I wanted to improve the weak bass of the factory Bose system in my Nissan 370Z, but didn't want to take up any more of the limited trunk space with a regular sub box. There are a couple of really nice custom enclosures around, including one that fits in the middle of the spare tire, in place of the original Bose sub-woofer box. But they're all upwards of $600 and that's before you buy an amplifier for them.
So I discovered these compact "all in one" sub-woofer boxes and realized one of them would be just what I was looking for.
It looks like the Kicker Hideaway is the most often used and reviewed on on the market, but I knew JBL was a respected name in audio, and the BassPro SL sells for $50 less than the Kicker solution. So I gave this one a try. Even paid Best Buy for a professional installation.
When I got my car back after they installed it? The bass was still really weak. You could hear it was there, but it was hardly an improvement over the Bose sub-woofer. Over the next week, I tinkered with it here and there when I had free time, and realized any time I turned up either the bass level control or the "bass boost" control - the sub started making a rattling noise. Basically, there was no way to adjust it to an appropriate volume level without hearing the weird rattle with each bass hit.
Earlier today, I decided maybe it was because Best Buy wired it directly in to the speaker level outputs that went to the factory sub. So I bought a line level converter and re-wired it so it would use the RCA cables off the converter. Nope -- exact same problem!
I decided to do a return, or at least an exchange, but it's now been about 30 days since I purchased the JBL and without "Elite" status as a Reward Zone member, Best Buy says i only had 15 days to take this back! That really stinks, since their installer had to know something wasn't right with this sub, but installed it anyway, adjusting it to hide the flaw.
I bought a Kicker Hideaway just to test it out in place of the JBL, and guess what? It sounds great! Plenty of bass and no more weird rattling.