What tubes does the Hiwatt Hwslave200W use?

The Hiwatt Hwslave200W uses 1× ECC83 preamp tubes and 8× EL34 power tubes.

When was the Hiwatt Hwslave200W produced?

The Hiwatt Hwslave200W was produced 1970s.

Hiwatt Hwslave200W preset

Verified · 80/100 confidence. Complete schematic. All component values readable. Parameters derived directly from the circuit.

The Hiwatt 200-watt slave amplifier is a pure power amp designed to be driven by a preamp head. Eight EL34 output tubes produce massive, clean British power for large-scale stage use.

Years produced: 1970s
Made in: UK
Wattage: 200W
Channels: 1
Preamp tubes: 1× ECC83
Power tubes: 8× EL34

Tags: british, clean, vintage, slave-amp, high-wattage.

Schematic-derived preset files for 16 Fractal and Line 6 modelers: Axe-Fx II/XL/XL+, Axe-Fx III, FM3, FM9, and the full Helix family (Floor, LT, Rack, HX Stomp, HX Stomp XL, Native).

Gridleak extracts amp parameters from original circuit schematics using AI vision — component values, gain staging, tone stack topology, tube types — then generates native preset files for every supported modeler. Every extraction is scored 0–100 and the score is published.