greenleo Posted May 23, 2017 Share Posted May 23, 2017 1 hour ago, jtwrace said: @vortecjr will the ultraRendu include the @Superdad USPCB adapter for the $875? Would you use it? Now all the ports are at the back! Link to comment
greenleo Posted May 23, 2017 Share Posted May 23, 2017 Just now, jtwrace said: I'm not scared to try. Wow, I admire you. I find my cabling would become very clumsy then. Will wait for your impression. Link to comment
greenleo Posted May 23, 2017 Share Posted May 23, 2017 7 minutes ago, jtwrace said: I'm sure @vortecjr will let us know if they come with the ultraRendu as that's the first step. Second step is I'd need to buy an ultraRendu. who/What can stop u? Link to comment
greenleo Posted May 23, 2017 Share Posted May 23, 2017 1 hour ago, JohnSwenson said: Since Jesus has said I can give some info on what has changed with the ultraRendu,here goes: there are foure major changes: 1) bigger size. This allows some of the other changes to happen. The microRendu was designed very small so it could fit behind a DAC with a solid adapter between them. This was done to get the highest Signal Integrity (SI) at the DAC input. Over the lifetime of the project several companies have been producing some short high quality USB cables which makes the "box behind the DAC" concept not as necessary as before. This lets us use a larger box which allows some improvements to the design. 2) much lower jitter clock. When the microRendu project was started really good clocks were large and expensive so the choice was made to go with with a good but not best available clock. At this point we didn't understand how critical this next step in lower noise clocks was for many USB input DACs. But now VERY low noise clocks are much smaller and less expensive than they were (still not cheap, but significantly less than before) so it was decided it was very important to use these in this design. This is probably the most important improvement over the microRendu. 3) replacing switching regulators with ultra low noise linears In the MicroRendu the ultra low noise regulators were used for the clock, the hub, the USB subcircuit in the processor and and the clocking tree in the processor. But the processor core and the memory chips were run from switching regulators. This was done to cut down on the heat generated. If linear regulators had been used for these high current circuits the small case would not have been able to dissipate the heat and would have been too hot. With the larger case there is enough surface area to support the linear regulators for the processor core and memory chips. 4) improved board layout. With a larger board we have been able to layout the processor subsystem such that the power and ground noise it generates bypasses the clock and hub circuits, significantly decreasing their affect on the output jitter. #3 and #4 together prevent the power and ground noise generated by the operation of the processor from affecting the ultra low noise clock, supplying the USB output with a very low noise clock signature. That is about all I can say for now. John S. sounds like an isoRegen in a mR. Link to comment
Popular Post greenleo Posted May 24, 2017 Popular Post Share Posted May 24, 2017 4 hours ago, vortecjr said: It's not appropriate to talk about the design on the UltraRegen here. Also, there are to many variables involved in these combinations that pure speculation is not helpful to anyone. Hi, I do agree pure speculation helps no one and I would like you to realize that lack of info equally helps on one as well. A user holding up his/her resources (say money, time of enjoyment, ...) waiting for an unspecified, undated item given so many great alternatives suddenly came out. For example, should I buy IsoRegen? What if the ultraRendu is just an mR + IsoRegen? I bought the Regen and then mR with no regret because the time lag is long enough. However, if I buy an IsoRegen now and two months later buying the ultraRendu and then finding their functions overlap, I guess I will not be that happy. The short brick that bundles with IsoRegen that claims to the best USB cable virtually cannot work with the proposed ultraRendu chassis,... All of these put anxieties because these are not speculated future issues but something very current. I'm here because I'm your customer and interested in your products. Please don't take my voice as a troublemaker. If we may have an estimated launching date, maybe it helps--I don't know. Certainly the best is the real product or an prototype that may come out for reveal ASAP--like what the mR did. Best. jaaptina, beautiful music, zerung and 2 others 5 Link to comment
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