Hi Lewinskih01, for a top tweeter amp you want extension and Class A. I would look at some of Nelson Pass Aleph's or a small class a kit, if your up to doing a chassis and power supply this maybe nice.
http://www.ebay.com.au/itm/KSA50-CLASS-A-AMPLIFIER-BOARD-ASSEMBLED-MONO-/111194258218?pt=LH_DefaultDomain_15&hash=item19e3b1bb2a
Cheers George