PS Audio - BHK Signature 300 (BHK-M300) - Monoblock Power Amplifiers - PAIR

The PS Audio BHK Signature 300 is a reference-grade monoblock power amplifier designed by renowned amplifier engineer Bascom H. King. Combining the musical refinement of a Class A vacuum tube input stage with the tremendous power and control of a high-bias MOSFET output stage, the BHK Signature 300 delivers exceptional transparency, dynamic authority, and effortless musical reproduction.

This matching pair provides 300 watts per channel into 8 ohms and 600 watts per channel into 4 ohms, delivering the power and control necessary to drive demanding loudspeakers with remarkable precision. Each amplifier features a fully balanced differential architecture, dual 6922 vacuum tube input stage, and N-channel MOSFET output section. The dedicated monoblock configuration provides independent amplification for each channel, helping maintain excellent stereo separation, dynamic range, and soundstage presentation.

Finished in classic black, both amplifiers are in mint pre-owned condition, presenting exceptionally well with virtually no signs of previous use. This pair offers an outstanding opportunity to own PS Audio's acclaimed BHK Signature 300 monoblock amplifiers for a serious high-end stereo system.

FEATURES:

• Matching pair of PS Audio BHK Signature 300 monoblock power amplifiers
• Reference-grade hybrid amplifier design by Bascom H. King
• Dedicated monoblock configuration for independent left and right channel amplification
• Class A vacuum tube input stage for natural, detailed musical reproduction
• High-bias, differentially balanced N-channel MOSFET output stage
• Fully balanced differential circuit architecture
• Dual self-biasing vacuum tube input design in each amplifier
• High-current output capability for demanding loudspeaker loads
• Custom solid-copper, gold-plated speaker binding posts supporting bi-wiring
• Balanced XLR and single-ended RCA input connectivity
• 12V trigger input for convenient system integration
• Heavy-duty chassis construction with premium internal components

POWER & PERFORMANCE SPECIFICATIONS:

• Brand: PS Audio
• Model: BHK Signature 300 (BHK-M300)
• Type: Hybrid Monoblock Power Amplifiers
• Quantity: 2 Amplifiers (Pair)
• Channels: 2 Total (1 Per Amplifier)
• Power Output (8 Ohms): 300 Watts Per Channel
• Power Output (4 Ohms): 600 Watts Per Channel
• Transient Power Capability (2 Ohms): Up to 1,000 Watts Per Amplifier
• Frequency Response: 10Hz - 20kHz (+/- 0.1dB)
• Extended Frequency Response: 10Hz - 200kHz (+0.1/-3.0dB)
• Total Harmonic Distortion: Less Than 0.1% (20Hz - 20kHz at Rated Power into 8 Ohms)
• THD at 1kHz: Less Than 0.01% (1 Watt into 8 Ohms)
• Voltage Gain: 30.5dB (+/- 0.5dB)
• Input Sensitivity: Approximately 1.2 - 1.3V for Rated Output

CIRCUIT & CONNECTION SPECIFICATIONS:

• Input Stage: Class A Vacuum Tube
• Tube Complement: 2 x 6922 / 6DJ8 Dual-Triode Vacuum Tubes Per Amplifier (4 Total)
• Output Stage: Differential N-Channel MOSFET
• Balanced Input: 1 x XLR Per Amplifier
• Single-Ended Input: 1 x RCA Per Amplifier
• Balanced Input Impedance: 200k Ohms
• Unbalanced Input Impedance: 100k Ohms
• Speaker Connections: 2 Pairs of Gold-Plated Binding Posts Per Amplifier
• Trigger Input: 1 x 12V (3.5mm) Per Amplifier

PHYSICAL & ELECTRICAL SPECIFICATIONS:

• Dimensions (W x H x D): 17.1 x 8.7 x 14 Inches Per Amplifier
• Weight: 83 lbs. (37.6kg) Per Amplifier
• Combined Net Weight: 166 lbs. (75.2kg)
• Power Connection: IEC AC Power Inlet
• Standby Power Consumption: 75 Watts Per Amplifier
• Idle Power Consumption: 175 Watts Per Amplifier
• Power Consumption at Rated Output (8 Ohms): 850 Watts Per Amplifier
• Power Consumption at Rated Output (4 Ohms): 1,600 Watts Per Amplifier
• Finish: Black

CONDITION:

Both amplifiers are in mint pre-owned condition with virtually no visible signs of previous use. The black finishes are exceptionally clean, and both units present beautifully. This listing includes two PS Audio BHK Signature 300 monoblock amplifiers, forming a complete stereo pair. Please review all photos carefully for the exact cosmetic condition and everything included.