I think your right. This is the official spec of the Ele dac on ebay.
Main technical parameters: compatible the USB 1.0 16bit support 32 KHz / 44.1khz / 48khz sampling Dynamic range: 100dB noise signal ratio： 105db （faith typical values） THD + N: 0.002% Internal integrated independent 12MHz clock generator built-in 8 x Oversampling digital filter Adopt double power supply.Analog part is + 5V , Digital parts for + 3.3 V SSOP- 28 encapsulation The chip adopt the famous PCM2704 , Uses metal film resistor, capacitance, polypropylene capacitor, double panel design, the USB interface provide power supply , output directly meet headphones.
This is the Spcs for the Hifimediy Sabre Dac
This small and simple dac uses the ES9023 dac chip from Sabre with SABRE DAC technology. It's is a quite new chip that features outstanding audio quality in a simple implementation. The ES9023 dac chip has a driver built in which outputs 2Vrms line level signal,and are able to drive low impedance loads like headphones, but at 32ohm the output power is reduced to 1Vrms, so connecting to an amp/preamp is recommended. The new batch uese the LT1763 low noise regulator. This DAC chip does not have any DC voltage at it's output, eliminating the need of a DC coupling capacitor at the output. With patented HyperstreamTM architecture and Time Domain Jitter Eliminator, the ES9023 delivers jitter-free studio quality audio with 112dB DNR. With this DAC we combined the Sabre DAC chip with the quality Tenor TE7022 USB receiver. It accepts up to 96khz/24bit input signals from USB, and it will upsample lower input signals to feed the ES9023 dac chip with 96/khz/24bit signal. This makes it possible to get a great dynamic range of 112db. (in case a 16 bit receiver like pcm2706 were used it would have been limited to 96dB.) It responds to changes in system volume control (on MAC with volume hotkeys). No drivers required for Windows, Mac and Linux. Output on 3.5mm headphone jack.
The output on the Ele looks like it is using some power in the output and it says on there the Hifimediy uses none which would explain the volume difference in the two.
Can't seem to use firefox today at headfi for some reason. Whacky.
Edited by Dsnuts - 11/29/12 at 2:05pm