Macintosh Quadra 660AV

The Macintosh Quadra 660AV was part of Apple Computer's Quadra series of Macintosh desktop systems. The Quadra 660AV was introduced on October 1, 1993 along with the Quadra 610 and 650, replacing the Macintosh Centris 660AV. The Quadra 660AV was superseded by the Power Macintosh 6100/60AV on March 14, 1994 and discontinued on September 12, 1994.

Specifications
The specs of the Quadra 660AV are completely identical to the Centris 660AV, differing by exterior markings on the case. It externally resembles a Quadra 610, but also includes an AT&T 3210 digital signal processor, in and out,  in and out, and a GeoPort in place of a RS-422 modem port on the back.
 * 25 MHz Motorola 68040
 * 4, 8, 16, or 32 MB of 70ns RAM (4MB soldered to board, and two 72-pin SIMM slots, up to 68 MB maximum)
 * 1 MB of VRAM (up to 16-bit color at 832 x 624, or 8-bit color at 1152 x 870)
 * 80 to 500 MB SCSI hard drive