Audio Research
SP-3
Introduced 1972$595 MSRP
William Zane Johnson's landmark early-70s tube preamplifier that helped launch the American high-end; prized by collectors, especially in SP-3a-1 form.
MSRP
$595
Used market · Good
$1,800est.
+203% vs MSRP
as of Aug 15, 2026MSRP to used market
From $595 at launch to $1,800 today (estimated).
Specifications
- Type
- tube preamp with MM phono
- Inputs
- phono x2, tuner, aux, tape
- Outputs
- main out, tape out
- Topology
- 12AX7 x6
Active listings (0)
No active listings for this component right now.
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