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T-Rex Engineering Whirly Verb Reverb and Modulaton Effect Pedal

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  • Input impedance @ 1KHz: Higher than 1M Ohm

  • Output impedances @ 1KHz: Lower than 1K Ohm

  • Power Supply: 9V DC (T-Rex FuelTrank)

  • Minimum power supply voltage: 8.5V DC

  • Maximum power supply voltage: 12.5V DC

  • Current draw @ 9V DC: 90 mA

  • Maximum input signal Vp/p: 2Vp/p

  • Battery type: 9V battery 6F22

  • Battery Life: 30-60 minutes

  • External connectors: Input Jack, Output Jack, 9V DC Jack

  • Controls: On/Off, Volume, Reverb, Modulation, Decay

  • Pedal Size incl. knobs (W x H x D): 100 x 55 x 120 mm / 3.9 x 2.2 x 4.7 inch

  • Weight excl. battery and packaging: 0.335 kg/ 11.8 oz

Manufacturer's Description

Reverb pedals either try to emulate the sound of a room by mimicking the way sound bounces off the walls floor and ceiling, or they mimic classic effects like the spring reverb that try to recreate the sound of different rooms.

Whirly Verb doesn’t emulate just any room – or even different types of rooms. This amazing reverb from Denmark’s T-Rex Effects was dreamed up to recreate the most beautiful room in the world.

Reverb to die for

Whirly Verb starts with most gorgeous reverb sound you’ll ever hear for a guitar. You can adjust the amount of reverb and the decay time – but no matter how you set it, it just sounds warm, rich and delicate. And isn’t that the way it should be? If you want to put your guitar in an emulated room, for heaven’s sake, put it in a room that makes your guitar sound divine!
A stranger kind of beauty

You might want to sound like you’re playing in the halls of heaven most of the time, but what about those days (or songs) where you’d rather sound slightly less angelic? Whirly Verb’s MODULATION function lets you take that perfect reverb and thicken, twist and turn it to sound like something strange is going on... Combined with the REVERB and DECAY controls, MODULATION offers you a world of strange reverb sounds that will inspire your creativity and fascinate your audiences.


  • Best analog sounding Reverb
  • Related to the famous T-Rex Roommate
  • Tremendous ranges - can be set to emulate pretty much any size room you can imagine
  • The modulation effect uses a simple warm, vintage chorus circuit
  • Great for guitarists with experimental tendencies