JBL CSS8008 Commercial Series 15-Watt 8' Ceiling Speaker White

Using transformer, then got humming noise. 8ohm works fine

I have years of experience with distributed/70V audio under my belt, and I've used all the major hitters in the industry: Atlas/Soundolier, Lowell, Quam, Bogen, and so forth. For $30, you get a grille and speaker package that sounds better (in some cases, drastically better) than any of the entry-level or industry-standard packages offered by the other brands. On the commonly accepted standard 1W tap (using the blue and black wires; black to common and blue to hot), this speaker delivers crisp highs and decent bass response that should be more than sufficient for any background music or paging application.As for the reviews that mention you don't get tile rails or a backcan with this speaker, I can only assume they're not all that familiar with 70V systems and don't realize these accessories are sold separately no matter whose grille/speaker package you buy—but you really should buy this one. You're not going to find anything better in this price range.If you want better bass response and a slightly less crispy/more balanced high end and you can spend a bit more per speaker, step up to the CSS8018. If budget is an issue, you'll be perfectly satisfied with the CSS8008.

These speakers are good quality and sounds really good

El sonido no es de la calidad esperada. Cumple, y hasta ahí. Tamaño perfecto, y diseño muy bueno.

Excelente producto, calidad y precio