Gone are the array of dials found throughout the standard JHS pedal line-up. What you're getting here is a refined, quality sound thanks to high-end electronic components and meticulous attention to detail from the Kansas City company. This is the ultimate plug-and-play pedal.
Reverb is an essential effects in any setup and fills out your guitar sound with depth and character. The 3 Series is an extremely versatile pedal - a highly desired quality for most guitarists - capable of small washes of reverb right up to hall-filling ambience and anything in between. Controls here consist of verb, EQ and decay. Verb is your wet/dry signal mix, while EQ sets how bright or dark the voicing sounds. Decay extends or reduces the length of the reverb effect.
In addition to the three standard controls is a pre-delay switch. This control is usually found on high end pedals and sets a small delay after you play and when the reverb kicks into action.