Product Description:
This unit is inspired by the tone control section of the British NAD3020 amplifier, featuring a meticulously designed layout and a premium all-aluminum chassis (volume knob made of solid aluminum). It includes 2-channel audio signal input switching, gold-plated RCA connectors, and a star-grounding wiring method for high signal-to-noise ratio. Assembled with audiophile-grade components, the circuit employs a single-ended Class A amplification design, using ON Semiconductor's high-gain (HFE) audio-specific transistor pairs: 2SA992/2SC1845.
Key components include Nichicon and Panasonic electrolytic capacitors, military-grade 718 factory copper-pin metal film resistors, and a 20W high-end toroidal transformer (copper wire, Grade A silicon steel). Power is regulated by LM317/337 precision voltage regulators, while the volume control uses a genuine Japanese ALPS 16-type high-quality potentiometer. The tone controls feature 2 Taiwan-made SONG premium potentiometers, ensuring durability and excellent performance.
The standout feature of this tone control is its ability to adjust highs and lows without affecting the midrange. The bass is powerful and elastic, while the highs are detailed and non-fatiguing. The sound is rich and highly enjoyable, far surpassing op-amp-based tone controls—it’s in a league of its own!
Specifications:
- Circuit Gain: 8x
- Treble Adjustment Range: ±10dB
- Bass Adjustment Range: ±15dB
- Signal-to-Noise Ratio (SNR): Even with tone and volume pots at maximum, only a faint noise is audible when your ear is close to the speaker.
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Usage Notes:
- The NAD preamp uses an OTL output stage, so always power on the preamp before the power amp and power off the power amp before the preamp to avoid switching noise.
- Not compatible with very tight RCA plugs (e.g., Monster cables), as they may damage the RCA sockets.
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Dimensions and Weight:
- Dimensions: 165mm (W) x 210mm (D) x 75mm (H)
- Weight: Approximately 2.15kg (including packaging)
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Voltage Options:
- 115V/230V 50Hz (selectable). The 115V version is suitable for regions like Taiwan, the USA, and Japan.
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Before Purchase:
- Power cable is not included.
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This preamp is a true audiophile gem, combining vintage design with modern performance for an unparalleled listening experience!
