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PS Audio BHK Signature 250 Hybrid Amplifier

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When cost-no-object performance is the goal there are a rare handful of power amplifiers capable of transporting listeners into a musical space few are able to enjoy. The BHK Signature 250 is one such amplifier. Lush, gorgeous, powerful, revealing, hand... Read More
Amplifiers -

When cost-no-object performance is the goal there are a rare handful of power amplifiers capable of transporting listeners into a musical space few are able to enjoy. The BHK Signature 250 is one such amplifier. Lush, gorgeous, powerful, revealing, hand built, perfect.

This stereo power amplifier is the industry reference standard for performance—an investment grade musical instrument that brings music to life. The BHK Signature 250 stereo is built upon two proven topologies: a zero-loss vacuum tube input stage coupled to a high bias differentially balanced MOSFET output. If you are uncomfortable with compromise and seek the finest performance, reliability, and build quality in a single-chassis format, the BHK Signature 250 is a perfect fit.

Features:

  • Zero-loss vacuum tube input stage
  • Differentially coupled balanced MOSFET output stage
  • All through hole construction (no surface mount parts)
  • RCA Single ended input
  • XLR balanced input
  • 250 watts per channel 8Ω Signature
  • 500 watts per channel 4Ω Signature
  • 2Ω stable Signature 250 stereo
  • 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
  • 83 pounds
  • Input 12 volt trigger
  • Easy access for tubes

Available in Silver or Black.

Specifications:

  • Unit Weight:  83 lbs [37.6 kg] / Shipping Weight:  92 lbs [41.7 kg]
  • Unit Dimensions:  17.1” x 8.7” x 14” Chassis only. 15" deep including connectors.
  • 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 - 2 amp slow blow H-rated 5x20mm,  1 - 10 amp slow blow H-rated 5x20mm,   230vac Countries -   1 - 1.6 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)
  • 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
  • Output Impedance:  50Hz, 2.8VRMS <0.1Ω
  • Frequency Response
    @2.8VRMS
    10Hz – 20KHz +/- 0.1dB
    10Hz – 200KHz +0.1/-3.0dB

THD&IM:

  • 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
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