Technical Audio Devices
TD-4001
compression driver
DP-4001 Be diaphragm
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.
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 3kg 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 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
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