the box 15LB075-UW4 Speaker 15"

I bought this speaker for a diy bass guitar cabinet even it's a subwoofer and not meant for bass guitar. I found it quite good sounding after a little equalization. I even tried it with Washburn WR150 guitar with Seymour Duncan SH-4 bridge pickup and original neck and middle pickups, and it wasn't very bad. There was enough of highs, even this isn't a full range speaker.

The cabinet I put it is about 93 l in volume, and inner dimensions are 60x60x26 cm. I tuned it to about 30 Hz.