Seventh Circle Audio A12-500
API-style single-stage transformer mic preamp module, 500-series format
Preamp$389Manufacturer list price
Specifications
- Type
- Preamp
- Description
- API-style single-stage transformer mic preamp module, 500-series format
- Topology
- API-style single-stage transformer-coupled, discrete SC25 op-amp
- Signal path
- Analog
- Channels
- 1
- Channel format
- mono mic/line preamp
- Form factor
- module (API 500-series/Rev G format)
- Connection
- API 500-series (Rev G) lunchbox format
- DSP
- false
- Powered
- true
- Country of manufacture
- USA
- Phantom power
- 48V
Details
Controls: 12-position Grayhill stepped gain switch (15-70dB in 5dB steps), gain trim (up to 6dB cut), phase reverse switch, phantom power switch
I/O: 500-series edge connector I/O; CineMag CMMI-8-PCA input transformer (18dB step-up), CineMag CMOQ-2S output transformer standard
Notes: Clones classic American (API-style) early-1970s single-stage transformer preamp design; built-in discrete SC25 op-amp; optional 2L/2H nickel-core output transformer upgrade (+$45-65). FLAG: genuine API 500-series-compatible module -- distinct from SCA-proprietary-format 'A12B' classic-series module. Available as DIY kit or assembled.