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TECHNICAL SPECIFICATIONS OF SPEAKER:

RESPONSE: 30-20.000Hz (±3dB, adjustable from the filter)
Impedance: minimum 8 Ohm
Sensitivity: near 100db 1w @ 1m


GENERAL DIMENSIONS:
Depth 0,60m, Width 0,40m, Height 2.0 m
Weight of about 150kg/ piece
Material construction MDF

Loudspeakers Driving Units:
FULL RANGE, 8 '' Fostex F208 modified, without crossover, with a range about 35 Hz, up to 8.000Hz, front and rear loaded horn, without and with coil 0.1mH (selectable)
TWEETER, Fostex T900 modified with big front horn, using a crossover with 2 cross point 5kHz & 8kHz (selectable), adjustable attenuation with autotransformer. Moving forward mechanism to correct phase (not shown at photos)
MISCELLANEOUS: speakers terminals binding posts from cardas, internal wiring cardas, No sound-insulating material used.

measurements :



SPL-Impedance and phase diagram of only the Fostex T900 tweeter, comparing the new big horn with the original of Fostex.
The improvement with the use of the large Horn is significant





Total Impedance-phase of the speaker, with the minimum value at 8 ohm
flat as possible, ideal for S.E. amplifier




SPL diagram of the total speaker.
This in NOT the final measurement, the sensitivity in not the correct one, because the measurement was done at lower volume for correcting the crossover.

The SPL phase is not the correct one, because this measurement was not taker for the phase alignment.
It's not flat, it has pumps, like a normal horn speaker, put it sound wonderful !!!



NEW speaker driver for DIAS
Tang Band 1772
with extra front baffle for correction at midrange



under development............

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