Vintage Sound Workbench 

Frequently Asked Questions

The Amp Preserver
Hand machined and assembled in USA

1.  Why do you call it the Amp Preserver.   What does it do to 'preserve' my amplifier?

Good question.  Actually, we have changed the name to Tone Preserver.  Aside from the dramatic change in tone you will get from your amplifier, your amplifier's components are now running at their designed voltage.  The result is longer life for your NOS tubes, resistors, filter caps, and especially the power tranformer.  So you are preserving the life of your vintage tube amp.  

2.  Why can't I just use a Variac or variable transformer to get the same results as the 
Amp Preserver. 

There are actually three reasons. First, a Variac weighs about 5-6 times as much as the Amp Preserver.  As a gigging musician, who needs to carry yet another piece of heavy gear?  Try putting a variac in you gig bag sometime.  Second, a Variac usually does not have a voltmeter.  It has an amp meter, which is no help to you.  So you need to wire up some sort of jig to connect to your voltmeter.  More gear to carry.  Third, a Variac can be dangerous to the health of your vintage amp.  All you need is some nerd to come up to the variac and give the dial a twirl to see what happens.  What could happen is that the voltage your amp now gets is 135 volts or more.  With that, you can kiss your output tubes or power transformer good-bye.

3.  Can't I just build my own unit with about thirty dollars worth of parts and accomplish the same thing?  I think I saw the circuit on the internet somewhere. 

If you believe that, then you have not priced quality parts and components lately.  You could build your own if you have the technical know-how, experience, and the proper tools to do so.  The Amp Preserver is built with top quality components and is built for the gigging musician, not your average basement experimenter. 

4.  Can I plug a power strip into the Amp Preserver and use it with
more than one amplifier?

Of course.  You can use any quality surge protector power strip.  Just be sure you do not exceed the Amp Preserver's current capability or you will blow the fuse on the preserver.  

5.  Will I need to re-bias my output tubes when I start to use the
Amp Preserver?

Yes, you should check the bias again now that your amplifier is
operating at the proper voltage.

6.  Will the Tone Preserver or Amp Maniac protect my amplifier from power surges or spikes?

No, if you are concerned about power surges or spikes, you should always use a surge protector.

7.  Will the Tone Preserver or Amp Maniac maintain a constant voltage regardless of my line voltage?

No, if the line voltage fluctuates then you may need to adjust the Tone Preserver or Amp Maniac accordingly.  There are 'constant voltage' regulators on the market, but of course their output is 120 volts.

8.  Is a power cord included with the Tone Preserver or Amp Maniac?

Yes, a power cord is included.

Restore that vintage tone today with the Amp Preserver

 Each Tone Preserver and Amp Maniac is custom made when an order is received.  All metalwork, punching, drilling, assembly, and soldering is done by hand with pride and care.  Therefore please understand that delivery may take 4-6 weeks or longer depening on the number of backorders present.





Vintage Sound Workbench Inc.
14 Sherwood Dr.
Lincolnshire, Il 60069
(708) 609-4050
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