NUFORCE AMPS FOR PASSIVE SUBWOOFERS

Ptheo, $1350 is a very good price for a pair of Ref 9.02s. I'd snap them up if I was interested.

The extended bass version doubles the input capacitance and results in the bass response being a bit more linear out to 20Hz. It gives the amp a little more weight on the very bottom but it's not a night and day deal. I think Nuforce only charged about $75 for that mod.

As I have stated in my other NuForce posts, I (and others) believe the amps sound best with the internal speaker post capacitor removed (which is a cheap, no-cost tweak). You can snip one capacitor leg just to try it and solder it back in place if you think the cap makes it sound any better.

300 watts ain't much for subs...

Crown K1/K2. K1 is 1500W bridged @ 4ohms, K2 is 2500W bridged at 4ohms.

Damping factor is right up your alley at >3000, although personally, I think that spec is not TOO important.

They are small for their power because they are a "digital" amp, but they are not miniature by any standards. If you are looking for great performance in a sub amp you should investigate these.

The K1 Destroys the Nuforce, no joke... It is a pro unit, no fan, barely any heat, and can be driven way beyond the input voltage and has a 28 db setting, 1.4 volt setting, and bridge Switch...Can take full boosted output of like 20 db gain from a parametric or other processor, especially pro units that can do this. I picked one up for 400 used, it is a very similar to digital design, I swear I did see a module inside the Crown that had ICE written on it, but not to mention it only idols pulling 12 watts from the wall, it is All U.S.A built, and dead silent, ZERO FM interferance problems, Zero Hum, Zero HISS... On 98 DB efficient drivers.. Now I have heard the nuforce standard versions, they will not hold up to the crown.. But the Crown has a Huge Torroid and Way Higher Peak power for way less money, and again it is a pro unit designed for a good beating, has built in limiters, and Has Individule Detent Gain Controls for each channel so you can taylor to your liking. Only problem with them is the Binding posts are rediculously close on the back and a little tuff to hook up without using a Quarter to tighten them up, and you will need to have RCA to Balanced cables if you are running RCA.. You will not hear the Crown K1 Click, Pop, or Hum when Turned on, it will not Dim the lights etc... Not to say the nuforce will, just giving an Idea of the quality in this unit. By the way the Crowns are Stereo, but if you must have mono blocks to seperate across the room, than well you need 2, otherwise go with the nuforce, but seems to be a waste of money for Subwoofer bass.

I've owned the Crown K1 and used it on my Apogee Studio Grand subs. Didn't like it. It had plenty of output, but no bass definition. I thought it would be the ultimate amp for my subs, but I was wrong. My Classe 201 amp smoked it but runs much hotter. I want a amp(s) that I can leave on 24hrs and not worry about heat/power consumption. Thanks for the Nuforce info Plato. Looks like 9se's are the ones to get! I just ordered a Velodyne SMS-1 so I need to find some power for my Kinergetic subs soon!

Give EarthQuake Sound in Hayward, California a call and see if they'll sell their plate amps separately. You'll have a high pass filter and gain control with low and high level inputs, little to no heat, and signal sensing auto on. Nice folks and great service too.

I agree with Ptheo regarding Crown's K series. I used one in my electric Bass rig, which includes a Bag End sub that needs 400 watts max, simply poor low level definition. For Pro amps check out Crest or QSC, I believe they're both making fan-less models.