What's wrong with Velodyne?

There is nothing wrong with Velodyne - I have had their subs for years and currently have a DD-15 that works amazingly well for both 2 channel and HT in a high-end system. I actually bought it in a dedicated audio store and I would put the DD series up against ANY other subs at any price. They are great subs - do not be put off by dealers with their own agendas.

When I had a service issue with an HGS yeas ago, Velodyne was very helpful and accommodating. If you are having problems finding a Velodyne dealer in your area, try calling Velodyne.

Nothing wrong with the Velodyne DD series at all but the DD15 was not in the same league as the JL Audio F113 from what I heard as well as the dealer. DD18 is a different story however. Can fill a big room but the F113 seemed to be more musical to me. The JL's can really hide themselves. I have never found a ported sub able to hide very well either so these were not for me. I ended up with two F113's but could have easily went with two DD18's.

I hope nothing! I just ordered an Optimum-8 for use in a music only system.

I'm planning on using it to augment a pair of NHT Classic Threes that are -3db @ 45hz. Currently I'm using a $300 Outlaw LFM-2 to do the same and am fairly happy with it but have been thinking of upgrading for a while and some Christmas money made it possible - plus OneCalls price of $999 shipped.

Should be here Thursday!

Value for money, beyond that not much.

In my experience, most new Velodyne subs that cost up to $600 and 50 lbs or less will come without any type of suspension or damping foams. Their internal are VERY simple design. Thus, by adding/glue-ing some type of foams to inside walls, the Velodynes (or any others) would sound so much smoother and have a better bass control. Diff will be night and day. I personally use 1" thick pink packaging foams (egg shell).

Note:
-Its port must maintain free of clearance.
-Too much foams added, the sub might/will sound muddy or stuffy.
-Since you changed the sub's characteristic, relocate or re toe-ing it may be needed.

Adding SMALL bag of sand would help stablize the sub, minimizing vibration. But its internal volume would be degrease dramatically so just try one step at the time to see what fits you most...