Terry, all of them have the pop out wheels on the bottom.
Boogie, I agree - the amps are stupid small in these wheelies

. The clip and distort way sooner than any box I have ever owned or seen in person. It's light for it's size and most any other boomers just under the size of these will 99% of the time weigh MORE than the bigger wheely

. Yes, save up for a M90 if you can afford one - that way you have the POWER to back up the SIZE

.
They NEED to be upgraded with a seperate circuit board with independent amps away from the originals and possible upgrade the speakers then too.