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The stock sound, without the bass switch active, offers a smooth appeal overall. With bassy headphones, again, my Fostex TH-X00 being the best test subject in my arsenal for low-end testing, the XD-05 performed just fine.
No, it doesn’t do the headphone justice in a quantity sense of the word. This DAC/AMP feels very flat on the low end and does not add much in the way of depth until the bass boost switch is activated. On a flat EQ (no EQ on your music source) this device will boast a more pure feel with a lacking sense of quantity. The quality aspect of the sound comes across as very good for the price. At just $210, the purity factor is very nice, indeed.
(Image credit to Headfonics)
Physical slam factor, the “wince effect” is moderate on this unit. Meaning, if the track calls for it and when using a bass-heavy headphone, the XD-05 can strike a bit harder on the low end than I am comfortable with. I don’t want extra slam, I want extra depth and a sense of guttural, abyss reaching low-end. More broadness. More texture and something of more auditory value.
The quality of the experience degrades noticeably with the bass boost switch active and especially so if you are using an EQ on your music source that is set up with some added dB’s on the low side of the spectrum. Again, for the price at $210 or so, this is more than acceptable quality across the board. I am just not fond of the physical dynamic kick with “slamming headphones” like the Fostex TH-X00.
Comparing to just my portable players from Xduoo that I’ve reviewed in the past, the XD-05 feels like it hits too hard. Even when trying as best I can to adjust the volume to the best of my abilities, I am unable to get the same slam effect on the portable music player as I am when connecting that same player to the XD-05. It is all about tonality. The XD-05 simply has plentiful energy. That isn’t a bad thing. It doesn’t hit hard or very annoyingly so, it just isn’t a soft and subtle sound in terms of dynamic punch on the bass end.
With a body made of Aluminum Alloy, the XD-05 is in fact more lightweight than it appears, coming in at a mere 270g weight makes the XD-05 a great portable desktop solution and with a lengthwise form factor makes it even more constant handling-friendly.
I’m not a fan of stacking but with a carefully designed silhouette attributing to the rounded corners and a sandblasted finish makes the XD-05 acceptable. I can carry it around since it fits most horizontal pockets on my backpack and I’d greatly appreciate if they added a velvet pouch for it so I can store other gears on that horizontal pocket.
(Image credit to Johnny Mac on Head-fi)
The XD-05’s front panel features a 0.91 inch OLED screen that shows a collection of battery, audio format, input signal and digital filter indicators.
On the left side of this OLED screen is a 6.5mm output jack with a 500mW (32Ω load) Output power and to its right is the Volume knob doubling as an ON/OFF switch and finally, towards the bottom of the OLED screen are three toggle switches for the INPUT (OPTICAL/COAXIAL, USB IN and AUX IN), BASS BOOST (ON/OFF) and GAIN (LOW, MID, HIGH). 4 Allen screws are also present with great ease of access in case you would are open to modding the XD-05’s stock Operational Amplifier (OP AMP).
Reference-audio-analyzer.pro ( Check the test data here)
Test report – general data of xDuoo XD-05 Default as AMP mode
Frequency response, Impedance and Frequency response with standard headphones
The maximum level of voltage from the musical power
Features & Specs
The xDuoo XD-05 rivals larger desktop devices in terms of input and output options. It can drive headphones, but thanks to the aux output it can also drive powered speakers and other devices (e.g. dedicated headphone amplifiers like the iFi xCAN). It is quite flexible, although it does not offer a pre-out mode to adjust the volume on the aux output.
In terms of inputs, the xDuoo XD-05 mirrors much of its output flexibility by offering a decently wide range of inputs. It can be used with the standard USB input, which offers the largest flexibility in terms of supported formats and sampling rates, but also with SPDIF (both coaxial and optical).
The amplifier stage can be used on its own thanks to the aux input, so one can use a different DAC or other device (e.g. a DAP) as the source. The USB port is a full-size male connector so that it is possible to use OTG cables to connect the XD-05 to phones, tablets, DAPs and other portable devices.
(Image credit: soundphilereview)
The xDuoo XD-05 seems to shut off some internal components, as it emits a “click” when it starts playing and then it takes less than a second for the sound to come out. This means that when one starts playing something it will cut off the first instants of the track. There’s apparently no way around this fact.
The display button on the side allows one to turn the display on or off; long-pressing the button turns the display off and lights up a LED on the front.
The “SRC” button allows one to re-sample the audio stream to 48 kHz, 96 kHz or 192 kHz, or to leave the stream as it is; this feature is only available when using SPDIF input.
My advice is to leave it on “pass” as re-sampling always involves some form of processing that would be better to avoid. The last button, the filter one, allows one to select the filter to apply to the signal.
There are seven in total: sharp roll-off, slow roll-off, short delay sharp roll-off and short delay slow roll-off for PCM streams; reserved cut off filter, 50k cut off filter and 150k cut off filter for DSD streams.
Telling the difference between them is really difficult and not always possible, as the differences are really small.
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