FredT300B's Photos : Popular Photos : Front and back views of bipole single driver mass loaded transmission line speakers designed by Jim Griffin, using one 5" full range Creative Sound Solutions FR125S driver firing forward and one WR125S firing from the rear baffle. CLICK ON THE PICTURE FOR A LARGER IMAGE.

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FredT300B > The "Talleray", standing 7' 4" tall, is an open back dipole line array featuring fourteen 5.25" Foster extended range midwoofers and an Eminence compression driver mounted to a Dayton waveguide. Impedance is 7 ohms, sensitivity is about 96dB. The midwoofers run full range; the tweeter crossove is a 2nd order.

FredT300B > Front and back views of bipole single driver mass loaded transmission line speakers designed by Jim Griffin, using one 5" full range Creative Sound Solutions FR125S driver firing forward and one WR125S firing from the rear baffle. CLICK ON THE PICTURE FOR A LARGER IMAGE.

FredT300B > The 3 Pi Theater two-way using Eminence drivers.

FredT300B > One partially completed crossover. Geting the crossover right is the hardest part of building from scratch. The woofer section is 2nd order, the tweeter is 3rd order, crossed over at about 2.5khz.

FredT300B > Each enclosure receives three coats of fast drying semi gloss polyurethane varnish from a spray can. To get a smooth furniture finish the varnished cabinet must sit for 72 hours, after which I will lightly sand it with #220 paper and apply one final coat.

FredT300B > Tang Band W8-1772 full range drivers

FredT300B > Lee's 211 push-pull monster amp

Front and back views of bipole single driver mass loaded transmission line speakers designed by Jim Griffin, using one 5" full range Creative Sound Solutions FR125S driver firing forward and one WR125S firing from the rear baffle. CLICK ON THE PICTURE FOR A LARGER IMAGE.