MARSHALL EXTERNAL HIGH-GAIN MOD

The Legendary MetalHead High-Gain Mod, Now External and Removable

The Marshall External High-Gain Mod by Elan Memran brings the original MetalHead sound to your amplifier without permanently modifying your Marshall.

EXTERNAL • REMOVABLE • NO DRILLING • NO PERMANENT SOLDERING

METALHEAD BETA TESTING PROGRAM

LIMITED TO THE FIRST 10 BETA TESTERS

This is a fully working product.

Before the full release, we are offering 10 units to Marshall players to try the MetalHead External Mod on their own amplifiers and send us their comments and feedback.

BETA TESTER PRICE

$399

Regular Price: $699

ONLY 10 UNITS AVAILABLE AT THE $399 BETA TESTER PRICE

MARSHALL EXTERNAL HIGH-GAIN MOD: TURN YOUR MARSHALL INTO A METALHEAD

Designed by Elan Memran of MetalHead Electronics, the Marshall External High-Gain Mod brings the original MetalHead high-gain circuit to your Marshall without permanently modifying the amplifier.

The system connects through the amplifier’s preamp tube sockets using a model-specific adapter and a compact external control box.

Get powerful MetalHead high-gain tone and control while keeping your Marshall original.

The system can be removed and the original tubes reinstalled to return the amplifier to its original configuration.

FEATURES

• External and removable
• No drilling
• No permanent soldering
• Preserves the original amplifier circuitry
• Original MetalHead high-gain circuit
• Built-in MetalHead noise gate
• Volume 1
• Volume 2
• Master Volume
• Model-specific versions for compatible Marshall amplifiers

HOW DOES THE MOD WORK?

Depending on the Marshall model, one or two preamp tubes are removed from the amplifier.

The supplied MetalHead adapter connects through the corresponding tube sockets and connects the amplifier to the external MetalHead circuitry.

The required original preamp stages are bypassed and replaced by the external MetalHead circuit.

The system is removable. The original tubes can be reinstalled to return the amplifier to its original configuration.

TONE AND CONTROL

The Marshall External High-Gain Mod gives you two controllable gain stages, a Master Volume, and the built-in MetalHead noise gate.

On supported models, the system can switch between a classic JCM800-style circuit and the MetalHead modified high-gain circuit.

The result is a wide range of Marshall tube tones, from classic overdrive to aggressive MetalHead high gain.

COMPATIBLE MARSHALL AMPLIFIERS

The MetalHead External Mod is designed in model-specific versions. Models being supported or considered for development include:

• Origin
• JTM45
• JCM800
• 2204
• JMP
• Plexi / Super Lead
• JCM900
• JVM
• JVM1
• 2550 Silver Jubilee
• JTM100 / Lead Tremolo 100W / 1959T
• SV20

Important: Availability and compatibility must be confirmed for your exact amplifier model before ordering.

Tube socket connections and configurations vary depending on the Marshall model.

WHAT WE ASK FROM OUR BETA TESTERS

We want you to use the MetalHead External Marshall Mod with your own amplifier in real-world playing conditions.

Try it, play through it, and tell us about your experience with installation, operation, compatibility, and tone.

We also want to hear your comments, suggestions, and anything you think could make the system better.

BETA TESTER UPGRADE GUARANTEE

If improvements or design changes are made as a result of the Beta Testing Program, Beta Testers will be eligible to receive the improved unit at no additional product cost.

To receive the improved unit, the original Beta unit must be returned to MetalHead Electronics.

Shipping terms: The Beta Tester pays the shipping cost to return the original unit to MetalHead Electronics. MetalHead Electronics pays the shipping cost to send the improved replacement unit back to the Beta Tester.

You will not have to purchase the improved unit again.

THE METALHEAD SOUND

The Marshall External High-Gain Mod is based on the high-gain Marshall modifications I developed at MetalHead Electronics.

MetalHead-modified Marshalls have been used by professional guitar players, including Dino Cazares of Fear Factory, who used my modified Marshall on early Fear Factory recordings.

The Marshall External High-Gain Mod brings that high-gain circuit into an external, removable system for compatible Marshall amplifiers.

IMPORTANT SAFETY INFORMATION

Tube amplifiers contain potentially lethal high voltages, even after they have been switched off.

The MetalHead External Marshall Mod does not require opening the amplifier chassis. Never open or service the amplifier chassis unless you are qualified to work on high-voltage tube equipment.

Always switch off the amplifier, disconnect it from the power outlet, and follow the supplied installation instructions before connecting or removing the system. Never connect or disconnect the adapter while the amplifier is powered.

Manufacturer warranty terms vary. Check your amplifier manufacturer’s warranty conditions regarding aftermarket equipment.

MORE METALHEAD MODIFICATIONS AND ELAN EQUIPMENT

Learn about my original internal MetalHead gain modification or see all available upgrades in the Marshall Modifications Catalog.

More equipment by Elan Memran:
Elan Amps |
Elan Audio Lab |
Elan Studio Gear.

JOIN THE METALHEAD BETA TESTING PROGRAM

Limited to the First 10 Beta Testers

Beta Tester Price: $399

Regular Price: $699