Coil Audio CA-286 MK2 PS6 Preamp Module

The Coil Audio CA-286 MK2 single-channel preamplifier module based classic 1950s and 60s European two-stage amplifier. It boasts a European-style circuit, tubes, transformers, and high-end components and is powered by Coil's PS6 Rack Tray and Power Supply. Simply put - the CA-286 is the easiest way to get those Hi-Fidelity EF86 tube tones into your studio.

EUROPEAN TWO-STAGE AMPLIFIER

The CA-286 preamp is a tribute to the classic 1950s and 60s European two-stage amplifier made popular by Telefunken, Langevin, Collins, and Gates. The CA-286 excels in high fidelity recording applications providing the rich, detailed midrange often associated with vintage EF86 tube based preamps. The CA-286 employs Coil Audio transformers, high quality capacitors, resistors, and NOS octal tubes. For the microphone input stage the CA-286 uses the CT-110HN Super-Mu transformer based on a rare 1950s high fidelity coil. Detail oriented, it adds an excellent top and bottom extension with a smooth, breathy saturation. On the line out it uses the CT-41 transformer based on a popular 1960s Peerless design. Frequency response is ruler flat from 20 Hz to 30 kHz, dipping just below 1 dB at 60 kHz. Its smooth saturation imparts a rich, wooly, high fidelity sound to anything passing through it.

CONTROLS

The (INPUT) pad section contains a phase reverse switch, and a 4-position pad network: 0 dB, -6 dB, -12 dB, and -19 dB. The (NF) control varies the amount of negative feedback present in the circuit. Counter-clockwise brightens and moves the sound forward while raising harmonics and sensitivity. Clockwise increases negative feedback, producing a darker tone with a smooth, dampened harmonic structure. The (LOW) switch reacts with the NF, boosting or cutting low frequency while moving the low end from front to back in the sound stage. The (OUTPUT) control is placed between the 1st stage 6J7 and 2nd stage 6C5 tubes and sets the final level output level.

COIL AUDIO CA-286 MK2 FEATURES:

• Single-channel preamplifier module is based on the classic European two-stage amplifier made popular by Telefunken, Langevin, Collins, and Gates
• Coil Audio CT-110HN high nickel input and CT-41 output transformers installed
• 12-step switched negative feedback tone control with LOW filter
• Two-stage dual EF86 vacuum tube single ended parafeed circuit
• 42 - 54 dB of available gain
• 150 Ohm and 2k Mic input, 20k Line input, 600 Ohm output
• 4-position PAD for both Mic and Line Input
• True 180-degree Phase Switch
• Hand-built and tested in the USA