Treble – This control adjusts the amount of focus on the highs in the pedal. In conjunction with the other EQ controls, you can have a sound that's more reminsicent of this or that classic Black Panel amp, depending on how much highs you dial in. If you're thinking "siamese" crank the Treble; for a sound more like an old bass amp that guitarists got their hands on and loved, keep it back a little bit but still above noon. If you're after a fancy sound (maybe even a deluxe tone?), roll it back farther. The ability to morph between these different types of sounds continues with all the Black '65 OD's EQ controls.

Mids – This control is pretty fundamental to shaping just what kind of classic amp tone you're after, too. Different amps emphasized the midrange in different ways, whether due to actual circuitry changes, speaker selection, or cabinet type; since the "body" of the guitar's sound is in the midrange, being able to adjust it this substantially is absolutely necessary to bringing out both the best qualities of your instrument and amplifier, and to dialing the pedal in to bring out the classic sound you're aiming to recreate. It's between the Treble and Mids that you'll get the majority of the fine tuning done.

Bass – Still, you have to be able to dial in the lows, and this control will let you put them exactly where you want them. For adjusting the desired cabinet response, the intended speaker size, and generally getting the pedal to "play nice" with a variety of amps, you need to be able to have precise control over the low frequencies. This control gives you precision in the low frequencies. A good place to start is noon, and if that's bassier than you like, reduce it; if it's too lean, increase it. It may be a good idea to adjust this last, if you've got the basic voicing of the other two EQ knobs dialed in.

Gain – While the simple function of this control is just to increase how much crunch there is to the tone (or, if used in conjunction with the Gain Boost Switch, bring it into Tweed territory with the right settings), you can also use this set low to create a "preamp" effect, placing the pedal toward (or at) the end of your signal chain so that only the dramatic shift in voicing to the classic black-paneled amp of your choice takes place. Several of our artists tested this out after it was mentioned in an early issue of our Wampler Pedals E-Zine, and many users have enjoyed this "tone shaper" method too. But if you want some singing crunch, crank it up!

Gain Boost Switch – This toggles between a lower gain and higher gain mode internally. Mainly intended for versatility, since different guitars have different signal levels and we don't want you to be stuck if you're using a super low output guitar, its "hidden" feature is that if you turn the Gain Boost on and start raising the gain, the pedal can start to edge a bit into primitive amp, tweed territory.