PreOwned PS Audio BHK Signature Preamplifier 110V
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PS Audio BHK Signature Preamplifier - Pre-Owned
Original Box not available. Comes only with the Amplifier and the 110V Transformer.
Condition: Pre-owned unit sold as-is. Test in our showroom before purchase. No refunds on pre-owned units.
Design Philosophy
The BHK Signature Preamplifier features two 12AU7 dual triode vacuum tubes in the input stage that act as a zero feedback balanced input amplification pair. A combination of an input stepped attenuator, built around the highest quality passive components for coarse volume adjustments, coupled with controlling the actual gain of the vacuum tube for finer steps, delivers the most sonically transparent level control. The output stage is a high-bias class A MOSFET design that is unaffected by cable and power amplifier interface challenges.
Application
Preamplifiers play a critical role in any separates audio system, strategically positioned between sources of music—CD players, phono preamps, DACs, tape recorders and tuners—and your power amplifier. The BHK Signature Preamplifier features 5 identical balanced and single ended inputs, and converts all input signals into a balanced signal for the lowest possible distortion. It can be used in a two-channel audio system or as part of a home theater system. The high-bias Class A MOSFET output stage ensures unmatched performance with any cable and amplifier interface.
Technical Specifications
| Specification | Value |
| Physical | |
| Unit Weight | 9.97 kg (22 lbs) |
| Unit Dimensions (W×D×H) | 43 × 36 × 10 cm (17" × 14" × 4") |
| Shipping Weight | 14 kg (31 lbs) |
| Shipping Dimensions | 61 × 52 × 25 cm (24" × 20.5" × 10") |
| Power Requirements | |
| Input Power | Model specific 100VAC, 120VAC, or 230VAC 50/60Hz |
| Power Consumption | 60W |
| Audio Inputs | |
| Coaxial RCA (Single Ended) | 5 |
| XLR (Balanced) | 5 |
| Input Impedance (Unbalanced) | 33kΩ minimum |
| Input Impedance (Balanced) | 66kΩ minimum |
| Sensitivity | Unbalanced: 1.3V/33kΩ Balanced: 1.3V/66kΩ |
| Audio Outputs | |
| Coaxial RCA (Single Ended) | 2 |
| XLR (Balanced) | 2 |
| Output Level | 4.0 Vrms |
| Output Impedance | <100Ω |
| Frequency Response (20-20kHz) | +/- 0.1dB |
| THD & IM @ 1kHz (Full Scale) | <0.03% |
| Bandwidth | -3dB 0.1Hz - 200kHz |
| DC Triggers | |
| +12V Triggers | 2 |
| Headphone Performance | |
| Output Power (300Ω) | >200mW |
| Output Power (16Ω) | >4.0 Watts |
| S/N Ratio | >90dB (1kHz) |
| THD & IM (1 volt out) | <0.02% |
| Output Impedance | <0.5Ω |
Key Features
- Dual 12AU7 vacuum tube input stage with zero feedback
- High-quality stepped attenuator volume control
- High-bias Class A MOSFET output stage
- 5 balanced (XLR) and 5 unbalanced (RCA) inputs
- Converts all inputs to balanced signal processing
- Powerful headphone amplifier (up to 4W into 16Ω)
- 2 DC trigger outputs for system integration
- Home theater bypass capability
- Premium build quality with audiophile-grade components
Caring for your Speakers and Amplifiers
To Keep your equipment safe these are some best practices to note. Please be advised that this is only to reduce the risk of misuse and is not an exhaustive list.
Speakers
- Speaker terminals are marked red and black, ensure your amplifier to the speakers are wired on the same colours
- Ensure no loose speaker wire from the red touches a loose wire from the black as this will lead to a short circuit and damage either the speaker, the amplifier or both.
- Not all speakers are designed to play at max volume, kindly consider the pairing of your amplifier and speakers
- Speaker cabinets cannot be replaced please handle with care.
AV & Stereo Amplifiers
- If your amplifier has HDMI ports, ensure all devices are off before plugging in the HDMI cable
- Turn off the amplifier before swoping out or adding speaker cable
- Amplifiers generate heat, place them in a well ventilated space. if possible avoid having anything on top of the unit.
- adding a surge protector can assist with power dips which are likely to damage your devices. Isotek and Furman are industry standard.
- Dusty environments can sometimes lead to accumulation of dust in the electronic components that might affect heat regulation
Shipping & Returns
- Free shipping on orders over R500 within the country.
- Standard delivery within 2–5 business days. Delays will be communicated. This might vary slightly depending on your location.
- Return items in original condition for a full refund. (unopened state)
- Returns that are open/unboxed will be subject to a handling fee. Refunds will only be processed after testing the unit.