Descripción
McIntosh MC240
40 WPC Tube Power Amplifier (1960-1969)
Made in USA
McIntosh MC240 (rated 40 watts continuous output per channel with less than 0.5% THD at any frequency from 20 ~ 20,000 Hz, measured output 47W at 1 kHz at <0.5% THD, 56 pounds/25.4 kg, measured 145 watts idle power draw.
Of course the MC240 sounds completely lucid, fluid and detailed as you expect from top-end tube amps, but what you probably don’t expect is that it has bottomless bass thanks to its huge transformers and special patented design that offers low distortion and flat response down to 3 cycles! MC240 has better bass response than many of today’s preamplifiers and power amps, along with the astonishingly lifelike midrange and a high end that simply shimmers.
No other amplifiers have McIntosh’s Unity Coupled circuit, that along with its huge Bifilar-wound output transformers, lower the distortion to the lowest levels found in tube amplifiers. This unique circuit cross-couples the two 6L6GC output tubes into such a tight a lover’s embrace that they operate as class-A at the most important audio levels. The circuit is so linear and independent of tube characteristics that it plays at low levels even with one output tube missing!
Rated Output Power
40 WPC (16.02 dBW) stereo into 4Ω, 8 Ω, 16Ω, 125Ω (70.7V) or 600Ω (140V) from 20-20,000 Hz with less than 0.5% THD.
80 watts mono into 2Ω, 4Ω, 8Ω, 16Ω or 32Ω depending on output connections.
Inputs
Three switch-selectable inputs, all 250 kΩ:
MONO
One mono input jack with a level control.
500mV minimum to 30V maximum input for rated output.
TWIN
Two input jacks, each with its own level control.
500mV minimum to 30V maximum input for rated output.
STEREO
Two input jacks.
No level control, but there is a balance control to fine-tune the system’s balance between the two channels.
Level fixed at 2.0V input sensitivity for rated output.
Frequency Response
16 ~ 40,000 cycles +0, -0.1 dB at rated power.
16 ~ 60,000 cycles +0, -0.5 dB at rated power.
10 ~ 100,000 cycles +0, -1.0 dB at half rated power.
Phase Shift
± 6º 20 ~ 20,000 cycles.
Signal to Noise Ratio
≥ 90 dB below rated output.
This is ≤ -73.98 dBW or ≤ 566 µV or ≤ -64.95 dBV.
THD
< 0.5% from 20 ~ 20,000 cycles at rated power.
≤ 0.3% typical.
IMD
< 0.5% for peak powers up to twice rated power for any two frequencies from 20 ~ 20,000 cycles.
Damping Factor
> 10, regardless of selected output impedance.
Output Connectors
Barrier block, 3/8″ spacing for low impedance loads.
Octal socket for high impedance loads.
Tube Complement
(4) 6L6GC or 7027A for output.
(3) 12AX7.
(2) 12BH7.
(2) 12AU7.
Quality
Made in Binghamton, New York, USA.
Construction
Sheet steel chassis.
Power Input
105-130 VAC 50 ~ 60 cycles.
Negative temperature coefficient thermistor for inrush current limiting for soft turn-on.
Rated Power Consumption
145W at idle.
270W at full power.
3.2A slo-blo fuse.
3A internal B+ fuse.
Size
8 x 10-3/4 x 17-1/2″ HWD.
Weight
56 pounds.
65 pounds as shipped.
Valoraciones
No hay valoraciones aún.