4 microphone inputs and one line input summed to a single, mono output. All tube circuitry and socketed Altec 4722 input transformers. Crunchy and high gain. Great “character” piece.

All discrete, transformer balanced input/output design. Hi-z 1/4" input on front panel. Polarity, +48v phantom power, -20 dB pad, mic/hi-z switch all available on front panel. 7 segment LED VU level display. Tons of gain. Great on everything, except when the source sounds bad. Not a flattering preamp. GIGO.

Classic Audio Products of Illinois clone of API 312 design with output fader.

4 channel mic pre/line amp with 1/4" hi-z inputs. Based on Trident A-Range design. Excellent on drums.

API 312-style preamp custom designed for our MCI JH-636 mixing board by Nikhil Ranade with the help of Eliot Curtis.  The circuit design is dead simple and utilizes a Jensen JE-115K-E microphone input transformer followed by a 2520-style discrete op amp.  The output is transformerless.  Sonically very similar to the API 312 with less gain range.  Distorts nicely when driven hard.  We have 12 of these installed in our console.

Transformer balanced input and output.  No compromise design.  Very accurate, uncolored sound. Input=output.  Great on bass guitar.

Tube mic preamp built to the highest standard in West Germany.

Neve 1073 clone (minus eq stage).

Solid-state transformer balanced preamp as designed by Bill Putnam for Urei. Racked by Dan Alexander. Excellent sound quality. Same amplifier circuit as the Urei 1176 compressor/limiter.

Transformer balanced microphone preamps with eq. Sometimes referred to as the “Canadian Neve”. High build/sound quality.