The Holton One-Zero-Two sub-woofer plate power amplifier features 2 x 130 watts MOSFET power amplifiers, with onboard 24dB/Octave active filters, integrated high power solid state relays and dip-switch selectable crossover frequencies, ranging from 80hz to 300hz. 
The Sub-woofer plate amplifier is controlled and protected by an onboard embedded MCU, which detects possible DC Offset  errors, over temperature, and AC mains present detection.
The allows precise control and timing of the power up sequence, with absolutely no turn on/off thumb, to the subwoofer drivers.

Sub-Woofer Plate Amplifier Specifications

8 Ohms: 2 x 130W

4 Ohms: 2 x 160W 

Frequency Response: 20Hz-20Khz, -0.1db, 3Hz-210KHz, -3dB Input filter limited.

THD: 0.002%, 1khz, @100W into 8 ohms 

IMD: 0.002%, @100W RMS into 8 ohms

SNR: -110dB, Unweighted, referenced to full output; -114.6dB A-Weighted

Damping Factor: 800 into 8 ohms, 100Hz

Gain: 25.84 (28.24dB)

Input Impedance: 22k Ohms Unbalanced: 

Inputs: High Level Binding Post signal input.