The CP-15 Tantrum Heavy Metal is a distortion pedal from Caline, a maker known for affordable pedals such as the Caline Tantrum, the Caline Red Devil and the CP-77 Bounty Hunter Heavy Metal Distortion. It is aimed squarely at high-gain playing: RockBoard's PedalPedia describes it as an extreme metal pedal that combines distortion, a booster character and a three-band equalizer in one box1.
Caline's own description of the sound is worth quoting in full, since it sets out what the pedal is built to do:
"EXTREME METAL, it has three bands powerfully adjustable EQ with sweep Mid-Freq Knob, provides a strong low Frequency, a clear and transparent high frequency, and penetrating main rhythm Tone, or sharp wide accompaniment tone."
What it does
The CP-15 is built around a three-band EQ with a sweepable Mid-Freq knob. On most distortion pedals the mid control only sets how much midrange is added or cut; here, the Mid-Freq knob also sweeps the frequency the mid band acts on, so a player can choose where the midrange sits in the mix. RockBoard's PedalPedia says the EQ is "powerfully adjustable," and the pedal is described as delivering a strong low end with clear, transparent highs1.
For tone shaping, the pedal covers three functions at once: distortion for the gain itself, a booster character, and an equalizer for shaping the frequency balance1. That makes it closer in concept to a dedicated metal preamp than a simple distortion pedal.
Where it comes from
Caline's product description compares the CP-15 to the BOSS MT-2, the long-running high-gain metal distortion that set the template for this kind of pedal1. The CP-15 is Caline's take on that style of circuit, with the sweepable mid control as its distinguishing feature.
Power and setup
The CP-15 runs on a 9V DC, center-negative supply and draws 30mA1. That is more than a simple overdrive typically needs, so it is worth checking the output rating of a shared supply before adding it to a daisy chain.
How it compares
Within Caline's own range, the CP-15 sits among several high-gain options. The CP-77 Bounty Hunter Heavy Metal Distortion is another heavy metal pedal from the same maker, while the CP-27 White British Distortion and CP-34 Head Boom Distortion cover other distortion flavors. Players who want gain plus tone shaping in one box may also look at the Easy Driver Distortion EQ, which pairs distortion with an EQ section in a similar way.
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Questions
Is the Caline CP-15 Tantrum Heavy Metal analog or digital?
The CP-15 Tantrum Heavy Metal is an analog pedal. Caline's product description lists its circuit type as analog, and it runs on a 9V DC center-negative supply drawing 30mA. That current draw is worth keeping in mind when planning a pedalboard power supply, since some daisy-chain supplies have limited headroom per output.
What does the Mid-Freq knob on the CP-15 do?
The Mid-Freq knob is part of the pedal's three-band EQ. Instead of only setting how much midrange is added or cut, it sweeps the center frequency of the mid band. That lets a player dial in where the midrange sits, from low-mid thickness to upper-mid bite, which is useful for cutting through a dense metal mix.
What is the CP-15 Tantrum Heavy Metal based on?
Caline's own description compares the CP-15 to the BOSS MT-2, the well-known high-gain metal distortion. The pedal is presented as a take on that style of extreme metal distortion, with a three-band EQ and a sweepable mid frequency control added.
Sources (1)
- CP-15 Tantrum Heavy Metal by Caline, RockBoard PedalPedia, 2026
