小而豐滿的內在真是讓人興奮。遠遠就看到那個ESS晶片，這麼小的體積，以DAC來說，這顆環型變壓器超出誠意了，內部各個部份都有隔離區分，井然有序。仔細看，ESS那個解碼中心有下上兩層線路喔，Invicta共使用了兩顆32 Bits ESS Sabre晶片。
特地挑了DSD 5.6, DSD 2.8, RR 176.4(WAV與AIFF), 還有MP3。
輸入要切換到SD Card Audio。
WAV與AIFF都可，但MP3，很抱歉，太Low End，沒支援！另外也試聽了耳擴的部份，共有兩組，尚未看這兩組有無不同。先接再第一組，兩組都有單獨的開關，不用可以關上，藍燈是指示燈。推Sennheiser的HD 800，沒想到效果相當好，推力足夠，各頻段包括音場都有推開，很是厲害，若要吹毛求疵，就是低頻的量少了一點點。
Up-sampling Filters in the INVICTA rev 3.0 Software
• The internal Fast Roll-off filter pre-installed in the Sabre DAC.
On the OLED display panel this appears as “Sabre Fast Roll-Off” This is a ‘classic’ FIR filter with symmetrical coefficients, hence it is linear phase and nondispersive.
It achieves excellent suppression of -115db, and so has to have a relatively large group delay of 35 samples. That means, that for a CD at 44.1Khz the group delay is about 800uS. (less for higher sample rates). This filter exhibits pre-ringing, but achieves perfection in rejection: no sample rate artifacts above 22.05Khz are present in the output.
• The internal Slow Roll-off filter pre-installed in the Sabre DAC.
On the OLED display panel this appears as “Sabre Slow Roll-Off” This filter is designed to reduce the group delay present in the Fast Roll-off filter. It is a symmetrical impulse response (i.e. it has symmetrical coefficients), it is linear phase and non-dispersive. It achieves good rejection but the rejection begins slowly, 24Khz or so is
present in the output if the music content has signals near 20khz, but signals higher than that are suppressed. The group delay however is much less, being only 6.25 samples or 140uS at 44.1Khz. This filter also exhibits pre-ringing.
• Resonessence designed, Minimum Phase, IIR Filter
On the OLED display panel this appears as “Minimum Phase IIR” This filter is designed from an analog filter prototype and exhibits no pre-ringing at all. To achieve this, it has to compromise the steepness of the filter; it corresponds to a fourth order analog filter. This is a dispersive non-linear phase filter, but the dispersion has been optimized to the absolute minimum consistent with no pre-ringing.
• Resonessence designed, Minimum Phase Slow Roll-off.
On the OLED display panel this appears as “Minimum Phase Slow Roll-Off” This is a FIR filter that exceeds the specification of the above IIR filter achieving -100db stop band. It is not a linear phase filter because it has non-symmetric coefficients but has been designed to exhibit virtually no pre-ringing (but it does have some) with the minimum of dispersion.
• Resonessence designed, Linear Phase Apodizing Filter.
On the OLED display panel this appears as “Linear Phase Apodizing” Perfectly symmetrical impulse response, hence linear phase and non-dispersive, this filter achieves a high -96db rejection at fs/2 and exhibits the minimum of pre-ringing possible while achieving this excellent rejection. This is the preferred filter of many of our beta-testers.
• Resonessence designed, Linear Phase Fast Roll-off
On the OLED display panel this appears as “Linear Phase Fast Roll-Off” The ultimate FIR filter in the ‘classic’ linear phase category. This filter delivers ultra-high suppression of -120db and extreme flatness in the band. It exceeds the performance of the Sabre DAC pre-installed Fast Roll-off filter.
• Resonessence designed, Linear Phase Slow Roll-off
On the OLED display panel this appears as “Linear Phase Slow Roll-Off” Designed as an enhanced version of the preinstalled Sabre DAC Slow-roll off filter, this is a
linear phase, hence non-dispersive, low group delay filter that has less ripple in band and higher rejection that the Sabre Slow Roll-off filter