PS Audio
The BHK Signature 250 stereo power amplifier bears no witness to compromise. No construction details were overlooked, no performance weakness tolerated. This stereo power amplifier is the industry reference standard for performance—an investment grade musical instrument that brings music to life. The BHK Signature 250 stereo is 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 in a single-chassis format, the BHK Signature 250 is a perfect fit.
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.
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 |
@Ready | 75 Watts |
@Idle | 175 Watts |
@Rated power 8Ω | 850 Watts |
@Rated power 4Ω | 1600 Watts |
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 |
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) |
Both channels driven 120vac mains, 1kHz, 1% THD | |
8Ω | 250W minimum |
4Ω | 500W minimum |
2Ω | Stable for musical transients |
Damping factor | >150 |