Magnepan MG 2.6R
Beschrijving / Description
Although it looks rather different, the 2.6 is basically similar to the MG2.5/R that J. Gordon Holt and I reviewed in Stereophile some three years ago. In fact, the ribbon unit is identical but the speaker's crossover has been extensively revised to give a higher sensitivity coupled with a warmer tonal balance. The crossover between the two drivers operates at approximately 1kHz; whereas the 2.5 used first-order electrical slopes, those in the 2.6 are second-order high-pass for the tweeter, which appears to be connected with inverted polarity, and third-order low-pass to the woofer/midrange. The crossover utilizes three air-core inductors (footnote 1), two paralleled plastic-film capacitors in series with the ribbon, and one non-polarized electrolytic capacitor shunting the woofer feed, these components somewhat untidily glued to the rear of the speaker's frame to the left of the input terminals. These are 4mm sockets with a locking hex-head screw. A second pair of 4mm sockets holds a shorting bar which can be replaced by a low-value power resistor to attenuate the ribbon output if desired. The somewhat fragile ribbon (fragile, that is, with respect to a typical moving-coil dome tweeter) is also protected against overload by a series 2.5A fuse.
Specificaties / Specifications
Two-way floor-standing planar loudspeaker.
Drive-units: 40"-long, ¼"-wide ribbon tweeter,
"Magneplanar" midrange/woofer measuring approximately 58" by 10.5"
(609in2 area).
Crossover frequency: approximately 1kHz.
Frequency response: 37Hz-40kHz +/-3dB.
Nominal impedance: 4 ohms (3 ohms minimum).
Sensitivity: 87dB/W/m.
Recommended minimum amplifier power: 50W.
Dimensions: 71.5" H (including feet) by 22" W by 2" D.
Weight: 50 lb.