Seventh Circle Audio C84
Neumann/console-style transformerless "Double Balanced" mic preamp module
Preamp$279Manufacturer list price
Specifications
- Type
- Preamp
- Description
- Neumann/console-style transformerless "Double Balanced" mic preamp module
- Topology
- Transformerless, discrete "Double Balanced" circuit (Graham John Cohen, 1984), Neumann/console-style
- Signal path
- Analog
- Channels
- 1
- Channel format
- mono mic/line preamp
- Form factor
- module (SCA proprietary format)
- Connection
- SCA proprietary module format (CH02/PC01 chassis)
- DSP
- false
- Powered
- true
- Frequency response
- flat to below 10Hz (LF only stated; upper limit not published)
- 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: Neutrik PC-mount XLR mic/line I/O; requires separately-ordered CH02-SP-C84 subpanel; discrete Z-Buffer output drives 600-ohm load to +32dBu
Notes: Clones the transformerless 1984 "Double Balanced" console-style circuit (Neumann/console lineage) using polypropylene coupling caps instead of a transformer. On-board regulators accept +/-15VDC to +/-35VDC. Available as DIY kit or assembled (single listed price). SCA proprietary format -- fits SCA CH02/PC01 chassis only, NOT API 500-series (see C84-500 for that version).