AudioControl LC2i PRO 2-Channel Active Line Output Converter with AccuBASS for Adding Subwoofers, Amplifiers to Factory Car Audio Receiver Head Unit, Includes ACR-1 Dash Remote Bass Knob Controller

I used this on a BMW M5 with the stock sound system and was very impressed. Installation was straightforward and easy to complete. It made a noticeable difference in correcting the frequency curve and really improved the overall sound quality. Highly recommend for anyone looking to upgrade their factory system without a complicated install.

50,000 mile review. It's perfect. Does exactly what it's supposed to do. Works well with 16v input even though it's not advertised to. Compatible with any vehicle including my 2023 Tesla model 3 performance. Very durable. Sound quality is not an issue. Expensive for the money but you know you are getting a great product.

Made connecting to factory radio a breeze. Installed in my 2017 Tesla Model S and absolutely love the output. Definitely recommend to anyone looking for n easy install.

I have had issues with my sound system for months. After installing this in my 2024 Volvo S60, my system works every time I turn it on!

If you're like me and have a newer vehicle with lots of factory options that run through the head unit, going aftermarket can be a huge pain in the rear. This active LOC has crystal clear sound output without all the engine noise and muddy sound processing from a budget aftermarket setup. Works even better if your car has a factory amplifier with a low frequency output. It's also fairly easy to install whether you have very little experience, or many years of car audio under your belt. There are also some very easy to follow youtube guides that explain all of the features and how to easily set them.

4 stars just cause I didn’t get the pick

Worth every pennies.

works great for factory radios had a speaker rack installed and ordered this for my factory radio