +10db - -99dB
SE IN/BAL OUT: +16db - -99dB
BAL IN/BAL OUT: +16db - -99dB
Output impedance
SE IN/SE OUT: 20Ω
BAL IN/SE OUT: 20Ω
SE IN/BAL OUT: 40Ω
BAL IN/BAL OUT: 40Ω
Output DC Configuration: <1mVrms

Packing list:
Pre90 contents list
1x Pre90 Preamplifier
1x remote
1x AC cable
1x user manual
1x warranty card
Ext90 Contents list
1x Ext90 input extender
1x aviation connector cable
1x user manual
1x warranty card