Topping Pre90 Preamp

Topping Pre90 Preamp

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Key info

Performance of Preamp has entered a new era.

All specifications

Physical characteristics
Dimensions (HxWxD) 4.5 x 16.0 x 22.2 cm
Specifications
Frequency Response SE IN/SE OUT 20Hz-100kHz (±0.1 dB) BAL IN/SE OUT 20Hz-100kHz (±0.1 dB) SE IN/BAL OUT 20Hz-100kHz (±0.1 dB) BAL IN/BAL OUT 20Hz-100kHz (±0.1 dB)
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
Inputs/Outputs
Outputs SE IN/SE OUT 20Ω | BAL IN/SE OUT 20Ω | SE IN/BAL OUT 40Ω | BAL IN/BAL OUT 40Ω

Ultra-High Performance NFCA modules

Pre90 uses the similar NFCA (Nested Feedback Composite Amplifier) module from flagship A90. Voltage Current hybrid feedback architecture along with UHGF (Ultra High Gain Feedback) technology provides excellent DC and AC performance. Ultra-low noise of 0.3uV is miles ahead of the competition, giving an absurdly high dynamic range of 145dB and no audible noise and darkest background.

Fully balanced amplifier structure for both balanced and single-ended signals

Pre90 adopts full balanced structure, which can handle balanced and single-ended signal processing. The output can be balanced, single-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 single-ended” or “single-ended to balanced” signal conversion.

A wire with amplification

An excellent preamp should have top performance, just like a wire that can amplify signals. As you can see, Pre90 did it.

Amplify the weak audio signal to acceptable level

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 mentioning that since the noise is as low as 0.3uVrms, this step does not bring in audible noise while amplifying the signal.

Relay volume control

A large number of high quality Japanese small signal relays are used for volume control of Pre90. Brings the advantages of precise control, remote control, longevity, and complete channel balance. If the volume was set high while turn on or switch in, Pre90 will automatically reduced to a safe volume to avoid your speakers/headphones blown by sudden high volume.

Safe Volume, so you don’t get shocked

The safe volume feature on Pre90 will kick in when the saved volume of the target input or output exceeds the set safe volume, and reduce the output to safe volume, protecting your expensive equipments and your priceless hearing. The safe volume function can be turned off in the settings.

Ext90 could extend you more inputs

A standard Pre90 provide you 1 x RCA and 1 x XLR stereo inputs. But when it working with a Ext90, they could provide totally 2 × RCA and 4 x XLR stereo inputs. This is enough for multi source systems.

Selectable XLR/RCA output

The output of Pre90 could be config to “XLR only”, “RCA only” or “XLR+RCA”. Therefore, the amplified signal can be connected to two different amplifiers.

Volume memory for every input or output

Pre90 could set volume memory for each input or volume memory for each output. When multiple inputs with different signal strengths are connected, switching the input often requires re-adjusting the volume at the same time. Pre90 can set volume memory for each input, and automatically adjust to the last volume setting when switching to that input. If Pre90 was set volume memory for each output, then the volume of “XLR output only”, “RCA output only”, and “XLR+RCA output” will be memorized to adapt to the needs of different amplifiers.

*Pre90 can only be set to memorize input volume or memorize output volume, not both.

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