Evening all after owning my 230 for a few months I want to upgrade my sound system. I have a Kenwood 2400w D class amp and a kicker 10" square sub whats the best way forward? Many thanks. 

 

Assuming you dont want to replace the headunit you will need to choose a way to get a audio signal to the amp (RCA)

There are a number of choices and as always price varies wildly. You can start with the cheap option which is a line converter. For these you need to splice into your rear speaker cables then run RCA cables from where ever you leave the converter to the boot and the amp.

Its the cheap option but by no means an ideal solution.

 

You can also use Processors, also known as DSP's. These have much more control than the cheaper line converters meaning your amp doesnt end up with all the frequencies and just the ones it actually wants. 

 

There are many retailers who can help out on specific models but i'd recomend visiting www.audioboffins.com. The owner is very knowledgable of his stock and has done a huge list of oem intigration builds so should be able to help no matter the budget.

Many thanks for your help with this I'll have a look at their website as soon as I can cheers