GSJ Amplifier Details

Why, what, where, how. Specific details of what you get when ordering a GSJ enclosure, assembly instructions & proposed Class D modules to use.

  • Ordering a GSJ Amplifier Case, what do you get?
  • List of suggested Amplifier Modules & power supply.
  • Is the GSJ Amplifier case only suited to the suggested modules?
  • Instructions?

GSJ Amplifier Case, what do you get?

  • Empty Amp Chassis
  • Power Connector
  • VU Meter Driver Board CURRENT VERSION
  • VU Meter - FRONT
  • Used for the main page.

Parts list for the GSJ enclosures are 100% Aluminium, machined & anodised to the highest of standards, parts include:

  • 3 x Feet
  • 2 x Handles
  • 1 x Heat-Sink bridge
  • 2 x Heat-Sink
  • 1 x Left VU Lock
  • 1 x Right VU Lock
  • 1 x Back Plate
    • (Holes already machined) –
    • 2 x XLR,
    • 4 x Speaker Binding Post,
    • 1 x Neutrik Speakon NL4/8,
    • 1 xIEC320 Power
  • 1 x Top Plate
  • 1 x Bottom Plate
  • 1 x PSU Bridge
  • 1 x Front Panel
  • Screws

To make this Amplifier Chassis Kit exclusive, we also added the following auxiliary components;

  • 2 x VU Panel Meter – Audio Power Amplifier, Indicator DB Table Level Header with Back light
  • 1 x TA7318P VU PCB Driver for Analogue VU Meters
  • 1 x Halo Power Button
  • 1 x IEC320 C14 Plug

Suggested Amplifier Modules & PSU’s for those who want to plug & play.

When designing an amp enclosure, one of the prerequisites included it had to be modular by nature. Meaning “one size fits all”. However, this isn’t as easy as is sounds, with such a variety if amplifier modules available a choice had to be made. Class D was the obvious option partly due to their versatility.

Currently there are many class-D amplifiers on the market now, and the best of these are dominating the upper reaches of the high end. As such, brands chosen were purely based on their merit. However as time elapses, this will evolve, for example Purifi Audio is currently on our list to incorporate.

Hypex – Amplifier Modules

  • NC100HF_01xx
  • NC122MP_02xx
  • NC250MP_01xx
  • NC400_04xx
  • NC502MP_01xx
  • NCORE_500_01xx

Hypex – SMPS

  • SMPS_400_14xx
  • SMPS_600N400_03xx
  • SMPS_600N400_05xx
  • SMPS3KAxx0_08xx


  • L-PRO2
  • L-PROS
  • S-PRO2
  • T-PRO1
  • T-PRO2
  • U-PRO1
  • U-PRO2
  • U-PRO2S
  • U-PRO2SD

NewClassD –

  • NCDX
  • Singularity 1
  • Singularity 2
  • Singularity 3
  • 2018 Big Cap Power Supply modules.
Pascal Class D Amplifier Module.
Pascal S Pro2 Series Class D power amp.

Not limited to the suggested modules, alternative amplification classes are more than welcome.

GSJ Amp enclosures are capable of housing a variety of modules from various Class backgrounds. Though some additional mounting screw holes will be required if you deviate from our suggested Class D modules we’ve designed around.

The heat-sinks are sizable enough for the most demanding of “Power Transistors”.

Dimensions Internal:

  • Working width: 330mm
  • Depth: 398mm
  • Working height: 112mm

External Dimensions:

  • Width: 430mm
  • Depth: 315mm
  • Height: 102mm

Video instructions.

We have no written instructions, however we do have a Youtube channel dedicated to the GSJ Power Amp, showing everything from assembling the core chassis to inserting various modules, including how to upgrade if you wished to do so.

As an illustration the videos embedded are in date order. So start at the bottom and work your way up.