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  1. Rob Watts

    Watts Up...?

    Davina got stalled with a key part no longer being available, and the pressure of other projects. So I have come up with a better method that removed this part, will be testing the concept towards the end of the year.
  2. Rob Watts

    Hugo TT 2 by Chord Electronics - The Official Thread

    So +0H would give you about 2.25W into 8 ohms; you need +7H to give you 7W at 0dBFS. As to +10H it depends upon the source. So with CDs, you can't go above +7H, as it's likely to clip. But if you stream video, or use Blu ray sources, you can comfortably go to +12H, as there is often a 6dB...
  3. Rob Watts

    Watts Up...?

    I ought to add, that listening to WTA filters above 16FS (different tap lengths, different oversampling) does have different sound quality improvements. With the M scaler, you get improvements in tempo, pitch reproduction, timbre variation and instrument separation and focus; above 16FS so far I...
  4. Rob Watts

    Watts Up...?

    So the area of the error relates to the sample rates - so a 768kHz signal would have 256 times less transient error innately, expressed in area, than a 48kHz signal. So as you go up in incoming sample rate, the errors improve markedly. This is why higher sample rates sound better, as the area of...
  5. Rob Watts

    Watts Up...?

    When I saw the Stereophile review of Dave I was shocked and horrified to see the results - particularly the 16bit -90.31dB plot. So I requested the exact same unit back, so I could measure it myself - and Chord kindly shipped the unit back to me, and replaced the US distributors' Dave. And I...
  6. Rob Watts

    Watts Up...?

    So where are these APx 555 plots that show better performance?
  7. Rob Watts

    Watts Up...?

    I spent a lot of time analysing the leakage current and building up a SPICE model to characterise it. It's not audibly important, as the bulk of it is 100Hz, and easily extinguished within the DAC by a low impedance ground plane. The HF components are negligible. Please don't talk about new...
  8. Rob Watts

    Watts Up...?

    I don't have any specific recommendations for an ADC - but if you do go down the path of getting an ADC, go for as high a sample rate as possible, preferably 768kHz. I will be testing my pulse array ADC soon, and if that goes well - please note big if - then a unit will be available to support...
  9. Rob Watts

    CHORD ELECTRONICS DAVE

    Dave will drive the Stealth with ease - with max volume you would get an ear damaging 125dB SPL from Dave...
  10. Rob Watts

    Watts Up...?

    Jarnop answered perfectly for you. As to suitable cabling, you just need to cable using the headphone outputs, or the RCA phono outputs with loudspeaker cable.
  11. Rob Watts

    Hugo TT 2 by Chord Electronics - The Official Thread

    TT2 in high or low gain doesn't have any significant DC output due to the action of the digital DC servo, so it's perfectly safe to use with a DC coupled power amp.
  12. Rob Watts

    Watts Up...?

    I did say I can't give more details! Research is ongoing, but I have made a huge amount of progress so far in a number of different areas. You will have to wait till later next year to hear the results - but I can say that it will be another xM scaler intended to match Dave...
  13. Rob Watts

    Watts Up...?

    Afraid not - it's not one of my projects. I can't give any details, but I had previously disclosed that much more complex M scalers is something I am working on, amongst other projects.
  14. Rob Watts

    Chord Electronics - Hugo 2 - The Official Thread

    I must have missed that when I proof read the manual. It should read that the HF filter is mostly for HD sources - so anything above 48k PCM and DSD. I recommend filter 2 for both DSD and all PCM, but the benefits at 44.1k is smaller - it's the higher sample rates where the bigger benefits come...
  15. Rob Watts

    Watts Up...?

    If it's an "audiophile" USB cable, all bets are off. If it's a certified generic high speed USB cable, it should be length independent - although I haven't ever been longer than 2m myself.
  16. Rob Watts

    Hugo TT 2 by Chord Electronics - The Official Thread

    TT2's coax input receiver is still powered up and working when in standby, so there is no problem at all in doing this.
  17. Rob Watts

    Chord Electronics - Hugo 2 - The Official Thread

    The LCD-4z is an easy load for Hugo 2 to drive - my calculations give 130dB SPL at clipping - which is ear damaging levels. So it certainly does not need more power from Hugo 2.
  18. Rob Watts

    Chord Mojo DAC-amp ☆★►FAQ in 3rd post!◄★☆

    I had no involvement in Poly, but 5V 2.1A USB PSU should be fine charging Poly and Mojo.
  19. Rob Watts

    Chord Mojo DAC-amp ☆★►FAQ in 3rd post!◄★☆

    Absolutely not. USB charging MUST conform to USB power standards of 5v +/-0.25v, otherwise if greater than 5.5v you will destroy Mojo. There are efficient charge pump circuits inside Mojo to create the larger voltages required internally.
  20. Rob Watts

    Chord Mojo 2: Speculation Thread

    Nice try - but I wouldn't want to spoil the speculation on this thread!
  21. Rob Watts

    Chord Mojo 2: Speculation Thread

    All of Europe, Brazil, South Africa, China, Iran and India are prohibited. With Delta Covid taking off in SE Asia and Japan, it will not be long before these countries are added, or the policy changed. I think more restrictions are likely, as Covid looks like getting worse within the US. Delta...
  22. Rob Watts

    Chord Mojo 2: Speculation Thread

    Sadly I am not sure Chord or I will be allowed to attend CanJam Socal. Current USA restrictions prohibit UK citizens from visiting the USA - in spite of vaccinated US citizens now being allowed into the UK.
  23. Rob Watts

    Chord Electronics Qutest DAC - Official Thread

    I had no involvement with poly, so I don't know the charging requirements, but I suspect it would be fine.
  24. Rob Watts

    Watts Up...?

    Some years back I was in Bali for a week; the TT2 had more leakage than usual, and it turned out the mains was 316v RMS. No failures for a week's operation. That would be one hell of a surge voltage for Canada. If you are worried about mains surge voltages, then use mains suppressors. As to...
  25. Rob Watts

    Watts Up...?

    Actually, it is not phase shift itself that is important - and it's not that that I measure - but phase shift with amplitude. So I run an FFT of my digital modules, with an input at 0dBFS, and record the absolute value of amplitude and phase at 6kHz. Then I take my 6kHz signal and attenuate it...
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