Eggleston Works Isabel (Black Sparkle)

This is the famed Dynaudio Esotar used in other speaker models, including those from EgglestonWorks, and known as being one of the costliest tweeters available.

The Morel woofer is a 6″ polypropylene, double-magnet driver with a 3″ voice coil.

This driver is run full range and loaded in a single aperiodic, vented box.

The crossover point is 3.5k.

Internal goodies include Transparent wire, Hovland Musicaps, and Vishay resistors.

Claimed frequency response is from -3dB at 60Hz to well beyond 24kHz.

Stated efficiency is 87dB, with an impedance of 8 ohms nominal, 6.3 ohms minimum.