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....he commissioned Laurie to develop a TL subwoofer, now completed and delivered, and in Copenhagen Tympany split open the enclosure (built with 25mm MDF!!) using a 1200W amp playing 747 takeoffs recorded just off the runway at liftoff. Needless to say, they have now braced the box with 38mm composite MDF, and placed a 500Kg weight over the enclosure to hold it down in the anechoic chamber during testing. Indications are that it's holding; that's two 12" XLS Peerless drivers in isobarik configuration, BTW, and specially fan cooled voice coils.
I suggested that longer screws be used to hold the box together and suggested that they put a bolt through its neck to keep it together.
the meaning of this revelationrests upon what is not said
Andy, I have a mid 80's Linn LP12, Valhala, Ikok III, and a Denon DL160, yet to fit a 103R, going through Hughs Phono stage, GK1 and early 55 AKSA and TLB speakers. My digital source is a NAD Master series M55 universal player. By the way, have you changed the resistors in the phono stage yet? I would love another persons opinion on the mod.Mark