PS Audio BHK Mono 300 Power Amplifier Pair

PS Audio BHK Mono 300 Power Amplifier

The gold standard of power amplification

The audio performance and build quality of the Signature 300 series has been refined, honed, and polished over the past half century of design work by industry legend, Bascom H. King. If there is a better performing power amplifier anywhere in the world, we are unaware of it. The BHK Signature 300 Monoblock designs are 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, the BHK Signature 300 series is a perfect fit. 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.

• 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

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
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
Signature 300 Mono Amplifier
Output Power: 120vac mains, 1kHz, 1% THD
8Ω: 300W minimum
4Ω: 600W minimum
2Ω: 1000W
Damping factor: >350

UK Delivery

• FREE delivery via DPD Local By 12pm on orders to value over £300, including one hour delivery window service 'Predict & Follow My Parcel'.
• Royal Mail Special Delivery By 1pm costs between £5.00 - £10.00 on orders to value under £300, dependent on weight.
• Saturday or Sunday delivery available upon request for supplemental charge.

EU Delivery

• £25 delivery charge 'Flat Fee' via DHL Europe by Road service (5-7 days) which provides comprehensive tracking of shipments online.
• £50 delivery charge 'Flat Fee' via DHL Europe by Air service  (2-3 days) which provides comprehensive tracking of shipments online.
  Receiver is responsible for the payment of local Duties and Taxes.

USA & Canada Delivery

• Services based on your order being shipped to the U.S. and Canada are calculated as follows:
  £100 delivery charge 'Flat Fee' via DHL international 'Day Definite' service per parcel.
  Receiver is responsible for the payment of local Duties and Taxes.

Exceptions

• Not all products are available for order into Europe, USA & Canada

WARRANTY

• Full manufacturer's warranty on all new purchases. Standard warranty is typically 12 months to 2 years with some goods coming with 6 years manufacturer's warranty.
• Goods purchased in UK and EU are covered by the Consumer Contracts Regulations.