AVALON DESIGN PURE CLASS A U5 MONO INSTRUMENT DI & PREAMPLIFIER

AVA L O N

P URE C LASS A

DESIGN

M USIC R ECORDING S YSTEMS
SONIC EXCELLENCE The Avalon U5 Pure Class A instrument DI & preamplifier is the most powerful direct box available today. Designed to optimize absolute signal integrity and musical performance, the U5 includes many features and sonic excellence unequaled by lesser designs. The U5 is ideal for bass guitar and acoustic instruments, electric guitars, keyboards, synthesizers and low output pickups. Features include state-of-the-art, high input impedance input stage for zero load effect on sensitive pickups and keyboards, 100% discrete, Pure Class A signal amplifiers, practical user features and rugged hardware designed to deliver true high performance audio for many years. DESIGNED FOR DEEP & CONTROLLED BASS Avalon U5 DI-preamps have been in use around the world since 1995. They have found their way into the world's leading musicians rigs and recording sessions and been featured on thousands of the best selling (and sounding) albums and live performances. MINIMUM SIGNAL PATH DESIGN The U5 includes a variable gain Class A preamplifier to boost low level pickup signals and a high level speaker input for capturing the live sound of the instruments amplifier. 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 for personal listening. Twin DC coupled Class A output amplifiers drive both low level microphone preamp 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 boostedequalized 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.

INSTRUMENT DI-PREAMP

U5 FEATURES
Smooth musical detail and sonic excellence Variable gain preamp to +30dB. Pure Class A, 100% discrete design Dual microphone and line outputs Hi-Z 3,000,000 ohm input impedance Very low noise -100dB High headroom +30dB Six tone bank selections DC coupled Class A output for superior bass High cut switch (low pass filter) eliminates hiss LED active signal indicator Headphone monitor output jack Low distortion less than 0.5% THD and IMD High level 400 watt speaker input Active to thru selector - ground isolation switch 100% discrete power supplies for audio path Internal toroidal power supply for low noise Long lasting, stainless steel hardware

AVALON

Pure Class A music recording systems since 1985.
c 2000 by AVALON INDUSTRIES, INC. PO Box 5976, San Clemente, California, U.S.A. Tel: 949-492-2000 Fax: 949-492-4284 www.avalondesign.com email.avalon@avalondesign.com
S P E C I F I C A T I O N S
100% discrete, high-voltage Class A Switched 3dB steps, maximum gain +30dB 3 ,000,000 ohm unbalanced (single ended) +24dBu unbalanced, 400w speaker input XLR type, pin 2 hot electronic balanced +30dBu DC coupled, balanced 600 ohms (mic and line out) 0.5w into 600 ohms -100dBu minimum gain position 0.1% at +10dB 5Hz to 100kHz 1Hz to 500kHz (input band limited) -3dB at 8kHz minimum phase design
Circuit topology Gain Input impedance Maximum input level Output connectors (2) Maximum output level (Class A) Headphone output Noise 20kHz unweighted Distortion THD, IMD Frequency response, -/+0.5dB Frequency response, -3dB High cut filter

Tone selector

+6 0dB +6 0dB
Six position rotary switch, all passive filters
+6 0dB +6 0dB +6 0dB +6 0dB

1kHz 10k 20k

acoustic and string instruments, electric bass and keyboards

electric bass guitar

acoustics, strings, electric and bass guitar and keyboards
acoustics, strings electric and bass guitar and keyboards
acoustic and electric guitar

electric and bass guitar

AC power Dimensions Weight-packed Rack mount kit (1) RM-1 Rack mount kit (2) RM-2
Internal toroidal AC supply 115-230v selectable 50/60Hz, 40w max 8.5 x 3.5 x 12 in (216 x 88 x 305mm) 12lbs (5.4kg) Single Uinch rack mount kit (holds one half rack unit) Dual Uinch rack mount kit (holds two half rack units)

Avalon reserves the right to incorporate changes in design and in the specifications of this product without prior notice.