I just bought a pair on this site by chance for 900 €. This material follows the series Little Max appreciated by many. The previous owner, a musician who has treated his material in said well, having himself signed for another sub brand but amplified version more convenient and simple. I tried models Peavey, Yorkville, Cerwin Vega, but heavier and more powerful versions, developing a very strong sound. I especially liked the power / volume of cases, excellent manufacturing quality. The woofer is built with neodymium material in comparison with Electrovoice on 15-inch versions and more. I like the qualities of dynamics, one has for his money, the price / quality ratio is really good and I sign the same if I find occasion. Nine as a lot of Dynacord products is relatively expensive and not accessible to the beginner. The current configuration is powered by the QSC GX5 probably below the potential of this material. Questions?, Who can enlighten me, some models come with a technical publication from Bosch Communication System as the sub 112 and the other as Sub 115 and 118 with technical information signed EVI Audio GmbH.