PS Audio BHK Signature 300 series system monoblocks

PS Audio BHK Signature 300 Mono Amplifiers, black chasis. Tube and solid state hybrid that that provides the best of both amplification topologies.

Original owner, purchased new 2018. Manufacturers packaging. Smoke and pet free home. $6,995.00, $200 FedEx ground shipping within continental US only. 

A rare handful of power amplifiers withstand the test of time, the BHK Signature 300 monoblocks are one such amplifier. Hand built, uncompromising.

The BHK Signature 300 Monoblocks are power amplifiers that culminate 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

Specifications:

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

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)

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