McIntosh C39 Solid State Preamp with Phono Input
Great full function preamp best used for a two channel setup. McIntosh called this an "Audio/Video Control Center".
Has 12 sets of inputs for even the most complicated stereo setups, including a phono input to connect your favorite turntable. Both RCA and XLR balanced type outputs to your amplifier(s).
In very good condition with no noticeable scratches or dents.
Fully tested and sounding wonderful.
Includes the preamp, remote and a power cord.
Click here for a PDF copy of the original Sales Brochure
Click here for a PDF copy of the original Owner's Manual
SPECIFICATIONS & PERFORMANCE LIMITS:
+0, -05dB from 20Hz to 20,000Hz
25V at Main and Switched 1 and 2 Outputs
Main, 600 ohms
MAXIMUM VOLTAGE OUTPUT
8V at Main and Switched 1 and 2 Outputs, from 20Hz to 20,000Hz
TOTAL HARMONIC DISTORTION
0.002% from 20Hz to 20,OOOHz at rated output
Phono: 2.5mV for 2.5V rated output, (O.5VIHF)
High Level: 250mV for 2.5V rated output, (50mV IHF)
SIGNAL TO NOISE RATIO
Phono: 90dB below 10mV input, (84dB IHF)
High Level: 105dB below rated output, (95dB IHF)
MAXIMUM INPUT SIGNAL
High Level: 10V
Phono: 47K ohms and 65pF capacitance
High Level: 22K ohms
Phono to Tape: 40dB
Phono to Main: 60dB
High Level to Tape: OdB
High Level to Main: 20dB
Bass and Treble variable, 12dB boost to 12dB cut
AC POWER OUTLETS
One switched for area A power amplifier, one switched for area B amplifier and one unswitched
120 volts, 50/60Hz, 25 watts
Front panel measures 17-1/2 inches (445cm) wide, by 7-1/8 inches (18.1cm) high. Depth behind mounting panel including clearance for connectors is 15 1/2 inches (39.4cm). Knob clearance required in front of the mounting panel is 1-3/8 inches (35cm)
Our Testing Process for Preamplifiers (All) at SkyFi:
We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage. Special attention is paid to the power supply which is the most common source of failure for preamps. We then power up the unit and run a simple 1k sine wave while monitoring the low voltage output on an oscilloscope for signs of distortion or noise to get a baseline.
At this point we will lubricate and clean all switches and potentiometers (that are not sealed) with a high quality contact cleaner, and then re-test all functions for any signs of noise or scratching.
Final testing involves putting actual music through the preamplifier We have learned over time that some issues are only noticeable to a trained ear while listening to a familiar source material. Our test bench has reference vintage Kef speakers that we are super familiar with which will quickly reveal any discrepancies. Some preamps will then move into the listening room where they will be tested with our in-house reference system.
Please click here for detailed specifics regarding our specialized packing process that separates us from the rest.
Yes - Power Cord