The FireBall V, with a cardioid pickup pattern for isolation and feedback control, is equipped with a VLMtrade; diaphragm for natural sound reproduction with exceptional transient response. Designed for harmonicas (both diatonic and chromatic) and beatbox, the FireBallV has the added feature of a volume control knob.nbsp; The Fireball V has a wide frequency response of 50 Hz - 16 kHz and is lightweight, compact and comfortable to hold. Because the FireBall V is a low impedance microphone, a quality, low-high impedance transformer (T50k) is required when using with a guitar amplifier.