Behringer KM750, Black

I started looking for a low-cost replacement (I am retired and have far better things to do with $1000 than buy an amp these days). I read the KM750 reviews and comments on Amazon (none of the high-end magazines or audio webzines have reviewed it yet) and decided to take a chance because of the low price. br>br>As a point of reference, The Audio Critic reviewed the 4b in 1978, calling it "the best power amplifier we've been able to find so far" (Vol. 1 No. 4, p. 41). br>br>These are my first impressions of the KM750, which arrived today. br>br>While still in the box, the first thing that struck me was the lightness of it. In comparison to the 4B, this is especially true. It's easy to set up, but the binding posts aren't what I'd expect from a product labeled "binding posts. " They aren't three-dimensional. Posts that are one-way or even two-way are available. Only bare wire or pins are accepted instead of spade lugs or banana plugs. Because the tightening nut is non-removable, I believe the contact surface is also minimal. a performance At the very least, the pin/wire post can take up to a 10 (solid) copper wire and tightens up nicely. I wasn't planning on using a pair of SpeakON connectors, but I decided to do so today because they appear to be a better connection than these "binding posts. " br>br>Once everything is connected (RCA inputs, Stereo, etc. ), to my system (77V sensitivity, limiter on, ground isolation off) - It drives four Dynaudio 30W54 drivers in tuned enclosures, which are configured as a two-channel compound. I was pleased with the low/no fan noise once it was turned on, as I had read that some owners found the fans to be noticeably loud even when they were first turned on. When the room went quiet after a couple of hours of playing demanding music at fairly high volumes, the fan noise was almost imperceptible. br>br>Due to the fact that this amp is used below 100Hz (6db lopass), there is some mid-range noise. I can't hear how it sounds in the midrange and treble, and I'm unlikely to ever do so. It's still new, so things may change over time, but it's already doing a fantastic job driving the Dynaudio 12" (4 ohm nominal impedance) drivers to which it's connected. Very well-balanced, rich, and dynamic. Where the subwoofer meets the KEF/Class A MOSFET amplifier in the middle. This appears to blend in just as well as the 4B did before it. br>br>I haven't taken the top off or done any bench testing, but based on the heat dissipation limits of the heatsinks I've seen in photos, I'm guessing impedances well below 4 ohms would severely limit the amps output. br>br>So far (1 day), I'm very pleased; this amplifier performs well above its price. br>br>Update (3/21/18)br>I've had the unit installed and running for a few days now. It's still one of my favorites. There is nothing to be unhappy about. Because I occasionally heard a low-level 60Hz in the subs when they were idle, I moved the ground lift switch to the lift position. They've fallen silent completely now. I also used Neutrik SpeakON connectors for the speaker outputs because the terminals on the Neutrik NL4FX connectors are limited to "4mm2" for the screw type termination, which works out to about 11 stranded or 10 solid, so I added some 10 solid pigtails to my speaker wires to connect them to the NL4FX connector terminals. The SpeakON, in my opinion, offers a better mechanical and electrical connection than the 1-Wire. The amp comes with two way binding posts.

Sawyer Ferguson

| Feb 02, 2021

This amp is absolutely incredible! Five months later, there are still no issues. Amp is highly recommended! Original: br>br>Original: br>br>Original: br>br>Orig I got this for a ridiculously low price from the warehouse. With a Dayton Rss315HO-A, I'm powering my DIY home theater subwoofer. Driver with a resistance of 12 ohms and a current of 4 ohms The sub sounded anemic in stereo mode, lacking the authority of the 500 watt plate amp it replaced. I wasn't thrilled with it, but it wasn't so bad that I'd send it back. br>br>Then, one night after a few too many adult beverages, I made the executive decision to try bridging the amp and see what would happen. Let me say the sub came alive. I mean it came alive to the point where it was 'stereo', and gain almost 100%, but it still sounded anemic. However, in bridged mode, the gain isn't even half way, and the sub is still alive! [insert ominous laughter here] For home use, this is an excellent amplifier. Because I was missing a trigger control, which can be a pain, I bought one of these after reading about it on a forum: Since you now know how it's being used, you can write the actual review. br>br>It's a good weight. The quality of the construction and finish are excellent. Pins will suffice in the absence of banana plugs. I used only 12 gauge bare wire. The power light is a bright white LED that is both annoying and distracting. That annoyance was solved with a piece of electrical tape. The fan. What am I supposed to say? It doesn't sound horrifying, but it is annoying when you're watching a movie and it's in the same room with you. Cool air is drawn in from the top and warm air is exhausted from the left side; in a noisy commercial environment, the noise will go unnoticed; however, in your living room, the noise will be noticeable. br>br>All I had to do was simply unplug the fan. I measured internal temperatures for several days before, during, and after heavy home theater use and determined that the very small increase in heat will be easily tolerated by the electronics for many years to come. br>br>I recommend this amp. You won't find a better deal for the money, pound for pound, or watt for watt.

Joseph Martin

| Aug 16, 2021

In this scenario, the amplifier is being used to drive two Peavey Impulse 6 speakers (one per channel) in a church. This amp delivers a lot of clean power to the speakers. On the first power-up, the fan It was a little claustrophobic on the way up. After a couple of hours of burn-in, The noise from the fans subsided. I haven't had any issues with this amp overheating, so I'm confident in installing it in a wall. enclosure for a rack mounted I'm very pleased for the price; I've spent much more on amplifiers and have been pleasantly surprised by the sound quality, even at the top end. You will not be disappointed if you have high-quality speakers that meet the amplifier's wattage and impedance requirements. br>br>This is my first Behringer product, and I am extremely pleased with it.

Willa Cherry

| Nov 06, 2021