Calibration Standard Instruments MDM-4 Mix Down Monitors by E.M. Long

MDM-4 Mix Down Monitors, 1987 vintage by Ed Long's Calibration Standard Instruments of Oakland, CA. 2-6.5 inch woofers with a 3.5 inch mid, Rosewood with aluminum trim. Very Good condition. Price is per pair.

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PLEASE NOTE: The MDM4 woofers have been refoamed, reinstalled swept and tested. Other than the new woofer surrounds these monitors are original as far as we can tell. There have been no crossover or tweeter changes or modifications. The monitors come complete with their original March 9, 1987 test reports and response charts.

SPECIFICATIONS

Response +3db 70Hz to 17Khz (4π steradians, free field)
Response +5db 60Hz to 20Khz (4π steradians, free field)
89 dB SPL 1W/1M. (10 Watts for 97dB per 1000 ft3)
40 Watts continuous, 100 peak below 1 Khz
8Ω nominal, 5Ω minimum
Dual Woofer, 2 way system with Velocity Control HP filter
2 6.5" Woofers
1 3.5" Mid/Hi freq driver
1500 Hz Crossover
.95 ft3 internal volume (27 L)
Dimensions: 19" x 13" x 9.75"
23 pounds.

These speakers come with the original documentation and graphs, along with references to operating them stacked for an additional 6 db acoustic output.

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