Mono Instrument and DI Preamplifier with Six Passive Tone-EQ Curves
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Avalon Design
Mac & Win
Availability: In stock

The U5 is a Pure Class A instrument DI and preamplifier. Designed to optimize signal integrity and musical performance, the U5 is ideal for bass guitar and acoustic instruments, electric guitars, keyboards, synthesizers and low output pickups.

The U5 combines a unique passive tone selector with a variable gain preamplifier and filter. The high input impedance accepts a wide variety of signal levels. Features include a state-of-the-art, high input impedance input stage for zero load effect on sensitive pickups and keyboards, 100% discrete and Pure Class A signal amplifiers. Six passive tone-EQ curves are also included to enhance a variety of acoustic and electric instruments.

A high-cut switch eliminates unwanted acoustic pickup and high frequency noise, while a headphone monitor amp has been included on the U5 for personal listening. Twin DC coupled Class A output amplifiers drive both low level microphone preamplifier inputs and high level +4dB inputs for direct to tape recording or processing. The "active-to-thru" switch selects either the instrument input directly or sends the boosted-equalized signal to the amplifier via the front panel jack. A ground isolation switch eliminates any possible earth loop or AC buzz problems with complete safety.

Pure Class A, 100% discrete design
Smooth musical detail and sonic excellence
Variable gain preamp to +30dB
Dual microphone and line outputs
Very low noise
High headroom
Six tone bank selections
DC coupled Class A output for superior bass
High cut switch eliminates noise
Headphone monitor output jack
High level 400 watt speaker input
100% discrete power supplies for audio path
Internal toroidal power supply for low noise


Circuit Topology: 100% discrete, high-voltage Class A

Gain: Switched 3dB steps, maximum gain +30dB

Input Impedance: 3 ,000,000 ohm unbalanced (single ended)

Maximum Input Level: +24dBu unbalanced, 400w speaker input

Output Connectors (2): XLR type, pin 2 hot electronicbalanced

Maximum Output Level (Class A): +30dBu DC coupled, balanced600 ohms (mic and line out)

Headphone Output: 0.5w into 600 ohms

Noise 20kHz Unweighted: -100dBu minimum gain position

Distortion THD, IMD: 0.1% at +10dB

Frequency Response, -/+0.5dB: 5Hz to 100kHz

Frequency Response, -3dB: 1Hz to 500kHz (input band limited)

High Cut Filter: -3dB at 8kHz minimum phase design

Tone Selector: Six position rotary switch, all passivefilters

AC Power: Internal toroidal AC supply

Dimensions: 8.5 x 3.5 x 12 in (216 x 88 x 305mm)

Weight-Packed: 12lbs (5.4kg)

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