background image

5

X1 Owner’s Manual

noise and distortion superiority of  balanced signal, coloring what you 
eventually hear.

Pass labs through its unique patented “Supersymmetry” topology 
maintains the advantages of  a true balanced signal throughout 
the electronics chain.  The salient point of  this approach affords 
significantly less signal manipulation, higher input impedance, as 
much as a 100:1 (20dB) reduction in distortion while providing 
greater gain, and twice the dynamic headroom of  identical circuits 
running single ended.
 
The X1 maintains the integrity of  its received signal by treating 
all sources internally as balanced signals and converts seamlessly 
between balanced and unbalanced inputs and outputs without any 
additional components in the signal path.  This was a conscious 
effort by Pass Labs to enhance the consumer’s ability to integrate 
source components and power amps with otherwise incompatible 
requirements through a virtually transparent control center.

The rear mounted pair of  five-way binding posts are intended to 
control the on/off  function of  our own X series power amplifiers 
from the X1’s front panel, or via the four button remote.  When 
the preamp mode “Amp” is selected it allows the user to switch a 
nominal 12 volts DC at maximum draw of  50 milliamps to these 
binding posts.  In some instances this voltage may have the ability 
to control products from other manufacturers, but we by no means 
have a comprehensive listing of  their compatible features.  If  you 
have questions about compatibility, your service technician and dealer 
are an excellent source of  information.

In application the X1’s front panel controls and alphanumeric 
display are quite straightforward and intuitive.  We encourage you to 
become familiar with their operation prior to establishing any input 
connections with this unit. Experience indicates that engaging in 
a few minutes of  exploration and playtime will add much to your 
ultimate enjoyment of  this exceptional Pass Labs product.

The Mode switch moves between 10 different functions. They are 
Volume, Input, Mute, Tape, Balance, Display, Mono, Unity, Amplifier 
(power amplifier turn on / turn off), and Gain adjust.  Actuating 
the Mode  “<”  switch  moves the display to the function one step 
to the virtual left and  “>”  button moves to virtual right, one step. 
The Select switch then alters the function of  the displayed mode.  
The knob on the right is always the Volume control, and it is always 
active.  The Select  “^”  button turns on a function or increases its 
value it is also balance right.  The select  “v”  turns a function off  or 

Description of  Operation

Summary of Contents for X1

Page 1: ...1 X1 Owner s Manual pass TM X1 Owner s Manual Aug 10 2006 ...

Page 2: ...inimizes the number of components in the signal path and yet retains exemplary objective performance specifications It pushes the edge of the art in exploring how much subjective quality is obtainable with a new but very elementary gain stage The X1 employs a new type of volume control that offers an order of magnitude better performance than seen before in an electronic control It provides over 6...

Page 3: ... the rear panel of the main chassis and the power supply The connectors are a tight fit but should never need to be forced The X1 will function with either DB 25 on the power supply chassis The additional DB 25 is for future performance enhancements We have provided a standard AC power cord that fits into the IEC line receptacle at the right rear of the power supply chassis The preamplifier is equ...

Page 4: ...have arranged that it will not place its output on the tape out which will prevent you from accidentally creating a feedback connection with your tape machine The main outputs are located at the left hand side viewed from the rear of the rear panel two male XLR connectors and two RCA connectors R right and L left The RCA connectors ground is in parallel with pin 1 of the XLR outputs and the RCA ho...

Page 5: ...ed it allows the user to switch a nominal 12 volts DC at maximum draw of 50 milliamps to these binding posts In some instances this voltage may have the ability to control products from other manufacturers but we by no means have a comprehensive listing of their compatible features If you have questions about compatibility your service technician and dealer are an excellent source of information I...

Page 6: ...eme virtual right of the mode selection is the function labeled gain This control allows you the user to adjust the gain of the X1 to extract the best possible performance out of a variety of source components of different manufacturers The Low Gain setting allows for 4 dB of gain from the X1 and the Hi Gain allows for 14 dB of gain The 10 dB difference between these two settings require that you ...

Page 7: ...and a minimum number of components is a key element The fewer parts in series with the signal path the better Adding more parts and gain stages may improve measured specs but will seldom improve the perceived sonic quality 2 The characteristic of gain devices and their specific use is important Individual variations in performance between like devices are important as are differences in topologica...

Page 8: ... repeatable and accurately controlled The micro processor only controls the functions of the preamplifier At no time does any of the input or output signal come into contact with the digital control signals The digital circuits are powered by a power supply that is completely separate from the analog supply Should it ever be necessary to update the software that controls the functioning of the pre...

Page 9: ...about 10 hours of turn on The omission of a power switch is intentional The X1 consists of two full size aluminum chassis Both chassis are machined from solid aluminum stock by computer controlled milling machines There are no stamped or sheetmetal products in this product One of the full size chassis houses the control functions active elements and display The second chassis houses the power supp...

Page 10: ...ms balanced Input Impedance 33 kOhm unbalanced 66 kOhm balanced CMRR typical 55 dB 1KHz Crosstalk typical 85 dB 1KHz Output Noise floor 125 dBV 20Hz 20 KHz External amp turn on 12 volts DC 50 mA Power Consumption 35 watts Dimensions chassis 17 W x 11 5 D x 3 5 H each Shipping Weight 46 pounds in packing carton X1 Specifications Pass pass Pass Labs Pass Laboratories Supersymmetery Aleph and Zen and...

Page 11: ...of origin for warrantee service Foreign distributors are only required to offer warranty service on Pass Laboratories product that they have imported Please note Conditions of warranty service and customer rights for product purchased outside the United States may vary depending upon the distribu tor and local laws Please check with your local distributor for specific rights and details Any modifi...

Page 12: ...one that is fully safety rated by the necessary local authority Power Cord Protection Power supply cords should be routed so that they are not likely to be walked on abraded or pinched by items placed on or against them paying particular attention to cords where they enter plugs or exit from a device Never under any circumstance insert a cut or damaged power cord into a mains power socket Power an...

Reviews: