Monster Effects / RTZ Audio Vibezilla

Various

RTZ Audio

Vibezilla is an all new all analog vibe/tremolo inspired by the original Unicord Uni-Vibe™ design, makes use of a light bulb and photocells housed in a shielded light reflective enclosure to retain the soulful qualities the original vibe is known for. However, unlike the lossy discrete filters used in the original vibe, the high-Q phasing filters in Vibezilla use audio grade op-amps and caps which give more prominent and deeper vibe sweep effects. Likewise, great attention was given to the LFO sweep oscillator, lamp and flasher design. The primary design goal of Vibezilla was to create a compact unit that truly delivers giant sound with hypnotic throbbing vibe effects that are musically and audibly addictive.

Overview

Vibezilla is an all new all analog vibe/tremolo loosely based on the classic Unicord Uni-Vibe™ design. Vibezilla, like the original vibe, makes use of a light bulb and photocells housed in a shielded light reflective enclosure to retain the soulful qualities the original vibe is known for. However, unlike the lossy discrete filters used in the original vibe, the high-Q phasing filters in Vibezilla use audio grade op-amps and caps which give more prominent and deeper vibe sweep effects. Likewise, great attention was given to the LFO sweep oscillator, lamp and flasher design. The primary design goal of Vibezilla was to create a compact unit that truly delivers giant sound with hypnotic throbbing vibe effects that are musically and audibly addictive.

Vibezilla was designed and constructed to meet the needs of electric guitars and guitar players. A super high impedance FET buffer input stage was added to prevent instrument pickup loading and signal loss. The gain structure of Vibezilla is completely adjustable via the input DRIVE control, output level trimmer and internal gain range select DIP switch settings. The adjustable DRIVE stage allows players to create driven vibe/phase type sounds full of rich harmonics and detail. Vibezilla delivers singing vibe tones and chords packed with more than enough soul to easily obliterate lesser vibes.

New Vibe+Tremolo effect!

Vibezilla contains an opto-tremolo (AM modulator) circuit that can be combined with the phased vibe output or used separately. By combining the vibe phase swept output with the tremolo modulator output (Vibe+Trem mode), more realistic rotating speaker effects are achieved. This combination phased vibe and tremolo action allows the musician to generate huge throbbing and pulsating type sounds previously unknown to vibe lovers. The wave SHAPE switch modifies the sweep modulator waveform and adds even more throb to the Vibe+Trem mode. New and experienced vibe lovers alike should quickly become addicted to this new and powerful phased tremolo effect!

Pro Audio heritage

Vibezilla was designed, engineered and built to pro-audio standards. We use high-quality long life conductive plastic pots, reliable switches and true bypass relay switching. All SMD components are modern hi-quality audio grade components combined with meticulous PCB layout for stable low-noise operation. The signal path of Vibezilla more closely resembles a high-end piece of studio gear rather than any effect pedal. All capacitors are long-life low impedance 105(C) audio grade types. Inside we use the same level of detailed build standards that we use in our high-end studio gear.

Dual speeds and remote control

Dual speed controls are selected by the SPEED A/B foot switch. True bypass and remote effect bypass switching is achieved via a small sealed telecom style relay. Blinking rate indicator LED's indicate which A or B SPEED control is active at all times. The external PEDAL jack allows a remote speed control pedal (simple three wire interface - gnd, pot & switch) to enhance and simplify vibe usage while playing. The dual speed controls are available to allow players to quickly switch between two speed settings (i.e. a fast and a slow rate) at times when a speed pedal is not used or desired for maximum flexibility.

Opto's and bulb flasher

Great effort and attention to detail went into the Vibezilla low frequency oscillator (LFO) and lamp flasher design. Rather than attempting to determine the original unknown bulb characteristics and duplicate the quirky original vibe LF design, we sought a better solution through design. Our lamp flasher LFO design uses a special function generator IC with a servo mode lamp driver amplifier that allows critical alignment and tweaking of the bulb and element glow dynamics that ultimately dictate the final vibe sound. A number of internal calibration trimmers allow fine adjustment of the bulb current and glow dynamics.

The Vibezilla LFO design also closely follows the non-linear amplitude response of the original with respect to speed (i.e. as speed decreases the amplitude of the LFO signal decreases). This LFO non-linearity "quirk" is also key to the vibe sound and is what allows the effect depth to gradually build up as the speed increases from slow to near stopped rates. You'll also notice that the DEPTH control has a big effect on the sound unlike the original vibe; this is because our flasher will drive the bulb intensity well beyond the range of the original vibe LFO. The DEPTH control is typically used in the mid position range for a closer match to the original Uni-Vibe sound. At maximum DEPTH the vibe and tremolo circuit can really squash the signal due to greater lamp intensity available with the Vibezilla design.

Power supply

Vibezilla comes with an external 18V 300 mA DC wall wart supply for maximum signal path, headroom and reliability. Internally, Vibezilla operates at 15V and contains an onboard low-noise linear regulator with thermal poly-fuse, protection diodes, noise suppression inductor and plenty of bypass and filter caps for super low noise operation. No noisy switching regulators or boost converters are used in the Vibezilla.

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low frequency oscillator lfo-controlled fx pedal stompbox stomp box guitar effects pedal tremolo trem volume/amplification modulation modulate time-based lfo
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