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Linn Isobarik PMS vs DMS

Discussion in 'classic' started by zoltm, Jun 16, 2013.

  1. zoltm

    zoltm pfm Member

    Dear Linn domain experts or any Linnie,

    I have recently engaged with an audio buddy on a discussion regarding the sound quality of a pair of Linn PMS vs DMS.

    It's the buddy's opinion that for Brik that is designated as "PMS" are the version made of specially selected drivers for professional application or delivery to studio.

    For those Brik designated as DMS are "standard grade" drivers for domestic market delivery.

    I want someone could shed some light on this regards.


  2. Willie Eckerslyke

    Willie Eckerslyke Occasional Optimist

    It's a little bit simpler than that - the only difference is the presence or absence of a crossover. DMS has a crossover, and is passive, PMS does not, and is actively driven by three stereo, or six mono, amplifiers plus active crossover filters. Late production were neither DMS nor PMS, as the crossover was removable.
  3. zoltm

    zoltm pfm Member

    So base on your understanding, they are fundamentally the same speaker. Should not have any difference in driver's quality and hence sound quality.

    Am I right?

  4. Audio Images

    Audio Images Trade: Audio Images

    yes, the same
  5. CJ1045

    CJ1045 You want Briks with that?

    Yes they are identical (except for the lack of crossover in PMS). We have sold many many pairs, restored a few and replaced drive units. As noted by others the PMS/DMS name distinction was dropped in 1988 as all Isobariks were then supplied without the crossver. If the customer wanted to use them passively then they had to buy the crossover as an extra.

    Krescendo HiFi
  6. david ellwood

    david ellwood Kirabosi Kognoscente

    There are however lots of differences between isobariks of different vintages.
    stephen bennett likes this.
  7. rontoolsie

    rontoolsie pfm Member

    I vaguely recall that the crossoverless PMS retailed for a higher price than the crossovered DMS. This maybe was to cover the extra cost of higher complexity dealer installation as in those days the Linn/Naim second market was non existent as were sales even a penny less than the full RRP.
  8. suzywong

    suzywong Wot, no electrons?

    There were also a number of DMS modified to PMS on the "mod scene" our second set of Briks, which are currently being nicely driven by a full Linn setup (karik,numerik, kairn, aktiv,LK280)

    We gave our old DMS Briks to friends:)
  9. zoltm

    zoltm pfm Member

    Would some Brik experts, help to get a sense what are the vintage of the following pairs of Brik,

    1. 33xx, 33xy
    2. 60xx,60xy

    Thanks and best.

  10. Snowy0968

    Snowy0968 New Member

    Back on here after a long period away from being on any forums.

    I have a beautiful pair of PMS active Isobariks, crossovers, full amplification options (Avondale SCC200) units all encased, everything supplied for the system.

    They sound great, but I just don’t need them as they were given to me after my close friend died.

    what the heck do I do with them…
  11. Nero

    Nero Don’t call me Bud

    I’ll PM my address. If you can cover the shipping cost too, that would be good.
  12. Bob McC

    Bob McC Living the life of Riley

    Make 49 more posts and you can sell them on here.
  13. Snowy0968

    Snowy0968 New Member

    well I guess that sounds okay...49 more posts you say!

    Okay...though by then I may have decided the specs is too valuable and put the whole lot on EBay, or others...

    thanks for the tip.

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