Mercury Magnetics Selectable 1, 3, 5, 7 and 9 Henry Multi-Choke for Bob McGilipin's "McMod" to be used with the Holy Terror Amp Upgrade Kit

Excellent for experimenters who would like to listen to multiple choke values.

Instructions are now included with the Holy Terror Amp Upgrade Kit manual.

Taking the addition of a Mini-Choke one step further these photos show a Holy Terror Amp Upgrade Kit with one of Mercury's new MultiChoke installed. The MultiChoke was invented by Mercury engineers to allow amp techs (and savvy amp builders) to easily sample different choke values before selecting the best-sounding choke to install.

The MultiChoke shown in these photos allows for five different Henry values (1, 3, 5, 7 and 9) to be tested. But Mercury also makes other variations, depending upon your need. And we're beginning to see amps that utilize our MultiChokes with rotary switches that allow the values to be changes on the fly! Very cool! We also built a rotary switch demo for the LA Amp Show (see below).

The MultiChoke is installed following the Holy Terror Amp Upgrade Kit manual's supplemental instructions for the "McMod". The only difference is that you must solder a lead from one of the marked MultiChoke terminal values. You can then easily re-solder to each subsequent terminal to test the amp until you've found the optimum sound for your amp. It's really easy to do, and will provide you with extremely informative and usable results. Tweakers love the MultiChoke because it allows them to easily find the right tone for their playing style.

The MultiChoke is sold as a option to the Holy Terror Amp Upgrade Kit, it's inexpensive and you'll be blown away by the results.

As a special demonstration project for the LA Amp Show, we built this MultiChoke version of the "Holy Terror" with a rotary switch that allowed all 5 Henry settings, plus the original resistor from the "Tiny Terror". The tone shifts subtly at each setting, but the most radical tonal improvement occurs with the original resistor pitted against the 9 Henry setting. Indicating that a 9 henry Mini-Choke is the best way to go.

Attention existing Kit owners: If you already own the "Holy Terror" Upgrade Kit, you can purchase the Mini-Choke or the MultiChoke from here with free shipping to the lower 48 States. You'll also receive the installation instructions on CD-ROM.

If you purchase this choke separately it will not come with directions on how to wire it into an amp.

Shipping to the Continental US: FREE

For shipping outside the USA, please inquire us for a shipping quote from the Ask A Question button below.