Wyred 4 Sound mPRE User Manual
mPRE
mini-PRE Owner’s Manual
**IMPORTANT**
Check position of AC mains switch prior to
connecting the unit to a power source.
©Wyred 4 Sound 2013
All rights reserved.
v1.2
Table of Contents
Register Your Product 1
READ FIRST Important 1
Package Contents 1
Introduction 2
Design and Feature Overview 2-3
AC Mains Voltage Switch 4
Powering your Pre-amp 4
“Break-In” Period 4
Front Panel Operation 5
Aux 2 / Home Theater Bypass 5-6
Variable / Fixed Out 6
DC Trigger 6
USB Configuration (MAC) 6-7
USB Configuration (PC) 7-8
Back Panel Diagram 8
Troubleshooting 9
Got Hum? 9-10
Warranty Coverage 10-12
Service 13
Specifications 14
Register Your Product!
It is very important to complete the warranty registration form located on
our website. You MUST complete and submit the form within 30 days of purchase
to activate your warranty. When you navigate to our website there is a tab called
“Register Products” that will allow you to fill out and submit the form.
**Keep your packaging! It is custom made for your unit and will effectively protect it for
possible future use.**
Important
Please read the entire manual before connecting this product to any existing
components. This manual contains detailed information regarding the design,
operation and features of the Wyred 4 Sound mPRE. Damage due to misuse or
failure to properly follow instructions will not be covered under warranty. See
“Warranty” for an in depth understanding of warranty restrictions regarding this
product.
**Caution**
The mPRE has an external AC mains switch that must be properly
configured before connecting to AC power. Any damage as a result of
failure to set the switch properly is not covered under warranty. Please
refer to the “AC Mains Voltage switch” section in the manual for the fuse
value and configuration instructions.
Unpack carefully
The mPRE packaging contains:
1 – Owners Manual
1 – 6’ AC Power Cable
1 –3.5mm mono trigger cable
1 – mPRE pre-amplifier
pg. 1
Introduction
Thank you for purchasing the Wyred 4 Sound mPRE. This compact Preamp/DAC is a very versatile unit that will adapt to many systems for years to come.
Extensive amounts of engineering have been applied to produce remarkable
performance and a noteworthy feature set in a chassis smaller than the average
DAC.
The nature of a Wyred 4 Sound product is able to reproduce your favorite
recording with an abundance of transparency and detail. The internal circuits and
components are carefully selected and designed to reproduce our signature sound.
Nothing is better than having Wyred behind your music!
We understand that there are many products on the market which have
similar features and internal parts. Our implementation is what sets our products at
another level. We design and manufacture in the USA to offer unmatched quality
and value comparable to those produced in regions where manufacturing is much
less costly. Aside from great customer service, build quality and absolute fidelity
remain our greatest strength.
Design and Feature Overview
A preamp plays a crucial role in any HiFi system. Its job is rather simple, but
developing a component that is able to control levels without adding coloration,
distortion, or any other undesirable attribute is a delicate matter. We began by
designing a fully balanced circuit from input to output which actively rejects noise
and lowers distortion. The noteworthy sonic benefits of the balanced architecture
will be evident in both a lower noise floor as well as finer detail. The analog volume
control design is very similar in principle to the award winning STP-SE. Additionally,
the preamp has been equipped with completely separate right and left channels
which begins with the power supplies. As a result of the absolute channel
separation and remarkable channel matching, our new mPRE produces holographic
imaging that is apparent at all listening levels. The fully balanced, dual mono, dual
differential circuit design is unheard of at this price point. Implementing over 80
FET's which are quad-paralleled for lower noise and increased current is only one
reason why the mPRE prevails. Input and output stages have been incorporated to
preserve sonic integrity throughout the circuit. Because of an extravagant design,
you will have the option to pair this preamp with anything from W4S solid state
gear to tube equipment with excellent results.
This state-of-the-art preamp has a built-in DAC with three inputs which
include Toslink, Coaxial and USB. All digital inputs support 24 bit 192kHz streaming.
The ESS Sabre DAC utilizes Hyperstream™ and Jitter Elimination Architecture
pg. 2
rendering it immune to jitter. The USB interface is derived from the latest
asynchronous XMOS design which is certified USB 2.0 High Speed and Audio Class
2.0 compliant. Consequently, our mPRE requires a quick driver install for PC
machines and is driverless for Mac (10.6.4 and above) as well as Linux systems.
Incredibly low latency in conjunction with the asynchronous mode communication
and ultra precise clocks permits exceptionally high quality digital streaming. A preamp of this caliber and flexibility will efficiently improve your system.
The mPRE is equipped with a total of 3 analog inputs and outputs. Two of the
analog inputs are RCA and one of them can be configured as a Home Theater
bypass input. The two RCA outputs are the typical variable output type but one of
them can be configured as a fixed out. Finishing it off is the balanced (XLR) input
and output utilizing high quality Neutrik connectors. Due to the extent of this firstclass design, single ended to balanced conversion is inherent in the design and
ensures that all of the independent outputs are active regardless of the selected
input. You can be confident that the signal path for your analog sources are highly
refined with the mPRE.
On the occasion that you are craving a headphone session, the mPRE has a
¼” headphone jack on the front panel so you can plug right into the high
performance headphone amp. Taking advantage of the dual mono design and low
noise, the mPRE is nothing short of impressive. All of the benefits the preamp will
be even more apparent with the headphone stage. An abundance of dynamic range
and power capable of driving headphones down to 16 ohms makes for a true hi
fidelity headphone experience.
Finally, the chassis design is attractive and functional. A front and top view of
the unit reveals only two screws tucked neatly in the rear of the top cover. The
front panel is meticulously machined from a solid piece of ¾” aluminum which is
line grained and anodized in black. A radius on either side of the front panel
smoothly rounds the corners off with elegance. custom side extrusions extend to
the rear of the unit and bare the same high quality anodized finish. The top cover is
available in clear anodize (Silver) or black and has stylish venting allowing heat to
escape. The powder coated steel chassis has additional venting on both the bottom
and rear to help with the passive cooling. You can be sure that the chassis is very
rigid and immune to frequencies and vibrations which can be generated by the
various components in a HiFi system.
pg. 3
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