I've heard of them, they turn up on eBay occasionally but that's about all I know of Alden.

Although I can't comment on that particular brand, a friend used to have an electro-resonator guitar (can't remember what make it was) and while it sounded OK, you had to have the amp turned up pretty loud to hear the amplified sound over the resonated sound so it wasn't much good for practicing at home. He ended up selling it because that stopped it having any practical use for him.
Gibson LP Traditional, LP GT, LP Studio, SG Standard x2
Barber Tone Press > EHX Worm >TC Polytune > EXH Glove > EHX East River Drive > Zoom G3 > TC Spark Mini Booster
Jet City JCA22H
My SoundCloud
Last edited by GaryBillington at Nov 6, 2011,