Just Upgraded the 20-39PC+ to the PB2+ !!

Discussion in 'Speakers' started by Kevin_Wadsworth, Aug 5, 2003.

  1. Kevin_Wadsworth

    Joined:
    May 1, 2003
    Messages:
    39
    Likes Received:
    0
    First off, I must say that the PC+ has been a great unit for the 5 months that I've had it. It just was a little undersized for my room (Tom V. calculated ~10,000 cubic foot including adjacent spaces). Actually with that space to fill, a single PB2+ is probably undersized, but a second one is not in my budget. (Yet...)

    First off, I must say that this is physically a nice unit - well put together and has a nice new organic solvent smell fresh out of the box (I work for a chemical company). My brother-in-law has a Hsu VTF-2 and I figured that the finish on the PB2+ would look similar to the VTF-2's. The Hsu finish isn't bad, but I happy to say that the PB2+ is much, much nicer.

    So I drug it over to the corner, hooked everything up and calibeated with Avia (~1 dB hot, not including RS correction factors). This was the same level I'd calibrated my PC+ to, so I put in Star Wars II and did some SPL comparisons (with all speakers running, I was too lazy to disconnect them and just run the sub). With the master volume set at -5 dB, I had readings of 100 dB during the THX intro, 101 dB on the fly-bys at the beginning, and 103 dB on the explosion with the PC+. With the PB2+, I had 105, 107, and 107 dB on the same 3 scenes. These are the best readings I could get with the meter set to fast response, but it seems that the new sub added about 5 dB across the board. Not too shabby.

    Doing a quick test sweep with Avia, it does roll off noticeably in the 20-25 Hz range (as you would expect), while the 20-39 didn't (again, as expected). I haven't played yet with anything other than the stock tune. The sweep test also revealed a few new things in my room that rattle. [​IMG]

    Overall, a great upgrade. If you have a somewhat smaller room, my old sub is for sale on the hardware forum. Althogh while I still have it, maybe I'll hook them both up and see what it sounds like...

    - Kevin
     
  2. Steve Stogel

    Steve Stogel Supporting Actor

    Joined:
    Jul 19, 2000
    Messages:
    600
    Likes Received:
    0


    That, I'm afraid, would be a mistake. You will find the PC+ much harder to part with, I think, if you do that.

    Steve
     
  3. Jon-C

    Jon-C Stunt Coordinator

    Joined:
    Mar 18, 2003
    Messages:
    95
    Likes Received:
    0
    Kevin,

    When did you order your PB2+?
     
  4. Edward J M

    Edward J M Cinematographer

    Joined:
    Sep 22, 2002
    Messages:
    2,031
    Likes Received:
    0
     
  5. Kevin_Wadsworth

    Joined:
    May 1, 2003
    Messages:
    39
    Likes Received:
    0
    Good point Ed, I just tried it and dropping the filter does produce less roll-off at the bottom end. I'd read your post on how you set up your sub, but i think I'll stick with the stock tune for myself - I don't want to risk bottoming the drivers.

    A second sub would be great, aside from $$, not having a good spot to put it, and having my wife drive the nearest sharp-pointy object through my heart. Also, at this point my sub outclasses the rest of my system (Paradigm Monitors, CC-370, and Titans + Mission 773 for the rear-back) so if I upgraded anything I'd probably spend it on the front mains.

    Jon-C: I ordered on June 7, so a two month turn-around time for me. But they threw in a free T-shirt! Unfortunately it's size XXL and I'm just under 5'6". [​IMG]
     
  6. Ron Stimpson

    Ron Stimpson Stunt Coordinator

    Joined:
    Jul 19, 1998
    Messages:
    199
    Likes Received:
    0
    XXL!

    Sorry Kevin, you sounded so much larger in your e-mail. 8^)

    Tell the wife it's really for her, it's not a t-shirt BTW, it's a mini-skirt ;^)

    Ron
     
  7. Bhagi Katbamna

    Bhagi Katbamna Supporting Actor

    Joined:
    Jun 1, 2000
    Messages:
    870
    Likes Received:
    0
    10,000 cu. ft. room = need to run both. A future upgrade should be a parametric EQ.
     
  8. Kevin_Wadsworth

    Joined:
    May 1, 2003
    Messages:
    39
    Likes Received:
    0
    No problem, Ron - my wife already claimed it as a nightshirt.

    A future upgrade will definitely be a parametric EQ. As an engineer, I'm always interested in making things better when possible. Although having gome from a JBL "sub" with nothing below 40 Hz, to a PC+, to a PB2+, I'm curious how much better things can get!

    - Kevin
     
  9. Kevin_Wadsworth

    Joined:
    May 1, 2003
    Messages:
    39
    Likes Received:
    0
    BTW, I quickly hooked up both subs - no optimization of placement or phase - and got about an extra 2 dB or so on the same scenes.

    - Kevin
     
  10. steve nn

    steve nn Cinematographer

    Joined:
    Jan 12, 2002
    Messages:
    2,418
    Likes Received:
    0
    HEADROOM is a good thing. I just watched SW-I at +2 and at a +3dB sub calibration. Absolutely incredible.[​IMG]
     
  11. Carlo Medina

    Carlo Medina Executive Producer

    Joined:
    Oct 31, 1997
    Messages:
    10,450
    Likes Received:
    651
    10,000 cubic feet! [​IMG]

    Run both, baby!
     
  12. CurtisSC

    CurtisSC Screenwriter

    Joined:
    Jan 28, 2003
    Messages:
    1,412
    Likes Received:
    0
     

Share This Page