Yorkville Sound

The powerful AP4020 weighs a comfortable but solid 40 lbs and occupies only two rack spaces. It delivers 1200 Watts per channel (AP4020 @ 2 Ohms). The AP4020 power amplifier also incorporates a soft turn-on circuit which eliminates nuisance breaker-tripping on power-up.

General Features:
Designed for rock solid performance right down to and below their lowest impedance ratings
Will easily drive reactive phase shifted loads
Advanced protection schemes including DC current, load, thermal and breaker protection
User-defeatable peak limiter that is transparent below clipping levels
'Soft turn-on circuit eliminates damage to attached components and prevents nuisance breaker-tripping
Computer-optimized Silentfan front-to-back heat dissipation system
Long-life, faceplate-mounted, user serviceable, air intake filters
Front panel Power, Protect, Activity and Clip LED's
Speakon and binding post outputs
Balanced XLR & 1/4" TRS inputs
Sturdy all-steel construction
Baked-on, black finish
Reinforced mounting ears
User defeatable limiter circuit

Specs:
Amplifier class H
Continuous Average Power @ 2 Ohms BCD (Watts)- 475 per-channel
Continuous Average Power @ 4 Ohms BCD (Watts)- 750 per-channel
Continuous Average Power @ 2 Ohms BCD (Watts)- 1200 per-channel
Continuous Average Power Bridged BCD (Watts) 2400 @ 4 Ohms
Burst Average Power @ 8 Ohms BCD (Watts) - 625 per-channel
Burst Average Power @ 4 Ohms BCD (Watts) - 1200 per-channel
Burst Average Power @ 2 Ohms BCD (Watts) 2175 per-channel
Burst Average Power Bridged at 8 Ohms BCD (Watts) 4350 @ 4 Ohms
Frequency Response (Hz, +/- 1dB) - 20-20,000
Hum and Noise (un / Aweighted, dB) - -103 / -106
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
Input Impedance - Bal/Unbal (Ohms) - 20,000/10,000
Input Sensitivity (Vrms) For Full Power Out - 1.4V
Max Voltage Gain (dB) - 33
CMRR @ 60Hz (min/typ) - 48/56 dB
Stereo / Mono / Bridge (S/M/B) - S/M/B
Non-Defeatable Protection - DC,Load,Thermal
Defeatable Protection - Limiter Peak
Selectable High Pass Filter - 40Hz @ 12dB Octave
Cooling- Internal Fan, thermally regulated
Cooling Path - Front to Rear
Fan Filter - User Serviceable & Washable
Inputs - XLR x 2, 1/4" TRS x 2 in total
Outputs - Speakon 4-pin x 2 & Binding Post Set x 2
Power Consumption (typ/max) - 1130/1800 Watts
Rack Spaces - 2
Transformer Type - Toroidal
Exterior Finish - Baked Charged Powder Paint, black
Dimensions (DWH/D from ears, in.)- 19 x 17.3 x 3.5/16.2
Dimensions (DWH/D from ears, cm) - 48.3 x 43.9 x 8.9/41
Weight (lbs/kg) - 41 / 18.6