How is the sound quality of this sub when compared to the f20?
I've designed and built both styles and I personally prefer a good folded horn due to its low distortion when being pushed hard. It's design filters out the distortion much better compared to the tapped horn. The tapped horn gives more output for a given size when compared to folded but the exposed driver of a tapped horn can also sound more stressed when being pushed hard.
for what its worth, like mike said I have whaled on them and THD is still in single digits at very high spl.
The only folded horn I have is a THT, but its in my living room and not theater room. That being said my ears and guts really prefer this monster. It just seems effortless yet turns my theater seating into a full-on message parlor.
I wish I was more of a numbers guy with data and such but they do more than enough to my ears and room without even really pushing them hard. i have plenty of gain left on the ep4000 but that is only for when i want to whip it out and lay it on the table.
I'd just like to follow-up after a few months of constant usage: this thing kicks ass. hits hard for movies, subtle enough for basic TV watching, and blends really well with my RF-5's when I want to do some 2-channel music. I'm sure I could go after bigger and better, but this thing satisfies all of my needs.
My build was a disaster. Finally drug it outside to meet the chainsaw today.
Radman's are working great. He's been working his way through some other issues (like a sub output that is failing...), and we're both crazy busy with our day jobs. We will do a thread when we have the time.
They are big, but if you have the room, they deliver.
Since I don't have the room, I have doodled up yet another fold idea for me...