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Driver replacement help.

Discussion in 'audio' started by linnfomaniac83, Aug 4, 2022.

  1. linnfomaniac83

    linnfomaniac83 I bet you can’t wheelie a unicycle!

    Hi guys, unsure whether this should be in DIY…

    Anyway, my cousin has managed to blow both bass drivers in his MK1 Ruark Crusaders, the original driver is Seas P17-RCY/P, the closest replacement I can find is Seas CA18-RLY but I think the baffles would need some careful routing to make them fit. Anyone have any other suggestions? It would be a shame to write these speakers off.
  2. James

    James Lord of the Erg\o/s

    Contact Seas directly. They may have spares, or can advise a more suitable replacement. Routing the cabinet to accommodate a bigger driver is not trivial.

    linnfomaniac83 likes this.
  3. linnfomaniac83

    linnfomaniac83 I bet you can’t wheelie a unicycle!

    Good idea, will get onto that tomorrow. My next door neighbour is an extremely skilled cabinet maker, so if it came to it, he would route the baffle… I certainly couldn’t do it without making a pigs ear of it. I do really want to find a good match rather then just sticking something in that fits the hole… I would rather modify the cabinets to fit a driver with a good electrical and acoustic match than fit something that drops in and sounds terrible/crucifies the amplifier. Something that drops in and works properly would be preferable.
    westsea likes this.
  4. James

    James Lord of the Erg\o/s

    The CA18-RLY, which I've used before has very different parameters from the P17-RCY/P. A ported design like the Ruark will be much more sensitive to T/S parameter changes.

    Can the blown drivers be repaired?
    linnfomaniac83 likes this.
  5. Yank

    Yank Bulbous Also Tapered

    Sometimes Falcon Acoustics have obsolete SEAS in stock.

    eBay is worth checking as well.
    Last edited: Aug 5, 2022
  6. sq225917

    sq225917 Bit of this, bit of that

    Coils can be rewound on new formers.
    Mike P and linnfomaniac83 like this.
  7. boon

    boon pfm Member

    Try here
    linnfomaniac83 likes this.
  8. linnfomaniac83

    linnfomaniac83 I bet you can’t wheelie a unicycle!

    I’m very much a novelist on speaker design, I’m not gonna lie!
  9. Mike P

    Mike P Trade: Pickwell Audio

    Si beat me to it. I was also going suggest investigating getting the original voicecoils rewound.
    linnfomaniac83 likes this.
  10. Vinny

    Vinny pfm Member

    By who?

    Unless someone has started-up doing it, there is/was only one person in the UK, possibly Europe, and they are a butcher-bodger, based on personal experience.

    This has come up here before if people want to search.
  11. linnfomaniac83

    linnfomaniac83 I bet you can’t wheelie a unicycle!

    Any ideas on a reputable driver repair service?

    I’m gutted for him, but I did worry about his lack of restraint with a pair of bridged Sony TA-N55 ES amps knocking out around 300 watts per channel.
  12. Vinny

    Vinny pfm Member

    As above, there isn't one unless somebody new has started in very recent times
    linnfomaniac83 likes this.
  13. linnfomaniac83

    linnfomaniac83 I bet you can’t wheelie a unicycle!

    I’ve called Falcon, seem like genuinely nice guys there. The guy who knows is out until this afternoon so they’re going to call me back. I have a feeling it’ll be expensive, because the speakers were expensive new and use higher quality drive units… but we will see!
  14. Geoffreybombom

    Geoffreybombom pfm Member

    Call Wilmslow Audio, they may suggest an alternative. Or call Will at Willys Hifi, he’s very good.
    linnfomaniac83 likes this.
  15. Beobloke

    Beobloke pfm Member

    I know who you mean as he screwed me over, too but I understand that he has now given up.

    Thank goodness…
    Vinny likes this.
  16. Vinny

    Vinny pfm Member

    This has been discussed before - rewinding voice coils, but I can easily see how making a good job on any easily dismantled driver could take 3 hours and more - strip, clean, measure and prepare the wire, winding the coil, varnish/glue the coil, connect everything up, re-assemble, test - the financials do not add up, especially for so niche/small volume a service.
  17. Beobloke

    Beobloke pfm Member

    Winding voice coils was one of my favourite tasks when building driver prototpyes back in my speaker-designing days.

    It was fiddly, time consuming and easy to muck up, but it was immensely rewarding when you got it right. If an old coil winding machine ever crossed my path I'd be sorely tempted to snap it up.
    westsea, linnfomaniac83 and Vinny like this.
  18. linnfomaniac83

    linnfomaniac83 I bet you can’t wheelie a unicycle!

    I’d be a customer if you did. I’ve wound transformers quite a few times but a voice coil is another task altogether, in large part due to the necessary disassembly and reassembly of the driver. I’ve re-coned a few drivers using OEM re-cone kits, and that’s fine because you don’t have to worry about damaging the original cone, dust cap and spider.
  19. a.palfreyman

    a.palfreyman pfm Member

    What's needed for coil winding? You see these machines on the net for few100 quid.
    Just thinking aloud here: What if all uk members chipped in a quid, or sommat like each...? If @Beobloke was up for it??? I know it's all the work getting the driver to pieces and rebuilt that's labour-intensive and requires precision but maybe the individual could do that themselves.
  20. sq225917

    sq225917 Bit of this, bit of that

    It's the centre shaft sizing that's the issue.

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