Tweeters don't like prefixed, swinging horns and answer this with a nonlinear frequency response and a early decrease to the high frequencies - notably under listening angle. 

They don't even like to be placed at the side of their big brother, showing various nonlinear frequency resonses under variuos listening angles.

The consequent solution to all this problems is the  inverted woofer cone. Hard to handle in construction and manufacturing of the driver itself, but therefore just easy to handle in loudspeaker construction.

This unit, constructed and manufactured perfectly to this mission, will be the heart of your next loudspeaker.

Woofer:

SD:

about 135 cm³, 18cm, 7"

fs:

fs about 33 Hz       

Qts:

Qts about 0,33

VAS:

VAS about 30 l

X lin:

X lin: +/- 6,0 mm

X max:

X max: +/- 11,0 mm

Korb:

Aluminium die cast, flow optimized

Cone:

Sandwich

Surround:

Multiwave rubber, flow optimized

Motor:

Double Neodymium, Underhung, CCAW on fiber carrier

  Tweeter:

SD:

about 7,0 cm² (VC 28,0 mm)

fs:

fs about 770 Hz

Housing:

Die cast aluminium

Dome:

Cloth

Motor:

Double Neodymium, Underhung, CCAW on aluminium  carrier

Ferrofluid:

No

Damping:

Felt, cotton wool

Volume:

Various ventilation openings

Mounting:

Screwed on woofer motor

Common specs:

Diameter total 190 mm / 7,5"

Gold plated screw on terminals for woofer and tweeter

Suitable enclosures: From 8 l / 0.28 ft³ closed to 25 l / 0,9 ft³ reflex

Frequency response (depends on enclosure): 30-30.000 Hz