The NXL300 R4 audio amplifier module is based on the high performance nxV500 R2 module. Unlike the nxV500 which has eight Toshiba output devices this version has four high performance Exicon Lateral MOSFET's in it's output stage. Making it a much more compact but no less powerful. Boasting a power output of around 200 watts RMS into 8 Ohms and 350 watts RMS into 4 Ohms.
It also has XLR Balanced input which can be easily configured for RCA or unbalanced input.
The sound quality is in the same league as the very popular nxV200 and the nxV500 modules, making it an ideal companion to the nxVxxx range of amplifiers.
The Printed Circuit Board is a double sided plated through hole and SMD extra heavy duty 2 ounce copper foil with Gold immersion plating and the layout includes a low noise ground plane on the underside of the PCB.
Like all of the R4 modules in the NXV and NXL range it has the capability of using separate power supplies for the input and drivers stages.

Specifications

200 Watts RMS continuous sine wave into 8 Ω 
350 Watts RMS continuous sine wave into 4 Ω 
The HPA-NXL300 R4 Signature is 2 Ω Stable
Biased into Class A/B
Power Bandwidth 3.5hz to 300khz -3dB
Slew Rate = 60v /uSec
Dampening Factor At 100hz 8Ω = 800
RCA Single ended Input impedance 33kΩ
Single Ended Input Gain = 30.6dB
SNR -105dB
THD-N = 0.005% @ 10 watts 8 Ohms
Recommended Linear Voltage Supply +-70 volts DC
PSU Power Transformer secondary windings 50vac (400VA - 500VA)
Printed Circuit Board Dimensions 110mm+- x 50mm
Recommended Conrad Heat Sink MF35-75
Ultra small form factor PCB
Designed as high performance Home Theatre multi-channel amplifier
Or High End 2 Channel stereo amplifier
Unconditionally Stable into any load from 4 ohm loads and up
Extra Heavy Duty Two ounce copper printed circuit board
Rugged high performance complementary Lateral MOSFET Output Stage.
The amplifier module comes with a comprehensive installation manual.

Basic list of parts needed to build 1 x Mono Block NXL300 R4 Amplifier.

• 1 x HPA-NXL300 R4 Amplifier Module
• 1 x HPA-PSU One R3 Power Supply Board or PSU Two Power board
• 1 x HPA-Power One R4 AC Mains Controller
• 1 x HPA-SS/Relay One Loudspeaker protection
• 1 x 400VA toroidal power transformer with 2 x 50VAC secondary windings
• 1 x Conrad MF350-75 heat sink