100W Hi-Fi Stereo Amplifier MP3 Player for Car/Motorcycle - Black + Silver (SD/USB)

Pros: This is a really nice unit and pretty easy to setup.
MP3 playback is very sweet either from SD card or USB drive.
I powered this by connecting it to an old computer power supply and it works great.
The reomote does everything you could wish for with this device.

Cons: I had a few problems, nothing major.
First I was using a 12v 10A power-supply used to power halogens lights, it was too grunty and that caused the system to make loud pooping/brups every so often. Using an old computer power supply unit fixed that.
Second was the remote, it's not very strong and when mine arrive it's backing was cracked and needed a little glue. It was an easy fix and still works fine.
Third was the USB drive, the drive name has to contain no space characters and be in FAT/FAT16 format to work. Not a big problem if you know about it.
Fourth was I had to find a power plug to go with the power socket on the Amp, kind of wish one was provided or it had a simple system of connecting the power.

Other: I like the unit, I use it in my studio to play MP3's and it does the job really well. It's not super loud and I don't think it would rattle the windows of a car or worry other road users if it was fitted to a bike, but it would to an ok job really.
But for less than $20 this amp is pretty awesome.

Pros: Very nice look, good combination of aluminum black case, front and back plate are silver. Sound quality is also excellent mainly from CD and DVD player, but from USB MP3 files have small noise between tracks.
For better performance from CD or DVD via RCA plugs I suggest changing the resistors on input path for both left and right channel. For signals put 1kOhm resistors other two between signal and ground put 220kOhm. Volume quantity become much more.

Cons: Bottom 3 red LEDs are too bright so if you can put diffused yellow and one red type.
No user manual.

Other: I use it with two-way speaker system about 60W and 8 ohms impedance. For power supply 12V 2A is suitable.

Pros: This unit is very cheap, and works well. I have tested it with a 3Amp DC adapter and 2 speakers from my current sound system, and it worked well. But I'm not a HI-FI freak.

Cons: Build quality. 5A DC adapter is hard to find. Doesn't explain if we can use adapters with smaller amperage. The pendrive gets in the way of the IR (remote control) receiver.

Other: Good for the price, but remember, you'll need 2 speakers and a DC adapter (3 - 5 amperes) if you're going to assemble it in you house.

Pros: I have bought three pieces and all works okay. The price it is very good. The quality of the box is ok. The power is fine without very much noise.

Cons: The VU meter led lights LEDs are too bright you can use some leds which make the light diffuse. Other cons is the connector for power supply, you can give it with the stereo amplifier MP3 player or to put a power cord.

Other: Generally, it's a perfect device with good power for in-car use, user-friendly interface and cheap price.

Pros: Good performance/price ratio. Reasonable sound quality for a cheap product. Easy setup. Audio input for external signal.

Cons: Misleading name - the unit is not 100W at all. But about 10W is sufficient for me anyway. Not all formats of USB drives are supported. The internals have poor manufacturing quality.

Other: My unit came with one audio channel non-functional. It was easy to repair it but it took time and some soldering was necessary.

Pros: Small. Cheap! Reads USB and SD/MMC cards. (But with trebled noises) Easy to use. Powerfull? No but it satisfies me.

Cons: Really, the power led is so bright. I replaced it with a yellow led. Sometimes, some bass bumps coming if I increase the sound and the bass together to high values. Maybe, this is happening because of the power supply that I use, I'm not sure. (Using 4 ohms 35W x 2 woofers and 2 x classic small tweeters that are sold unexpensively for car audio.) While listening from flashdisk or MMC/SD card, a treble hisss voice as a noise comes. It disturbs.

Other: Recommended but read the cons first.

Pros: Unexpectedly high sound quality for such a cheap amplifier, especially for classical and jazz.

Cons: SD card slot seems to narrow to allow entering SD card. Only 2x20W output power rather than the stated 100W.

Other: Definitely worth the price.

Pros: It is simple, small, and useful for a variety of inputs.

Cons: Like most audio amplifiers, it is wildly over-rated. The remote control can only be used up to perhaps 3 meters (10 feet). Volume changes drastically if you change input modes (USB to Line In, for example).

Other: Frankly, it is "good enough" for many applications. I have used this and similar amplifiers for my garage and as a stereo in my living room.

Pros: Very small and simple to use, has all the basic functionality I need (Volume, bass, treble). The sound quality is decent, and there is no interference which would bother me.

Cons: 1. The power indicator led is extremely bright, and I decided to open the case and add a resistor to dim it down. 2. When powering on the amplifier, I hear a pretty loud but short cracking noise.

Other: Definitely inexpensive, has a couple of minor flaws.

Pros: Good build quality. Good packaging. Awesome sound quality (great bass). Can handle my two 6ohm - 20w Philips Speakers. The RCA input works great. I power it up with 9v rc car charger. Remote control is good only for vehicles. Unit doesn't heat up.

Cons: No manual. Remote control not very useful for home users. Led's are good so you know if it is on or off but they are a little bit annoying in the dark.

Other: Buy this amplifier if you want to use it in your home cinema, it can handle up to 40w pretty well. I have it working 7 hours/day for 3 days and it is working perfectly.