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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 pre-
amp 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 first-
class 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. 

 
 
 
 

Summary of Contents for mini-PRE

Page 1: ...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...

Page 2: ...rview 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 Conf...

Page 3: ...anual 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 warr...

Page 4: ...ion 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 notewo...

Page 5: ...og sources are highly refined with the mPRE On the occasion that you are craving a headphone session the mPRE has a headphone jack on the front panel so you can plug right into the high performance he...

Page 6: ...it before you can press the power button Pressing the power button will turn the unit on and the light around the power button will switch to blue It is only necessary to turn the Pre amp off with the...

Page 7: ...ring light 2 First press and hold the AUX 2 input button in and then power the unit on from standby by pressing the power button 3 Once the unit is on you can release the AUX 2 button Press the AUX 2...

Page 8: ...unit on from a standby state illuminated green around the power button to that last used input before the unit was turned off When HT bypass is active the trigger in will power the mPRE on directly t...

Page 9: ...oads html 2 Locate the file titled W4S 24 192 Driver Package and click download 3 Next click Save and be sure to note or specify the folder on your computer where the file will save to 4 When the down...

Page 10: ...yer etc 5 24 bit 192kHz Asynchronous USB USB input for streaming music from a Mac PC computer or Music Server 6 Coaxial Input for a digital source such as a TV DVD player Sonos Airport express CD play...

Page 11: ...E The point where sound will become audible varies with each system although it is typically around of the way turned up clockwise from the lowest setting all of the way counter clockwise 6 Carefully...

Page 12: ...hardware product against defects in materials and workmanship under normal use for a period of FIVE 5 YEARS from the date of retail purchase by the original end user purchaser Warranty Period If the...

Page 13: ...LIMITATION WARRANTIES OF MERCHANTABILITY FITNESS FOR A PARTICULAR PURPOSE AND WARRANTIES AGAINST HIDDEN OR LATENT DEFECTS IF WYRED 4 SOUND CANNOT LAWFULLY DISCLAIM STATUTORY OR IMPLIED WARRANTIES THE...

Page 14: ...that are tendered or presented for service during the Warranty Period as permitted by law Wyred 4 Sound is not responsible for freight charges to our facility for warranty repairs We will cover return...

Page 15: ...ty for loss or damage to the product during shipment to the W4S facility and ensure all freight shipping charges are prepaid The product may also be hand delivered to the California facility if arrang...

Page 16: ...0 020 db 0 002 db 0 002 db Channel Tracking 0 020 db 0 020 db 0 020 db Crosstalk 95 db 118 db 118 db Input Impedance 100k ohms 100k ohms 75 ohms Coax Output Impedance 100 ohms 100 ohms 100 ohms S N 10...

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