I have the perfect solution. I don't have my RX300 anymore, but have the parts. It was installed from the premier installer in the Northwest. Factor sub is removed. Custom sub mounts in the rear, left trunk area (virtually no space is taken up). Factor amp is replaced w/ kicker impulse 1x702. Parts include a brand new (in unopoened box) s10d solobaric woofer (had it replaced by installer because the prev had a problem.) custom fit enclosure designed specifically for RX300. kicker impulse 1X702 amp. Bought for $1500. Selling for $500 OBO. I had an add posted in the buy/sell forum, but don't see it there anymore. I'll repost.
