Mini Small Stereo Audio preamplifier, Headphone Amplifier, Gain 20dB Phono Turntable Phonograph preamp, Dual op amp NE5532 with RCA 3.5mm Input to RCA 3.5mm Output

After testing new product: AtNeDcVhcan confirm that it is built with very good quality.No hum, no noise, all connections: inputs and outputs worked as expected.Lots of functions, several options for inputs and outputs -well thought, well designed. Simple. Volume knob is small,useful, do not throwing to eyes, yet can be used without a problem.Volume even on 10 o'clock is giving adequate volume,again without any hum, noise and issues.Device is not slowing down pace of tracks, seems not changingspeed of a playing track. It's not of course super expensive device,that exaggerating sound, and to my opinion is focusing on midrangegiving pretty full sound range. Can produce trembles well, trianglesand cymbals were pretty good, not as airy and copper like as withgood tubes, but still very-very good. Bass and mid-bass were withoutany booming and presented all range very good.Black, silence was clear, good imaging and ending air was presentable.I tried it as a headphone amp, as preamp before and right after a turntable,in receiver in mid of tape monitor loop, boosting a tv and external speaker systemto passive speakers with low sensitivity to a desirable level.Overall - very good and inexpensive product, which can be used on many occasions.On almost all situations volume at about 10-10:30 o'clock was good enoughwithout changing much of the sound.To manufacturer I can advise a couple options:- Power supply cord is really-really short. I'd say too short to standard use.- Reduce the logo on top of the body by making it really smalleither on a side or on a front panel:there is no need-to-know exact model and it is bothering too muchand aesthetically is not very good.- Hope, that designer team can play with other options, like:- adding tone controls (Bass, Tremble or even Mid);- along with tone controls adding an option to use 12ax7 tube.(or even replaceable tube inputs/holders to use various types of tubes,but there shall be better testing to make it without any hum and noise,making such option much better and reliable, then Bellari phono preamp as example.)I'd love to see those options, especially if price will be adequate.Again: AtNeDcVh Mini Small Stereo Audio preamplifier to me is very good and built well product.

I was not expecting much from it, but it is pretty good and well made. if you do not care about a small noises when powering on/off - it is quite a gem. Even headphone amp is crystal clear on SONY MDR-7508.PS, no wonder I liked the sound of it - NE5532 were the gold standard in professional audio for over 30 years and it is still produced after 35 years and very inexpensive.

I hate bending down and having to adjust a passive subwoofer volume. So, I got these (three in total). They work very well. However, be careful not to overdrive your subwoofer. There is a little noise (hiss) about 1/3 way up (too high for the sub anyways, so not a big deal).

Worked perfectly to boost up audio signal from a Media Player

I had my Mac connected directly to my Fosi V3 and it just wasn't loud enough, dammit. So I bought this tiny doo dad and holy crap, not only is it much louder but it's just as clear as it's supposed to be. I haven't tried it with a turntable yet since my amplifier has a pre-amp built in, but if I do I will add to this review.

I have a Yamaha MX88 synth that I play almost exclusively through headphones. I've always felt the maximum headphone volume, regardless of settings/tweaks, is not quite where I want it. I'm careful about my ears and I'm not looking to blast myself with volume. We have an acoustic piano in the house and I guess I'm looking for a similar sensation.I like the audio quality of the Yamaha's headphone output very much but Y-cabling the stereo line outs to a small amp and using its headphone jack colored the sound too much and was also too clunky for my small space. I wanted something small and this little preamp fits the bill. It's about 2 1/4" x 3 1/4" and simple - just a power button and volume control - and sits on top of the keyboard with enough mass in its metal case that I don't have to worry about the weight of the headphone wire moving it around.I use a short mini-male to mini-male cord with one end into a 1/4" (guitar plug) adaptor and the other into the Yamaha's headphone out. The other mini-male goes into the back mini jack of the preamp and my headphones (50 Ohms) go into the front mini jack. The preamp comes with a power supply that I add to the same power strip as the keyboard, so there no extra effort turning things on and off.There are no numbers on the preamp volume knob but setting it to about 11 o'clock gives me more boost than I would ever want with no detectable noise. It also lets me turn down and ride the synth's easier-to-reach master volume knob for plenty of headroom and fine tweaks while I'm playing.Exactly what I wanted - how often can you say that these days?

A preamp for a phonograph has low frequency boost, this preamp has a flat response. If you try to use it as a phono preamp the bass will sound weak.I'm using it to amplify the headphone output of a .mp3 player to the line level needed for a generic amplifier/receiver. The amp has a gain of 10, which is barely good enough for my needs.I reverse engineered the circuit and included the schematic for those who are into that sort of thing. It's a good, solid design. The construction looks reasonable too, I have no complaints.If I get inspired I may change out R7 from 10k to 33k to increase the gain of the preamp to 33. I'm not inspired at the moment.

Needed an amplifier for my projector setup, and thought I'd give this one a try after the reviews and comparing prices. Sadly, three months after use, it has stopped reliably working! The volume cuts in and out and when it's out there is a horrible high pitched tone that drives my family and animals nuts. Even worse, the return window closed... Cannot recommend this product with a good conscience; try a different one.