T
Tim Ryan
New member
Get the color and character of classic solid state preamp designs with Seventh Circle Audio preamp kits. Improve your signal chain, save money, and learn something while you're at it! All preamp kits feature:
* High quality double sided circuit boards, made in USA. Single board design eases assembly and minimizes errors.
* Grayhill rotary switches for stepped gain control. 5 dB steps provide precise, repeatable gain settings.
* Bourns conductive plastic pots for gain trim. Up to 6 dB cut allows "in between" gain settings.
* C&K toggle switches for phase and phantom power switching.
* Neutrik XLR connectors.
* Local voltage regulators for improved channel isolation, reliability, and flexibility.
There are currently two power supplies and two preamp modules available, with more on the way. All modules are designed to fit our rugged 2U chassis, the CH01.
Preamps:
N72 - A modern recreation of the BA283 circuit used in the Neve 1272. Two carefully implemented gain stages provide up to 70dB of gain with better bandwidth than many racked "vintage" modules.
J99 - A kit version of the famous Jensen Twin Servo preamp. Dual gain stages yield high gain, wide bandwidth, very low distortion, and extremely low noise.
A12 - Coming soon! A full-featured single op-amp kit modelled on the API 312. Fully compatible with the 2520 discrete op amp. Adjustable on-board voltage regulators for easy swapping of op-amp modules.
Power Supplies:
PS01 - +27V, +48V supply for N72-only systems.
PS02 - +/-27V, +48V supply for mixed systems.
Chassis:
CH01 - Rugged, heavy gauge cold rolled steel chassis provides superior durability and shielding from external magnetic fields. Heavy mu metal power transformer shielding. 3/8" aluminum front panel. Black powder coated chassis and beige panel, drilled and punched for 8 modules and a power supply.
For more details and prices, have a look at our web site, and be sure to check out the message board while you're there.
* High quality double sided circuit boards, made in USA. Single board design eases assembly and minimizes errors.
* Grayhill rotary switches for stepped gain control. 5 dB steps provide precise, repeatable gain settings.
* Bourns conductive plastic pots for gain trim. Up to 6 dB cut allows "in between" gain settings.
* C&K toggle switches for phase and phantom power switching.
* Neutrik XLR connectors.
* Local voltage regulators for improved channel isolation, reliability, and flexibility.
There are currently two power supplies and two preamp modules available, with more on the way. All modules are designed to fit our rugged 2U chassis, the CH01.
Preamps:
N72 - A modern recreation of the BA283 circuit used in the Neve 1272. Two carefully implemented gain stages provide up to 70dB of gain with better bandwidth than many racked "vintage" modules.
J99 - A kit version of the famous Jensen Twin Servo preamp. Dual gain stages yield high gain, wide bandwidth, very low distortion, and extremely low noise.
A12 - Coming soon! A full-featured single op-amp kit modelled on the API 312. Fully compatible with the 2520 discrete op amp. Adjustable on-board voltage regulators for easy swapping of op-amp modules.
Power Supplies:
PS01 - +27V, +48V supply for N72-only systems.
PS02 - +/-27V, +48V supply for mixed systems.
Chassis:
CH01 - Rugged, heavy gauge cold rolled steel chassis provides superior durability and shielding from external magnetic fields. Heavy mu metal power transformer shielding. 3/8" aluminum front panel. Black powder coated chassis and beige panel, drilled and punched for 8 modules and a power supply.
For more details and prices, have a look at our web site, and be sure to check out the message board while you're there.
. Why? because I get to learn what more experienced audio recordists consider "fat, warm" or "good sounding." I hear their samples and it helps me decide how to interpret their opinions on gear. It teaches me details I wouldn't normally learn on my own and it helps me make more informed gear purchases.
