HANDWIRED
PMV800 Handwired
Park Master Volume (Cascading Gain, PPIMV)
The handwired Park Master Volume. When Marshall famously linked the Master Volume’s channels the JCM800 was born - this Master Volume circuit would become ubiquitous in rock music through the 70s and 80s and set the benchmark for a generation of high-gain Rock and Metal guitarists. The PMV800 builds on this legendary foundation using high quality handwired components and adding features that allow an even greater range of tonal options to this famous circuit. With a Post-Phase Inverter Master Volume, an effects loop, gain and tonal mods, and high-spec components and transformers, the Park PMV800 is a unique rock machine. The PPIMV (Post-Phase-Inverter Master Volume) allows guitarists to drive the power section harder at lower volumes - this feature is removed from the circuit when turned fully open. A Bright switch has been added to turn off the amps ‘stock’ bright cap to remove unpleasant high end (depending on guitar/pickups), a Mid-Boost for varying levels of thickness, and a three way Gain Switch which offers both lower and higher levels of gain than ‘stock’. Please note that all additional features can be ‘turned off’ or removed from the circuit allowing the PMV800 to return to ‘stock‘ mode for vintage correct feel and response.
FEATURE OVERVIEW
- — First Jim Marshall Amp to have a 'master volume'
- — 800 Series Amp - dominant sound of the 80’s
- — EL34 tubes (Classic British Tone)
- — 45 Watts clean, 65 Watts cranked.
- — Solid state rectifier.
- — High 5 stage filtering.
- — 2 inputs (hi/low)
- — Hi input cascades through 4 gain stages
- — Low input travels through 3 gain stages
- — Pull/Push - bright - adds back ‘original’ bright level
- — Push /Pull - mid boost - adds low mids and bottom end
- — PrePIMV - Cascading Gain Channels simply sound better with PrePIMV - Classic.
The PPIMV (Post-Phase-Inverter Master Volume) allows guitarists to drive the power section harder at lower volumes - this feature is removed from the circuit when turned fully open. A Bright switch has been added to turn off the amps ‘stock’ bright cap to remove unpleasant high end (depending on guitar/pickups), a Mid-Boost for varying levels of thickness, and a three way Gain Switch which offers both lower and higher levels of gain than ‘stock’.
Please note that all additional features can be ‘turned off’ or removed from the circuit allowing the PMV800 to return to ‘stock‘ mode for vintage correct feel and response.
MITCH COLBY'S SIGNATURE MODS (NOW STANDARD)
- — Pull/Push - bright - adds back ‘original’ bright level.
- — Push/Pull - mid boost - adds low mids and bottom end.
The PPIMV is a volume control after the signal is split by the phase inverter tube and just before it goes into the power section (tubes) of the amp. Because the PPIMV comes after the phase inverter tube it benefits from a little more added ‘overdrive’ when compared to the PrePIMV.
A neat trick with the PPIMV is that by cranking it you are essentially ‘taking it out of the circuit completely’ and hearing the amp without a Master Volume which only became available in later models.
A neat trick with the PPIMV is that by cranking it you are essentially ‘taking it out of the circuit completely’ and hearing the amp without a Master Volume which only became available in later models.
