Axiom Home Page Forums General Discussion Home Theater Sub for M22s, redux

Does this sub have a tuned port design? I am intrigued by the comment that it has a flat response curve all the way down to 22Hz. Usually there is a design compromise between output and the bass frequency extension. It would be interesting to see how the designer of this sub has dealt with this age old problem.

The Sunfire Junior Sub uses a pair of 8" drivers, one active one passive on opposite sides of the box. Check it out at www.sunfire.com.

At 1200W that thing could power my uncle's cottage. I still wonder about the accuracy of that number.
I've never heard the little beast though but i have heard several people talking about it. I'm not shocked it sounded better than Polk. In my opinion ANYTHING sounds better than Polk (a rare jab at a company on the whole there, don't get me started on Bose...).
As for the EP350, i'm going to throw together my final review on the last of my speakers probably tomorrow sometime, but in preview, if i turn it up too loud, it WILL blow out my basement window i kid you not!

I wouldn't take the time to use one of the Bose paper drivers to wipe my...

Hi chesseroo, prem, guys,

Subwoofer design is really interesting, but there's no free lunch. As a designer, there are ALWAYS trade-offs. So, if you want ultra-deep bass extension, to 22 Hz, you trade off sensitivity (efficiency), and if you want to achieve that in a tiny 9-inches-square box (a la Sunfire) with a very small driver, then you have to design a driver with a huge cone excursion(the linear back and forth movement). Then you must add a giant magnet/voice-coil "motor" assembly to drive the cone, and use an enormous amplifier to power the thing, because you have to pump a lot of air (to get 22-Hz extension) with a small cone.

You also give up maximum SPL, so the little Sunfire, although it's not "flat" to 22 Hz, it does indeed produce remarkable extension to that frequency and, in a modest room, will get the draperies flapping, as it did in the demo I saw in a Las Vegas hotel room at a CES show. And, of course, it's expensive, because of the necessary large amp and the custom-engineered driver. But if you don't need to fill a large room with high-volume ultra-deep bass, and you want something you can hide behind the draperies, then the Sunfire will do it.

Regards,

folks, Alan is right!! cone excursion is a very, very important factor in subwoofer design. For 12"", DIY'ers prefer the Shiva, Dayton DVC and the NHT have been a long classic... Now the cream of the crop are the BluePrint Drivers... The Dayton Titanic MKII Drivers(10"and 12") also have very good specifications. http://www.partsexpress.com/pe/showdetl.cfm?&User_ID=6934716&St=4413&St2=88059427&St3=71946153&DS_ID=3&Product_ID=15171&DID=7 is the address of the kit I own. There you will find even a review of Wes Helms of the subwoofer. You will also find all the complete specification of the subwoofer. the subwoofer is a 1"4.25" cube so is small... and the cost is only $349... now we're talking!

Thanks again to everyone for the input. Your comments, together with some research inspired by them, lead me to the following conclusions: (1) My dream sub, musical, deep, under $400, and with a footprint of a square foot, does not yet exist; but (2) manufacturers are moving in that direction, with enclosures getting smaller and prices falling (a web search turned up the Sunfire Jr. for as low as $649--still out of my price range, but a far cry from $1,000). I have therefore resolved to lie in wait for a bit longer. Who knows--in the meantime, perhaps a certain Loudspeaker Manufacturer That Will Remain Unnamed will introduce something along these lines!

I have a Velodyne CHT10 sub for my main HT system. Now that I've properly set up the Onkyo 797 THX receiver, the bass is terrific. I picked up a second sub for this system, a Klipsch LF10, supposedly goes down to 19Hz.

I almost bought a Sunfire Mark IV True subwoofer, but luckily I read a gaggle of owner reviews warning about quality problems and listened to one at my local high-end audio shop. Very unimpressive for 2700 watts! Not very musical, but rather, a very expensive one note thumper.

My HT system is now complete.

The Onkyo 797 THX receiver is terrific. I have a pair of Axiom built M60 type speakers up front (M665s) and Axiom built M22 type speakers for sides (M55s) and a pair of Mission 77ds bipole speakers for the back surrounds. These are driven by an outboard amp (Denon PMA 500V 85wpc amp) Center channel? My absolute favorite - an Axiom built Merak MC6H horn tweeter 2x6.5" driver anti standing wave cabinet center channel. This speaker has SLAM, clarity and sweet musicality. (paid $9 or $19 at uBid auction about a year ago).

I've set the front and center speakers at LARGE and the rest at SMALL. I currently have the Velodyne CHT10 connected to the 797THX, but am waiting for the Klipsch LF10 which I'll use in the primary position and daisy chain the Velodyne.

This system is way too good for me! May not deserve it, but I sure enjoy it. Axiom built speakers are AWESOME.

Look at the ACI web site, they are suppose to have realy good subs.

Bestboy4