The PS Audio 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.
PS Audio BHK Signature 250 Key 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
DESIGN
Nothing in the design of a power amplifier is more important than its input stage when preserving music’s finest nuances. In the BHK Signature, a vacuum tube serves as the perfect interface between the preamplifier and MOSFET output stage. This hybrid approach offers stunning musical performance and unrivalled, effortless drive to the speaker. The Signature 250 Stereo Amplifier is the ultimate choice when a single chassis solution is required.
APPLICATION
The BHK Signature 250 Stereo Amplifier produces 250 watts/ 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. Use this amplifier as the bedrock of your high-performance audio or home theatre system. The BHK 250 provides the finest performance, reliability and build quality possible, in a single chassis format.
Specifications:
BHK Signature 250 Stereo |
|
| 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” |
| Colour 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 | 1.2V |
| 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 |
|
| 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 |
