Thanks for the interest guys, I'll try to answer a couple of things.
The choice of 50w + 50w amps was multiple:
1. It's a good amp. It has plenty of power for the bass driver - don't forget that 50w active coupled directly to the driver is far more powerful than 50w from a stand alone amp into a passive speaker because you don't lose power going through the various inductors, capacitors and resistors in a traditional crossover! Having one of those on each individual driver means you can play very loud without distortion (105dB continuous - 115dB peak output at 1m), why use more? Which brings me to point 2 -
2. It's powerful enough yet not so powerful that it can damage the drivers - if you happen to plug them into a CD player at full volume (as mentioned elsewhere in the thread) you won't blow the drive units. This is a designed-in safety and durability feature. We want these speakers to last, we don't want returns and repairs!
3. It keeps costs down - buying 4 x the same amps per pair means we can more easily meet MOQ price breaks to keep the costs lower to our customers, even though the AE1 Actives retail for £1000 we think they still offer pretty great value compared to passive speakers of equivalent quality (AE1 Classic) plus a 200w Class A/B amp.
As for preamp control - we accept that's a trade-off, if you only have a CD player or turntable as a source it's definitely preferable to add a preamp or DAC with volume control, if you have multiple sources you'd need something to switch between them anyway. Some people will be ok with this, some won't like it, that's ok! There are different options that offer different approaches, no right or wrong.
If we were to add a volume control what would be the best way? With another lead connecting the speakers? With a remote that operates both (but would need to be aimed carefully so as not to adjust only one), Bluetooth? All add cost or additional mess so we made the decision to keep the speaker as simple as possible and cost down. Buying a quality preamp is probably a lot cheaper than buying a full 200w amplifier for a passive pair of speakers after all, let alone the sonic benefits of the active layout.
We leave a physical volume control on the speaker along with bass/treble trim so you can set a maximum level you're happy with to avoid any awkward moments, there are dots to aid precision. At Bristol we ran them at 3/4 power off of a Bluesound Node 2, the few times we turned that to max were extremely loud. In testing and development I spent 90% of the time playing high bitrate tracks direct from my phone plugged into a 3.5mm -> RCA Phono cable and controlled volume from the phone. That's a pretty simple system!