U4PRE (Audiophile Pre Amplifier)

The Ultrafide U4PRE (audiophile quad output pre-amplification system) provides the central core and control of an expandable and “future-proofed” audio system.  A perfect partner to the U500DC Power amplifier, this pre/power combo delivers a truly high fidelity sonic signature, all designed and manufactured in the UK.

 

PRODUCT DESCRIPTION

Quad outputs for use with bi-amplified system
Class A circuits
Minimum Signal path
DC (and Super Low Frequency) Coupled Systems
Headphone amplifier
Highly configurable ultra premium phono stage – Suitable for use with a wide range of moving magnet and moving coil cartridges
OLED screen with remote control for full configuration
Expansion port for additional interfaces
Over engineered power supply
Bringing professional audio home!

DATASHEET MANUAL

Main Specifications

Additional information

Input / Output

DC (and Super Low Frequency) Coupled Systems

Circuits

Class A

Inputs

1 x Phono (pair), 2 x RCA (pair), 2 x XLR (pair)

Outputs

2 x RCA (pair), 2 x XLR (pair)

Dynamic Range

>111dB (unweighted)

Phono Stage

• MMC Capacitors, switch selectable from 100pF to 470pF (in 8 steps)
• MCC Resistors, switch selectable from 85R to 500R in 7 steps (8th 47K for MMC)
• Gain range, software controlled in 30 x 3dB steps (+35dB to +65dB)
• RIAA curve using 1% tolerance parts with individual stages for each turnover freq.
• Inaudible Elliptical anti-rumble filter, >40dB of reduction @ 2-6Hz.

Headphone Amplifier

• Class A/B design – 12 discreet transistors to achieve super low distortion.
• Optimised for 20 to 100R Headphones.
• Ample power to drive low and High impedance (8R – 300R) Headphones.

Distortion

0.003%

Power Consumption

Operational 30W
Standby 1W

Frequency Response

Line – 5 to 20kHz +-0.1dB
Phono (Inc RIAA) – 20 to 20kHz +-0.3dB

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