Pass Labs XP-30 Manual Do Utilizador

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XP-30 Owner’s Manual
In an area of  electronics where it is often thought that everything 
that can improve the sound has already been done, where other 
designers are concentrating on mechanicals and eye-candy, we offer 
better sound.
The XP-30 is the best preamplifier line stage ever made by Pass 
Labs.  By extension it is possibly the best line stage ever made.  It 
is the result of  several years effort by Wayne Colburn and staff  at 
Pass Labs and has undergone numerous designs, redesigns, revisions, 
more revisions, adjustments and tweaks; more than any preamp 
product with the possible exception of  the XP-25 phono stage.
Measurably the XP-30 generates less noise, less crosstalk, less 
distortion.  It delivers greater dynamic range, gain, output voltage 
and output current.  This is not why it is a breakthrough product.
We value technical excellence, but it is always the sound that is 
paramount.  Many audio products have measured spectacularly well 
but have not gone down as classics   because they have not delivered 
subjective qualities that keep listeners happy beyond the occasional 
initial excitement. With this uppermost in mind we set out to create 
a new preamplifier that simply invites you to listen.  We want you to 
anticipate listening to your entire record collection, again and again.
As part of  the process in developing the XP-30 we began by 
uniformly upgrading the playback systems of  our listening group.  
We do not do AB or ABX testing – our people live with prototypes 
as long as they like in their own system, and only one component 
gets changed at a time.  This allows a close duplication of  our 
customer’s experience and makes it easier to hear differences over 
extended time, with our focus remaining on the quality of  the sound.
Several set of  prototypes were evaluated and refined over a period of  
three years.  This period also saw the final development of  the XP-
25, and its presence allowed us to work in as much synergy between 
the components as possible.  Several different power amplifiers 
also participated, including XA.5 amplifiers, prototype “Concept” 
amplifiers, SITs, and even tubes.
In the end everyone agreed on the sound - music flows through the 
XP-30 with greater ease, spatial development and dynamic contrast 
than anything else we have heard.  Wayne even managed to fit in 
a couple of  my requested features – enhancements for bi-amping, 
and enough gain and voltage swing that the XP-30 can drive power 
amplifier output stages all by itself.  Me, I wrote this introduction 
because Wayne was too modest to.  - Nelson Pass
Introduction