>ElectroSuite.com>> – Audio Research LS22 Preamplifier. The Audio Research Corporation LS22 Line Stage Preamplifier was chosen for this upgrade project because it has a lot of features and a lot of potential.
Audio Research LS22 Preamplifier
Here is the list of upgrades that will be performed in stages to gauge the effect of each one on the overall sonic performance. Parts sources are listed below.
♪ Replace the eight Sovtek 6922 tubes with NOS Tesla 7DJ8.
♪ Install EAR Isodamp feet.
♪ Replace the 5uF audio path capacitors with Auricaps.
♪ Replace two interstage 5uF audio path capacitors with 1uF Aura-T Teflon caps.
♪ Replace some power supply capacitors with Auricaps.
♪ Replace the power supply rectifiers with Fairchild FFP08S60STU Stealth II diodes.
♪ Install Pearl Tube Coolers on the eight tubes.
♪ Install PS Audio‘s Critical Link cryogenically treated, gold plated, copper element fuses.
♪ Replace the power cord with an Audience PowerChord “e” power cord.
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