If you need help with installing any equipment, even if you didn't buy from me, I'm a Certified Installer. I'm cheaper than all the shops in the area. See below for details. Bazooka's TA850C 8" amplified Bass Tube lets you add ride-filling bass to your system with a minimum of hassle. It's an ideal solution if you drive a leased vehicle, and want the thrill of powerful bass without making any permanent modifications. The cylindrical design of the enclosure brings out the full sound of your music's low end and eliminates standing waves which can cause distortion. KEEP READING Product highlights: 8" woofer in ported enclosure built-in amplifier (50 watts max power) mounting hardware included line- and speaker-level inputs frequency response: 39-250 Hz subsonic filter (12 dB/octave at 35 Hz) sensitivity: 105 dB dimensions: 8-9/16"W x 10-1/16"H x 18-5/8"D Here are the details of the car audio installation items I can do: Head unit, amplifiers, door speakers, subwoofer designs and builds. Extreme power equipment like alternators, batteries, capacitors, and wiring. I can add just about anything, like subs and amps,to modern vehicle factory units which is difficult to do these days. I can Professionally tune any system. I have all the software and equipment along with a demo vehicle to show you what I can do. You can come and check out. Just reply to any of my products and message any installation questions you have. I'll be happy to give you a quote. Thanks.