Skytronic 8 "/ 20cm mounting Hifi Woofer Bass speakers

Three days after my order, I was already in possession of 2 ordered "Skytronic 8" / 20cm mounting Hifi Woofer Bass "I bought them as a substitute for 2-quality Visaton loudspeaker that time ca '200, -. DM cost the piece. After receipt of the delivery, I built the replacement speaker immediately in the present case.
Dimensions and technical description were identical to be replaced with. The magnetic thickness was slightly lower. The Polkernentlüftung exists. Even the membrane is made of a similar material. What is better is the rubber surround, which was manufactured at the Visatonlautsprechern only from a plastic material and which was also the reason for the failure.
Actually, I wanted no reviews to write because I find it annoying to express an opinion about every little thing. But in this case I have to tell when all of my expectations were exceeded.
The price-performance ratio is very good. Even with the result of the play after the installation I was very pleased. Even my wife was impressed and that may mean what !!!