This is a very rare and desirable pair of the legendary ATC soft dome 75mm midrange drivers. These are the "Super Dome" S-Spec high sensitivity version, with 8 ohm voice coils. Weighing in at nearly 17 lb per unit, with an over-engineered and low distortion motor structure, this is as good as it gets for a direct radiator midrange driver. They available exclusively in large format ATC monitors such as SCM100ASL, SCM300ASL, SCM50ASL and others.
Asking price: $3,000
Located in Los Angeles, or can ship at buyer's expense
Sequential serial numbers: 2815, 2816
I ran the following tests on these drivers:
1. Full impedance sweep via Dayton DATS v3.
DC resistance is 5.514 and 5.532 ohms
2. Smaart phase and magnitude pass-band measurement.
Both drivers within 1dB of each other within their passband and are operating to spec
Driver measured on the floor, with mic on-axis 1 meter above the floor
Unsmoothed and 1/6 traces are posted
Asking price: $3,000
Located in Los Angeles, or can ship at buyer's expense
Sequential serial numbers: 2815, 2816
I ran the following tests on these drivers:
1. Full impedance sweep via Dayton DATS v3.
DC resistance is 5.514 and 5.532 ohms
2. Smaart phase and magnitude pass-band measurement.
Both drivers within 1dB of each other within their passband and are operating to spec
Driver measured on the floor, with mic on-axis 1 meter above the floor
Unsmoothed and 1/6 traces are posted
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