AllegroSound

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Technical Audio Devices
TD-4001
compression driver










TAD TD-4001 compression driver employs a special DP-4001 pure beryllium diaphragm of 4" (101mm) across. Beryllium is a light but very rigid material that features very high-speed sound propagation. The weight of the dome section has been reduced to a mere 1g contributing to the very high efficiency (110dB/W) of this driver.




TAD TD-4001 employs an aluminum ribbon voice coil, insulated by alumite film and wound edgewise on the bobbin. The voice coil has a small mass yet offers a high conversion efficiency. The bobbin is formed of polyimide film, displaying excellent heat resistance to temperatures as high as 752ºF (400ºC).




Total magnetic flux is 228,000Mx, with flux density of 20,000G, thanks to the use of a very heavy 3kg alnico 5DG magnet. An oxygen-free copper shorting ring prevents impedance rise, resulting in low distortion.




TAD TD-4001 is of the rear compression design, which eliminates the resonance and phase distortion produced by a surround. It also eliminates cavity resonance interference, achieving very flat frequency response, extremely natural sound and superb definition.




A phasing plug helps smooth the response of extra high frequencies.




TAD recommends a Crossover-Frequency of 600Hz or higher with a Cutoff-Slope of 12dB/octave or higher.




SPECIFICATIONS TD-4001
Nominal Impedance 16 Ohm
Frequency Range 600~20000 Hz
Rated Input Power 30 Watt
Maximum Input Power 60 Watt
Sound Pressure Level 110 dB/W (1m)
Total Magnetic Flux 228.000 Mx
Magnetic Flux Density 20.000 G
Recommended Crossover > 600Hz, 12db/oct
Voice Coil Diameter 101,0 mm
Phasing Plug 5-slit type
Throat Hole Size 49,4 mm / 2"
Mounting Dimensions 101.6mm (4 Holes)
Weight 13,5 kg / 30 lbs
Dimensions (diameter x depth) 178x156mm / 7x6"


AllegroSound
−  Established 1973  −
"love what you listen with"
Los Angeles, California USA
Rick@AllegroSound.com
FOR SALE - TRADE 

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AllegroSound
−  Established 1973  −
"love what you listen with"
Los Angeles, California USA
Rick@AllegroSound.com
telephone 323.960.5014

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