Don't be discouraged by the cost per watt with this amp. It truly is worth every penny. Rated at 600 watts this amp puts out more clean power than too many other amps on the market rated at 2-3 times the output. This amp is very efficient meaning a smaller drain on your electrical system. It is also extremely small and the controls and filters are great. In regards to price for performance, this amp is hard to beat.

Extremely underated, puts out amazing power for such a small price and small package. Way more power than needed. Also easy to adjust, great style, stays cool, and smooth power all around. Thanks Sonic for recommending!

do not be fooled by the size of this amp it has blow my rockford fosgate p3 15 easily

This product is great for discrete, quality installations. Having used this product for 6 months I havent had it present and problems to me. If you're considering this versus the alpine equivalent I would recommend saving your money and purchasing the JL.

This amp is ideal for intalations whereby space is an issue or can not be compromised. With this amp I replaced an old alpine Amp that was also in the class of small powerful amps. I made a switch and noticed and inmense difference. It was so intense, that I had to dynamat the car panels. I was powering a JL w3 12" on a sealed enclosure and the sound was incredible. The bass was clean and deep- for its size unparalleled. This lasted about 8 months. Unfortunately, the speaker was blown. However, the speaker lasted about 8 years under the old amp that had speaker protection. I then purchased another speaker. I tried an Alphasonic 400 series as a temporary fix. This speaker was also blown out in only 3 days. Apparently, there isn't any speaker protection built in to this device. Also of concern, is that the gain controls are not easily accessible. It is bellow a face plate on the top of the amp that is screwed in. I just dicovered this after consulting with a JL salesperson. Now, I'm in process of trying the RE Audio SEX 12 sub that is favorably reviewed by Sonic consumers. Wish me luck. I guess with proper gain control and the right combination of speakers it is a good little amp. I recommend it, with the exterior device sold separately to control it's volume.

Very good unit in my opinion. I'm not a SPL guy, so I'm not sure what "cold" means. I previously owned a RF Power T500-1bd. It was a good sounding unit, but this amp sounds just as good in my opinion. Plus, JL Audio includes detents on all their adjustments, which surpasses any RF amp I've ever used as far as tunablity goes. Long story short, both amps are good, but if I where to recommend one over the other, I'd take this one. They cost about the same.

I definitely would recommend the xd600/1! It may be a little pricey but it powers my two 10 inch subs with ease. Its small footprint also helps to make installation in any location a breeze.

If you are in a SPL competition this amp is great. If you are looking for good sound quality do not buy. This amp sounds cold very similar to the Alpine pdx.

Just finished installing this in my car. This amplifier is so TINY but yet so powerful! My JL W6v2-D4 never sounded so good! Sonic Electronix delivered fast!