DD Audio AT-28a PRO
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The New AT-28a PRO is a new design that offers a soft rich sound with
extraordinary detail and excellent off axis response. This 1.1” natural
silk dome coupled to a high roll surround is ultra light for both higher
sensitivity and extended frequency bandwidth. The dome is driven by a
copper clad aluminum ribbon wire voice coil wound on a titanium former
in an underhung magnet gap. This ultra light and rigid structure passes
energy without distortion.
The diaphragm system is driven by a powerful neo magnet motor with
copper shorting ring. The motor is mounted in a dual balanced
compression chamber improving the transient dynamics over a broad
bandwidth. The internal flow optimized vents and baffles eliminates
standing waves between the chambers and couples the air masses together,
and in combination with the high roll surround, allows an ultra low Fs
of 675 Hz. The laser etched backplate and large hex pattern grill
aesthetically finishes off this sonically stunning driver.
Features
1.1” Natural Silk Fiber Dome
Titanium Alloy Voice Coil Former
Copper Clad Aluminum Ribbon Wire Voice Coil
Neodymium Motor
Dual Chamber Tuned Rear Cavity
Copper Shorting Ring Design
Laser Etched Back Plate
Gold Plated set Screw Terminals
Smooth Frequency Response From 3kHz – 25kHz
Speaker Size (MM): 28
Watts RMS: 50
Watts Peak: 125
Impedance: S4
VCD (MM): 28
Frequency Response (Hz): 1500 - 25k
Fs (Hz): 675
dBSPL: 91.2
Mounting Diameter (In): 1.6
Mounting Diameter (MM): 40.6
Mounting Depth (In): 0.67
Mounting Depth (MM): 17
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