LP-838 2.1 Bluetooth Amplifier 38W+38W+50W Power Output with Remote Control Function, 2.1 Channels Bluetooth Amplifier Supports Bluetooth/USB/RCA Input(with 12V/5A DC Power Supply)

The amp more than met my expectations; used for computer/bedroom size room quite adequately. Good loudness with amp set at about 30-40% volume with preamp volume at 50%. The bass amp is even more powerful. Main speakers are Optimus 2-way (4ohm) with bass amp setting at about 10% with 6" passive tuned port subwoofer. You can shake the walls with bass amp set at about 30%. Not currently using the remote since amp is close to the PC; should be quite helpful as a TV amp volume controller while sitting away from TV. I'm considering buying a second amp for rear speakers. Like the compact size. Noticed that turning off power via a power/surge protector results in the common bass thump in the speakers as charged capitors are unloaded. There's quite a difference of opinion as to whether the amp or the supply power should be shut down first (you decide what's best for you). Simply a great amp at a great price. Totally satisfied and recommmended, both item and supplier. Enclosed RCA to 3.5mm input cable is also appreciated. 5 stars !!

Claiming 126 watts of power then shipping a 60 watt supply is pretty disingenuous.NO subwoofer connector supplied. (It takes some odd shaped proprietary green connector, where am I going to find that?) Used some alligator clips for the checkout.Subwoofer volume not controlled by the main volume.Hooked a passive 8" sub up initially, nothing huge and immediately noticed buzzing in the audio out, not loose rattling, buzzing. Still, thought sub might be tired.Then hooked up main speakers, some decent Klipsch bookshelves and heard buzzing in them as well.Wish I had a distortion analyzer, it's gotta be over 10% for this thing. Then I noticed the volume kind of wandering around getting softer/louder on its own.This thing is junk.I should have bought a used receiver from FB marketplace for around the same price and got a $10 BT module for it.I had an audio generator ap on my phone and found 2 different buzzes around 150 and 160 Hz that were in bother L/R and Sub speakers. Avoid this.Tried the sig gen on a Nakamichi receiver and Klipsch speakers and crystal clear, so it's not the sig gen.The only real positive is the BT connected easily.It has some nice features and looks OK, it's a tidy little piece but the performance just doesn't execute.I wouldn't use this as a garage source, the distortion would create headaches after a few minutes.JUNK.Talked to an engineer friend who informed me, ALL of these cheap amps are class D and will amplify any noise given to them including from a switching power supply which all of these are.I just happened to have an analog 20 Amp power supply laying around and powered this thing with it, guess what? ALL the noise disappeared!SO, if you happen to have an analog 5 amp 14V supply laying around, have at it!

The power cord is very cheaply built, does not have enough power, and is very light and not very usefulunable to perform and play streaming songs efficiently.Weak Amp!..the amp has blown out no power ?..

This little beast of an amp is currently driving a thirty year-old set of high efficiency, KLH three way 8 ohm outdoor speakers, and the subwoofer from an older 5650 Dell 5.1 sound system that I had previously converted to a passive sub after its electronics fried, and for very little coin I now have a terrific computer sound system! The only con is the amp's glaringly bright red light indicating power "On", but I found a small piece of black electrician's tape will effectively lessen that distraction.

I had zero exspectations when I opened the box. What i will say is the bluetooth is Very stable even at 50ish feet out of line of site away. I hooked up the left and right mains to a pair vintage 100% perfect Technics SB-40's from the early 80's (my first pair of speakers) and was surprisingly impressed. The high freqs were better with the RCA cables from my samsung fold 5 but that is typical. I was not looking for super loud as I will be using this outside to listen to music when doing yard work. I also was undissapointed with the bass and treble controls for full range, but those speakers came loaded with 10's, fours and 1.5 inch tweets. That is how they did it back then. ( the right way).With regards to power, my guess as an audiophile with about $100k of gear is 3 watts per channel RMS; I was fine with it for my application.I became unimpressed when I hooked up a dual 12 passive subwoffer. I tried the dual subs at 8 ohms as well as 2 ohms and even one sub at 4 ohms. All impenence configurations dissappointed. I even conected the dual 12's at 8 ohms to the main output and was impressed. The sub control is not slaved to the volume which is NOT GOOD. Also there was minimal resolution in the sub conrol. I find it better for just full range. If a sub is desired I would recomend converting it to line level rca or keeping the speaker level in on a budget sub and going that rought as it will also give phase, gain and low-pass cross over ability and just use the sub outs for a make shift preamp or better yet parallel the left and right main outs and the volume control will control both volumes. If money is the issue that would work. recall the bluetooth was stable. I must say folks it is most likely a class d amp which is not the most desired for full range but is efficiant. (but it did not sound bad but remember it was through paper cones which have a smoother response curve). For reference, one of my other set-ups is a vintage early 70's Mcintosh seperates) Note on the input power you have a nominal 12 volts dc at 3 amps max. You can not get more out than you put in. If i was the devoloper I would forgo the powered sub out for for a small signal out and let people fend for their own sub but provide minimal dsp for the sub output or at a minimum tie its gain to the mains for smooth balance of freqsRespectfully...

This amplifier is the ultimate choice. Undoubtedly the best value for your money. It also boasts a remarkably user-friendly Bluetooth capability, and pairing it is a breeze. What I love most about it is its immense power packed into a compact size, unlike other amps with comparable strength. That's what makes it truly exceptional. Compact yet explosive.