Dual SVS PB2's+ vs the B4+

Discussion in 'Speakers & Subwoofers' started by Mike Sloan, May 18, 2003.

  1. Mike Sloan

    Mike Sloan Second Unit

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    Has anyone commented on the performance differences between "dual" PB2's and a single B4+? I realize the PB2 is just "out of the oven"...but still fun to speculate. Assume you are pushing the B4+ with a Crown K2....I am starting to think that dual PB2's may have an advantage....am I wrong? I have done a search for this particular comparison...but came up short. Any words of wisdom.....TV?
     
  2. Dustin B

    Dustin B Producer

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    I pretty sure I remember TV mentioning that dual PB2+ will likely be able to outgun a single B4+. Mainly because the dual PB2+ will have an extra pair of 4" ports.

    But that the B4+ has the other advantage of the push pull config on the drivers (doesn't affect output as much as sound quality). Whether this will be subtle or big I don't know.
     
  3. steve nn

    steve nn Cinematographer

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    Mike when I read the Thread Header I thought of you and sure as heck there is your name on over to the right. I bet your thinking duel real hard aren't you?? Come on I know you are![​IMG]
     
  4. Edward J M

    Edward J M Cinematographer

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    Mike:

    Tom V has stated on a few occasions that the B4+ in stock tune (25 Hz) is equivalent to nearly five 25-31CS+.

    In stock tune (25 Hz), the PB2+ will hold its own against dual 25-31CS+ down to about 28 Hz, and then the twins pull away a bit in the 23-25 Hz range.

    While on paper, dual PB2+ have a 50% edge in port area over the B4+, Tom has hinted in the Klipsch forum that there is more to the push/pull alignment of the B4+ than just sound quality.

    If I was going bench racing, and I was an astute study of Tom's posts (which I am), I would give a slight nod to the B4+ with the K2 over dual PB2+. My usual disclaimer applies - I didn't design the darn things and I just know what I've read posted elsewhere - Tom always has the final word.

    Regardless, I'm sure either combination would be simply amazing in even the largest HT/music rooms.

    Regards,

    Ed
     
  5. Mike Sloan

    Mike Sloan Second Unit

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    Ed...that's kinda what I have been thinking. I already have a K2...but could sell it easily if I was to buy a powered sub like the PB2+. The way I am seriously headed is to go with (4)SVS Ultra's running 2/side in parallel (600W/driver). It is expensive and so I was exploring cheaper alternatives..like dual PB2+'s. TV has said that (4) Ultra's would just about destroy anything out there...especially in the 20HZ and below department! I was also thinking about the Everest/Tumult option...but there are some issues that have made me wary with that approach. I need to get off my butt and pull the trigger...just need that World-com Stock to take off!:b
     
  6. Mitch E S

    Mitch E S Stunt Coordinator

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  7. Edward J M

    Edward J M Cinematographer

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    Mike:

    If you are leaning towards 4 Ultra's and cost is an issue, then why don't you look at 4 20-39CS+?

    I have heard both, and yes - the Ultra IS better. But only you can decide if it is worth the $325 premium over a CS+. Buy four of them and you're looking at $1,300 extra over four CS+. That's not chump change.

    If you have the floor space and the amps, four 20-39CS+ for $2,300 would better either dual PB2+ or a single B4+ below 25 Hz and would really pull away in the 15-20 Hz range.

    Of course, the PB2+ is the killer value in all of this - for $2400/pair, you get the 900 watt amp built right in, and it takes up a bit less floor space than co-located cylinders. Tune them to 20 Hz, and it won't have quite the sheer output as four CS+, but it would still be killer in terms of output and a neater (from a wiring standpoint) and more economical solution.

    Regards,

    Ed
     
  8. Tom Vodhanel

    Tom Vodhanel Cinematographer

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    Hi Guys,

    I'll be doing some gound plane work with a few new designs later this week...and I'll drag out a PB-2+ and a B4+ and see how they compare. I can make some guesses based on older GP work and simulations...but I'd rather just wait to see how they do outside.

    Mike, I don't like to get into discount offers or anything like that on a forum...but if anyone is considering 2(or more) SVs please contact Ron or myself. SVS always tries to factor in some modest discounts for multiple unit purchases.

    Tom V.
    SVS
     
  9. DON'T SELL THE K2!!!

    That is the amp that sub dreams are made of [​IMG]

    If you are set on SVS (which it sounds like you are) and the question is: sell the K2 and get a PB2 and if it isn't enough, get another PB2...OR..keep the K2 and get a B4+.....then you have a tough question to answer[​IMG]


    here are the things I would consider.
    1) small room?: a single PB2 will be more than enough
    2) the B4+ looks much better than the PB2 (SAF).
    3) w/ B4+, push pull cancels out odd order harmonics (or is that even?)=lower distortion
    4) integrating 2 PB2s will be harder than a single B4+ if you have them in two different locations (would you want to stack/sidebyside them?)
    5) The K2/B4+ may need a rumble filter depending on how you push it.
    6) _____________ (that blank is for the multitude of other factors that I have not thought of [​IMG]
     
  10. TommyL

    TommyL Supporting Actor

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    At 25HZ, I think a B4+ equals 4 ultras...below 25 HZ, a B4+ = 3 Ultras...I would give the B4+ a lot of headroom as one vantage point...plus, the beauty of it[​IMG] I posted my pics a while back ( just scrapped up some cheesy sight for now...didn't have any MB left on my other, but here it is:

    http://home.mchsi.com/~toml/wsb/html...ome.html-.html

    I pondered that dual PB but man, they are big[​IMG] hence me getting the B4+....working on numbers right now...hopefully I'll have some by the weekend...good enough to post...I need to buy time..just not enough of it!! I can tell ya that that baby brings the place down...literally...any its sounds VERY VERY good with music...works perfect/ blends so damn well with my speakers/setup, I am still in awe...and yes, 2 channel should be 2 channel...but not after hearing it with this..."tight" is a word I've used and abused! hats off to TV, Ron and co....someday another giant may make its way here...now dual B4+'s...*ponders*...[​IMG]
     

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