PS AudioBHK Stereo amplifierPS Audio BHK Stereo amplifier 250wpc hybrid hi bias power amp-KIller trades offeredAsk us about 6 MONTHS NO PAYMENTS OR INTEREST thru PayPal.Ask us about our great trade-in offer on this and all PS products. Call to discuss. Let us purchase your qualified trade-in for what you...7499.00

PS Audio BHK Stereo amplifier 250wpc hybrid hi bias power amp-KIller trades offered [Expired]

no longer for sale

Ask us about 6 MONTHS NO PAYMENTS OR INTEREST thru PayPal.

Ask us about our great trade-in offer on this and all PS products. Call to discuss.

  • Let us purchase your qualified trade-in for what you originally paid, up to $3000.00

The PS BHK Signature stereo amp is a high current 250 watts per channel hybrid amplifier designed to be the best under $15k amp available. The first review is out and it is a rave.

They say:
"I loved so much, I ended up buying the review sample… the PS Audio BHK Signature 250 Stereo Power Amplifier."
"So what does all this mean sonically or musically? Well, simply put the BHK 250 rocks and does so with a nimble presence that puts the music in the room with you. Neither forward nor recessed, the presentation is, for me, spot on. Fast and coherent, extended and dynamic"
"I can't recommend the BHK 250 enough. Like I said I bought this one and it is now here between the speakers"

Read the entire review at:

The BHK stereo amp is a 250 watts per channel stereo amp with a zero loss vacuum tube input stage and a high bias differentially balanced MOSFET hi current output stage. It produces 250 watts/per channel into an eight-Ohm loudspeaker, 500 watts/channel into four-Ohms, and is stable into 2-Ohms. Sonics are superb and it is our favorite under $15k hybrid amplifier and pure out favorite for many speakers. Sonics are exceptional and compete with amps selling for multiples of its price.

The amp was designed by Bascom King who also was one of the designers of the Constellation amplifiers. It is run hi bias as Class A at lower power outputs. By using only N Channel MOSFETS in its output stage, the BHK Signature produces a near-perfect balanced waveform without the degradation inherent in a complimentary design.

We also have the 300 watt mono versions in stock.


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 or Silver

Voltage Options: Factory set only

Mains Power Inputs: IEC C14

Accessories Included:

US (NEMA 5-15P) (all versions)

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)


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


Gain:30.5dB +/-0.5dB

Sensitivity for rated output power of 250 watts into 8Ω:1.3V

Noise: 00-20KHz <-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 @2.8VRMS

Frequency Response:  10Hz – 20KHz +/- 0.1dB / 10Hz – 200KHz +0.1/-3.0dB


1KHz, 1W/8:<0.01% 20-20KHz, 1W/8:<0.1%

1KHz, 200W/8Ω: < 0.1% (120VAC Mains input)

1KHz, 400W/4Ω: < 0.1% (120VAC Mains input)

250 Stereo Amp Power

Both channels driven 120vac mains, 1kHz, 1% THD
8Ω: 250W minimum

4Ω: 500W minimum

2Ω: Stable for musical transients

We accept PayPal, Visa, Discover and MasterCard as well as money orders.
Read our AudiogoN #1 rated feedback & call me at 770-667-5633 with questions or to order.
GA & HI residents add sales tax

Brands carried:
Acoustic Zen, April Music, Audio Space tube electronics, Audeze headphones, Auralic Music Streamers & DAC's, Bob Carver tube amplifiers and loudspeakers, Burson Audio, Cambridge, Creek, DSPeaker room correction, Emerald Physics loudspeakers, amplifiers & DSP crossovers, Epos, Exogal DAC's & amplifiers, Focal headphones,  Gallo speakers, Graham Slee, HifiMan headphones, Jolida, LSA speakers, Lehmann phono stages, Marantz Reference, Micromega, Music Hall, Mu-So by Naim, Ortofon cartridges, Peachtree Audio, Project, PS Audio, Quad, Scansonic loudspeakers, Silverline Audio speakers, SOTA Turntables, Spread Spectrum Technologies Ampzilla, Sumiko subwoofers & cartridges, TriangleArt turntables, Wireworld, Wyred 4 Sound, Wywires

Sales policies on the Underwood Hifi Inc website at

Seller Information

Underwood Hifi, Inc.  Verified Dealer

Last 12 months

Member since July 2000