I really don't see how a person can do much better than this amp for the money. Classical guitar sounds great, bluegrass comes through very clean and crisp, and also gives a great warm jazz sound (as in instant 1950s/1960s vintage sound with a decent hollow body jazz box).

I've played indoors and out, and also hooked up a singer to the other channel for vocals, and I'm still extremely satisfied with how well everything sounds. The Bugera speakers may be the best I've ever heard for acoustic music.

If I had a complaint, it would be that there are too many options. I don't know why anyone would want a bunch of effects on acoustic music and--even if they did--why they wouldn't use separate effect pedals or a board. But, they are there if you want to play with them.

I've played through a number of amps that cost much, much more and still wouldn't use anything else for acoustic music in small venues. Very highly recommended.

Initially I was thinking about getting the ACX450 but it doesn't have the output to connect to the sound board. I used to plug into the main sound board in my church, then say a prayer hoping the sound guy will make it right. But recent experience with arrogant sound guys made me think of getting an amp that I can plug my mic and guitar in, then run a single XLR line to the sound board. This way, I have better control over my taste.

I finally got a chance to use the ACX900 at my church. As planned, I plugged my own mic and guitar into the amp then ran an XLR line to the soundboard. After some adjustments, the sound came out fine and it was able to feed a gymnastic with the addition of the main sound system. The ACX900 filled the gaps where the sound level was weakest (we have a wide room and the center is always acoustically weak). But this is not one of the best sounding acoustic amp out there. I have used a Fender acoustic amp (the AC30) and feel the sound quality (in terms of fidelity) is not as good as the Fender. But I may be picky here cause I do listen to high fidelity home stereos systems a lot.

The effects on the ACX900 is ok but not on par to the Fender AC30. On the Fender, I always turn on the chorus for the mic channel and hall effect for the guitar. I did the same for the ACX900 today and I have to say I like the Fender's effect better.

I believe the final stage (power amp) is the weakest link. I connected the output from ACX900 to my home high fidelity system. I like the sound coming from the speaker of the home system a lot better.

Overall, I think the amp is solid but sound quality wise is not up to the Fender AC30 standard. However, this amp is a lot cheaper then the Fender and claims to put out 90 Watts so I think the money is worth.

I "test drove" one of these today and I was not impressed. The sound was very tinny, in spite of the fact that the on-board EQ on my guitar was set to boost the lo end and cut the hi end. The EQ on the amp had little to no effect on the output. In addition, the overall output seems very low. I compared this to a Marshall AS50D at the same time and the Marshall had much higher output--in spite of a lower wattage rating--the Marshall obviously has more efficient speakers. You get what you pay for and for me the better value was paying more for the Marshall.

I am very fond of Behringer based on the value for the price. I got this baby and put it through the full workout. It is markedly better for live performance or recording than what I had been doing. The effect are somewhat limiting, but overall it's a great amp!

I tried one in the music store and it sounded great. I was initially worried about the volume; I play regulary in a little sports bar where we hold an open mic once a month. We had been playing through a little 100 watt Kustom PA which was not cuting it for the guitar. Worst sounding room ever, so I decided if it would work there, it would work anywhere. I put it on a high table at about eye level and it cut through great, volume on about 6, with a mic in the other channel too. Couldn't believe it, I really thought I would need the 1800. No problems here. I play fingerstyle with a Martin 000x1 and a K&K Western pickup, no preamp.

The cover is very prone to scratches, it already has a gash in the top. Be careful when loading and unloading.

VERY low noise. The feedback button thing is kind of a gimmick- it's pretty easy to tell which frequencies need to be adjusted.

I don't use the effects much, a little slapback delay and that's it- I don't want to add reverb, etc, in an already muddy sounding room. But they work well.

I tried the Fishman Loubox 100, and for the price difference I don't hear an appreciable difference for my needs. A great value.