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The Paul Hynes SR4 PSU

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I have just recieved my SR4 19v and was considering making up my own dc cable but am unsure of the XLR pin configuration - anyone know this?

Has anyone compared the PH copper dc  to  to the silver dc cable?

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57 minutes ago, dctom said:

I have just recieved my SR4 19v and was considering making up my own dc cable but am unsure of the XLR pin configuration - anyone know this?

 

Pins 1 and 2 are 0V and pin3 and 4 are +V so it is easy to use for example a starquad cable like Canare 4S6 and connect one wire to each pole.


Main system
TAD D1000mk2, TAD M2500mk2, TAD CE-1, Ansuz Mainz 8 C2, Ansuz Darkz D and T2
Tidal Hifi / Qobuz Studio -> Roon ROCK on NUC -> dCS Network bridge -> AES/EBU -> DAC
HD Plex 200W PSU (4 rail for ISP fiber, router, switch and NUC)
 
Second system
Tidal Hifi / Qobuz Studio -> Devialet Silver Phantom, Devialet Tree

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3 hours ago, octaviars said:

 

Pins 1 and 2 are 0V and pin3 and 4 are +V so it is easy to use for example a starquad cable like Canare 4S6 and connect one wire to each pole.

Thats great, thank you for the info.

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Can I ask those of you who have tried fuse upgrades with the 5V-12V SR4 what amp-rating(s) you have have tried?  I should say I am in the UK, which seems to make a difference to the Farad Super3 requirement (1A for 110-120Vac and 0.5A for 220-240Vac) but I have read that Paul Hynes said 1A was fine for the SR4 for both voltages.  

 

I would like to try some of these fuses for myself and currently have a 1A Furutech Rhodium fuse running-in with the SR4 - I’ll give it another week and will report my impressions.  Some of the other obvious options (e.g. SR, Beeswax etc) are very expensive and I don’t want to buy any more than I need to just to experiment with so it would be good to get some feel for what safe/sensible leeway there might be either side of the stated fuse requirement (accepting the possibility of voided warranty with some devices).  For example, I asked Paul if 0.8A would be fine with my SR4, and he said it would be.  I also asked Mattijs about his 15V Farad Super3 and was told that while he thought 1A would be ok it would be at my risk (so clearly a warranty consideration).

 

While I think of it in case I ever want to buy a 9V-19V SR4, is that supply also rated for a 1A fuse?

 

 


Zenith SE > USPCB (5v off) > tX-USBultra 9V (SR4) > Sablon Reserva Elite USB > M Scaler > WAVE Stream bnc > DAVE > Prion4/Lazuli Reference > Utopia/LCD-4/HE1000se

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In the States, I’ve been using a 1A ultimate beeswax at 5V, and even 12V mistakenly for a bit, with great results and no problems with an SR4. What’s not commonly discussed or known is that developers almost invariably specify a fuse size that is well beyond what is actually needed. They do this to take into account what they can’t control: the wide variety of electrical and audio systems being used, and the wide variety of user behavior. Plus, an electrical surge is going to quickly take out most any fuse within reason. If they didn’t oversize, they’d be getting lots of complaints and returns. So I expect you'd be perfectly safe with Paul’s recommendation. I’ve long used 3.15A fuses in Quad actives that call for 2A, and at least for awhile SR fuse users were unofficially told to go high because their fuses were blowing in some systems at the rated value.

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3 hours ago, highstream said:

In the States, I’ve been using a 1A ultimate beeswax at 5V, and even 12V mistakenly for a bit, with great results and no problems with an SR4. 

Thanks.  I’ve been thinking about trying a Beeswax fuse for some time.  I was hoping they had someone in the UK dealing in their fuses, but apparently not.  I imagine the Beeswax fuse improved over the stock in many areas but where there any tonal changes.  I’ve read that Beeswax fuses have a warm signature, and I’m not sure I want my SR4 to be much warmer.


