Hi Tash has decided she would like some bass in the car as well as upgrading the standard speakers,has anyone fitted an underseat subwoofer I’ve been looking at either alpine or kenwood connected to the standard stereo as she wants to keep that for definite is this possible please many thanks Paul n Tash

Hi I’m guessing by no response this hasn’t been done,I’ve googled it and it appears that it is possible with a speaker cable to rca converter so I will look further in to that idea and let you know the outcome  Paul n Tash 

I was told that if you ran a wire off of one of the speakers (i was going to take from the rear)  and then put that into amplifier/woofer. then adjust LPF accordingly

This is pretty simple. If you have no rear speakers you can use the rear output of the stereo. Just wire the rca converter directly into the quad lock connector and the stereo will detect the rear output being used and allow you to adjust fade and balance etc. You can get an iso harness Cheap and use the pins out of it to connect into the existing plug, then just attach your converter to this. Then just run the rca cables to under the seat. 

Hi thank you both very much for that info,I’m going to look in to it and also decide on which underseat subwoofer to go for,cheers Paul n Tash 

Hi I’m holding tight on the subwoofer for now the car is booked in to a local car audio specialist next Saturday to have the doors fully Dynamated on both the inner skin and outer skin and a pair of upgraded Alpine speakers and go from there, I will report the results once fitted, Paul n Tash 

Hi I’ve just got back from picking Tashas Citigo up from Oxford Car Audio and what a transformation just upgrading the front speakers and having the doors fully Dynamat’d the speakers we went for are Alpine S-S65 coaxial,the old speakers were on the back seat and they are really poor quality,very pleased with the upgrade I would definitely recommend it,Paul n Tash