All, I fitted a pair of these at the weekend into the rear pull down cupboard...
Pioneer TS-E1702is 17cm 2-Way
Thanks for the recommendation – I’ve just done the same, based on your recommendation, and the speakers are even cheaper now (£68 on Amazon Marketplace).
I thought it might be useful to post a guide with some pictures (it’s not a difficult job, but fiddly if you don’t have all the bits at the start and/or haven’t done similar electrical installations before…).
1. Remove the speaker back boxes. They are held on with double-sided foam tape, and I found that the best technique was to work a couple of plastic knives into the gap – it’s quite tough, and needs a fair amount of effort.
2. Unscrew the four screws holding main driver (needs a T2.5 torx driver), and unplug the connectors. Separate the speaker spacer rings from the original speakers – you’ll need these later.
3. Remove the midrange and tweeter enclosure (again, more foam tape), and the three screws holding this assembly in place. Replace the bolts and spacers that were holding the midrange and tweeter assembly (as these hold the front end of the speaker grill in place).
4. Install the new speakers, with the spacer rings from the original set – you’ll need eight M5 bolts with a 15mm thread length (bike shops sell them), as the original bolts will be about 5mm too short.
5. Either using Scotchloc connectors, or by cutting, soldering and using heat-shrink insulation, connect the original speaker leads to the leads supplied with the speakers. Make sure that they are connected with the correct polarity so that they are in phase – the brown wire on either side is negative and goes to the larger spade terminal on the speaker.
6. Replace the speaker enclosures using some more foam tape.
And there you have it – took me about 45 minutes, once I’d got everything together. I got some Dynamat with the intention of fitting it at the same time, but I haven’t worked out whether I want to seal the speaker enclosures, so I haven’t installed it yet.
Hope this helps someone - it's a worthwhile upgrade!