I personally wouldn't consider trying to retro fit the more complicated active system, the passive system is so much easier to upgrade.

It really depends how much you want to spend and the sort of system you want to create.

But a good starting point would be to change the head unit for something a bit newer.

I wanted to improve the passive system on my tubby which just had the speakers in the doors and the two behind the seats under the rear quarter windows.

I wasn't looking for Mega bass best listened to 100yds down the road, just something with a bit more depth than was fitted by the previous owner.

First up I fitted a Kenwood BT44U head unit.

I guess that's sort of entry

- lower middle range, but I'm well pleased with the improvement.

You just need to buy the appropriate DIN converter to enable you to connect your new head unit to the Toyota style socket on the loom.

You can get these from Halfrods, just make sure it's the one for the passive system.

I think you'll find it really hard to find a good replacement door speaker that doesn't require some work to fit.

I quite like Vibe, and fitted a pair of their 5.25" speakers on my N/A, but had to make up some adaptor rings as I couldn't find any off the shelf ones that would work.

I did buy two of the plastic ones that you see listed on ebay all the time for the MR2, but they were a joke.

Nothing lined up at all.

A lot of folks just advise you to change the door speakers and forget about the ones at the rear, but I personally like to have a bit of back fill, and am fitting a pair of Vibe Slik 4s in that location.

Only got one fitted so far, but its a much nicer sound than the speaker previously fitted with a greater depth to the sound.

But these again aren't a straight replacement and I ended up unbolting the stock speaker brackets and drilling new holes to mount them.

My tubby is a t-bar and so I didn't want to go down the route of a big sub behind the seats.

I therefore decided to retro fit the stock sub from an active system, powered by a small Kenwood amp in the frunk.

I again fitted a Vibe 5 woofer in this and used loads of sound deadening material to try to lower the resonant frequency of the plastic enclosure.

It's not a

"true" sub in the sense that no 5" speaker is going to produce any meaningful output at really low frequencies, but it does again add a little more depth to the sound whilst retaining an OEM look.

You can usually roll of the unwanted upper frequencies for the sub on the head unit and or the sub amp.

But getting back to your original question, if there are speakers out there that you can just drop in, I haven't found them yet.

But it's not that hard to sort something out.

Any way, enough of my rambling.

Paul