Donner Bluetooth 5.0 Stereo Audio Amplifier Receiver, 4 Channel 440W Peak Power Home Theater Stereo Receiver with USB, SD, FM, 2 Mic in Echo, RCA, LED, Speaker Selector for Studio, Home - MAMP5

My previous amplifier was a tube amp. But I burned something out (not a tube, I checked those) and I needed something that was less complicated than my old set up. My old set up was a tube amp for my front Klipches and a Class D amp for the back ones. I also have a 400 watt subwoofer.I used to feed those amps from my computer, which outputs to a discrete DAC.This is for my 10x10 home office, by the way. So I know it's overkill.So anyway - I got the MAMP5 and used 4 channels to bi-amp my front Klipches (these are the ones you can do that on). Then I just did normal 2 channel to the back. I used pre-out to go to my sub.Then I messed around with levels and stuff on the amp and on my sub.Those blue dials on the amp - don't turn them up past about 12 o'clock. Use the little black one on the bottom right to control overall level. The blue dials are just to set "ratio." And you keep them at less than 12 because you want to leave some headroom for loud things in your music.If you hear the fan - that's because you did something wrong. For example, I can make the fan come on by turning the blue knobs to almost zero, then cranking the main volume knob. Because the blue knobs are near zero, there's almost no sound coming from the amp. But it's still working hard. That's because I think the blue knobs basically just work like resisters and the black knob controls the actual amplifier. SO - put the blue knobs near 12 o'clock and the little knob at 9, or 12 if you want loud loud.I think if you turn the bass or treble up too high, that will also trigger the fans prematurely. So it you hear the fan, mess around with the volume & tone knobs.So what does it sound like? My original major in college was audio recording engineer, I used to do sound in a club, and I have done it for live bands, so I think I have decent ears.1) It's "trebly" - so turn down the treble. This could also be me going from tube to solid state. Either way, turn the treble down a little.2) bass needs to be turned up a little.3) Soundstage is good. Instruments and voices appear in 3D space about like I would expect.4) It doesn't sound grainy. That was my big worry.5) It's loud AF! If you adjust it right - you actually are getting 50 clean watts per channel. So with me biamping the fronts, I am getting 100 watts to each of those and 50 to each of the rears. These are efficient speakers and I can drive them to earsplitting level with almost no distortion.6) The remote works, but only controls volume for the bluetooth, USB and card reader and FM inputs. It won't control volume for aux or anything else that is plugged into the back with RCAs.7) When it does distort, it distorts the way that you would expect from a class-D (I don't think it's A/B for this price). So it's like clean, clean, clean, then holy moly. It's not linear.The fact they put in a loud fan and super ventilated the case tells me this is primarily intended for something like a retail store or a bar. My impression is that it won't prematurely fail. I think it's worth the money.

I couldn’t be happier with the Donner Bluetooth 5.0 Stereo Audio Amplifier Receiver! This amplifier has exceeded all my expectations in terms of performance and versatility. Here’s what I love about it:Powerful Sound: The 440W peak power provides a robust, clear, and crisp sound that fills the room effortlessly. Whether I’m playing music, watching movies, or hosting a gathering, the sound quality is always impressive.Bluetooth 5.0 Connectivity: The Bluetooth 5.0 feature ensures a stable and fast connection, making it super easy to stream music from my phone or other Bluetooth devices without any interruptions.Multiple Input Options: The inclusion of USB, SD, and FM options gives me the flexibility to play music from various sources. The RCA and 2 mic inputs are perfect for both music listening and karaoke sessions, which I really appreciate.User-Friendly Interface: The controls are intuitive, and the LED display adds a nice touch. I love the speaker selector feature that allows me to manage my setup with ease, and the echo function for the microphones is fantastic for karaoke nights.Versatile Design: It looks great in my home studio setup and blends well with my other equipment. It’s not bulky, and its sleek design makes it easy to integrate into any space without feeling overwhelming.Great Value: For all the features it offers, this amplifier provides exceptional value. The sound quality, connectivity options, and overall performance make it a solid investment for anyone looking to enhance their home theater or audio setup.Overall, I’m extremely satisfied with the Donner MAMP5 and would highly recommend it to anyone who wants to elevate their audio experience. It delivers on all fronts and offers great value for the price!

Replaced a standard amp/receiver with this to run a pair of indoor and a pair of outdoor patio speakers. With my old receiver, to listen to music outside the volume was so high inside, I'd have to turn the indoor speakers completely off. Now I can adjust the volume on each pair to the right level. The remote is a little cheapy but I only use it to turn it on and off. The sound quality is fine for what we're using it for. The bluetooth works great. Using an old iPhone for music and it operates from outside on the patio with no issues. It's really a great inexpensive option for running multiple speakers at different volumes.UPDATE: So I was noticing a lot of songs didn’t sound right. Originally thought I had bad speakers or wiring. After a lot of trial and error I finally figured out if you listen to a lot of classic rock where you have guitar, etc. only playing on one channel, you have to wire a set of speakers - 1 on A-B channel and one on C-D channel to get the true stereo sound (and then set the volume for each the same). Once I did that, it sounded so much better. Downside is you’re really limited to just 2 separate volume zones and you have to adjust 2 volume levels anytime you change them. That said, it’s still a good inexpensive option for what I’m using it for. Hope this update helps someone else having the same issue I had.