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.
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)