Description
TOPPING Pre90 & Ext90 – Reference-Class Balanced Preamplifier System
Overview
The TOPPING Pre90 and its companion Ext90 expansion unit form a modular, reference-grade preamplifier system that redefines transparency and control in a compact form factor. Built on TOPPING’s award-winning amplifier architecture, the Pre90 delivers ultra-low distortion, high dynamic range, and precision relay volume control for audiophiles and studio professionals.
When combined with the Ext90, users gain four additional balanced inputs, transforming the setup into a complete control hub for multiple high-end audio sources — perfect for DACs, amplifiers, and active monitors.
Key Features
🎛️ Reference-Class Preamplification
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Ultra-low THD+N of 0.00006% ensures transparent signal amplification.
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Dynamic range > 145 dB, preserving every micro-detail of your source audio.
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Relay-controlled volume system for precise 0.5 dB step adjustments with zero channel imbalance.
⚙️ Expandable Input Flexibility (with Ext90)
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The Pre90 alone offers one XLR and one RCA input.
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Add the Ext90 to unlock three extra XLR + one extra RCA inputs for a total of four balanced and two unbalanced inputs.
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Perfect for multi-source setups — DACs, CD players, streamers, and audio interfaces.
🔊 Fully Balanced Design
🧠 Intelligent Control System
💎 Elegant and Robust Construction
Specifications
| Parameter |
Pre90 |
Ext90 |
| Inputs |
1× XLR, 1× RCA |
3× XLR, 1× RCA |
| Outputs |
1× XLR, 1× RCA |
– |
| THD+N |
< 0.00006% |
– |
| Dynamic Range |
> 145 dB |
– |
| Frequency Response |
20 Hz – 40 kHz (±0.1 dB) |
– |
| Volume Control |
Relay Attenuator (0.5 dB steps) |
– |
| Channel Balance |
< 0.3 dB |
– |
| Dimensions |
174 × 138 × 45 mm |
174 × 138 × 45 mm |
| Weight |
~1 kg |
~0.9 kg |
Why Choose TOPPING Pre90 & Ext90
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Studio-grade transparency: preserve pure sound from your DAC or source.
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Modular expandability: easily scale from two to six input channels with Ext90.
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Precision volume control using relay resistors — no digital compression, no imbalance.
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Balanced architecture ensures noise-free performance even in complex systems.
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Minimalist design, maximum performance — the ideal companion for TOPPING LA90, D90 III, or other high-end amplifiers.
