Conrad Johnson MF-2250A 120wpc solid state amplifier in good condition. I've gone with CJ tubes. I kept this for a while as it is such a gem, but I've become one of those guys with too many amps and I've not been using this one.The amp is really in excellent shape. Unfortunately, there are two very slight nicks, one on the left edge and one on the top edge that keep it from 9/10 rating. It is performing as it should sonically and, aside from the nicks, cosmetically excellent. I have taken photos to try to highlight them in the spirit of full disclosure. Please compare the natural photo of the full face to the close ups with the red circles and you can get a sense of how minor they are. The 2250A was an updated version of the 2250. The 2250 was released in 1998, the 2250A several years later with an upgraded power supply. (Note that the faceplate always says MF-2250. The MF-2250A designation can be seen on the serial number plate - see photo.) You can do online research on used prices asked for these units. Keep in mind that there is a significant difference between the 2250 and 2250A. The former tends to range from $800-$1000, the "A" upgrade model between $1000 and $1200. If you have CJ do the upgrade to a 2250, it will cost in the neighborhood of $800. In search of a warm, pleasing, non-irritating sound, I went through a number of solid state amps and finally into tube amp territory. This was the one solid state worth keeping. If you are looking for that kind of sound, this is a great choice for solid state. I have the factory box in good condition, stock power cord, manual reprint. It has an IEC jack for power so you can use your power cord of choice. The shipping package will be 42lbs and therefore fairly expensive to ship. Since I am in Alaska, I will bear some of the shipping costs. To the first 48 states - a flat $60 shipping with full insurance by Fedex Ground (they will still go by air from Alaska though - five to nine days). $75 for Second Day Air. Payment by Paypal; I will cover their fees. I am happy to answer any questions. From Conrad Johnson:
The overall circuits in these amplifiers used a combination of FETs, and bi-polar transistors. FETs were chosen for the gain stage because like tubes and unlike bipolars, they produce almost no strident odd-order harmonics. Bi-polar devices were specified for the output stages of these amplifiers for their low output impedance, resulting in improved bass response. Specifications:
Power Output: MF2250 - 120 watts per channel from 20Hz to 20KHz at no more than 1% THD and IM, both channels driven into 8 ohms.
Distortion: less than .1% THD or IMD
Response: bandpass 20Hz to more than 20kHz , +0, -.5dB
Hum & Noise: 100 dB relative to max output
Mechanical: MF2250 - 19" X 4 ¼ " X 16”
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