Was supplied with two A equalizers, a JC1SM, two D and two D1 equalizers. Note that only one option can be operational at a time. Flat Response: Provides for flat gain of front end for microphone and Strain Gauge: Provides equalization and d.c. Special Phono Equalization: For B&K test records.ĭ. Uses system B plug-in equalizersĪnd is for high-output magnetic cartridges.Ĭ.
#Mark levinson no 27 amplifier specs Pc
The JC-1SM pre-preamp which consists of a PC board with external componentsĪnd a sixth potted amplifier module. This preamp has provision for a number of different frontend options whichĪre installed by plugging in different equalizer boards and, in one case, Gold-plated socket receptacles on the master PC board. Have a number of protruding gold-plated pins on each and plug into mating All of these modules and equalizer boards Two output amplifiers, and an active power supply decoupling filter for The five potted modules are the active circuitry for the two phono preamps, On this PC board are five active potted modules, miscellaneous Rs and Csįor bypassing, gain determination, and coupling functions, two plug-inĮqualizer boards for the phono function, and space for a JC-1SM pre-preamplifier. All of the metalwork is black anodized aluminum.Ī single master PC board occupies most of the internal space inside theĬhassis and is mounted to the bottom cover with 10 threaded metal spacers. Separate top and bottom pieces are bolted to theĬhassis to enclose the unit. A rack-width, two-inch-highįront panel is bolted on the front of the chassis piece with the rotaryĬontrol bushing nuts. That forms the rear panel, sides, and front. The metal sheet preamp chassis is bent into a closed shape Physically, the preamp is in two parts, the preamp itself and a separate The circuitry wasĭesigned by John Curl, a competent, well-travelled audio consulting engineer. The Mark Levinson JC-2 is a quite interesting attemptĪt producing an audiophile perfectionist's preamp. Line Section Frequency Response: Flat ☐.2 dB, 20 Hz to 50 kHz -1 dB atġ2 Hz and 100 kHz. at 1 kHz:-88 dB, 20 Hz to 20 kHz equivalentīandwidth. Phono Section Five systems available system A, standard, has specificationsĪs follows. 1976) Home | Audio Magazine | Stereo Review magazine | Good Sound | Troubleshootingĭepartments | Features | ADs | Equipment | Music/Recordings | History 1976) Mark Levinson JC-2 Straight-Line Preamplifier (Equip. Mark Levinson JC-2 Straight-Line Preamplifier (Apr.
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