{"product_id":"coil-audio-single-channel-ca-286-ps6-modular-mic-line-amp","title":"Coil Audio CA-286 MK1 Single Channel PS6 Modular Mic\/Line Amp","description":"\u003cp\u003eThe \u003cstrong\u003eCoil Audio CA-286\u003c\/strong\u003e is a two-stage amplifier based on circuits used by Langevin, Collins, Gates, and Telefunken during the 1950s and 60s. Each amplifier uses Coil's custom interchangeable transformers, NOS capacitors and resistors, and a pair of NOS EF86 vacuum tubes. With the addition of a flexible input pad network, the Negative Feedback tone shaping, and inter-stage volume control, the CA-286 is a timeless and flexible amplifier that compliments any microphone collection.\u003c\/p\u003e  \u003cp\u003eThe PS-6 version is a fully removable module for use with the 6 channel PS-6 Rack Tray. Each amplifier is easily removable via two thumb screws for flexibility, expandability, and transformer substitution.\u003c\/p\u003e  \u003ch3\u003eControls:\u003c\/h3\u003e  \u003cul\u003e \u003cli\u003eThe (INPUT) pad section contains a phase reverse switch, and a 5 position attenuation network of Balanced H-pads. The first four positions are various 150\/250 Ohm mic pads; -6 db, -12 db, and -19 db. The final (LN) position allows line-level signals to run through the amplifier providing tone-shaping capabilities while mixing. It works as both a second-stage booster for other preamps, and a summing\/buss amp for program and mix material. Two amplifiers can also be chained together to create the multi-stage, high gain recording path of a vintage tube console.\u003c\/li\u003e \u003cli\u003eThe NF, HI, and LOW controls all interact to create a unique tone-shaping circuit. 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. Turning it clockwise increases negative feedback, producing a darker tone with a smooth, dampened harmonic structure.\u003c\/li\u003e \u003cli\u003eThe HI switch transitions from the natural openness of the tubes, to a gentle filtering of upper frequencies. 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.\u003c\/li\u003e \u003cli\u003eThe Output control knob is placed between the 1st and 2nd stage EF86 tubes. It sets the final level and offers further control of the two-stage gain structure.\u003c\/li\u003e \u003c\/ul\u003e","brand":"Coil Audio","offers":[{"title":"Default Title","offer_id":44450132525159,"sku":"80949","price":2399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/8848\/5479\/files\/coil-audio-ca286-ps6_80949_1_5478b2fb-d247-4bee-a978-2fbef7430f84.jpg?v=1787091828","url":"https:\/\/vintageking.com\/products\/coil-audio-single-channel-ca-286-ps6-modular-mic-line-amp","provider":"Vintage King","version":"1.0","type":"link"}