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I recently bought a nice condition M-501 amp here on ebay from this great seller. I downloaded the manual online, and the basic specs are below. Specifications 150 watts per channel, min. RMS, at 8 ohms, both channels driven, from 20Hz to 20Hz, with no more then 0.09% THD. Total Harmonic Distortion: 0.09% at 150 watts IM Distortion: 0.09% at 150 watts Damping Factor: 60 at 8 ohms Frequency Response" 5 - 100KHz +/- 1dB Signal to Noise Ratio: 100dB (1HFA-202 1 watt output) General Power Supply: AC120V, 60Hz Dimensions (W x H x D): 455 x 150 x 350mm 17-15/16" x 5-7/8" x 13-3/4" Weight: 10.5kg. 23.1lbs Im using this amp to power the MTM (mid-tweeter-mid) array on some old AR3 towers, rated at 250 WPC RMS power handling. Even though this amp is rated at 150 WPC RMS, it still can play the ARs relatively loud, and clear. It will kick in the protection circuit though if I try to play it very loud, but thats understandable considering im using it to power 250 WPC rated speakers. Its a great amp yet it only weighs 23 pounds and is only 11 1/2" deep(not including front handles). This is a fantastic old amp, sounds loud and clear and I highly recommend getting one if you need a good 2 channel amp in the 150 watts per channel range for powering mid/upper ranges. Read full review
Verified purchase: Yes | Condition: Pre-owned
this Amp has lots of power ,very clean sound ,it lacks gain control for integration into multi amp systems, and is not stable driving low ohm loads ,would be an excellent zone two amp
Verified purchase: Yes | Condition: Pre-owned
Well built, very powerful amplifier. Excels with certain genres, including electronic/dance and some rock, but can sound somewhat clinical and dry for others such as classical and female vocals. Generally very good performance, but is no match for the musicality of a decent valve amplifier. The sound gets better as the amplifier warms up. If you need lots of power (150W per channel), this is a good amplifier to consider.
A substantial piece of electronics, everything about it feels good, from the look, to the feel of the switches. The power really brought out a lot of things I wasn't hearing with my Onkyo 85 wpc home theatre receiver. It had a pre-amp out, so I thought I'd try the M-501. It completely changed the sound of my Yamaha NS 70T's, JBL 4410 Studio Monitors, and Yamaha NS A-10.3's(ever heard of these?) Now I guess the next upgrade would be a compatible dedicated Preamp. And experiment a bit more with speaker placement, difficult in a small house, but what could pose a nicer challenge?
Verified purchase: Yes | Condition: Pre-owned
Using my M-501 to power 2 Svs Prime Pinnacle tower speakers. Has been working great so far and has taken a load off of my Avr.
Verified purchase: Yes | Condition: Pre-owned
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