I recently replaced the stock speakers from an MKX 2011 THX-II. After seeing the stock OEM speakers, I don't expect the quality of the amplifier to be much better.
At first I found the sound quite acceptable and well balanced with respectable sound stage, After the speaker upgrade new speakers were so much more efficient that the subwoofer was not longer detectable in fact the front speakers were now producing more bass than the 8" and I am now forced to swap out with a new sub.
The initial intent was to keep the factory amp.... I've now accepted the fact the only solution is the swap everthing out.
I will only keep the center and rear surround speakers hooked up to the factory amp.
LC2i for the new 9" mid bass sub, will use stock location with sound deadening material.
LC8I for the front and rear speakers.
Alpine PDX-5, small class D amp with good power management.
Speaker Size component 6.5.
I will agree the stock OEM amplifier is quite acceptable, but will need some help with the SUB. If one is going throught the trouble might as well get a 5 CH amp.
and do something to help out the overall quality overall.
