The TD-4001 successfully achieves all the design objectives we set forth – very high efficiency, wide and perfectly flat response from 600Hz to 20kHz, and low distortion.
DIAPHRAGM
The TD-4001 employs a pure beryllium diaphragm 3-15/16 inches (100mm) 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
The 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).
MAGNETIC CIRCUIT
Total magnetic flux is 228,000Mx, with flux density of 20,000G, thanks to the use of a very heavy (6 lbs. 10 oz./3kg) alnico 5DG magnet. An oxygen-free copper shorting ring prevents impedance rise, resulting in low distortion.
DESIGN
The 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.
CROSSOVER
We recommend the use of a crossover frequency of 600Hz or higher, and a cutoff slope of 12dB/oct. or sharper.
TD-4001 Specifications:
- Rated Impedance: 16 Ω
- Frequency Range: 600-20,000 Hz
- Rated Input Power: 30 W
- Maximum Input Power: 60 W
- Sound Pressure Level: 110 dB (1W1m)
- Total Magnetic Flux: 2.28 x10-3 Wb
- Magnetic Flux Density: 2.00 T
- Lowest Recommended Crossover: 600 Hz
- Voice Coil Diameter: 101 mm
- Phasing Plug: 5-slit rear type
- Hole Size for Throat Connection: 49.2 mm
- Mounting Dimensions: 101.6 mm (4 holes)
- Weight: 12.6 kg
- Dimensions (diameter x depth): 178 x 155.5 mm
Diaphragm repair parts
DP-4001
View the full TAD Collection Brochure
Prompt Delivery and Professional Packaging
Our long-standing partnership with UPS FedEx DHL and other global carriers lets us offer a range of shipping services. Our warehouse staff is extremely skilled and will package your items according to our precise and exact specifications. Your goods will undergo an extensive inspection and be safely packaged prior to being sent out. Each day, we ship to thousands of customers in many countries. The fact that we are committed to becoming the biggest online retailer in the World is clear. These warehouses are in Europe in the same way as they are in USA.
Note: Orders that include more than one item are assigned a processing period depending on the item.
Before shipping, we will inspect thoroughly the items you have ordered. Most orders are shipped within 48 hours. Expected delivery time is between 3-7 days.
Returns
Stock is dynamic. It's not entirely managed by us since we are involved with multiple entities, including the factory and the storage. The actual stock can change at any moment. It is possible that your order may be out of stock once the order has been placed.
Our policy lasts for 30 days. We cannot exchange or refund your order if it has been 30 days from the date of purchase.
For your item to be returned it must be in its original packaging, unopened and in the condition you received it. The item must be in its original packaging.
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