The E-mu ESI-4000 is a classic rackmount digital sampler known for its professional sound quality, extensive features, and powerful filters. Produced between 1998 and 2000, it was the final model in the ESI series and a popular choice for budget-conscious producers. Key Features and SpecificationsThe ESI-4000 offers a robust set of features for sampling and sound manipulation. 

• Polyphony: It features 64-voice polyphony (32-note stereo), allowing for complex sound layering.
• Memory: The standard unit came with 4MB of RAM, which is expandable up to 128MB using standard 72-pin SIMMs.
• Filters: A major highlight is its 64 digital 6-pole filters, offering 19 different filter types, which are praised for their sound quality.
• Connectivity: It includes a built-in SCSI port for connecting to external storage like CD-ROMs or hard drives, as well as MIDI In/Out/Thru ports and multiple analogue audio outputs.
• Editing Tools: Onboard DSP capabilities include time compression/expansion, parametric EQ, normalization, cross-fade looping, and more.
  
  This unit is in very good condition and was used in a smoke free home studio. IT comes with the original manual