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APS audio transformers

Custom audio transformers

Vocm Mod analog board NO LONGER AVALABLE

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NO LONGER AVALABLE.  Only complete units can be modded.  There are too many issues with these older units and need to be gone over and issues repaired.


You send us your analog board.

We will install the Vocm Mod and your new transformers if purchased.  You must pay for return shipping.  We will contact you for return shipping cost.

With this option we cannot test the unit and check for other issues therefore we recommend sending in the complete unit.

This price includes the Vocm caps.

About Us

We have been designing and building custom upgrades for the directstream DAC since 2019


You can read some reviews and find out some more info about our products here and here



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We are located in the

Baltimore / Washington area