| The original Walsh 5 drivers can be upgraded to the Mk-2 Series. The main driver is upgraded, including changing to our new foam surround projected to last up to 30 years. We also replace the vent with a new vented, soft metal dome super-tweeter. The new driver comes with a vent adapter and the two together extend the bass response down to 20 Hz. The new super-tweeter can handle greater dynamic range and has wider dispersion. |
