本帖最后由 hitmanx 于 2019-3-18 13:07 编辑
一些出处:
设计师Rob谈Hugo TT的板子
https://www.head-fi.org/threads/chord-hugo-tt-high-end-dac-amp-impressions-thread.756029/page-2
No they are not the same board. The Hugo TT board has been modified to add the galvanic isolation, and has a much better and completely new reference circuit.
The reference PSU gives 4 dB lower THD and noise, and much lower levels of noise floor modulation. The difference in SQ is not small.
https://www.head-fi.org/threads/chord-hugo-tt-high-end-dac-amp-impressions-thread.756029/
Just to reinforce recent comments - the production TT boards do indeed measure much better - THD and noise is 4 dB lower at 3v RMS, which is a considerable measured change.
In my opinion, it's certainly not a small difference in sound quality - in terms of scale, I can hear the improvement as soon as one plugs it in - you certainly do not need to do careful AB tests to hear the change. But of course that's just my opinion and we all have different sensitivities and tastes, so try it out for yourself.
“对于最近的评论我想强调一下,TT的制品版确实测量起来好很多(much better),THD和noise在3v RMS时低了4dB,这应当被认为是一个不小的测量差距。
在我的观点中,两者之间音质的差距已经不能算小了--这个差距我可以一耳朵听出来, 你肯定不需要做仔细的AB测试去区分两者。当然这只是我的观点,我们有不同的敏感程度和对声音的品味,所以最好你自己去听“
Moon audio归纳的两者之间的差别:https://www.moon-audio.com/blog/chord-hugo-versus-hugo-tt-differences-explained/
The Hugo TT (Table Top) is a larger desktop audio device offering greater connectivity and an increase in resolution over the Hugo including: - Galvanic isolation on the USB. This stops RF noise from the source creating noise floor modulation within the analog electronics. It also prevents signal correlated but distorted ground currents from corrupting the small signal distortion performance. The SQ benefits are smoother and warmer SQ with better instrument separation and focus, and better sound-stage depth. Our galvanic isolation runs through all resolutions whereas a lot of isolators will only run up to 96k.
- Beefed up OP stage - increased bias current. This means that with lower impedance headphones it will be in Class A for more time, making it sound smoother.
- Beefed up power supply - double the batteries of Hugo and addition of super caps (10,000,000uF (microfarads) of supercapacitor energy storage) reducing power supply impedance.
- Improved reference circuitry - lower impedance and noise. This has the benefit of reducing THD and noise by 4 dB at full output.
- Chassis machined from a solid block - reduces effects of vibration.
- Plus you have the usual features, remote control, balanced OP for power amps etc.
- Hugo TT also has memory recall of the input selection after switching off.
- The blue tooth reception has been increased to a ninety feet maximum.
- There were also changes to the reference voltage power supply's of the pulse arrays, but no changes to any program algorithms.
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