Marshall JCM800 Modified Guitar Amp Head
Discover the Marshall JCM800 Modified, inspired by the legendary JCM800 that shaped rock and metal. Honouring its iconic status as the amp of choice for bands like AC/DC and The Ramones, this version embraces the rich culture of modded Marshall amps while adding modern features for today's players. This modified iteration of the JCM800 delivers unparalleled tonal flexibility and features a gain boost, mid-boost, and tight switch so you can craft the perfect sound for any genre. From warm, smooth breakups to high-gain roars, capture the classic JCM800 tone with added features designed for the guitarists of today.
Features:
The gain boost switch delivers an extra level of gain and expanded tonal flexibility
The mid-boost switch enhances mid-range frequencies, giving your tone extra warmth, depth, and clarity
The tight switch is expertly designed to cut low frequencies to produce a clearer, more focused sound
Inspired by guitarists, created by Marshall
The JCM800 Modified’s design is a celebration of musicians and gear enthusiasts who customise their amps. We’ve revamped the iconic JCM800 with modern features that help you carve out powerful tones.
Faithfully replicating everything you love about the JCM800
The Marshall JCM800 Modified pays homage to one of the most iconic amps in history, capturing everything guitarists loved about the original JCM800. With enhanced versatility, you have the tools to shape its legendary tone.
Added features
The gain boost switch provides extra gain and tonal flexibility for seamless transitions, while the mid-boost switch enhances mid-range frequencies, adding depth and clarity. The tight switch sharpens your tone by cutting low frequencies, ensuring every note rings out with clarity.
Longstanding commitment to craftsmanship
Skillfully crafted in our Bletchley, England factory, this amp captures the essence of Marshall’s storied legacy while integrating modern features tailored to push sonic boundaries.
Specifications
GENERAL
CHANNELS: Two (with shared EQ controls)
TECHNOLOGY: Valve
ELECTRONICS
Output wattage: 100W
OUTPUTS: SPEAKER OUTPUTS: 2 x 1/4” jack speaker outputs, selectable 16Ω / 8Ω / 4Ω load
VALVES
Preamp valves: 2 x ECC83, 1 x ECC83 (phase splitter), and 4 x EL34
UNIT DIMENSIONS
WEIGHT (KG): 21 kg / 46.3 lbs
WIDTH (MM): 741 mm / 29.2“
HEIGHT (MM): 294 mm / 11.6“
DEPTH (MM): 210 mm / 8.7”
CONTROLS
Controls: Treble, middle, bass, and presence
| Brand | Marshall |
| SKU / MPN | BM5030463630990 |
| GTIN / Barcode | 5030463630990 |
| Condition | Brand new, in original manufacturer packaging |
| Availability | In stock — ready to dispatch |
| Dispatch | 1–2 business days after payment confirmation |
| Delivery | Free tracked shipping Australia-wide, typically 2–7 business days; remote areas may take longer. We ship within Australia only. |
| Returns | 14-day returns — see our Return & Refund Policy. Consumer guarantees under the Australian Consumer Law apply. |
| Warranty | Manufacturer warranty terms vary by brand. If warranty coverage matters for this purchase, contact us before ordering and we will confirm what applies to this item. |