This successor of the famous Amiga 500 was introduced in 1991. Amiga 600 was mainly a minor technical update, there weren't any groundbreaking improvements between the two models. A600 was manufactured using surface mount technology which made it cheaper for Commodore to produce. A600 was also the first Amiga with an IDE controller and a PCMCIA card slot and RF and composite video outputs were also added so the bulky RF modulator wasn't needed anymore. The computer was designed to be a cheap games machine for everyone but did not receive as much attention as Commodore had expected it to. Sad but true, the Amiga reign was beginning to crumble.

Technical details:

CPU: Motorola MC68000 running at 7.14 Mhz
Math coprocessor (FPU): None
Real-Time Clock: None
Chip set: Enhanced Chip Set
Chip RAM: 1 MB, upgradable to 2 MB
Fast RAM: None
Floppy drive: Internal 3.5 inch Chinon 880k DD floppy drive
Hard drive: Optional
Hard drive controller: Internal 44 pin AT/IDE interface
Interfaces: RS232 serial, parallel, disk drive, 2 mouse/joystick ports
Video output: RF modulated NTSC or PAL for direct connection to a television tuned to VHF channel 3 or 4, composite NTSC or PAL for connection to a video monitor, VCR, camcorder, or video capture device, 23 pin connector for RGB (analog/digital) with adapters for 9 and 15 pin DIN connectors
Horizontal refresh rates: 15.6 kHz - 31.5 kHz
Vertical refresh rates: 50 Hz - 73 Hz
320x200, 320x400 (interlaced) with 2-32 colors, also special (read "limited") Extra HalfBrite (32 colors) and HAM6 (4096 colors) modes
640x200, 640x400 (interlaced) with 2-16 colors
400x300, 800x600 (interlaced), 800x300, 800x600 (interlaced), 640x480, 640x960 (interlaced), 1280x200, 1280x400(interlaced), all with 4 colors
(techniques to bypass the resolution and color limits do exist, for example the DynamicHires)
Text modes: 60 x 32 and 80 x 32
Audio output: 4 channel stereo 8 bit sound, RCA stereo audio jacks
Expansion slots: Internal card edge connector for RTC connection, additional 1 MB of chip RAM or a CPU update. One PCMCIA Type 2 slot
Drive bays: One internal 2.5" hard drive bay
Case type: Single case with motherboard, disk drive, keyboard (without numeric keypad) and expansion slots in a case roughly the size of a thick PC keyboard. The power source is external.
OS Version: AmigaDOS 2.04 or 2.05 with Workbench 2.1

Sources of information:
Spock's Logical Amiga Page
Computing Museum