Specifications

The EA-AMP-SUB-1D-500R is a 500W Class D digital subwoofer amplifier designed for the custom installation channel. It is manufactured by Episode, a brand under Snap One (formerly SnapAV, now ADI Global Distribution). The amplifier is 1U rack-mountable and built around a D2Audio D2-81431 Class D controller SoC with a full DSP pipeline.

Electrical Specifications

Parameter	Value
Power (8 ohm)	250W RMS
Power (4 ohm)	500W RMS (< 0.5% THD)
Input Sensitivity	100 mV for 500W @ 4 ohm
Input Impedance	15,000 ohm
S/N Ratio	88 dB (5 kHz BW, ref 500W @ 4 ohm)
Frequency Response	-1.5 dB @ 20 Hz, -1.1 dB @ 300 Hz (Flat EQ, LFE crossover)
Distortion	< 0.2%
Auto-On Sensitivity	< 5.5 mV (L), < 22 mV (R)
12V Trigger	12V +/- 1.2V no load, threshold 2.6V
Current Limit	2.7 ohm (4 ohm min nominal load)

Mechanical Specifications

Parameter	Value
Dimensions	16.9” W x 1.75” H x 8.9” D (19” with rack mounts)
Weight	8.5 lbs
Certification	TUV (UL/EN60065)
Warranty	2-Year Limited

Two Generations

There are two versions of this amplifier that share the same power rating but differ substantially in design and weight.

The original EA-AMP-SUB-1D-500 weighs 19.7 lbs and uses analog controls on the rear panel: a boundary EQ toggle switch, a 0/180 degree phase switch, and a continuously variable crossover dial. It shipped with an IR remote. There is no front panel display, no USB port, and no update switch.

The revised EA-AMP-SUB-1D-500R weighs 8.5 lbs, a dramatic reduction that reflects the move to a more integrated Class D platform. It replaces all rear-panel analog controls with a front panel VFD display and rotary encoder menu system, adding a digital crossover (40-250 Hz), 8-step phase adjustment (0-315 degrees in 45-degree increments), multiple speaker EQ presets, night mode, and sound modes. The 500R also adds a mini USB port and an UPDATE/OPERATE switch. The 2024 manual revision expanded the speaker EQ preset library from 4 profiles to 16.