Before - We liked our old setup and the MTX 4500-series subs sounded good, but there's always room for improvement, right?
Bass is like free money. Everyone loves it and if you don't, you're probably too old. Our Project Sinatra F-150 was booming thanks to three 10-inch MTX 4500 series subwoofers in a sealed box built by Audio Toyz in Las Flores, California. The bass sounded great, but like all things, we couldn't leave well enough alone and wanted more. Due to the tight confines behind our rear seat, we opted to keep the well-built fiberglassed box and instead, try out some of MTX's newest subwoofers. Our application didn't require the ultra-thin shallow mount subs, but the new MTX Thunder Round subs would fit the ticket nicely. To get the slightly deeper subs -less than 1/4-inch- to clear the back cab wall, we contacted Audio Toyz once again to build us a wooden spacer. It may not sound exciting, but we took the wooden piece and had our friends at South County Customs, in Lake Forest, California, smooth and paint the piece to match. It really made a huge difference in the look of our sub box.
After - One call to Crutchfield and $300 later, we had a sweet new sub setup and improved bass performance.
Sound is really what new speakers are all about and our new bass providers didn't disappoint. The new MTX Thunder Round 10-inch subs have an 18-ounce larger coil with a lower tuning frequency. What this means to you is, the bass hits harder and the lower notes are lower and stronger. A more appealing design element also helps with our project truck's looks. We ordered our new subs from Crutchfield. With a huge in-house inventory, the peace of mind knowing they are an authorized dealer, and the great customer service, it was a no-brainer giving them a call. In three days our subs were delivered and our bass fix was met. Check out how easy it was to make our truck boom for under three bills.
We began the install by simply removing the old MTX 10-inch subs with a cordless drill. | 
Fresh out of the box from Crutchfield.com, our MTX Thunder Round 10-inch subs looked great and for under $300, are a real bargain. |
Looking at the sub's magnets, the new Thunder Round sub has a much larger magnet, but is less than a 1/4-inch deeper. | 
We were also big fans of the new Thunder Round's appearance. Stlye and performance is a great combo. |
To keep our MTX Thunder Elite 5601 amp wiring the same, we used a 12-guage wire to connect one side of the dual 4-ohm connectors. This way our amp would push the subs in parallel and we'd enjoy optimum performance. | 
Each sub was connected using the existing wiring. |