BHK Signature 300 Mono
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PS Audio BHK 300 sig mono

Power Amplifier

Midland HiFi Studio - Key Information



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Overview & Features


Only a rare handful of power amplifiers withstand the test of time. The BHK Signature 300 is one such amplifier. Hand built, uncompromising.


The BHK Signature 300 Mono power amplifier culminates one man’s lifelong quest for perfection in power amplification. Bascom H. King’s magnum opus combines a pair of vacuum tubes on its input with a double set of parallel MOSFET outputs capable of 300 watts in 8Ω, 600 into 4Ω and more than 1,000 watts into 2Ω.  The BHK Signature 300 amplifier can drive any loudspeaker to musical perfection and is the most important element in your music reproduction chain.


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
  • 83 pounds
  • Input 12 volt trigger
  • Easy access for tubes

Technical Specification

Unit Weight

  • 83 lbs [37.6 kg]


Unit Dimensions

  • 17.1” x 8.7” x 14” Chassis only. 15" deep including connectors.


Shipping Weight

  • 92 lbs [41.7 kg]


Shipping Dimensions

  • 21”x 13” x 19”


Color Options

  • Black
  • Silver


Mains Power Inputs

  • IEC C14


Fuse Compliment all Countries

  • 4 - 10 amp fast blow H-Rated 5x20mm Rail Fuses


230vac Countries

  • 1 - 1 amp slow blow H-rated 5x20mm
  • 1 - 5 amp slow blow H-rated 5x20mm


Accessories Included

  • UK (BS 1363) (230V version)


Audio Inputs

  • RCA (Unbalanced)
  • XLR (Balanced)


Speaker Outputs

  • 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

  • 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


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)


Output Power (Both channels driven 120vac mains, 1kHz, 1% THD)

  • 8Ω:  300W minimum
  • 4Ω:  600W minimum
  • 2Ω:  1000W
  • Damping factor:  >350