Have you tried Audio Research Corporation. www.audioresearch.com There phone number is 763-577-9700. Another possibility is Lenbrook Industries, phone# 781-784-8586. They did a v.4 upgrade on my ARC Ref. 1.
Hey Rosstaman, can you tell me more about Lenbrook Industries? Are they aftermarket modification specialists? I am thinking about purchasing an used REF 1 from a friend here, and would like to get the infiti cap upgrade. You mentioned the v.4 upgrade. Are there different upgrade options?
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