Black Lion Audio


Channel Strip - EQ & Mic Pre

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Eighteen line art

Program Equalizer and Microphone Preamplifier

Eighteen’s preamplifier circuit isn’t just another clone, but an original design built to pay proper tribute to some of the most classic designs ever made. The Eighteen starts with a Cinemag input transformer, but that’s far from where the magic stops. In order to get the absolute perfect sound we were looking to achieve with Eighteen meant a bit more work under the hood. This is where our new BLA1831 custom, discrete op-amp comes into play. Through an extensive period of component matching, we were able to create a custom op-amp that matched the vibe we were aiming for, while still matching a noise floor that is akin to modern equipment. The preamplifier also features polarity inverse, 48V phantom power, an 80Hz high-pass filter, and a 10kHz low-pass filter.


Vintage style preamp section with CineMag input and output transformers and custom discrete op-amps

CineMag inductor-based 2-band passive EQ lets you boost and cut frequencies simultaneously to add focus on the low end and presence at the top end

Output control for driving the preamp into rich harmonic saturation without signal clipping

Additional frequency control with 80HZ highpass and 10kHz lowpass filters

Switchable mic/line inputs, polarity flip, and 48V phantom power for condenser mics, active ribbon mics, and mic activators

Attractive backlit VU meter on the front panel

Internal power supply with AC input and voltage selector


Preamp Type: Solid State Induction EQ Preamp

Number of Channels: Single channel

Phantom Power: Yes

Polarity Switch: Yes

EQ: 2-band EQ, Lowpass Shelving, 80 Hz Highpass, 10 kHz Lowpass

Analog Inputs: 1 x XLR

Analog Outputs: 1 x XLR

Rack Spaces: 2U

Power Source: Standard IEC AC cable

Height: 3.5″

Depth: 6″

Width: 19″

Weight: 14.5 lbs.

Manufacturer Part Number: Eighteen