Lot · Preamps & Channel Strips
Vintage RCA Portable Amplifier OP-6 Microphone Preamp
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Fri · Jul 3, 2026
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For parts or not working
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ZIP 544**
gracethrufaith
31 ratings · 100.00% positive
Description
From the sellerThe RCA OP-6 is a legendary, "Holy Grail" tube microphone preamplifier originally introduced in the 1930s. Circuitry: It typically utilized three 1620 (or 6J7) pentode tubes. It is famously known for its "almost endless" gain (often cited at 90dB) and headroom, which contributed to a legendary, thick, and rich tone.
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