[3.5 in] This small amp packs more tone and clarity than you would think possible. Bob Sima uses these with acoustic guitars and headset mics and they sound great. I used mine today for a small acoustic gig. GREAT for small rooms where you just need a little boost because playing unamplified just doesn't quite cut it. The ONLY thing I wish they had done differently would have been to have a mid control on the vocal channel. Instrument channel has low, mid, and high. Vocal channel just has low and high. I agree with some other reviews that I've seen that the LoudBox Mini sounds better than some of the larger models. They got something right with this one.

[24.69 oz] Replaced 2 defective speakers

[3.5 in] I have had an older Cetacea wireless microphone system for over 10 years and the transmitter unit finally was failing. Bought this new system and it is a joy to use. The pendant microphone is so light that it is not noticed at all and it must have very good electronics as the sound levels do not change while moving around. The sound quality through my old Cetacea speaker is also much better. Seems the frequency response and overall sound quality is greater. Worth the price! Cetacea systems are the only one for me. I use the system in School Cafeteria for presentations and the sound reaches the back evenly and clearly. These are big rooms that suck up sound as they are not designed for it. Very happy with it.

[Integrated] I bought the HX-3 this week and after using it for a couple of days hooked up with my Sony MZ-M200 Hi-MD recorder, I can say it is wonderful. I am using Pioneer SE-MJ71 headphones with them. I love how my uncompressed PCM recordings of my cds' sound. I prefer it to my portable cd player. This amp is built like a tank. One of the main reasons I bought it. Also I bought it to support small companies like Sound Devices that create superb equipment. I am not an audio professional, just a lover, but bought these to carry on my daily commute. I do not own an iPod. To me sound is very important. This amp does what I want. It doesn't change the original sound, it just amplifies it. The bass sound better and so does the treble. These things are powerful, I usually put the volume level to the second or third marker, or about 8 or 9 o'clock. There is no need for more unless I want to permanently damaging my ears, which will end my musical enjoyment. So be careful. I love the peak light warning, though if I reach that I will blow my ear drums. It is a good size for a portable amp. If it was any smaller, how can there be any room inside for the parts to breathe. I was going to wait till after new years to buy it, but couldn't wait. I tested it in store and waited a week till I finally ordered. The sound was that good that I needed it NOW. There are headphone amps that are better (there always are), but are you willing to pay over a $1,000 and have it be not portable? I am happy and content with the Sound Device HX-3. And so will you whether a professional, or just a music lover. Take care and enjoy.

[Integrated] I bought the HX-3 this week and after using it for a couple of days hooked up with my Sony MZ-M200 Hi-MD recorder, I can say it is wonderful. I am using Pioneer SE-MJ71 headphones with them. I love how my uncompressed PCM recordings of my cds' sound. I prefer it to my portable cd player. This amp is built like a tank. One of the main reasons I bought it. Also I bought it to support small companies like Sound Devices that create superb equipment. I am not an audio professional, just a lover, but bought these to carry on my daily commute. I do not own an iPod. To me sound is very important. This amp does what I want. It doesn't change the original sound, it just amplifies it. The bass sound better and so does the treble. These things are powerful, I usually put the volume level to the second or third marker, or about 8 or 9 o'clock. There is no need for more unless I want to permanently damaging my ears, which will end my musical enjoyment. So be careful. I love the peak light warning, though if I reach that I will blow my ear drums. It is a good size for a portable amp. If it was any smaller, how can there be any room inside for the parts to breathe. I was going to wait till after new years to buy it, but couldn't wait. I tested it in store and waited a week till I finally ordered. The sound was that good that I needed it NOW. There are headphone amps that are better (there always are), but are you willing to pay over a $1,000 and have it be not portable? I am happy and content with the Sound Device HX-3. And so will you whether a professional, or just a music lover. Take care and enjoy.

[Horn] Hey folks! I Paired this Bogen C60 amp up with a PM660U microphone and two TOA SC-615T paging Horns and this small little system screamed. Level was set at about 5.5 and was used outside for an event. Customer was impressed and I was as well. I would highly recommend this item! [ St Thomas, Pa ] FCL

[Yes] I work in audio post-production at a facility in NYC, and I just recently purchased a pair of AKG open headphones for doing pre-mix work outside of my studio. Of course with them being 60-something ohms of resistance, I knew I was going to need an amp to keep them happy, and to keep me happy. Almost all of our recording equipment for field recording is from sound devices; I love this company. The build, quality, and durability of their equipment is always at the top of the line. Same thing goes for this headphone amp. I never plan to use this thing outdoors, but I actually only power it with batteries because the power supply is an additional purchase. (However they do come with the DC terminal into their box if you want to do a little work yourself and wire up a DC converter) Very linear response, virtually no noise floor unless I jack the level up above 80% (which I never need to do anyway), and the best part is it really lets my headphones shine. If you require headphones and plan to do serious mix work PLEASE do not expect to get good results coming straight out of the laptop's 1/8 output; not only will it not be loud enough in most cases, but there is just not enough power to allow a high resistance pair of headphones to be at their best.

[Yes] I work in audio post-production at a facility in NYC, and I just recently purchased a pair of AKG open headphones for doing pre-mix work outside of my studio. Of course with them being 60-something ohms of resistance, I knew I was going to need an amp to keep them happy, and to keep me happy. Almost all of our recording equipment for field recording is from sound devices; I love this company. The build, quality, and durability of their equipment is always at the top of the line. Same thing goes for this headphone amp. I never plan to use this thing outdoors, but I actually only power it with batteries because the power supply is an additional purchase. (However they do come with the DC terminal into their box if you want to do a little work yourself and wire up a DC converter) Very linear response, virtually no noise floor unless I jack the level up above 80% (which I never need to do anyway), and the best part is it really lets my headphones shine. If you require headphones and plan to do serious mix work PLEASE do not expect to get good results coming straight out of the laptop's 1/8 output; not only will it not be loud enough in most cases, but there is just not enough power to allow a high resistance pair of headphones to be at their best.

[24.69 oz] A small, light, quiet, transparent amplifier with 4 channels (2 stereo pair for me) to solve a problem in my home studio. I drive a pair of Yamaha NS-10M and a pair of UREI 809s (yeah, old school) and use the volume controls to switch between them when monitoring my work. Plenty of power for my control room (remember, it's a home installation).
A little pricey but I trust QSC and they delivered. They worked as advertised, the documentation was great, no problems.
I did consider ditching the speakers and getting a pair of powered monitors, but I am used to listening to these and they haven't let me down yet.

[Yes] I use an exact duplicate of this unit (since B&H is prohibited to ship it to the Philippines) which I purchased in Hong Kong. In fairness to B&H, I will not mention the brand nor the purchase price. This unit is superb and I have tried more expensive headphone amps. Combined with the Apple IPOD Dock (with remote), you can kiss your full-size system and speakers good-bye. With the volume turned only to less than 1/4, you can drive high Ohm units such as the Senheisser HD800 unit or similar reference grade units, with ease. This amplifier is built like a tank and was designed to take abuse and rough handling because of the investment-cast metal housing and moreover, it will give you hours of distortion-free qualitative listening. It can take a plug-in 5 to 15 volt adapter or two AA size batteries, but I do recommend getting the lithium types to surpass the specified 8 hours of listening. If you buy one you will not regret it. It will surely last you for years!