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2013 Ampeg V-4B 100W Reissue Pt2

V-4B and SVT-212AV. :cool:

Some people have all the fun!

When you test an amp like this, do you test it as received or do you perform any adjustments such as optimizing the power tube bias setting first? The reason why I ask is that some companies like to set the bias conservatively to prolong power tube life. This may not be the setting that makes the amp sound as good as it can.
 
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Some people have all the fun!

When you test an amp like this, do you test it as received or do you perform any adjustments such as optimizing the power tube bias setting first? The reason why I ask is that some companies like to set the bias conservatively to prolong power tube life. This may not be the setting that makes the amp sound as good as it can.

Unless we find an amp set with the bias way off (or the amp has been damaged, or something else is amiss), we typically test them in the condition they are in upon arrival.
 
Unless we find an amp set with the bias way off (or the amp has been damaged, or something else is amiss), we typically test them in the condition they are in upon arrival.

You never know if something is changed as a result of being bounced around during shipping.

I suppose that the manufacturer would want you to do no more than ensure that the amp is calibrated to their specifications. In the case of the v4B, adjust the bias for 450mV across the 6L6GC cathode resistors @ 120VAC in North America.
 
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