Zenith SE > USPCB (5v off) > tX-USBultra 9V (SR4) > Sablon Reserva Elite USB > M Scaler > WAVE Stream bnc > DAVE > Prion4/Lazuli Reference > Utopia/LCD-4/HE1000se

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18 minutes ago, str-1 said:

Thanks.  I’ve been thinking about trying a Beeswax fuse for some time.  I was hoping they had someone in the UK dealing in their fuses, but apparently not.  I imagine the Beeswax fuse improved over the stock in many areas but where there any tonal changes.  I’ve read that Beeswax fuses have a warm signature, and I’m not sure I want my SR4 to be much warmer.

 

I have used Beeswax fuses in linear power supplies and don't consider them to be overly warm.  Mostly, I find them smoother and more liquid sounding than SR blue fuses, which have more energy and greater transparency in comparison.  I mostly prefer the Beeswax fuses in those power supplies, but my choice also depends on the component being powered.

 

You might consider trying a blue fuse with your SR4.  If you like it, then don't worry about the Beewax.  SR offers a 30-day money back guarantee that removes all of the financial risk except for shipping.  I would guess they have a dealer somewhere in the UK.  The rule of thumb for the blue fuses is to order 1.35-1.6x the rated amount for your device.  I do the same with Beeswax fuses in order to avoid a blown fuse.  I haven't had any issues using the higher rated fuses.


 

 

 

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58 minutes ago, str-1 said:

Thanks.  I’ve been thinking about trying a Beeswax fuse for some time.  I was hoping they had someone in the UK dealing in their fuses, but apparently not.  I imagine the Beeswax fuse improved over the stock in many areas but where there any tonal changes.  I’ve read that Beeswax fuses have a warm signature, and I’m not sure I want my SR4 to be much warmer.

 

I agree with audicgf's appraisal of the beeswax -- modestly warm, liquid and smooth -- and you could contact Jerry at Audio Magic directly about buying one; he uses PP.  Or Kitsune Hi Fi near Seattle, which gives $20 off.  However the idea of trying a SR Blue on 30-day is not a bad one, if available. In my system, pre-SR4, I found the Blue has great PRAT, but once I got past that found that its tonal coolness ("neutrality") left me wanting to thrown my kit out the window. I like warm, not syrupy but the kind that draws me in emotionally so that I'm listening to the music, not the system.

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2 hours ago, auricgoldfinger said:

You might consider trying a blue fuse with your SR4.  If you like it, then don't worry about the Beewax.  SR offers a 30-day money back guarantee that removes all of the financial risk except for shipping.  I would guess they have a dealer somewhere in the UK.

 

1 hour ago, highstream said:

However the idea of trying a SR Blue on 30-day is not a bad one, if available. In my system, pre-SR4, I found the Blue has great PRAT, but once I got past that found that its tonal coolness ("neutrality") left me wanting to thrown my kit out the window. I like warm, not syrupy but the kind that draws me in emotionally so that I'm listening to the music, not the system.

Thanks.  The SR fuses are readily available in the UK with a generous return period so it sounds like I should give those a try before beeswax.  But I have emailed Jerry at Audio Magic to ask about warranty terms as I cannot find these mentioned on their website.   

 

Before going for either SR or Beeswax I’ll will of course properly evaluate the Furutech with both the SR4 and my Farad Super3, and I’ll post something about that in the next week or so.


Zenith SE > USPCB (5v off) > tX-USBultra 9V (SR4) > Sablon Reserva Elite USB > M Scaler > WAVE Stream bnc > DAVE > Prion4/Lazuli Reference > Utopia/LCD-4/HE1000se

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17 hours ago, str-1 said:

Thanks.  I’ve been thinking about trying a Beeswax fuse for some time.  I was hoping they had someone in the UK dealing in their fuses, but apparently not.  I imagine the Beeswax fuse improved over the stock in many areas but where there any tonal changes.  I’ve read that Beeswax fuses have a warm signature, and I’m not sure I want my SR4 to be much warmer.

Probably because having a fuse with a flammable material inside it breaks every electrical regulation... A device that when it works gets hot... One reason fuses are often filled with sand is to control the flashover...

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