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PS Audio BHK 250 Stereo Power Amplifier


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Enquiry/price check? Click here SKU: PSABHK250
Ex VAT: £5,665.83

RRP: £8,499.00


Driving 250 watts into 8 ohms, this power amp features hybrid zero-loss vacuum tube input stage and balanced MOSFET output to preserve the finest musical details.

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Condition: Brand new in original retail packaging

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RRP: £8,499.00


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Warranty length 3 Years
Brand PS Audio

Tech Specs

- 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”
- Color Options: Black, Silver
- Voltage Options: Factory set only Japan 100V, North America 120V, Europe/Asia/Australia/New Zealand 230V
- Mains Power Inputs: IEC C14
- Fuse Compliment all Countries: 4 - 10 amp fast blow H-Rated 5x20mm Rail Fuses
- Fuse Compliment Mains:
- 100vac Countries:
- 1 - 2 amp slow blow H-rated 5x20mm
- 1 - 12 amp slow blow H-rated 5x20mm
- 120vac Countries:
- 1 - 1.6 amp slow blow H-rated 5x20mm
- 1 - 10 amp slow blow H-rated 5x20mm
- 230vac Countries:
- 1 - 1 amp slow blow H-rated 5x20mm
- 1 - 5 amp slow blow H-rated 5x20mm
- Accessories Included: US (NEMA 5-15P) (all versions), Schuko (CEE7/7) (230V version), UK (BS 1363) (230V version)
- Audio Inputs: RCA (Unbalanced), XLR (Balanced)
- 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
- Warranty: 3 years parts and labor on unit, 1 year on vacuum tube
- 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

Product Description

PS Audio BHK 250 stereo power amplifier represents one man's lifetime of work striving to achieve perfection in music reproduction. Bascom H.King's 250 power amp features a hybrid design that enjoys the benefits from the balanced both vacuum tube input and MOSFET outputs.

Drives Any Speakers

PS Audio BHK 250 stereo power amplifier handles any even some of the most demanding loudspeakers. It delivers 250 watts in 8Ohms, 500 into 4 Ohms and more than 1,000 watts into 2 Ohms. The Signature series of amplifiers offer unparalleled performance abilities to revive musical details that were once hidden. 

Zero-Loss Input

BHK Signature power amplifiers are unique in many ways, and their rare ability to faithfully pass even the most delicate of details puts it up there with some of the best. Preserving these tiny details in the music is done through its wide bandwidth, low feedback hybrid design. The BHK's vacuum tubes have massive quantities of free flowing electrons, rare to the amount usually found in transistors, This ensures the input stage passes the most delicate and complex musical details without loss.


Incorporating both vacuum tubes and MOSFET's means the BHK 250 benefits from the best traits from each. The combination means that both disciplines fill in for where the other lacks in performance. The MOSFET section can handle power without the need for additional circuitry like tube power amps require. Additionally, as the input stage does a good job preserving the fine details in music, the textures, timing and phase information and transfers this with no loss to the power stage, the MOSFET does the best job at handling the loudspeakers.

Designed By Bascom

The BHK power amplifiers are the embodiment of industry legend Bascom H.King's lifetime's mission to achieve perfection in musical reproduction. The success of the first hybrid power amplifiers in 1978 eventually led to the creation of the Signature series with the goal to build the top 5 power amps in the world.

High-Quality Components

The MOSFET output is highly regulated for low noise and preservation of musical details. Hand selected passive components and hand soldered parts showcase the high quality of the BHK 250's build.  Even the connectors are crafted using copper gold plated for a quality connection.

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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