The CHR-70A (Gen. 3)  is now up-dated 4 times since the first model was launched 4 years ago. Its usable
frequency range is class leading. Depending on enclosure design, its capable of operation from 40Hz to 25-kHz.
2 developments further improve the design. An excursion limiter (arrestor) has now been fitted inside the motor
sub-assembly, significantly reducing the risk of over-driving damage. The CHR is now capable of being driven at
higher loads making it suitable for more audio applications. Colour coded custom locking connectors are now
included in this design. Both these features are illustrated in the following page.
The driver has medium efficiency of 85.5dB at 8 Ohms making it easy to use on nearly all small to medium power
amplifiers. 
Many technical improvements has been done.
1 - Improved stiffer frame.
2 - New cap design with new improved fitting method.
3 - New Japanese deigned coil.
4 - New spider for improved bass.
5 - 2 colour choice (champagne gold and  and brush look metal cones)
6 - Built-in overload protection (arrestor in motor sub-assembly)
7 - Dedicated custom colour coded connectors
The new CHR-70 Gen. 3  is an excellent  high-end and multi-purpose driver. Its also suitable for many computer,
Home Theatre, TV, and commercial A/V applications.

CHR-70 Gen.3 Data
REVC     7.2 Ohm
Fo     65.40 Hz
Sd     5.02 K mm/2
Vas     5.17 Ltrs
Cms     1.44 uM/N
Mmd     3.90 g
Mms     4.10 g
BL     4.20 T*M
Qms     2.66
Qes     0.69
Qts     0.55
Levc     32.44 uH
No     0.20%
Spl     85.4 dB
Pwr     20w Nom.
X max     4.3-mm 1 way
Coil Dia     20-mm
Main tolerance     +/- 2.5 hz on mean Fo