German Maestro SW 6509 woofer-system 6.5" (165 mm).

German Maestro SW 6509 (STATUS series) woofer-system 6.5" (165 mm)

The Add-A-Woofer-System allows you to either add an additional 6.5” woofer to any 2-way system, or upgrade it to a complete 3-way system. 
The SW 6509 crossovers can be connected parallel to the 2-way system and their low-pass output can be used for the additional woofers, 
or you connect them in series before the 2-way system and use the also available high-pass output as input for the 2-way system crossover to cut off the low frequencies.

Additional option for coaxial mounting 
All component systems of STATUS and EPIC line can be easily converted to coaxial-systems and therefore be adjusted for changing installation scenarios. 
Just remove the phase-plug and exchange it with the tweeter mounted on the port attached in the accessory – done.