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ID # 130411    CURRENT CATEGORY - SPEAKERS

For Sale: TAD 4001 DRIVERS WITH ORIGINAL BERYLLIUM DIAPHRAGMS 2 EACH (ONE PAIR)
[PRICE SHOWN FOR THE ENTIRE CONTENT OF THIS LISTING]
Listing last update on September 24, 2020 - Viewed 220 times

TAD 4001 DRIVERS WITH ORIGINAL BERYLLIUM DIAPHRAGMS 2 EACH (ONE PAIR)

TAD 4001 (YOM: ?) (S#: TBD) LIKE NEW (9-10) FEATURES:

TAD 4001 DRIVERS WITH ORIGINAL BRYLLIUM DIAPHRAGMS!   

2 EACH AVAILABLE IN LOT...

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 (1W,1M), 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 2.28X10-3WB, WITH FLUX DENSITY OF 2.00T, 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.

EXTRAS:

COMES FULLY TESTED AND READY TO USE

MODIFICATIONS:

COMES FULLY TESTED AND READY TO USE

HISTORY:

BOTH DRIVERS WERE ONLY USED IN OUR WAREHOUSE FACILITY FOR DEMONSTRATION PURPOSES. 

THEY WERE KEPT AS SPARES.  

COMMENTS:

COMES FULLY TESTED AND READY TO USE

THIS UNIT WAS NEVER TOURED

WWW.SOUNDBROKER.COM LINKING BUYERS AND SELLERS TOGETHER SINCE 1997 FOR NEW AND USED PROFESSIONAL AUDIO, LIGHTING, STAGING, PROJECTORS, AND VIDEO EQUIPMENT.

Additional Details
ID#: 130411
Listing Type:
Standard
Model: 4001
Manufacturer: TAD
Condition: LIKE NEW (9-10)
Shipping Info: 56.00 lbs.,
Seller's Location: CA, USA
Updated: September 24, 2020
M.S.R.P.: $0.00
Offered at: $2,475.00

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