Emu appreciated that not everyone could afford a £5000 ($7,000) sampler or even needed 128 voices or a potential 128 megabyte memory, so a cut down Emulator IV was launched based upon the EOS. This was the e64 and as the name suggests, this unit had 64 voices and could only expand to 64 megabytes. It was quite a bit cheaper than an E-IV but was, for some, a false economy as the e64 was not upgradeable once it left the factory (memory excepted, which was limited to 64 megabytes). To get around this Emu released the e6400 which could be upgraded to full E-IV status.