E1DA PowerDAC v2.1 Headphone Amp PEQ DSP BLE DAC with 2.5/3.5 Adapter and Cables

PowerDAC v2.1

The newest PowerDAC for the Head-fi universe is released! It is pretty much the same device as PDv2, however, now PowerDAC can work with unbalanced headphones as well. HPToy iOS/Android app was modified to get the switch for 3 output modes:

1) Balanced – the same as PDv2 balanced 2.5mm TRRS up to 600mW/channel output

2) Unbalanced – you can use that mode with E1DA 2.5/3.5mm adapter to drive your unbalanced headphones, however, power in that mode is lower vs Balanced mode

3) Unbalanced Boost – the same as Unbalanced with full 600mW power but with some crossfeed effect. This is the price for the versatility of a single 2.5mm TRRS output

Also, PDv2.1 got the new USB audio bridge CT7601 Comtrue, instead of Cmedia which was far from ideal.

PDv2.1 has a soft-start function to avoid high inrush current, in fact, PDv2 may work with any Android phone without Y-splitter, if you wish to use such a power-hungry device with your phone.

PowerDAC v2

Note: Before you buy this product, please read the FAQ carefully.

No 2.5/3.5mm jack adaptors allowed! You can kill the DAC.

https://e1dashz.wixsite.com/index/faq

If you have any questions or suggestions, please join us on discord app. The designer Ivan is on line and many users there.

https://discord.gg/U9Z28KC

PowerDAC v2

You can call it USB DAC + Headphone amplifier(HPA) >600mW@15ohm but actually, PowerDAC has no HPA at all.

Yes, PowerDAC V2 can, as an example, drive LCD3 with 600mW but only as powerful enough DAC, no analog amplification and no feedback are implemented there.

It’s a quite similar to Fully Digital power Amplifiers(FDA) like Sharp SM-SX100(probably earliest FDA), TACT-Millennium, Lingdorf, Wadia etc $5-10K legendary toys.

PowerDAC V2 uses the same or similar Ti digital PWM modulator chip TAS5558 but of course different output stage for headphone.

PowerDAC V2 doesn’t need drivers to convert stream PCM up to 24/192 from PC/Mac. iOS, Android or Linux, however, if you wish to get full control of the built-in DSP, you need to install iOS or Android app.

A few reasons why you could wish to use the app:

a. Volume slider with classical Fletcher–Munson loudness curves

b. Familiar HiFi Bass/Treble sliders

c. Intuitive controllable filters i.e. 7 parametric EQs, left/right gestures control frequency, up/down gain, zoom in/out Q-factor. Also available LPF/HPF and APF for phase alignment and text form Biquad control just in case(actually, it comes from another my project HiFiTOY crazy-tiny 250W@4ohm PowerDAC where LPF/HPF/APF needed for bi/tri-amping)

d. Compressor/Limiter, I believe this function really useful for an open back planars to