PS Audio BHK Signature 250
Power Amplifier
Midland HiFi Studio - Key Information
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Overview & Features
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.
The BHK Signature 250 Stereo Power Amplifier culminates one man’s lifelong quest for perfection in power amplification. Bascom H. King’s magnum opus combines a vacuum tube input with a powerful MOSFET output capable of 250/500 watts per channel. The BHK Signature 250 Stereo amplifier can drive any loudspeaker to musical perfection and is the most important element in your music reproduction chain.
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
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 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
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)
Output Power (Both channels driven 120vac mains, 1kHz, 1% THD)
8Ω: 250W minimum
4Ω: 500W minimum
2Ω: Stable for musical transients
Damping factor: >150