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Up for sale is my McIntosh MA 230. I’ve had it since 2012 when I purchased it from McIntoshAudio.com. The McIntosh MA 230 is a tube amplifier integrated with a solid state preamp with 30 WPC output. Amp comes equipped with four electro-harmonix 7591AEH output tubes, two Telefunken 12AU7 tubes, and one Telefunken 12AX7 tube.
In June of this year, I took the amplifier to DeWick Repairs to have a hum repaired, I live two hours away from Knoxville, TN where DeWick Repairs is located. I explained to Terry I was going to sell the amplifier and asked him to give it a thorough check. The hum was repaired, a capacitor was replaced, and Terry reported the overall condition of the amplifier was excellent; near mint. The lettering for the On/Off rocker switch is worn, but all the other lettering's on the front panel are fine. Some of the letterings on the back panel are worn but easily identifiable. There is hardly any noticeable pitting on the chrome and a very faint surface scratch above the ground binding post. The front, sides, top, and bottom are all in excellent condition. The only issue is the glass front panel is labeled with MA 5100. When I purchased the amplifier from McIntoshAudio.com, the original glass was cracked, so an original MA 5100 glass plate was substituted. The MA 5100 glass plate’s dimensions are exactly the same as the 230s. The warm sound of tubes, tight bass and drums, tonal balance, and exceptional imaging has provided an excellent listening experience over the past five years. I'm motivated to sell this amplifier and I'll consider reasonable offers.
The cost to ship is not included in the sale. CONUS and PayPal only. I will drive up to 2 hours from Asheville, NC for local pickup, cash only.
The following is the original description and specifications copied from Roger Russell’s website:
MA 230 Preamp-Amplifier
ELECTRICAL: Stereo. Hybrid (solid state preamp and tube power amplifier). 30w/ch stereo, 60w mono. Response 20-20kHz (+0 -0.5dB). Distortion 0.5%. Noise and hum -75dB high level, -60dB low level . Output impedance 4, 8 and 16 ohms. Damping factor 10. Input sensitivity and impedance: high level 0.25V at 250k, phono 1.5mV at 47k, tape head 1.5mV at 1 meg. Tape output 0.25V into 25k. L+R output 10V into 5k. Dual concentric tone controls +18dB to -18dB. LF filter 50Hz at 12dB/oct. HF filter 5k at 12dB/oct.
FRONT PANEL: Glass panel at top. Anodized gold at bottom. Input selector: aux, tape, tuner, phono 1, phono 2 and tape hd. Bass and treble each dual concentric. Volume. Mode selector: L to L+R, R to L+R, stereo rev, stereo, mono (L+R), L+R to L and L+R to R. Balance. Rocker switches: comp: RIAA or LP, tape monitor, phase: 0 or 180, speaker: on or off, power: on or off, LF: flat or filter, HF: flat or filter, loudness: flat or compensate. Headphone jacks. Red power indicator.
BACK PANEL: Barrier strips for 4, 8, and 16 ohms, Outputs: Tape and L+R. High level inputs: tape mon, aux, tape and tuner. Low level inputs: ph 1, ph 2 and tape hd. Ground binding post. AC outlets: 2 switched, 1 unswitched. Fuse.
TUBES: 4-7591, 2-12AU7, 12AX7.
Size 5-7/16"H, 16"W, and 14-1/2"D. Weight 43 lbs. Sold from 1963-1966. Last retail price $349.00
Thanks for looking.
This ad was originally posted on US Audio Mart.