aion STRATUS Manuel - Page 5

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BUILD NOTES

Clipping Switch

The clipping switch allows you select between different sets of diodes.

The downward position of the toggle switch is the stock Tube Screamer clipping arrangement, which has

one silicon diode in each direction. The upward position of the toggle is two diodes in each direction, a

higher clipping threshold with a more open sound. The center position leaves only the LEDs for a more

dynamic and transparent tone.

If you look at the schematic, you'll see that the LEDs, D8 and D9, are always connected. However, in

either the up or down switch positions, the lower-threshold diodes are connected and so the LEDs have

no effect—there's no signal left for them to clip.

Feel free to experiment, For example, you could jumper D7 for asymmetrical clipping as in the Boss SD-1

Super Overdrive. Or, you could omit the two clipping LEDs for a diode-lift mode in the center position.

Bass Switch

The bass switch selects between different EQ settings. Using the default configuration, the center

position is the stock Tube Screamer bass setting. The downward position adds more bass and the

upward position adds even more.

Like the clipping switch, you can experiment with the values here as well to tweak the sound to your

liking. The stock Tube Screamer capacitor is C4, and the toggle switch puts CX2 or CX3 in parallel with

it (parallel capacitors add their values to each other). By tweaking CX2 and CX3, you can fine-tune the

bass settings to something you'd find useful.

There's also a way to set it up for "less bass" if you want. Reduce the value of C4 to something like 33n to

make the center position a bass-cut setting. Then make CX2 a 10n or 15n capacitor to put it very close

to the 47n stock value. CX3 could be kept at 68n.

STRATUS CLASSIC OVERDRIVE