Sinclair ZX Spectrum +2B

The Sinclair ZX Spectrum +2B was a cost-reduced revision of the black +2A manufactured late in the Spectrum's commercial life. It retained the 128KB memory, built-in cassette recorder, full-travel keyboard and four-ROM firmware arrangement.

Most changes concerned motherboard integration and manufacturing rather than new user features. The model remained in production after the disk-based +3 was withdrawn, serving as the final widely sold tape-based Sinclair Spectrum.

Notable Features

• Cost-reduced motherboard revised the +2A design without changing the main advertised specification.
• Retained the black case and integrated cassette deck.
• Four-ROM firmware supported +3, 128K and 48K environments.

Historical Significance

• One of the final production revisions of the original ZX Spectrum family.
• Continued after the +3 disk model left Amstrad's range.

Collector’s Notes

• External appearance closely matches the +2A, so the rear label and motherboard identify the revision.
• Power and peripheral cautions for the +2A/+3 architecture also apply.

Specifications

Technical Information
Name	Sinclair ZX Spectrum +2B
Manufacturer	Sinclair Research Ltd
Launched	Sunday, January 1, 1989
Country	United Kingdom
CPU	Zilog Z80A at 3.5469 MHz
Units Sold
Operating System	+3 BASIC, 128 BASIC and 48 BASIC compatibility mode
I/O	RF, RGB, cassette audio, two joystick, printer and expansion ports
Keyboard	Integrated full-travel keyboard
Storage	Built-in cassette recorder
Sound	AY-3-8912 three-channel sound plus beeper
Graphics	256 x 192 pixels; 15 colours with two screen banks
Display	32 x 24 characters
ROM	64KB in four 16KB pages
RAM	128KB bank-switched
CPU Speed	3.5469 MHz