In the words of The Electronic Audio Experiments:

The Electronic Audio Experiments Surveyor is a compact re-interpretation of the Instrument Voicing Preamp (aka IVP), a cult classic and long discontinued rackmount preamplifier. The IVP is best known for its distinctively clangy tone and harsh attack at high treble settingsespecially in conjunction with an aluminum neck guitar, single coil pickups, and full range speakers.