I have a pair of 12" Infinity Competition Subwoofers, in a custom ported Bassworx box, with an MTX Audio 6001 amplifier attached to the side. This is a full set, this is all you need to have the best sound system on the block. I've had this set for about a year and I absolutely love it. By far the best subs I have ever owned. The reason I am selling them is because I no longer have a vehicle that I can put them in as I sold my car. This system is easily worth over $800 but willing to get rid of it for $500 obo Call or text me 778-584-5003