any suggestions as to a sub 4ohm under or equal to 400 watts rms @4 ohm? even 1000 or so. that would sound good in a bandpass box already have a 400 watt rms amp and the box
Adire Shiva Alpine Type R Kicker Comp VR Resonant Engineering SX
those all have your power requirements and impedance requested, however I don't personally feel that any sub sounds good in a bandpass box, and if this is for one of those prefab boxes with the plexi window like they sell at best buy, none of these subs will work very well because they are all high output subs, and would pretty much implode one of those cheapy "bandpass" enclosures.