Reference audio monitor controller system with a Marconi-style 24-step rotary switch for volume, two sets of fully balanced analog inputs and outputs, high-quality headphone output, USB-C connectivity, and Bluetooth reception with the latest codecs

High-end, 3-stage 73-style 500 series microphone/DI preamplifier featuring 80 dB of British-style gain, all discrete through-hole components, and Class-A circuitry

All-in-one Heritage Audio channel strip featuring a high-end, 3-stage 73-style microphone/DI preamplifier with 80 dB of British-style gain, an expanded 73-style equalizer, and a diode bridge bus compressor taken from the Heritage Audio Successor

Boutique, passive-circuit monitor controller inspired by classic European console designs delivering the most transparent signal with the best stereo imaging of any other passive designs available

2x4 USB-C desktop audio interface with single integrated 73-style preamp, mic/line inputs, JFET DI, class-leading AD/DA conversion, and MIDI I/O

8-slot 500 series rack with ADAT output designed to rack any and all 500 series modules featuring On Slot Technology

Fully discrete 2-channel, 3-stage Class A mic preamp with 80 dB of gain - zero compromise, high-quality design

Ten-slot 500 series powered enclosure providing the cleanest, most isolated, and most abundant power to all 500-series modules

Six slot, professional, rack-mountable 500 series powered enclosure

Tube-driven optical compressor featuring fully transformer balanced input and output, tube saturation section, large friendly interface, and extensive attack and release control

2-channel 500 Series Tube Limiter/Compressor with Custom-wound Transformers, 5 Selectable Attack/Release Time Constants, and Continuously Variable Slope

Fully discrete, 3-stage Class A mic preamp/EQ with correct “Vinkor” type pot core inductors - zero compromise, high-quality design

Fully discrete 2-channel, 3-stage Class A mic preamp/EQ with correct Vinkor type pot core inductors - zero compromise, high-quality design

Four-slot 500 series powered enclosure providing the cleanest, most isolated, and most abundant power to all 500-series modules

Desktop monitoring system with Bluetooth and audiophile quality sound

Mic pre/EQ combining an all-discrete, Class A 73-style mic preamp with the famous 81-style equalizer

2x4 USB-C desktop audio interface with two integrated 73-style preamps, mic/line inputs, JFET DI, class-leading AD/DA conversion, and MIDI I/O