For Boox One Storage fairing, Double Boox fairing, Small Boox 6x9 fairing, Choppa fairing: Amplifier is included
For other Fairings: Additional US$120/ set (Original US$225/ set)
(Batwing Small Fairing has no room for amp)

-2 channels
-SMD and 4-layer glass fiber PCB designed
-Mini and compact size dimension
-Three star-up modes selectable REM / DC offset / AUDIO
-Multiple ways of protection (thermal / over-current / short circuit)
-Adjustable and selectable the HP / LP, and signal as well
-Advanced IR class D designed

Spec:
-Output power (RMS) @ 4Ω: 2x100W
-Output power (RMS) @ 2Ω: 2x160W
-Output power (RMS) @ 4Ω bridged: 1x320W
-Output power (Max): 320 watt
-Freguency response: 20Hz-20KHz
-Distortion (THD): <0.08%
-Input sensitivity: 200mV-10V
-Signal to noise ratio: >90dB
-Dimension (LxDxH): 175x85x37mm

User Manual for Double Rock 2D39 (Click here)

For Boox One Storage fairing, Double Boox fairing, Small Boox 6x9 fairing, Choppa fairing: additional US$90/ set to upgrade
For other Fairings: Additional US$180/ set (Original US$225/ set)
(Batwing Small Fairing has no room for amp)

-4 channels
-Use high quality double Layer PCB
-Uniquely designed high efficient power transformer
-Power supply switching FET
-12dB / Oct stereo crossover filter
-High pass / low pass / full range switching function
-Use highly quality nickel guage input RCA and nickel guage
power terminal connector
-Use class D circuitry
-Power and protect indicators

Spec:
-Output power (RMS) @ 4Ω: 4x60W
-Output power (RMS) @ 2Ω: 4x85W
-Output power (RMS) @ 4Ω bridged: 2x180W
-Output power (Max): 350 watt
-Freguency response: 40Hz-18KHz
-Distortion (THD): <0.2%
-Input sensitivity: 250mV-6V
-Signal to noise ratio: >90dB
-Dimension (LxDxH): 128x103x44mm

User Manual for Nakamichi NGMD60.4 (Click here)