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Thread: Cabinet Plans for Tannoy HPD 385

  1. #21
    Join Date: Sep 2014

    Location: Northern Ireland

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    I'm John.

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    Cheers Geoff!
    Naim CDS CD player, BTE Khozmo passive preamp, Luxman Avance Z504 power amp, Lockwood Academy speakers with Tannoy HPD385 drivers, BigBottle Audio Spotfire interconnects.


  2. #22
    Join Date: Sep 2014

    Location: Northern Ireland

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    I'm John.

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    Just testing....

    Naim CDS CD player, BTE Khozmo passive preamp, Luxman Avance Z504 power amp, Lockwood Academy speakers with Tannoy HPD385 drivers, BigBottle Audio Spotfire interconnects.


  3. #23
    Join Date: Sep 2014

    Location: Northern Ireland

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    I'm John.

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    Good solid 18mm plywood crate heading for the skip. Cut in half gives 2 nice sized 175L cabs.
    Naim CDS CD player, BTE Khozmo passive preamp, Luxman Avance Z504 power amp, Lockwood Academy speakers with Tannoy HPD385 drivers, BigBottle Audio Spotfire interconnects.


  4. #24
    Join Date: Sep 2014

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    I'm John.

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    Port dimensions are from this drawing, internal volume of cab is the same.

    Naim CDS CD player, BTE Khozmo passive preamp, Luxman Avance Z504 power amp, Lockwood Academy speakers with Tannoy HPD385 drivers, BigBottle Audio Spotfire interconnects.


  5. #25
    Join Date: Mar 2017

    Location: Seaford UK

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    I'm Dennis.

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    Hard work, but scotia PVAed in the corners will help.

  6. #26
    Join Date: Sep 2014

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    I'm John.

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    Thanks Dennis, I have some 3/4” lath for that.

    The frost is sitting thick on the cars in the driveway so I’m not overly inclined to go out to the garage just yet!
    Naim CDS CD player, BTE Khozmo passive preamp, Luxman Avance Z504 power amp, Lockwood Academy speakers with Tannoy HPD385 drivers, BigBottle Audio Spotfire interconnects.


  7. #27
    Join Date: Sep 2014

    Location: Northern Ireland

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    Bit parky here today, this is INSIDE the garage




    All corner and edge bracing cut, glued and screwed in. The electric chop saw is the only way to go with this kind of work, I was able to get them just ďsoĒ for length that a gentle tap was required to fit them in, sweet! Glue and screws not totally necessary



    Going to take the drivers out of the Lockwood cabs now and put them in the front baffles to get the holes marked for the mounting bolts.
    Naim CDS CD player, BTE Khozmo passive preamp, Luxman Avance Z504 power amp, Lockwood Academy speakers with Tannoy HPD385 drivers, BigBottle Audio Spotfire interconnects.


  8. #28
    Join Date: Sep 2014

    Location: Northern Ireland

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    I'm John.

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    Never tire of seeing these big drivers in the flesh, awesome. There’s a smell inside those Lockwood cabs that’s unique too, think it’s that horse hair type felt lining.

    Yip, driver mounting PCD is 370mm as per Tannoy drawings, just checking.

    Interestingly the cut out in the Lockwood baffle is only 295mm diameter. Wonder is that deliberate or a mistake. Sounds more like the size for the HPD315. Never noticed before, can’t see through the thick grill cloth.

    Right, back to work.
    Last edited by JohnJo; 18-01-2020 at 18:34.
    Naim CDS CD player, BTE Khozmo passive preamp, Luxman Avance Z504 power amp, Lockwood Academy speakers with Tannoy HPD385 drivers, BigBottle Audio Spotfire interconnects.


  9. #29
    Join Date: Mar 2017

    Location: Seaford UK

    Posts: 1,178
    I'm Dennis.

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    Quote Originally Posted by JohnJo View Post
    Never tire of seeing these big drivers in the flesh, awesome. Thereís a smell inside those Lockwood cabs thatís unique too, think itís that horse hair type felt lining.

    Yip, driver mounting PCD is 370mm as per Tannoy drawings, just checking.

    Interestingly the cut out in the Lockwood baffle is only 295mm diameter. Wonder is that deliberate or a mistake. Sounds more like the size for the HPD315. Never noticed before, canít see through the thick grill cloth.

    Right, back to work.
    If you use ample glue their is usually no need to use screws, and as it dries the water is absorbed into the wood pulling the mould into the corners, and the whole joint becomes very tight and solid.

  10. #30
    Join Date: Sep 2014

    Location: Northern Ireland

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    I'm John.

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    Just back to these this evening.

    Cross bracing fitted and driver mounting holes drilled in both cabinets.

    If I find the bass too bloated I might staple some felt across that bracing like the aperiodic Lockwood Major cabinets and see what thatís like.

    Naim CDS CD player, BTE Khozmo passive preamp, Luxman Avance Z504 power amp, Lockwood Academy speakers with Tannoy HPD385 drivers, BigBottle Audio Spotfire interconnects.


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