Marshall JMP-1 Valve MIDI Guitar Preamp Rackmount Tube Preamp w/ Speaker Out

Marshall JMP-1 Valve MIDI Guitar Preamp – Rackmount Tube Classic

Offered here is a Marshall JMP-1, one of the most iconic rackmount guitar preamps ever produced. Combining genuine Marshall tube tone with full MIDI programmability, the JMP-1 became a staple in professional touring and recording rigs throughout the 1990s and remains highly sought after by guitarists today.

Powered by a pair of ECC83/12AX7 tubes, the JMP-1 delivers four distinct channels covering everything from pristine cleans to classic British crunch and high-gain lead tones:

• Clean 1 – Warm, full-bodied clean tones with excellent headroom.
• Clean 2 – Bright, articulate cleans inspired by the legendary JTM45.
• OD1 – Classic Marshall crunch with rich harmonics and smooth saturation.
• OD2 – High-gain lead channel with tight low end, sustain, and modern aggression.

Designed for maximum flexibility, the JMP-1 features full MIDI In, Out, and Thru connectivity, allowing instant preset recall and seamless integration into complex rack systems. A programmable stereo effects loop, stereo line outputs, and speaker-emulated outputs make it equally at home on stage, in the studio, or as the heart of a modern recording setup.

Features

• Marshall JMP-1 Valve MIDI Guitar Preamp
• Genuine Tube (ECC83/12AX7) Preamp Design
• Four Fully Programmable Channels
• Classic Marshall Clean & Overdrive Tones
• Full MIDI In / Out / Thru
• Programmable Stereo Effects Loop
• Stereo Line Outputs
• Speaker-Emulated Outputs
• 1U Rackmount Chassis

Condition

This unit is previously owned and shows cosmetic wear consistent with normal use. It has been tested and is fully operational, functioning exactly as intended.

Please review all photos for the exact cosmetic condition.

A legendary Marshall rack preamp that continues to be a favorite among guitarists seeking authentic valve tone, MIDI convenience, and professional rackmount versatility.

• At Tone House, we're not just sellers, we're passionate musicians, gear aficionados, and seasoned professionals dedicated to the craft of making music. We take pride in our curated music collection. We love giving these vintage and rare pieces new life through maintenance and upkeep. Our goal is for these units to be at their optimal performance before going to their new homes.  Every item you acquire from us undergoes a meticulous inspection process conducted by our team of enthusiasts, studio engineers, and live performers. With full-time technicians on staff, rest assured that each piece is thoroughly examined and tested before being professionally packed.

All orders placed by 2 pm are processed the same day. This ensures that your gear is swiftly prepared for shipment, guaranteeing prompt delivery in the condition promised. Once your order is in transit, automatic tracking information is provided, allowing you to monitor its journey from our shop to your doorstep with ease.

The units/items you see in our pictures are precisely what you'll receive. Have questions? Feel free to ask before making a purchase. Additionally, we offer custom modifications, within reason, to many of the guitars and products we sell, ensuring they perfectly suit your unique requirements.

Our dedication to your satisfaction doesn't end with the purchase. We value your feedback and strive for excellence in every transaction. If, for any reason, you're not completely satisfied, please reach out to us before leaving feedback. Your happiness is our priority, and we're here to ensure your musical journey is nothing short of exceptional.

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Please note that additional shipping charges may apply to buyers in Hawaii, Alaska, Puerto Rico, and the Virgin Islands. Feel free to contact us for shipping rates before making your purchase.

For Returns: Your satisfaction is our priority. If for any reason you're not completely satisfied with your purchase, please don't hesitate to reach out to us via message. We're here to address any concerns and ensure you have a positive experience with Tone House.

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