Walrus Audio Warhorn Overdrive

in good working condition. 

From Walrus:

The Walrus Audio Warhorn is an overdriven call to arms capable of taking your tone from a percussive attack to a hot open roar in the space of a toggle switch. Sitting in the midrange of the gain spectrum, the Warhorn employs compressed symmetrical clipping and an organic asymmetrically clipped roar in one unit with bass/treble EQ, drive, and level knobs for tailoring tones to your exact taste. Full of punch that won't compromise your rig's natural tone, the Warhorn's versatile character works well as a standalone overdrive for blues or rock or as a stackable option for those with bigger pedalboards.