Vintage McIntosh MT150-1 // Midrange/Tweeter Driver 036-016

Fully functional, taken from an ML-1C. An equivalent replacement is not available, making this the only way to restore the early McIntosh speakers which used them.

SPECS

Type   1.5" dome

Dome   1-1/2" soft dome (Phenolic impregnated cotton)

Magnet   1.5" x 1", AlNiCo

Part Number   036-016

Patent No   3,328,537

Compatibility   ML-1C, ML-2C, ML-2M, ML-4C, and ML-4M

Dimensions   3"W x 4"H x 2"H (including dome)

Weight   2 lbs.

LINER NOTES

In assembling the driver, a rubber sink type washer and a cup shaped paper gasket are slid down on the magnet before gluing it into the magnet structure. Metal shims are then slid up into place in the gap between the pole piece and the front plate. A fiberglass pad is placed inside the hollow soft dome and the dome/coil assembly is cemented in place. After drying, the shims are removed. The paper gasket and washer are then slid up into place to form a small cavity behind the voice coil. They are then coated with adhesive to give a complete seal. The domes and surrounds are then treated by painting butyl rubber dissolved in toluene to seal the holes or interstices in the cotton. The speaker is then magnetized.