Hayes, United Kingdom
About this listing
Marshall JMP Super Bass 100W Model 1992 – Original Dagnall Transformers – Fully ServicedA fantastic example of a 1978 Marshall JMP Super Bass 100, presented in very good vintage condition and retaining its original Dagnall mains and output transformers, along with its original Drake choke.Manufactured during Marshall's legendary JMP era, this is a great example of the iconic 100-watt Super Bass, renowned for its enormous headroom, thick low-end response and rich, dynamic valve tone.This particular amplifier carries serial number SB/A 05809K, with its original inspection label dated 28th June 1978, confirming its year of manufacture.Importantly, the amplifier retains all three of its original transformers, including the desirable Dagnall T4074 mains transformer, Dagnall C2668 output transformer and Drake T100 choke.Recently serviced by Dave Wittering of Prestige Amp Servicing, a former senior Marshall service engineer with 15 years at the Marshall factory and over 35 years of experience, the amplifier has been carefully maintained with reliability and safety in mind, while preserving its vintage character.SpecificationsManufacturer: Marshall AmplificationModel: JMP Super Bass 100 – Model 1992Year: 1978Serial Number: SB/A 05809KInspection Date: 28th June 1978Country of Manufacture: EnglandOutput: 100 WattsChannels: Two channels, four inputsCircuit: All-valve, non-master-volumeMains Transformer: Original Dagnall T4074Output Transformer: Original Dagnall C2668Choke: Original Drake T100Power Valves: Matched quad of JJ EL34LRectification: Solid-stateRecent Service & MaintenanceThe amplifier has recently undergone a comprehensive service by Dave Wittering of Prestige Amp Servicing, ensuring it is ready for regular use.Work carried out includes:All input and output sockets replaced with OEM Cliff jacks.All potentiometers replaced.V1 cathode bypass capacitor replaced.Bias circuit smoothing capacitors replaced.Mains IEC socket replaced for improved electrical safety.Dedicated chassis earth connection installed for improved safety.Fitted with a matching quad of JJ EL34L output valves.All replacement components used during servicing are genuine Marshall OEM parts wherever possible, maintaining the amplifier's original specification and character.Crucially, the original Dagnall transformers and Drake choke remain in place.ConditionThe amplifier is in very good vintage condition, particularly considering it is approaching 50 years old.The original-style black covering displays some minor snags, scuffs and small dings consistent with age and use, but nothing that detracts significantly from its overall appearance.The Marshall front logo has been replaced, and the amplifier presents very well overall.Internally, the amplifier has benefited from professional servicing, with sympathetic component replacements carried out where necessary to ensure continued reliability and safe operation.Tone & PerformanceThe Marshall Super Bass is one of the great classic British valve amplifiers, sharing much of its DNA with the legendary 100-watt Super Lead but offering a slightly warmer, fuller and more rounded response.Originally designed for bass guitar, the Super Bass quickly became a favourite among guitarists seeking enormous clean headroom, rich harmonic overdrive and a powerful, dynamic response.Compared with the Super Lead, the Super Bass typically offers a thicker low end, smoother high frequencies and a wonderfully open midrange.When pushed, the amplifier delivers a huge, organic overdrive with exceptional note definition, rich harmonics and the unmistakable character of a vintage Marshall JMP.An outstanding choice for both guitar and bass players looking for authentic late-1970s Marshall tone.Worldwide ShippingWe offer worldwide shipping on all our amplifiers.Every amplifier is carefully packaged using custom-made, heavy-duty shipping cartons, with particular attention paid to protecting delicate components during transit.We regularly ship vintage amplifiers throughout the UK, Europe, North America and beyond.All shipments are fully tracked and insured.Overdrive Guitars – Vintage & Modern Amplifier Specialists | Authorised Marshall Retailer
Price£2,299
+ £19.99 Shipping
