Ordered on ebay me the parts. But no matter, the sound quality is not convincing. Now you have to know that Piezohoch- and midrange do NOT provide hi-quality in general. But here but already distorted so much that it is simply no longer sounds good. For a party in the basement, where they are needed 3-4-5 times a year, they can be possibly if you do not go to the limits. Then it takes nevertheless a halfway usable amplifier to which is not to get under 120.- Euro. We then talk of about 260.- Euro in total. If one only 140.- Euro it, you get a far better III PA system with the MARLIS MK. One subwoofer creates a better bass together as the 4 parts. And also in the highs and mids can thus correct throttle without a turn around the ears. Because it is an active system, not have to worry about an amplifier also.