TD-4001
compression driver
DP-4001 Be diaphragm
TAD TD-4001 compression driver employs a special DP-4001 pure beryllium diaphragm of 4 inches (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.
voice-coil
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).
Alnico magnet
Total magnetic flux is 228,000Mx, with flux density of 20,000G, thanks to the use of a very heavy (6.6 lbs / 3 kg) alnico 5DG magnet. An oxygen-free copper shorting ring prevents impedance rise, resulting in low distortion.
rear compression
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.
xover
TAD recommends a Crossover-Frequency (Fc) 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 (Est.1973)
Los Angeles, California USA
Rick@AllegroSound.com
FOR SALE - TRADE 
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