The speakers sold by the speakermen are of exceptionally poor quality, typically obtained for less than $50 from a local distributor. The speakers themselves have been reported as potentially damaging to any amplifier they are connected to. The risk of damage stems from an impedence curve that in some cases may drop below 2 ohms, which may overheat, short out, or permanently damage an amplifier not designed to handle such loads. Do a search for ” white van speakers ” you’ll see how this scam goes. Guy in suv or van... read full review »