QUATTRO mkII is the updated version of the original QUATTRO based on the JA-8008 HES driver (now discontinued).
It is now updated with the new JA-8008 HMQ driver. There were only a few changes to the crossover and only to the low-pass section of the bass driver.
With the new JA8008-HMQ driver the performance is further increased by a more tight bass and enhanced midrange transparency.
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