APS audio transformers

We will upgrade your unit to the Signature Series.  You just send us your unit and we will perform the upgrade.  You pay for return shipping.

We have developed one of the best sounding DAC to date.

This is the Level 2 upgrad. $2495

1) Transformer replacement. Replaced the Edcor 150 150 cheap transformers with premium Nickel APS Audio R2 Transformers designed to meet extreme audiophile requirements. These transformers also brings up the gain to standard levels.
2) VOCM upgrade. The VOCM of these units did not have a low enough impedance for the video opamps used. We corrected this by adding very high quality SMD caps. on each opamp power circuit which lowered the impedance the correct amount.
We also replace all 1% thick film resistors with 0.01% thin film resistors as part of our signature series upgrade.
3) RF/EMI shielding was added where needed This lowers any noise from entering critical circuits.
4) Performed DC offset tune. Lowers low frequency distortion and increases dynamics.  This works together with our new R2 transformers.
5) Set of Digital Noise Eliminators. (1-USB-B & 1-HDMI i2s)
6) In the stock power supply we tighten re-attach Power Transformer (All come loose at the base)  We replace the rectifier diodes with ultra-fast recovery diodes and seporate the 5v regulators to alow the digital input board it's own power clean low noise regulated source.

We take a stock MK1 and compleatly refurbish it with our new Rev 2 transformers, RF shielding, Power Supply upgrades including Tighten re-attach Power Transformer (All come loose at the base)
, Our Digital noise eliminators.and tune the DC offset.

What you get is an incredable sounding DAC that outperforms even the newest MK2 DAC even with our nickel transformers installed.  The Signature Series can be idenified by the new APS Audio Badging on the front.