A12 Preamp Module Based on classic American preamp designs of the '70s, the A12 delivers an aggressive, immediately recognizable midrange with pronounced transformer coloration. Compatible with most 2520 style op-amp modules.

C84 Preamp Module The most "neutral" sounding module, the C84 is a kit version of one of the most popular transformerless preamp circuits. The C84 uses a combination of discrete transistors and IC amplifiers to deliver a very clean, uncolored version of your source signal.

J99 Preamp Module Many people consider the Jensen Twin Servo to be the finest microphone preamp ever made, and our kit version of this classic circuit has garnered a lot of praise as well. Transformer coupled at both input and output, the J99 can be configured to provide more than 80dB of gain. Accepts most 990 style op-amp modules.

N72 Preamp Module Our most popular module, the N72 adds the unmistakable character of Carnhill transformers to your recordings. The single-ended class A circuit is essentially the same as that used in the 1066, 1073, 1272, and other Neve console modules.

T15 Preamp Module Our simplest and least expensive kit, the T15 is quite possibly the best value in pro audio. Built around state-of-the-art integrated circuits from THAT Corporation, the T15 provides vanishingly low distortion and noise, +29dBu headroom, and superb audio quality. Best of all, it's simple to build and a great first project.

D11 Active DI Module Two independent, all-discrete, class-A DIs on a single module.  Optional output transformers provide for superior isolation when reamping.  Inputs can be jumpered to drive both outputs.

SC10 Discrete Op-Amp The SC10 is our "slightly improved" version of the Quad-Eight AM10 discrete op-amp. An all-discrete 13 transistor design, the SC10 retains the slew rate, bandwidth, and high output current capability of the original.

SC25 Discrete Op-Amp The SC25 is our "improved" version of the venerable 2520 discrete op-amp. An all-discrete 13 transistor design, the SC25 retains the slew rate, bandwidth, and high output current capability of the original.

SC99 Discrete Op-Amp The SC99 is our version of the Jensen 990 discrete op-amp. Built around the National Semiconductor LM394 "super-matched" transistor, the SC99 offers superior performance that is almost impossible to achieve with ICs alone.

PS03 Power Supply A sophisticated switching supply designed specifically for audio, the PS03 can deliver more than 80W of power to your preamp modules. Compatible with all of our current modules and the CH01 chassis. Features include jumperless universal AC input, over-current and over-temperature protection, two-stage LC output filters, and LED health indicators on each output rail.

CH01 Chassis Rugged steel chassis built to last a lifetime. Features include welded seams, internal mu metal shielding, powder coat finish, and PEM nut fasteners. More than just a cosmetic frill, a correctly shielded and grounded chassis is essential for the proper performance of your preamp modules. Accommodates 8 modules and a power supply.

WH01 Wiring Harness Connect your power supply and up to 8 modules with this prefabricated wiring harness. Made with 22 AWG stranded wire and MOLEX connectors, the WH01 makes chassis wiring easy and reliable. Includes ferrite core between first and second connectors for additional noise suppression. Compatible with all of our current modules and the PS03 power supply.