6. Pedal Feel
The angle through which the wah-wah pedal is able to move from its minimum to its maximum position is critical, and all other things being equal, may apparently alter the character of the effect. This is illusory however - whilst the filter electronics of two given models may be identical, the different physical pedal movement ranges tend to influence the playing approach, and therefore the perceived sound of the device. For example, the Boss PW-10 has a very shallow movement range, making it easy for the player to produce a choppy and rhythmically tight performance. The Vox on the other hand has a much wider travel, and lends itself well to smoother and perhaps more leisurely and continuous transitions between frequencies. Some pedals allow adjustment of the overall travel using a thumb screw or similar on the base of the unit.
Another consideration is the friction of the pedal movement - some like them loose, others like them stiff! Once again, this can usually be adjusted, but removal of the underside panel will normally be required in order to access a grub screw which slackens or tightens a sprung-steel plate. This is in contact with a nylon bar which spans the unit at the pivot point. Some more sophisticated designs have a friction control conveniently mounted on the outside of the unit, as with a travel range adjustment control.