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Torii Mk III ?'s for Steve, might to useful to all (Read 937 times)
JLM
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Torii Mk III ?'s for Steve, might to useful to all
12/29/10 at 22:13:17
 
The Torii Mk III seems to have nearly everything I'd want in a tube amp, but I have some questions:

The standard rectifier tube is a 5U4G, but a 5AR4 or 5YGT can be substituted.  What is the cost for these tubes, how much to substitute at the time of amp purchase, and most importantly how does the performance change between these tubes?

It says that the different voltage regulator tubes affects the amount/tightness of bass.  What is the cost for these tubes, how much to substitute at the time of amp purchase, and most importantly how do I pick betweem them?

Why does the stepped attenuator option cost an extra $250 (seems out of line with the rest of Decware pricing).
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Steve Deckert
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Re: Torii Mk III ?'s for Steve, might to useful to all
Reply #1 - 12/30/10 at 18:21:16
 
Quote:
The standard rectifier tube is a 5U4G, but a 5AR4 or 5YGT can be substituted.  What is the cost for these tubes, how much to substitute at the time of amp purchase, and most importantly how does the performance change between these tubes?


The rectifier tubes range in price between $20.00 and $40.00 ea.  The 5U4 and 5AR4 have less of a voltage drop whereas the 5Y3GT has a bit more voltage drop.  The voltage drop changes the operating points throughout the amplifier including how the amp is biased, so you hear a subtle change in warmth from one rectifier tube to another.   There is no substitution at the time of purchase, the amp will be sent out with the 5U4 to establish a point of reference.  From there you can purchase different rectifiers if you like and see what they do to the sound of the amp.

Quote:
It says that the different voltage regulator tubes affects the amount/tightness of bass.  What is the cost for these tubes, how much to substitute at the time of amp purchase, and most importantly how do I pick betweem them?


The cost of the VR tubes is about the same as the rectifiers.  Again, the amp will be shipped with the OA3 and OC2 to establish a point of reference.  From there you can purchase alternate tubes and see what they do.  To pick between them is purely subjective.  The differences between these tubes is voltage related, so similar to the rectifier tubes, there is a voltage drop.  The OA3 has a least voltage drop while the OD3 has the most.  To experiment with these you could buy an OD3 and compare it with the OA3 the amp comes with.  See which one you like better, and if you wish the change would have landed somewhere between the two, then get an OB3 or OC3 and see how that sounds.  As a general rule the OA3 will have the best performance, while the alternates will mellow the amp and warm the bass.

Quote:
Why does the stepped attenuator option cost an extra $250 (seems out of line with the rest of Decware pricing).


The stepped attenuator is a dual ganged attenuator serving both channels. We charge $100 labor to install the control. This requires us to modify the chassis for the control, and shorten the shaft of the control so it will work with the TORII MKIII knobs which also have to be modified to work on the shaft.  Our cost on the control is $149 plus shipping.

Steve











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JLM
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Re: Torii Mk III ?'s for Steve, might to useful to all
Reply #2 - 12/31/10 at 10:51:03
 
Thanks Steve, that clears things up for me and I hope others.  

Always a hoot to get an answer from the man himself.   Cool
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