Sinclair ZX Spectrum +3
The ZX Spectrum +3 is very similar to the ZX Spectrum +2, but has a built-in 3" floppy drive (like the Amstrad CPC 6128) instead of the tape drive and is housed in a black housing. It was launched in 1987, initially sold at £249 and later £199 and was the only Sinclar ZX Spectrum capable of running the CP/M operating system without additional hardware.
The machine was quite a major redesign over the +2, with new ports added or modified. Probably the biggest difference was at the back of the machine, which now had an all-new interface port for a printer and also the allowance for a second disk drive.
Almost all +3 machines have a sound error due to a part of the board being omitted, causing the sound to be distorted and clipped.
The only models that don't have the problem contain the 270835 motherboard and seem to only appear in Spain.
The Spectrum +3 is considered the ultimate Spectrum model and has all the good points of the previous spectrum machines: 128k, full-stroke keyboard, 3'' built-in disk, 128k Basic, RAM disk, many interfaces... But unfortunately it was it launched too late and the price was too high (a game on floppy disk was on average 5 pounds more expensive), at a time when the ST and the Amiga were already fighting on the shelves. So the machine is not a success.
It is the last official Sinclair Spectrum model ever made. The +2A and +2B models were launched a little later, but were only a revision of the +2 model already on the market.