Cart (0)

APS audio transformers

Custom audio transformers

We are currently having a sale on our top of the line Signature Series PLUS DAC that includes

our our R-Core APS internal power supply installed in Our Signature Series units. 

The PLUS upgrade normally cost $829.

Signature Series PLUS sale $4,394 less trade in.  We have both Silver and Black units available.

*While supplies last*.

Signature Series PLUS upgrade

{{opt.value ? '' :}}
{{opt.value ? '' :}}

If you are seeking the very best sounding DAC you might be interested in our new Signature Series PLUS.

It includes everything in the Signature Series PLUS a super high quality internal linear power supply for the analog board.  It includes isolating filters from the digital supply.  This upgrade ads even more fine detail and increased REAL factor.  Percussive instruments sound so real and dynamic.


We have been working on finding the very best supply for this application and we feel we nailed it.

We use the complete bottom of the DAC for the heat sink keeping the internal temperature low. We use only the best capacitors and diodes available as well as using a high quality discrete circuit with a MOSFET (attached to the bottom of the unit) to regulate the voltage. The R-core transformer is icing on the cake and is very low noise especially with the thick copper flux band.

Add this upgrade to our Signature Series.

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



Contact Us

Please leave us a message.

Name *
E-mail *
Message *

We are located in the

Baltimore / Washington area