An impedance mode switch on the back panel of the amplifier allows the user to select full output power into either a two or four ohm load for maximum application flexibility. This means this compact two rack space amplifier can deliver up to 3600 watts of clean, pure power into either 4 or 8 ohm loads (bridged), making it a perfect solution for virtually any touring live sound, club system or installation.
The internal signal path has been optimized and a toroidal transformer is used in the AP4K design - both serving to reduce hum and noise in practical real-world applications. It's three-tier Class-H design approaches efficiency normally associated with Class-D technology; yet provides the superior transient response and low distortion of the best analog designs.
| Amplifier class | Class-H |
| Continuous Average Power @ 8 Ohms BCD (Watts) | 600 (x2)(2ohm mode)/1000 (x2)(4ohm mode) |
| Continuous Average Power @ 4 Ohms BCD (Watts) | 1000 (x2)(2ohm mode)/1800 (x2)(4ohm mode) |
| Continuous Average Power @ 2 Ohms BCD (Watts) | 1800 (x2) (2ohm mode)/ NA in 4ohm mode |
| Continuous Average Power Bridged BCD (Watts) | 3600 @ 4 ohms /3600 @ 8 ohms |
| Burst Average Power @ 8 Ohms BCD(Watts) | 1000 (x2)(2ohm mode)/1800 (x2)(4ohm mode) |
| Burst Average Power @ 4 Ohms BCD (Watts) | 1800 (x2)(2ohm mode)/3500 (x2)(4ohm mode) |
| Burst Average Power @ 2 Ohms BCD (Watts) | 2500 (x2)(2ohm mode)/ NA |
| Burst Average Power Bridged BCD (Watts) | 5000 @ 4 ohms / 7000 @ 8 ohms |
| Frequency Response (Hz, +/- 1dB) | 20-20,000 |
| Hum and Noise (un / Aweighted -dB) | -100/ -115 |
| THD -1kHz- 4 OHMS | 0.01 |
| THD - 20Hz-20kHz, 4 Ohms | less than 0.1% |
| Slew Rate (V/uS) | 25 |
| Slew Rate Bridged (V/uS) | 50 |
| Damping Factor (30 Hz - 400 Hz @ 8 Ohms) | 600 |
| Crosstalk (1kHz / 20Hz-20kHz) | -75 / -60 dB |
| Input Impedance - Bal/Unbal (Ohms) | 10,000/5,000 |
| Input Sensitivity (Vrms) For Full Power Out | 1.0V (2ohm mode) / 1.4V(4ohm mode) |
| Max Voltage Gain (dB) | 36 |
| CMRR @ 60Hz (min/typ) | 48/56 dB |
| Stereo / Bridge (S/B) | S/B |
| Protection | DC, Load, Thermal |
| Limiter | Peak |
| High Pass Filter | 50Hz, 18dB Octave |
| Cooling | Internal Fans |
| Cooling Path | Front to Rear |
| Inputs - XLR | 2 |
| Inputs - 1/4" Jacks | 4 |
| Outputs - Speakon 4-pin | 2 |
| Outputs - Binding Post | 2 |
| Power Consumption (typ/max) | 1130/1800 Watts |
| Rack Spaces | 2 |
| Transformer Type | Toroidal |
| Exterior Finish | Baked, Black Painted |
| Dimensions (DWH /D fm ears, inches) | 16.5 x 17.3 x 3.5 x 14.9 |
| Dimensions (DWH /D fm ears, cm) | 41.5 x 43.9 x 8.9 x 37.85 |
| Weight (lbs / kg) | 41 / 18.5 |
Specifications subject to change without notice
An impedance mode switch on the back panel of the amplifier allows the user to select full output power into either a two or four ohm load for maximum application flexibility. This means this compact two rack space amplifier can deliver up to 3600 watts of clean, pure power into either 4 or 8 ohm loads (bridged), making it a perfect solution for virtually any touring live sound, club system or installation.
The internal signal path has been optimized and a toroidal transformer is used in the AP4K design - both serving to reduce hum and noise in practical real-world applications. It's three-tier Class-H design approaches efficiency normally associated with Class-D technology; yet provides the superior transient response and low distortion of the best analog designs.
| Amplifier class | Class-H |
| Continuous Average Power @ 8 Ohms BCD (Watts) | 600 (x2)(2ohm mode)/1000 (x2)(4ohm mode) |
| Continuous Average Power @ 4 Ohms BCD (Watts) | 1000 (x2)(2ohm mode)/1800 (x2)(4ohm mode) |
| Continuous Average Power @ 2 Ohms BCD (Watts) | 1800 (x2) (2ohm mode)/ NA in 4ohm mode |
| Continuous Average Power Bridged BCD (Watts) | 3600 @ 4 ohms /3600 @ 8 ohms |
| Burst Average Power @ 8 Ohms BCD(Watts) | 1000 (x2)(2ohm mode)/1800 (x2)(4ohm mode) |
| Burst Average Power @ 4 Ohms BCD (Watts) | 1800 (x2)(2ohm mode)/3500 (x2)(4ohm mode) |
| Burst Average Power @ 2 Ohms BCD (Watts) | 2500 (x2)(2ohm mode)/ NA |
| Burst Average Power Bridged BCD (Watts) | 5000 @ 4 ohms / 7000 @ 8 ohms |
| Frequency Response (Hz, +/- 1dB) | 20-20,000 |
| Hum and Noise (un / Aweighted -dB) | -100/ -115 |
| THD -1kHz- 4 OHMS | 0.01 |
| THD - 20Hz-20kHz, 4 Ohms | less than 0.1% |
| Slew Rate (V/uS) | 25 |
| Slew Rate Bridged (V/uS) | 50 |
| Damping Factor (30 Hz - 400 Hz @ 8 Ohms) | 600 |
| Crosstalk (1kHz / 20Hz-20kHz) | -75 / -60 dB |
| Input Impedance - Bal/Unbal (Ohms) | 10,000/5,000 |
| Input Sensitivity (Vrms) For Full Power Out | 1.0V (2ohm mode) / 1.4V(4ohm mode) |
| Max Voltage Gain (dB) | 36 |
| CMRR @ 60Hz (min/typ) | 48/56 dB |
| Stereo / Bridge (S/B) | S/B |
| Protection | DC, Load, Thermal |
| Limiter | Peak |
| High Pass Filter | 50Hz, 18dB Octave |
| Cooling | Internal Fans |
| Cooling Path | Front to Rear |
| Inputs - XLR | 2 |
| Inputs - 1/4" Jacks | 4 |
| Outputs - Speakon 4-pin | 2 |
| Outputs - Binding Post | 2 |
| Power Consumption (typ/max) | 1130/1800 Watts |
| Rack Spaces | 2 |
| Transformer Type | Toroidal |
| Exterior Finish | Baked, Black Painted |
| Dimensions (DWH /D fm ears, inches) | 16.5 x 17.3 x 3.5 x 14.9 |
| Dimensions (DWH /D fm ears, cm) | 41.5 x 43.9 x 8.9 x 37.85 |
| Weight (lbs / kg) | 41 / 18.5 |
Specifications subject to change without notice