SVS 25-31 vs 20-39

Discussion in 'Archived Threads 2001-2004' started by Robert Ma, Mar 26, 2002.

  1. Robert Ma

    Robert Ma Second Unit

    Joined:
    Jun 18, 2001
    Messages:
    368
    Likes Received:
    0
    Trophy Points:
    0
    I have a 25-31PCi on order. All this time waiting for it is making me reconsider the 20-39PCi and emailing SVS to see if I could switch my order.

    For the $100 bucks, should I? This should be the last sub I need to buy for a long time and maybe I should cough up the extra dough. I know I'm kicking myself now for not buying Paradigm Studios to start and I'm still running Monitors.

    What do you think? And if SVS is reading, could I change my order to upgrade to a 20-39 if decided?
     
  2. David_Stein

    David_Stein Second Unit

    Joined:
    Feb 13, 2002
    Messages:
    422
    Likes Received:
    0
    Trophy Points:
    0
    16-46PCi is in purple, 20-39PCi is in red, and the 25-31PCi is in light blue.
    [​IMG]
    im not the one to tell you how much the differences between the lines means in real world performance, but this has to help some...
     
  3. rodneyH

    rodneyH Supporting Actor

    Joined:
    May 22, 2001
    Messages:
    844
    Likes Received:
    0
    Trophy Points:
    0
    robert, I was in a similar situation as you, after I looked at the graph on hte website (the one posted just above mine) and considering I am more music than HT, I went with the 25's then had SVS install a custom port and NO charge that brought it down to a 22Hz-31 and with communication with the guys at SVS I modified my amp to give a 3 dB bass boost at 20-23 Hz, as I measure it, it is totally flat to below 19 Hz, good luck. I am very very happy.
     
  4. ColinM

    ColinM Cinematographer

    Joined:
    Dec 9, 2001
    Messages:
    2,050
    Likes Received:
    0
    Trophy Points:
    0
    If you are stuck with the 25, I'd have to say it won't be as bad as you think since freq's
     
  5. John Geelan

    John Geelan Screenwriter

    Joined:
    Oct 11, 2000
    Messages:
    1,087
    Likes Received:
    0
    Trophy Points:
    0
    The 25-31 is a great subwoofer. Give it a chance.

    JohnG
     
  6. Robert Ma

    Robert Ma Second Unit

    Joined:
    Jun 18, 2001
    Messages:
    368
    Likes Received:
    0
    Trophy Points:
    0
    Thanks for the graph David. I didn't catch that one on the site. I am not an expert at reading specs and what not, but am I correct that the graph shows the 25-31 is capable of producing frequencies under 25hz? It is just at a lower db than the others tuned lower? Is that what is called roll-off? Would a small room help in this area?

    The only bad thing about SVS is that I can't go audition both subs side by side and then decide. It's not really bad, but makes it a little harder for me.
     
  7. rodneyH

    rodneyH Supporting Actor

    Joined:
    May 22, 2001
    Messages:
    844
    Likes Received:
    0
    Trophy Points:
    0
    Robert, yes, you got all of the terminology figured out. Good luck, you will love the SVS
     
  8. Brian Fellmeth

    Brian Fellmeth Supporting Actor

    Joined:
    Jul 30, 2000
    Messages:
    789
    Likes Received:
    1
    Trophy Points:
    0
    I have had a 25-31 and a 20-39 side by side. You made the right choice. The extra output advantage of the 25-31 in the heart of the bass octave was easy to demonstrate, and I thought the 20-39's advantage in extension to be very subtle even on very deep bassy material. The fact that you save 100 bucks is gravy.
     
  9. Glen_L

    Glen_L Stunt Coordinator

    Joined:
    Sep 10, 2000
    Messages:
    86
    Likes Received:
    0
    Trophy Points:
    0
    I have to agree with Brian above--it was my 20-39 that I brought over to his place. I've since upgraded (is that an understatement) to a pair of 25-31CS+ subs.
     
  10. Robert Ma

    Robert Ma Second Unit

    Joined:
    Jun 18, 2001
    Messages:
    368
    Likes Received:
    0
    Trophy Points:
    0
    Thanks for the input. I'll stay with the 25-31PCi.

    Now to raise cash to upgrade to Paradigm studios and a projector.
     
  11. Bob Saylor

    Bob Saylor Stunt Coordinator

    Joined:
    Apr 8, 1999
    Messages:
    92
    Likes Received:
    0
    Trophy Points:
    0
    In all fairness one should point out that hearing the low end differences would be a lot harder than the upper end. Some of those frequencies are felt more than they are heard.
     
  12. David_Stein

    David_Stein Second Unit

    Joined:
    Feb 13, 2002
    Messages:
    422
    Likes Received:
    0
    Trophy Points:
    0
    Rodney: what did you have to sacrifice accross the rest of the frequency response to get it tuned at 22hz?
     
  13. rodneyH

    rodneyH Supporting Actor

    Joined:
    May 22, 2001
    Messages:
    844
    Likes Received:
    0
    Trophy Points:
    0
    David, that is a good Q, one of the SVS boys would have to chim in to give you that info
     
  14. Tom Vodhanel

    Tom Vodhanel Cinematographer

    Joined:
    Sep 4, 1998
    Messages:
    2,215
    Likes Received:
    8
    Trophy Points:
    0
    Hi Guys,
    tuning a 25-31 to 22hz will lower the maximum output capability of the unit a dB or so >25hz...but you will gain another 1/6th octave or so of extension.
    It's almost important to note...a 25-31 tuned to 25hz is going to extend to the 21-22hz range in most rooms(
     

Share This Page