Mark Cameron and Dave Friedman both built reputations on hot-rodded Marshalls in the 90s and 2000s. Their work is often *grouped with* Jose's but the topology is different in important ways:
- Cameron typically uses asymmetric diode clipping (mismatched zener pairs or zener+silicon), additional gain stages beyond the V0 trick, and his own coupling-cap voicing schedule. Cameron amps are denser and tighter than Jose amps.
- Friedman ships post-Jose voicing with plate-snubber caps (330pF over the 100k plate loads) and a slightly different NFB approach. His "Brown Eye" channel is a Jose-derived but post-2000s reinterpretation.
Neither is "wrong" — they're adjacent traditions that share Jose's general direction (preamp-dominant distortion via cascaded gain + diode clipping + reduced NFB) but diverge on specifics. JMIL's roadmap panel surfaces these as Tier 3 (commonly-lumped-in) rather than Tier 1 to keep the attribution honest.
Cameron — extended detail (per Friedman, Amp Panels #1 + #9, 2025): - Presence circuit universally 0.68µF / 5kΩ — Cameron exclusively uses the later-70s presence variant (vs Jose's roughly 50/50 split between 0.1µF / 5K1 and 0.68µF / 5K — see two-jose-variants). - Side-mounted chassis controls — Cameron is known for adding extra-channel controls on the chassis side rather than top/back panel, a distinctive physical build signature. - Touched Langner amps — Friedman recalls a Langner amp that "Dave [Friedman] had worked on and actually Cameron had modded too" ([Panel #1 107:56]). Documents serial-modder overlap. - Hot bias on some 40W / 50W amps — Cameron is the documented exception to the "bias-hot myth" framing in bias-hot-myth; Friedman concedes Cameron biased some amps "hot-40s, hot-50s" for a specific Cameron-school crunch character ([Panel #9 160:40]). Situational, not universal. - Cameron was reportedly Brian May's amp tech at one point (Marshall Modification Project, Dec 2025) — though Friedman hedges this as "that's what I heard."