mastershake575
10+ year member
CarAudio.com Veteran
Yeah brands like SSA, DD, American Bass, Sundown aren't bad but there's a difference between SPL subs that "can" sound okay VS subs that are actually geared towards SQ/Music.Ok I got you on the subs thing. So can you name a couple that have that sound of the old Rockford power series back when they were the Pulp cones before they went into the plastic stuff they use today.
If you want subs that are actually engineerred to be accurate/tight, flat response, low distortion, and easily blend with your front stage then i'd be looking at stuff like Adire Audio Brahma/Tumult, Stereo Integrity SQL, IDmax. If you wanted something with amazing SQ but can actually move some air on lower power then incriminator flatlyne is a damn good sub (one of my all time favorites).
You literally have the biggest advantage for output which is box size (dual 15s is a ton of cone space for a car). As a result you don't have to chase output via buying subs that have ultra big magnets or are peaky.