Originally Posted by PeterAlt
Is Definitive Technology SuperCube I 1,500W powered sub worth $499.99 new? The manufacturer claims it has a response range of 13Hz-200Hz. Has this been independently verified? What's the +-dB curve on this?
This is 1 of 2 subs I own. Bought it before I knew how to shop for subs
And believed the spec'd response. So you are wise to ask.
Their response is highly exaggerated. A Tom Nouissane (not sure of his name spelling) tested a lot of subs 5-7+ yrs ago and posted those results on a website. It might have been Secrets of Hi Fi, but I honestly don't remember. If you search the archives for the Supercube or Tom, you might find them. I think he was a very active online-shashki member as well so he might still be on the member roster & you could PM him.
The best the Supercube could do before reaching its -3 dB point was in the high 20's Hz, like in the 26-28Hz range. It CANNOT reach anywhere close to DT's spec'd 13 Hz; that number is bogus. O, it may have some miniscule output there, but it's not usable or really audible.
In my own room, I bought a test tone disc, and tested the freq response of my own setup. I couldn't audibly detect any sound below about 27 Hz, even putting my head next to the sub.
Is it an OK sub? Sure & for $500, it may be worth considering. When I bought mine, the MSRP retail price was ~$1200 and definitely not worth that considering competitive products. Not even a contest. Would I buy it again? No. Probably not even for $500.
I place a high value on a company being intellectually honest about their products and specs. While DefTech makes excellent speakers, I've owned a few myself, I have a problem when they don't specify "honest" performance and publish -3 dB or -6 dB output when there are so many speaker & subwoofer companies that not only publish those numbers but actually for the most part, live up to them - like Velodyne, SVS, Epic, Rythmic, Fathom, Hsu, etc.
This may be why they've dropped the price so radically
I'm not saying don't buy it, but buy it with the knowledge that it can't output the ultra-low frequencies <20 Hz, as is claimed.
Within its true performance parameters, the SC I is a good subwoofer. I use mine as the 2nd sub along with a Velodyne DD18, which actually does reach into the teens Hz, but the DD18 is a whole different class of sub performance & cost.