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Loft_and_... 100 kb The loft: 3-way horn mains sitting in the mouths of the Cement/stucco 30Hz bass horns. TT2.JPG 100 kb SOTA Star, SME IV, Ortofon MC 30 Super II DIY_RCM.j... 51 kb RCM built with a QRK broadcast TT, a rolling file cart from IKEA and a small shop vac. Oldhorns.... 100 kb 75Hz Tractrix w/JBL D130, Yuich Arai 290 Hyperbolic w/JBL 2440, Fostex T925a Circa 2001

75Hz-Trac... 88 kb LMS plot of 75Hz tractrix horn w/JBL D130 driver Yuichi-pl... 100 kb Yuich Arai 290Hz Hyperbolic horn w/ JBL 2440 driver 100-0042_... 100 kb Tooling for 280Hz Trctrix horn ready to begin laminating parts 100-0043_... 100 kb 1st part pulled has a few flaws but works well. Epoxy/Kevlar lamination W/clear gelcoat.

280-Trac.... 100 kb Plot of prototype Epoxy/Kevlar 280Hz tractrix horn w/JBL2440 100-0044_... 100 kb New vs. Old: Smaller, Louder and lower distion. The only area the VOT performed better was 1/2 octave lower respnse. oldsystem... 100 kb Old systems in my old shop 70Hz-fold... 100 kb My current midbass. Folding attenuates the breakup modes of the D130 significantly, and the horn loads well into the midbass region.

350trac_y... 100 kb Comparison between Yuichi 290Hz radial hyperbolic and 350Hz Round Tractrix horn. The same JBL2440 was used in both tests. Altec1005... 96 kb Altec 1005A/ 288B driver combo. The plots are with and without damping in the backchamber. Difference is negligible. Snake_oil... 80 kb Snake Oil™ IMG_0013.... 100 kb

Metal1.jpg 100 kb Public Image Limited Metal Box Pool_Skat... 100 kb circa 1977, a large swimming pool somewhere in Southern California subIII_co... 100 kb Prototype 8.5 cu/ft sub with B&C 21SW150 subIV_cop... 100 kb Prototype 8.5 cu/ft sub with B&C 21SW150

300Hx_con... 54 kb 12 sided 300Hz conic horn in solid mahogany with Cogent driver img_2044.... 100 kb Super Nova img_2038.... 100 kb Re-bodied Denon Dl-103r, cocbolo cogent.jpg 32 kb Full Cogent/esodesignstudio horns

cogent_ii... 57 kb Cloe-up of main array cogent_ii... 62 kb Full system #2 img_8966.... 100 kb Super Nova with Vacuum Module turntable... 64 kb

parts.jpg 100 kb Original table torn down original_... 100 kb Original power supply module new_power... 100 kb New supply mock up img_8066.... 100 kb

img_8068.... 100 kb img_7784.... 100 kb Main parts img_8651.... 100 kb Main Bearing img_7780.... 100 kb Vacuum module cover staves

img_7781.... 100 kb Vacuum module glue up img_7808.... 100 kb Vacuum module turning img_8426.... 100 kb Vaccum module veneering img_8431.... 100 kb Veneering

in_progre... 83 kb Plinth covers in progress plinth.jpg 61 kb Finishing complete_... 60 kb Completed Table img_5542.... 100 kb 840 Crossovers/ 813B

img_9367.... 100 kb Installed urei.jpg 100 kb Model and part urei1.jpg 100 kb More Parts img_5560.... 100 kb Complete Crossovers

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