PS AUDIO BHK Signature Preamplifier - Black
Preamplifiers are at the heart of any high-performance music system. They are the critical controlling interface between our sources of music and our loudspeaker chain. Most preamplifiers do a fine job of control and isolation, but only a rare handful make magic happen.
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, turned out to be the most sonically transparent level control we have yet heard. Finally, the output stage is a high-bias class A MOSFET design that is unaffected by cable and power amplifier interface challenges.
Specifications
Physical | |
| Unit Weight | 22 lbs [9.97 kg] |
| Unit Dimensions | 17” x 14” x 4” [ 36cm x 43cm x 10cm] |
| Shipping Weight | 31 lbs [14 kg] |
| Shipping Dimensions | 20.5”x 24” x 10” [52cm x 61cm x 25cm] |
Power requirements | |
| Input Power | Model specific 100VAC, 120VAC, or 230VAC 50 or 60Hz |
| Power Consumption | 60W |
Audio inputs | |
| Coaxial RCA single ended XLR Balanced | 5 5 |
| Input Impedance Unbalanced (RCA) Balanced (XLR) | 33KΩ minimum 66KΩ minimum |
| Sensitivity | Unbalanced 1.3V/33KΩ Balanced 1.3V/66KΩ |
Audio Outputs | |
| Coaxial RCA single ended XLR Balanced | 2 2 |
Analog Audio Output | |
| 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 | 2 |
Headphone Performance | |
| Output Power 300Ω 16Ω > | >200mW 4.0 Watts |
| S/N Ratio | >90dB (1KHz) |
| THD & IM 1 volt out | <0.02% |
| Output Impedance | <0.5Ω |
Full 3 Year Warranty
