iamdub
Full Access Member
Shawn set you straight- the extra terminals are for wiring convenience. Just view the amp as having one positive and one negative, but if you're ever running multiple subs with multiple VCs, you can utilize the extra terminals to make your speaker wiring more organized.
Yes, air space/enclosure design plays a huge role in how a speaker sounds. A few months back, I put a 7" driver in a ported box designed just for that sub's characteristics- it's resonant/tuning frequency and volume of air it moved being the key considerations. The net volume of the box and dimensions of the port were sized accordingly. That little sub is in my work van and is mostly kept turned way down because it easily overpowers everything else. On certain bass notes, it'll make the radar detector on the windshield vibrate. It's all about efficiency and the enclosure is what determines this. Those L7s are great for ported enclosures, as many better subs are. But not just any generic enclosure with a randomly-sized port in it. A properly-built ported enclosure can give you more output with less power, often sounding nearly twice as loud as compared to a sealed enclosure.
Yes, air space/enclosure design plays a huge role in how a speaker sounds. A few months back, I put a 7" driver in a ported box designed just for that sub's characteristics- it's resonant/tuning frequency and volume of air it moved being the key considerations. The net volume of the box and dimensions of the port were sized accordingly. That little sub is in my work van and is mostly kept turned way down because it easily overpowers everything else. On certain bass notes, it'll make the radar detector on the windshield vibrate. It's all about efficiency and the enclosure is what determines this. Those L7s are great for ported enclosures, as many better subs are. But not just any generic enclosure with a randomly-sized port in it. A properly-built ported enclosure can give you more output with less power, often sounding nearly twice as loud as compared to a sealed enclosure.