Results 1 to 7 of 7
  1. #1
    Loving This kexodusc's Avatar
    Join Date
    Nov 2003
    Location
    Department of Heuristics and Research on Material Applications
    Posts
    9,025

    Question about Class D subwoofer amp ratings

    This might not be in the right forum but here goes: I can't figure out what the impedance is for the associated power rating on the Class D amplifier used on my Paradigm PW-2100 and PW-2200. I'm pretty sure it's low, say 2 ohms or 1 ohm, just not sure exactly though. They both claim: "400 watts RMS (20150Hz @ < 0.1% THD), 1500 watts Peak" by whatever the FTC standards are...

    Paradigm has been no help. They either don't know, or refuse to tell, all they'll respond with is: "all Paradigm subwoofer amplifiers comply with FTC subwoofer amplifier measurement standards." Geez, thanks guys...

    Anyone who's ever been to FTC's website knows how difficult finding stuff can be...so here I am at the mercy of the collective pool of knowledge at ar.com...

    Anyone know?

  2. #2
    My custom user title This Guy's Avatar
    Join Date
    Jan 2003
    Location
    PA
    Posts
    759
    Most likely it is 4 ohms. It's not gonna be any lower.

    Joey

  3. #3
    Loving This kexodusc's Avatar
    Join Date
    Nov 2003
    Location
    Department of Heuristics and Research on Material Applications
    Posts
    9,025
    Hmmmm...there's many a Class D amp that handle 2 or even 1 ohms...whether there's 10" and 12" inch woofers made by Paradigm to go with them is another story...I could believe 4 ohms, though I'd expect the amp to be a bit bigger, but class D's are known for efficiency.

  4. #4
    My custom user title This Guy's Avatar
    Join Date
    Jan 2003
    Location
    PA
    Posts
    759
    Yeah but I haven't found any digital subwoofer plate amps that were rated for 2 ohms no matter what price. They are rated conservativley because many subwoofer drivers go below 4 ohms on certain frequencies.

  5. #5
    Loving This kexodusc's Avatar
    Join Date
    Nov 2003
    Location
    Department of Heuristics and Research on Material Applications
    Posts
    9,025
    Quote Originally Posted by This Guy
    Yeah but I haven't found any digital subwoofer plate amps that were rated for 2 ohms no matter what price. They are rated conservativley because many subwoofer drivers go below 4 ohms on certain frequencies.
    Yeah, I couldn't find any 2 ohm rated plate amps either when I built my parent's sub.
    Not that I was looking terribly hard, just Parts Express.
    This all started with me thinking up a new sub project, then I wondered how much it'd cost me to build something "comparable" to the PW series of subs offered by Paradigm. To do that I have to find a woofer that has similar specs, and of course, the 400 watts of power.
    I wanted to stay as close to the design specs of the 2 subs I have now, but I don't think a Class D is going to be the best way to go.

    Most Class D amps I've seen are either 1 or 2 ohms. Most plate amps aren't Class D.

  6. #6
    My custom user title This Guy's Avatar
    Join Date
    Jan 2003
    Location
    PA
    Posts
    759
    PE has a 500 watt rms plate amp (in 4 ohms) for $300. Pair that up with the 12" Titanic ($150), 15" DVC ($130), or 15" Titanic ($200). I personally would do the 500 watt amp and 15" DVC. That should be better than the PW series, although bigger and cheaper I believe. ( How much do they cost)?

    -Joey

  7. #7
    Loving This kexodusc's Avatar
    Join Date
    Nov 2003
    Location
    Department of Heuristics and Research on Material Applications
    Posts
    9,025
    Quote Originally Posted by This Guy
    PE has a 500 watt rms plate amp (in 4 ohms) for $300. Pair that up with the 12" Titanic ($150), 15" DVC ($130), or 15" Titanic ($200). I personally would do the 500 watt amp and 15" DVC. That should be better than the PW series, although bigger and cheaper I believe. ( How much do they cost)?

    -Joey
    I bought both of my Paradigm subs in Canada, one used, one new, but cheaper than I could build a MKIII 12". Work frequently sends me to Canada for a week or two at a time, I should take advantage of the duty free thing and buy Canadian speakers more often...

    I did a quick head to head with the MKIII 12" I built for my folks. The difference in power was negligible as both the PW amp and the 500 watt PE have plenty, though I expect at max levels the PE has a bit more juice left. I can honestly say the Paradigm has more bottom end though, just a bit more response into the low 20's I guess.
    I'm not interested in the 15" for the same reason I don't like the PW-2200 as much as the PW-2100, the larger woofer. I find them a bit sloppier (not as tight) as a smaller woofer. For HT only, sure the 15" would move air and be preferable, but I listen to concert DVD's and hopefully DVD-A/SACD's soon, and I definitely enjoy the smaller woofers.

    All that being said, if you buy the amp, and woofer and build and finish your own cabinets, you can build a MKIII 12" way cheaper than you can buy a PW-2200, and it is a superior value as I find it only gives up a bit of performance at a lower price. The 1000 watt 15" kit can be had for about the same price as the PW-2200 (or cheaper if you build your own cabinets) and be everything you need. Parametric EQ to boot.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. subwoofer and ohm question
    By marky in forum Speakers
    Replies: 5
    Last Post: 07-11-2004, 07:19 PM
  2. DIY subwoofer question...
    By Keith from Canada in forum Speakers
    Replies: 8
    Last Post: 02-09-2004, 12:44 PM
  3. subwoofer on/off question
    By poet726 in forum Speakers
    Replies: 8
    Last Post: 02-04-2004, 02:44 PM
  4. QIY Subwoofer question...
    By Keith from Canada in forum Home Theater/Video
    Replies: 1
    Last Post: 01-21-2004, 03:57 PM
  5. Please help: Subwoofer question
    By managuense in forum Speakers
    Replies: 15
    Last Post: 12-10-2003, 04:23 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •