DOD 440 Envelop Filter (Used) Upright Bass Strings TONE Knob：Controls the treble frequency

TONE Knob：Controls the treble frequency of Morning Star circuit

• Super 58 pickups feature moderate output and vintage tone

It is pre-slotted for a quick and simple install

Premium radiused ebony fingerboard gives extra durability and striking good looks

DOD 440 Envelop Filter (Used) Upright Bass Strings TONE Knob：Controls the treble frequencyPedal is in good condition, with on slight wear on the case. 100% working as it should. Comes with the original box. From DOD The DOD 440 makes your guitar speak with vowel like sounds, and cry with slow filter sweeps that react to your pick attack. The new addition of the up and down switch lets you choose which part of the sweep you want to emphasize. Guitarists will love the UP setting for classic envelope quack. Bassists will love the DOWN setting