Features:
- Circuitry designed by legendary John Curl
- Ultra-high bias Class A/AB operation
- 25 watts of pure Class A power
- Stable with speaker impedance dips below 1Ω
- Bybee Music Rails™ - active high frequency filters for input stage
- New John Curl driver stage employs a cascode circuit for greater open loop bandwidth & superior linearity
- Gain switch to select 29 dB or 23 dB gain for optimum compatibility with high gain preamps or extremely efficient speakers
- R-core transformer for input stage suppresses noise on power line
- 6 massive 33,000 uF Nichicon Gold Tune filter capacitors for output stage
- 22,400 uF input stage power supply filter capacitors, independent of the main power supply
- Dual CHK Infinium, custom 5-way speaker binding posts for easy bi-wiring
- Neutrik locking XLR balanced input & loop output jacks
- Vampire 24k gold-plated RCA input & loop output jacks
- Direct-coupled signal path, no capacitors or inductors in the audio path
- JFET input stage, MOSFET driver stage
- 24 beta-matched 15 ampere, 230V, 60 MHz bipolar output transistors
- 2.1 kVA shielded toroid power transformer with premium H18 grade core
- Independent power supplies for input stage, driver stage & output stage
- Full power is rated all the way down to 2Hz for unrestricted low-end bass
- Harris hyper-fast soft-recovery bridge diode rectifiers
- REL & Nichicon Muse capacitors
- DC servo & relay protection circuits
- AC turn-on inrush surge protection with relay bypass
- Automatic turn-on by 12 V trigger or audio sensing
- 4 rack space chassis with rear carry handles
- Rack mount hardware is included
- Available in silver or black
Specifications:
| Power Output | 450 x1 watts @ 8 Ω 850 x1 watts @ 4 Ω 1300 x1 watts @ 2 Ω |
| Power measurements are with 120 VAC: | 0.15% THD, RMS continuous power, full audio band (20 Hz - 20 kHz) |
| Class A Power Output | 25 Watts, bias switch set to high 10 Watts, bias switch set to low |
| Current Capacity | 180 amps, peak |
| Slew Rate | > 130 volts per microsecond |
| Frequency Response | 2 Hz - 120 kHz, +0/-2 dB 20 Hz - 20 kHz, +0/-0.25 dB |
| Total Harmonic Distortion (THD) | < 0.15 % at full power < 0.02 % at typical listening levels |
| IM Distortion | < 0.03 % |
| TIM | Unmeasurable |
| Damping Factor | > 1200 at 20 Hz |
| Input Impedance | Unbalanced: 50 kΩ Balanced: 100 kΩ, (50 kΩ per leg) |
| S/N Ratio, inputs shorted | >122 dB, IHF A-weighted, bias set to Low >120 dB, IHF A-weighted, bias set to High >113 dB, Unweighted, bias set to Low >111 dB, Unweighted, bias set to High |
| Total Gain | 29 dB (Gain switch set to normal) 23 dB (Gain switch set to low) |
|
Input Sensitivity for 28.28 V Output into 8 Ω |
Unbalanced: 1 V Balanced: 1 V per leg (Gain switch set to normal) |
| DC Trigger Requirements | +9 Vdc to +12 Vdc, 5 mA |
| Audio Trigger Requirement | 2.5 mV - 10 mV |
| XLR Pin Identification | 1 = Ground (Shield) 2 = Positive 3 = Negative (Return) |
| Dimensions | Height without feet: 7-1/8" (181 mm) Height with feet: 7-3/4" (197 mm) Depth: 20" (508 mm) Depth with cables: 21-1/2" (546 mm) |
| Shipping Carton Dimensions | Width: 29-1/2" (750 mm) Depth: 27-1/2" (700 mm) Height: 15-3/4" (400 mm) |
| Net Weight | 83 lb. (37.6 kg) |
| Shipping Weight | 107 lb. (48.5 kg) |
| Power Requirement | Standby: <1 Watt Idle (bias set to low): 145 Watts Idle (bias set to high): 275 Watts Typical Listening levels: 400 Watts Maximum: 1500 Watts |