In 1987, the sound of rock changed forever. It was raw, unapologetic, and drenched in attitude. Tim Caswell’s infamous #39 mod turned a standard Marshall into a snarling, harmonically rich beast, and with it provided a tone that fueled a generation of guitar heroes and defined an era when rock truly ruled the airwaves.
Now that legacy returns.
The Caswell 1987 Mod captures the heart and soul of that groundbreaking circuit with the aggressive gain structure, sensitivity, and harmonic fire that made #39 a legend. Built on the foundation of our acclaimed Hot Mod V2, the Caswell 1987 Mod refines the formula for today’s player while staying true to the original spirit of late-’80s excess and sonic dominance.
Expect explosive punch, glassy upper harmonics, and that unmistakable “LA Strip” grind that jumps out of the mix. Whether you’re chasing the tone of your idols or forging your own signature voice, the Caswell 1987 Mod delivers the elusive mix of clarity and chaos. It’s the sound of 1987, reborn.
Features
Thump Switch – Engage the Thump switch and unleash a massive low-end response that hits like a freight train. It adds deep, percussive punch and body to your tone, giving palm-muted riffs and power chords that unmistakable ’80s arena impact.
Bite Switch – Flip the Bite switch to ignite upper-midrange harmonics and enhance note definition and presence. This feature adds edge and articulation, letting solos cut through with searing clarity and that classic LA studio sizzle.
Drive Control – The Drive pot gives you total command of the added gain stage. From tight, classic crunch to full-blown, saturated lead tones, the Drive control lets you dial in your perfect level of aggression and sustain.
Two Versions. One Legacy. Choose Your Caswell 1987 Mod.
Standard Edition – $349
Pure attitude, no compromises. The standard Caswell 1987 Mod brings the raw, high-voltage aggression and spirit of the legendary #39 circuit straight to your amp. Built with premium components and tuned for punch, clarity, and harmonic richness: this is the sound of 1987 reborn and ready to roar.
Limited Edition – $479
For players and collectors who demand something truly special. The Limited Edition Caswell 1987 Mod stands apart with striking blue-on-black aluminum hardware and knob, loaded with rare, genuine NOS ’80s USA-military grade Philips tubes (12AT7 and 12AX7), and includes a hand-signed Certificate of Authenticity from Tim Caswell himself. Only 50 units are being produced worldwide – each one a piece of rock history. Built to order in Standard or Reverse wire versions.
Important: See this page first to view the full list of compatibility so you know which version (standard or reverse-wired) to choose before placing your order. Certain amps will require socket extenders (e.g. Mesa Badlander, Marshall DSL, etc.) and we now include the socket extender with all orders.
ORDERS FOR USA:
Caswell 1987 Mod $349 + $8.60 S/H.
Blue on Silver. Orders will ship December 2025. When your unit is ready, you will be emailed a tracking number (shipping is via USPS). Thank you for your business and patience!
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ORDERS FOR INTERNATIONAL SHIPMENTS OUTSIDE OF THE USA
$349 + $65.50 shipping. Use the button below to select your Caswell 1987 Mod for locations worldwide outside of the US. Shipments are USPS Priority Mail and you will be providing with tracking for your shipment.
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LIMITED EDITION – ORDERS FOR INTERNATIONAL SHIPMENTS OUTSIDE OF THE USA
$479+ $65.50 shipping. Use the button below to select your Limited Edition Caswell 1987 Mod for locations worldwide outside of the US. Shipments are USPS Priority Mail and you will be providing with tracking for your shipment.