What are the differences between a STAX SRD-7 Pro and SRD-7/MKII?
Jul 21, 2009 at 12:01 PM Post #2 of 11
Basically the SRD-7 Pro has two Pro outputs, whereas the SRD-7/Mk2 has one Pro bias and one Normal bias output, allowing you to use both normal and pro bias phones.

Hope this helps.
smily_headphones1.gif
 
Jul 21, 2009 at 12:22 PM Post #4 of 11
Apart from the different outputs (details above), there are external color differences as well.
The SRD-7 Pro are all-black, while the SRD-7MK2 have silver (aluminum) front plate.

Here are the three different SRD-7 models (no SB units).
27710723.jpg
 
Jul 21, 2009 at 9:45 PM Post #8 of 11
Quote:

Originally Posted by gilency /img/forum/go_quote.gif
How about the SRD-7 SB?


Two Normal bias output.
SB = Self Bias. Meaning that it take bias voltage from the speaker level input, instead of the regular mains power (wall plug)
 
May 26, 2021 at 2:32 PM Post #9 of 11
Quote:

Originally Posted by gilency /img/forum/go_quote.gif
How about the SRD-7 SB?


Two Normal bias output.
SB = Self Bias. Meaning that it take bias voltage from the speaker level input, instead of the regular mains power (wall plug)

SBmk2 has both normal and pro outputs.
 
Aug 14, 2021 at 4:17 PM Post #10 of 11
Self-biasing -> No wallwart needed

As far as I know, the Mk2 is the best model because it has upgraded components to the other ones.

Do you mean that a regular Mk2 is better than Pro-only?
 
Aug 15, 2021 at 1:55 AM Post #11 of 11
Do you mean that a regular Mk2 is better than Pro-only?
"Mk2 was upgraded with better copper (PC-OCC) both in the wiring and the windings of the transformer. It does make a bit of difference but not enough to get crazy about it and you will gain much more by bypassing the circuit board inside the unit and upgrading the wiring with some nice solid core silver or copper."
 

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