BHK Signature 250 Amplifier

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Description

The BHK Signature 250 and 300 power amplifiers are the culmination of one man’s half-century search for perfection in music’s reproduction. Bascom H. King has designed amplifiers for many companies, some selling in excess of $100,000, including: Constellation Audio, Marantz, Infinity, and Conrad Johnson. This is the first amplifier Bascom felt was good enough to lend his name to. It is his finest achievement in a lifetime of work.

Available in both stereo and mono models, the BHK Signature series is unparalleled in its ability to render details formerly lost in the music. The BHK Signature is a hybrid design enjoying performance benefits from multiple design techniques including, a balanced differential vacuum tube input, balanced differential MOSFET power outputs, and separate, isolated, analog power supplies feeding each.

When it comes to musically controlling and powering loudspeakers, the BHK Signature has no peer. The stereo Signature 250 produces 250 watts/per channel into an eight-Ohm loudspeaker, 500 watts/channel into four-Ohms, and stable into 2-Ohms; enough power to satisfy even the hungriest of loads.

The Mono Signature 300 doubles the output current with half the impedance of the stereo model. Each Mono Signature produces 300 watts into an eight-Ohm loudspeaker, 600 watts into four-Ohms, and 1000 watts into 2-Ohms. But more than just doubling the current, the BHK Signature 300 also doubles every internal component of the 250 into one: double tubes, double power supplies, transistors, capacitors and resistors. The results are hard to put into words. The BHK Signature 300 is a clear step above the stereo 250, on the order of 20% better, though both have the same character of sound. Both the Stereo 250 and Mono 300 are one of the best performing, musical sounding amplifiers ever made. Imagine your delight listening to either.

Additional information

Brand

BHK Signature 250 Stereo and BHK Signature 300 Mono

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
Signature 300 Mono Amplifier

Output Power

120vac mains, 1kHz, 1% THD
8Ω 300W minimum
4Ω 600W minimum
2Ω 1000W

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