if you want all out loud 4.5 tuned to 38 with 50in^2 of port area and a 2500d would work nicely..
id say the DAT 2500 does about 2600 @ 13 volts, great amp, good price..
dont let the woofers fool you there bad ***. i like them tuned to 35 better though its abit more musical.. for a SQ install 4 tuned to 30 with 40IN^2 of port area.. they can't handle 1300, but they handle 800 per and sound great..