ZX Spectrum+

Released in October 1984, the Sinclair ZX Spectrum+ was an updated version of the original Spectrum 48K, featuring a redesigned case with a full-size plastic keyboard. Internally, it retained the same Z80-based architecture and memory configurations as the original 16K/48K models, but aimed to address criticisms of the original's rubber keyboard. Designed to appeal to users needing a more professional-looking machine, the Spectrum+ was also intended to compete with the BBC Micro and Commodore 64 in schools and homes. While technically identical under the hood, the Spectrum+ helped extend the life of the platform until the Amstrad acquisition in 1986.

Notable Features

• First major physical redesign of the Spectrum line
• Improved keyboard made it more viable for productivity and education
• Retained full compatibility with 48K software and peripherals
• Still lacked internal sound or joystick ports (unlike later Amstrad models)
• Keyboard featured printed BASIC keywords, removing the need for shortcut keys

Historical Significance

• Released during Sinclair's peak but faced stiff competition from C64 and BBC Micro
• Helped reposition the Spectrum as a "serious" computer while retaining affordability
• Succeeded by the Spectrum 128, which introduced improved audio and memory mapping
• Became popular in schools and homes seeking a more professional alternative to the rubber-key Spectrum

Collector's Notes

• Rarity: Moderate – more common than early ZX models, but boxed units with PSU and manuals are collectible
• Desirability: High among Spectrum enthusiasts; a good “daily use” Spectrum
• Common Issues:
  • Keyboards sometimes suffer from key bounce or wear
  • Expansion connector and ULA chips can fail over time
  • Internals are otherwise nearly identical to ZX Spectrum Issue 6 boards

Specifications

Technical Information
Name	ZX Spectrum+
Manufacturer	Sinclair Research Ltd
Launched	Monday, October 1, 1984
Discontinued	1/1/1986
Country	United Kingdom
CPU	Z80A
Power	9V DC (external PSU, unchanged from Spectrum 48K)
Expansion	Edge connector, same as original Spectrum
Storage	Cassette tape (1200 baud), via 3.5mm jack, Microdrive, Floppy Drives
Keyboard	58-key full-size plastic keyboard (mechanical feel)
Sound	1-bit beeper (same as Spectrum 48K)
Display	256×192 pixels, 15 colors (via attribute system)
ROM	16 KB (BASIC and OS routines)
RAM	48 KB
Units Sold	500,000