These units have been upgraded by John Sampson of JS Audio, former Musical Fidelity engineer, who specialises in upgrades for Musical Fidelity products.
Amp upgrade: A full set of up-rated electrolytic capacitors and modification of the output stage from one to two pairs of transistors, for higher current output and refinement.
Improved internal cabling to the speaker terminals.
CD upgrade: Full set of up-rated electrolytic capacitors, op amps and cabling. Mechanism serviced, including new laser pickup.