Vox VR30 Guitar Combo Amp
Condition: Very Good, Hard to Find
The 30 Watt VR30 Reverb features three selectable sounds (Clean, OD1, OD2) and custom 10" VOX speakers. The VR30 also features spring reverb. The amp utilizes solid state technology in the preamp stage and VOX's proprietary Valve Reactor power amplifier technology (with built-in 12AX7/ECC83 tube).
- Channel switching button (Normal/Overdrive)
- Overdrive "Style" button (OD1/OD2)
- Normal (Clean) channel volume control
- Overdrive channel gain control
- Overdrive channel volume control (controls the amount of preamp signal that is sent to the Valve Reactor power amp)
- Footswitch jack
- Headphone jack
- External speaker jack
- Spring reverb
- Master volume & reverb controls
- Separate Bass & Treble controls for each channel
The VR series represent Vox's next generation of "hybrid" tube and solid state guitar amplifiers. The Preamp stage uses discrete transistors and integrated circuits (ICs) in the parts of the circuit where they are most effective. The discrete transistors are used for sound generation and the ICs for signal management.
The Power amp stage uses a 12AX7 vacuum tube in VOX's patented Valve Reactor circuit. This VOX technology was originally designed for the Valvetronix Modeling products, but has been further revised for use in the VR30 Reverb and VR15 amplifiers.
VR technology utilizes each half of the 12AX7 (the 12AX7 tube is actually two identical tubes in one glass tube a.k.a. dual triode) configured as a small tube power amplifier. This circuit provides the tonality and feel of an all-tube power amp. This "small" tube power amp is connected through a virtual output transformer to a larger, transparent current feedback solid-state power amplifier that is designed to not add coloration to the tube signal. The power output amplifier feeds the loudspeaker impedance information back into the tube part of the power amp in order to achieve the sound and feel of an all-tube amp.