Customer Ratings & Reviews

Sounds Great

Just put in a pair of the JL Audio C2-400X into the dash of my 2000 Porsche Boxster S. and they sound great! I cut the old speakers out to make a mounting bracket. And that work. Overall Sonic Electronix was easy to order from and the speakers sound great.

JL C2 -400X

LOOK .I just bought these beauties. My god they rock!! At first I really underestimated them cause they are so light!! The sound is awesome, you can hear a crisp base!! Excellent buy, highly recommend it.

JL Speakers on 2011 Hayabusa

Just bought and installed JL speakers on my Hayabusa as a replacement for 4" Infinity reference and they out perform reference speaker by far. Using a 2 channel 300 Watt Rockford Fosgate amp to boost the sound and with a little tweeking of the amp they loud with crisp base. Excellent buy!!

Solid JL Audio C2-400x speakers!!

They have great sound and would definitely recommend them. Great speakers for the money!

Quality Item

After fitting a JL Audio amp & speakers to my Jaguar XKE I added the JL C2 400x to the front console area which is limited in space, the JL's perform beyond their size & price! Sonic Electronix dispatched quickly & efficiently, good service, would definitely use Sonic again

Dope speakers

Overall dope speakers, the sound quality, perferct mid-bass, easy installation (first time i ever installed speakers). Only problem i found was that these are 4" and i seen that i could fit 5.25" speakers for my rear doors.

By Filo on December 25, 2015 Verified purchase

Perfect

Definitely 100x better than the speakers i had in my car before. They have a better base and clear sound. Highly recommend.

By James on August 25, 2020 Verified purchase

good product

Really stops the rattling that comes from having the punch from the kiker speakers i have installed in the doors of my car.

Easy to use and apply

I used this product in my rear component speakers (Alpines) for the mid-range woofers in the doors to shield against vibration and they do a good job and the speakers sound great for it!

4" jl audio

Ok speakers way over priced. Find something cheaper name doesnt mean anything with these

By Randy on November 20, 2015 Verified purchase

Cache CSM

These came in a package deal from Sonic
with JBL GTO series speakers one of the decisions why I bought the GTO speakers, easy to use. Currently installing the sound system but having used similar products before these will make a good speaker sound better.

Great product

Worked good, stopped the rattling. Deeper bass.

good stuff!

I bought this in a combo package that Sonic put together with a set of hifonics components, the zxi65c. i liked it, i havent heard any rattling from my speakers. works well, i recommend it.

Sounds Great!

I installed the Dead Shield Sound Dampening Material under all 4 of the speakers I replaced in my truck and the stereo system sounds great, better than I expected.