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PS Audio BHK 300 Signature Mono Power Amplifier (Pair)


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Enquiry/price check? Click here SKU: PSAUDBHK300
Ex VAT: £10,999.17

RRP: £16,499.00


This power amplifier designed by Bascom H King features a hybrid zero-loss input stage coupled with MOSFET output for a refined and polished musical performance.

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Condition: Brand new in original retail packaging

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RRP: £16,499.00


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Warranty length 3 Years
Brand PS Audio

Tech Specs

- Speaker Outputs Signature 250: Gold plated copper binding posts (2 pair per channel)
- Speaker Outputs Signature 300: Gold plated copper binding posts (2 pair)
- Other: DC Trigger Input, 3.5mm 5-15VDC
- Power Consumption:
- @Ready 75 Watts
- @Idle 175 Watts
- @Rated power 8Ω 850 Watts
- @Rated power 4Ω 1600 Watts
- Signal
- Gain: 30.5dB +/-0.5dB
- Sensitivity for rated output power of 250 watts into 8Ω: 1.3V
- Noise: 100-20KHz <-85dBV
- Input impedance Signature 250: stereo Unbalanced 100KΩ, Balanced 200KΩ
- Input impedance Signature 300: mono Unbalanced 50KΩ, Balanced 100KΩ
- Output Impedance: 50Hz, 2.8VRMS <0.1Ω
- frequency Response: @2.8VRMS
- 10Hz – 20KHz +/- 0.1dB
- 10Hz – 200KHz +0.1/-3.0dB
- 1KHz, 1W/8Ω <0.01%
- 20-20KHz, 1W/8Ω <0.1%
- 1KHz, 200W/8Ω < 0.1% (120VAC Mains input)
- 1KHz, 400W/4Ω < 0.1% (120VAC Mains input)
- Signature 250 Stereo Amplifier
- Output Power: Both channels driven 120vac mains, 1kHz, 1% THD
- 8Ω: 250W minimum
- 4Ω: 500W minimum
- 2Ω: Stable for musical transients
- Damping factor: >150
- Signature 300 Mono Amplifier
- Output Power: 120vac mains, 1kHz, 1% THD
- 8Ω: 300W minimum
- 4Ω: 600W minimum
- 2Ω: 1000W
- Damping factor: >350 
- Unit Weight: 83 lbs
- Unit Dimensions: 17.1” x 8.7” x 14” Chassis only. 15" deep including connectors.
- Shipping Weight: 92 lbs
- Shipping Dimensions: 21”x 13” x 19”

Product Description

PS Audio BHK 300 signature mono power amplifier is built in the finest quality, refined and polished to meet gold standards of power amplification. It features a low-loss vacuum tube input stage coupled to balanced MOSFET output.

Musical Perfection

The BHK Signature 300 Mono power amplifiers can drive any loudspeaker with ease. It delivers 300 watts in 8 Ohms, 600 into 4 Ohms and more than 1,000 watts into 2 Ohms for massive power and performance. Designed and refined to perfection means the Signature 300 performs to unsurpassed standards, ensuring stunning musicality without compromise. 

Zero-Loss Input

Critical to the performance is an input stage that preserves all the musical details. When connecting the pre-amp and power amp, a lot of details can be easily lost. The vacuum tubes used in the BHK feature far greater quantities of electrons which ensures subtle and powerful musical information are passed without loss. The vacuum tube and MOSFET design with low feedback and wide bandwidth assure your loudspeaker reveals the tiniest details in music, clearer than ever.


The hybrid design of the BHK Signature ensures the best technologies are combined from both MOSFET's and vacuum tubes, which is highly beneficial. The MOSFET section can handle power without the need for additional circuitry like tube power amps require. They also sound a lot better. N-Type MOSFET's used in the amplifier produce almost perfectly balance waveform and much lower distortion than P-types.

Built By Bascom

Industry legend Bascom H.King took the lead in the design of the BHK Signature 300. Re-imagining the amplifier as a hybrid tube design led to the creation of this amplifier with vacuum tube input and MOSFET output stage. The output is regulated to preserve musical details and ensure low noise. A pure, clean  path is achieved by implementing high quality hand selected passive components. Even the connectors are crafted using copper gold plated for a quality connection. The BHK Signature 300 truly showcases the passion and craft of one man.

Key Features

- Zero-loss parallel vacuum tube input stage
- Fully paralleled inside (not like a traditional bridged approach)
- Differentially coupled, paralleled, balanced MOSFET output stage
- All through hole construction (no surface mount parts)
- RCA Single ended input
- XLR balanced input
- 300 watts 8Ω
- 600 watts 4Ω
- 1000 watts 2Ω
- Less than 0.1% thd 20Hz to 20kHz at rated power
- Damping factor 100 for excellent loudspeaker control
- Front panel standby button for vacuum tube input
- 3dB greater than 200kHz
- Dual, custom, solid copper, gold plated output binding posts
- Fully balanced from input to output
- Input 12 volt trigger
- Easy access for tubes

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0121 224 7350/7351

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