Those familiar with the previous generation unit will recognize the form factor of the Plus immediately.
Other than its silver exterior, the externals of the unit have not changed much. The entire unit is metal cased, with thick face plates. The biggest external difference other than color is the Logo and position of it as the original had two lines of text near the rear of the unit, while the Plus has a logo and model name a bit to the right of center and a bit further forward.
The front face plate remain the same from the previous generation as does the volume control. The front face still has the three switches on the front, but the input funtion from the original is now the boost function of the Plus with the input switch being moved to the side.
The rear face plate is a bit remodeled with the auxiliary and digital 3.5mm inputs remaining in the same position, but gone is the USB-A input and the Micro-USB charge port, replaced with a pair of USB-C ports for charging and input respectively.
Buttons on the Side, are now input in place of display, SRC, and filter (More on those later).
Those familiar with the XD-05 will be most interested in what changed and the answers are a lot more apparent on the inside than on the exterior of the unit. Starting from the inputs, the USB duties are now handled by the Xu208 which allows for PCM up to 32/384 and Native DSD256 support.
Optical and coaxial inputs are still limited to 24/192 if one can realistically call that a limit. DAC duties are now handled by the AKM4493EQ in place of the 4490 used in the previous generation.
Not all of the features of the chip are usable as the input limits it below its 32/768 PCM maximum and DSD 22.4 mhz max. Clocking is handled by two oscillators at 22 and 24 Mhz respectively. One plus is DSD64 is now supported over coax input unlike the original.
The Op-amp is still seated in a Dip-8 socket to allow for easy swaps, but now the socket is designed to allow use of either One Dual op-amp or two Single Op-amps. TI OPA1612.
I did my listening with the stock op-amp (still OPA1612) and then promptly swapped in a pair of Muses03 and later a single Burson V5i to see what impact they had on sound quality.
For those who already the xDuoo XD05, the XD05 Plus update offers quite a few goodies:
- Twice the power, going from 500wW to1000mW (a full watt) for a 32 Ohm load.
- The operational amplifier OPA1612 is still the same, but now it can be replaced by the user without any soldering required.
- New DAC AKM AK4993EQ instead of AK4990
- USB input with USB-C connector instead of microUSB.
- New USB XMOS XU208 receiver instead of XMOS U8
- Now it supports DSD 64 (DOP) in the optical output.
- THD goes down from 0.0025% to a lower 0.0016%
- Dynamic range increases from 112dB to 117dB
- Bigger battery capacity, from 4000mAh to 5000mAh, for 13 hours lifetime.
I’m only missing a Bluetooth input, as nowadays wireless connection with mobile devices is really usual and convenient. Anyway, if you want the best quality, wired is the way to go and you can use one of the shorts cables included to link your device. xDuoo announces compatibilty with the XD-05BL module, but I would have preferred an integrated receiver, selectable as an additional source.
(Image Credit: DeBilbao on Head-fi)
Inside the xDuoo XD05 Plus you’ll find a bunch of accesories:
- USB-C to USB-A cable to connect it to your computer.
- OTG USB-C to USB-C cable, to connect it to a USB-C device.
- OTG USB-C to micro USB cable, to connect it to a micro USB device.
- Rubber feets to protect the base of the unit and your desk from scratchs
- Rubber pad to place comfortably your mobile over the unit.
- 6,3mm to 3,5mm stereo jack adapter.
There’s no USB-C to USB-C cable to connect it directly to a MacBook Pro, and there’s no USB-C to Lightning cable to connect it to your iPhone. Be aware that Apple product compatibility requires buying separate cables.