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15

WARRANTY

The P331 Tube Loading Amplifier is covered by a limited warranty against manufacturing defects 
in materials and/or workmanship for a period of five (5) years from the date of original purchase 
and only after proper registration which should be submitted by completing the on line registration 
form at:

 www.whitestoneaudio.com/register

Whitestone Audio Instruments, LLC’s sole obligation under this warranty is to provide, without 
charge, replacement parts and labor for the above referenced defects. Vacuum tubes and other 
consumables such as LEDs are not covered under these terms. Vacuum tubes and LEDs are covered 
for a period of six (6) months with proper registration.

This warranty does not cover damage due to misuse or abuse, modification, accidental damage or 
negligence. The warranty is also void if the P331 is repaired or altered by anyone not authorized, in 
writing, by Whitestone Audio Instruments, LLC.

If it is determined the P331 is eligible for warranty repair, a return authorization must be obtained 
from Whitestone Audio Instruments, LLC prior to shipment. Please don’t ship equipment back to us 
without first obtaining this authorization. It’s simply for organizational reasons and will expedite 
your warranty claim. Please return the unit in its original packaging. Make sure to not discard the 
P331’s carton and custom foam insert after purchase. These cartons were specifically designed 
to protect the P331 during shipping. If the unit is not returned in original packaging, owner will 
be charged for new factory packaging. Include a note in the box that includes the owner’s name, 
address, telephone number, email address as well as a description of the issue to be repaired. The 
owner pays for shipping the unit to the address provided with the return authorization and we 
suggest the shipment be insured for the P331’s full value. Whitestone Audio Instruments will not be 
held liable for damage during shipping. After repair, the unit will be shipped to the customer prepaid 
and insured. Whitestone Audio Instruments, LLC will not pay for express or overnight shipping nor 
for shipments to locations outside the USA.

Whitestone Audio Instruments, LLC is in no way responsible for indirect, incidental or consequential 
damages arising from the use or failure of this product, including injury to persons or property. Any 
and all warranties of merchantability and fitness implied by law are limited to the duration of this 
warranty. This limited warranty gives you specific legal rights, and you may also have other rights 
which vary from state to state.

All specifications are subject to change without notice. 

Statements in this manual regarding the suitability of the P331 for certain types of applications are 
based on Whitestone Audio Instruments, LLC’s knowledge of typical requirements that are often 
placed on pro audio products in generic applications. Such statements are not binding statements 
about the suitability of the P331 for a particular application. It is the customer’s responsibility to 
validate that the P331 Tube Loading Amplifier is suitable for use in a particular application. Parameters 
provided in this manual, data sheets and/or specifications may vary in different applications and on 
different source material. Performance may vary over time.

©2019 WHITESTONE AUDIO INSTRUMENTS, LLC

Содержание P331

Страница 1: ...1 ...

Страница 2: ...NTRODUCTION UNPACKING INSTALLING FEATURES CONTROLS REAR PANEL CONNECTIONS OPERATION WARRANTY TABLE OF CONTENTS Logo should without exception be either BLACK on light colored backgrounds or WHITE on dark colored backgrounds ...

Страница 3: ...for a custom piece of analog gear for her new mastering room Something unique We ended up brainstorming on an idea for a versatile tube stage for her analog chain Much of the way Kim works is exploiting the sound of the input and output gain stages of some of her favorite equalizers and compressors with actual processing bypassed Just the subtle enhancement some of these analog gain circuits provi...

Страница 4: ...itch toggles the fully balanced solid state output GAIN control between BOOST mode CUT mode or OUT which completely removes the GAIN circuit from the audio path There is an indicator LED that will alert you when CUT mode is engaged GAIN CONTROL This rotary switch allows for up to 11dB of boost or cut in 1dB increments The output GAIN circuit is a fully balanced low distortion solid state amplifier...

Страница 5: ...rophone preamp it can be used effectively as a worthy addition to any traditional recording chain The P331 can be somewhat of a chameleon in that how it reacts is highly dependent on the source material its being fed We are of the school that there is no right and wrong when it comes to art Close your eyes turn the knobs Ultimately your ears will and should guide you GETTING STARTED Make sure all ...

Страница 6: ...auto padding modes XFORMER The P331 is designed to run fully transformerless in its default state The OUT setting is a hard wire bypass This provides the purest cleanest and most unaffected audio path through the unit However in keeping with the P331 s versatility the operator may switch in output transformers and select two optional settings to load them in different ways This provides additional...

Страница 7: ...ood time to start getting acquainted with your solid state output GAIN section Before engaging OPEN put the GAIN circuit into CUT mode and turn the knob all the way to the right This starts you off with 11dB of attenuation Since in OPEN you now have no auto padding going on the LOADING knob turns into a tube gain control As you turn up the LOADING knob your level will increase with each switch pos...

Страница 8: ... note in the box that includes the owner s name address telephone number email address as well as a description of the issue to be repaired The owner pays for shipping the unit to the address provided with the return authorization and we suggest the shipment be insured for the P331 s full value Whitestone Audio Instruments will not be held liable for damage during shipping After repair the unit wi...

Страница 9: ...Copyright 2019 Whitestone Audio Instruments LLC 32 Cupsaw Drive Ringwood NJ 07456 201 207 9884 www whitestoneaudio com REV 1 ...

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