Excellent! High end sound with low end price. I pair two 2155's with 1155 preamp (bridged mode). 4 JBL signatures 2-C36 2-C38 with A130 15 " woofers, 750LH horns, N1200 crossover rated at 16ohms. These speakers were built in 1956 bought new by my father. The 2155's bridged have improved overall treble and bass response. IMHO this pairing is nothing short of sweet and clean.

Could be overpowering the speakers.

Bought 3 of these in the 2000s to complement my NAD 7155 receiver and to power additional rooms, great sound. Old eq though, the 7155 and one 2155 each "lost"a channel, I'll probably get the 7155 fixed as I bought it in June 1984, few weeks before my "big son's" birth. He has taken over my NAD 2200 and custom JS Audio speakers, but I'd like to leave this to him as my first piece of NAD gear. On a side note, I bridged 2 of these to drive a pair of KEF 103.2s that I got a few years ago and the 30+ year old KEFs couldn't handle the 150 WRMS, had to replace the mid woofers. The protection circuits in the KEFs (small bulbs) had burned out, LOL, so now I'm very cautious with them.

They are old! Usually you'll get ground hum on one channel or it'll "cut out" until you crank up the volume, but it's dying. It's about $150 to $200 to fix, hard to find a quality shop that will repair/upgrade, you have to search various forums and a lot of times the best reviewed shops are closed.

I had the 7155 receiver and always wanted to pair it with a 2155 amp and run both in bridged mode, but could never pony up the money in the 1980s. I've had a few 2200s, about twice the power; I gave one to my grown son a couple of years ago. The other one developed a hum on 1 channel, so I put it aside and was looking for a great repair shop, but the 2 that I had in mind folded. About a year ago, I saw a 2155 on ebay, cheap! I bid on it, then saw another cheap one (sub $100), so I bid on that. Wouldn't you know, I won both. I bridged them and hooked them up to my KLH Model 23s (using a Yamaha RX-V1500 as a preamp), but something was lacking compared to the 2200; my wife, kids, and neighbors disagree, LOL. It's very good, just not great, as I remembered the 2200. They did blow one of my KEF 103.2s, unfortunately (the max output is 250 WPC on program peaks, which is the KEF max). I just picked up a 2400 amp 2 weeks ago for less than the price of the 2200 repair, so that will go to the KLH 23s, while my 7155 and 1 2155 will go into the BR (bridged) to power various speakers that I change out from time to time; I might use the remaining 2155 for my center channel and dedicate the R-XV 1500 to a pure preamp role. If you can pick one of these up for less than $125, go for it but if you get above $150, go for the 2200, 2400, 2600 or 2700; My 2400 was $180 shipped, a great deal. Good luck.

I have used this amplifier for over 20 years, driving a pair of Magnapan SMGs, and just love the sound. Although I do not have a very large room, it is big enough, and I have never needed to turn up the volume more than about half way. Beautiful, crist sound. One of the output terminals is currently not functioning (I cannot drive two sets of speakers at the same time), and rather than replace this old beauty with a newer amplifier, I found a copy of the service manual at HiFiEngine.com, and will repair it. If you can find one of these on eBay or somewhere else, I recommend that you pick it up. You will not be sorry.

Just what you'd expect from the boys at NAD: upper-class sound at a lower-class price. It doesn't add or take away from the material, just simply amplifies it by about 110 watts total! There's the rub, I've noticed it's limits in larger rooms with efficient speakers (XQ-1s). I've also used this to power a 10" JL sub in a small room and it did fantastic! If you can find two of these, NAD recommends bridging them so you have a 250 watt system, doubling the power with wonderful headroom. NAD seems to be vague about how to bridge this thing, so here's a link to a similar amp: http://terry.rudys.net/?p=687