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Post by pcourtney1 on Apr 12, 2012 18:17:22 GMT
need some advice please, I use a very nice (10 year old ups with new batteries) that outputs a super clean "sine wave" AC to 6 kettle lead inputs, and it powers my Yamaha AV Receiver RX-V1065, other Panasonic stuff needed for the lounge to play movies etc
I have one spare input reserved for my X-Cans, I am pretty sure the cheap stock MF psu it came with can be bettered, AC Adaptor Model F34ADT, output AC 12V 500mA
I don't need any clean up of the electrical signal, or spike protection etc, I have tested the ups output and it is medical grade quality AC, but a good simple Toroidal based psu between the X-Cans and the UPS would be I think the route I should be exploring, any thoughts on this by anyone 10x more technical than me would be very welcome
Am also wondering if the X-Can can be modded to take more output (higher voltage) so that my favourite 400ohm headphones will benefit, possibly at the same time modding it to output 120ohms as well
please be gentle, am not technical even though I am in IT & Computers (but that does not say a lot) :-)
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XTRProf
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Post by XTRProf on Apr 12, 2012 20:02:18 GMT
Yes, that's what I'm planning as well pending time. Just get a good high VA toroidal to output AC will for sure up the sound quality of the V2. I'm more Americana style when it comes to Hifi and so my requirements may be over the top to Alex and Frans disagreements. I'm not the experts. They are. But many of the best sounding Hifi are from America. Btw, I will prefer a R-core over a toroidal. I may even try a C-core if I can find one. Just read what's on the internet regarding this. Also, I don't believe in using the UPS as that put another thing in the chain and can suck the life out of things Hifi if not done correctly. I prefer KISS. Technically it may fit but not sound wise. Oops, I may get into friendly cross fires with the technical experts again. For the V2 loudness, have you try the gain mode? That may help a bit but will degrade the sound if push too wild! Here: www.rock-grotto.co.uk/X-canv2-gain-adjustment.html
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Post by pcourtney1 on Apr 12, 2012 21:07:08 GMT
indeed, I agree with you after reading post #3 on diyaudio site www.diyaudio.com/forums/parts/41967-r-core-vs-toroid.htmlBTW, my UPS is nothing like ordinary cheap computer UPS's normally sold, it is used for the most critical situations, and way way overkill for home or office use The online UPS is ideal for environments where electrical isolation is necessary or for equipment that is very sensitive to power fluctuations. Although once previously reserved for very large installations of 10 kW or more, advances in technology have now permitted it to be available as a common consumer device, supplying 500 watts or less. The initial cost of the online UPS is much higher, but its total cost of ownership is generally lower due to longer battery life. The online UPS may be necessary when the power environment is "noisy", when utility power sags, outages and other anomalies are frequent, when protection of sensitive IT equipment loads are required, or when operation from an extended-run backup generator is necessary. The basic technology of the online UPS is the same as in a standby or line-interactive UPS. However it typically costs much more, due to it having a much greater current AC-to-DC battery-charger/rectifier, and with the rectifier and inverter designed to run continuously with improved cooling systems. It is called a double-conversion UPS due to the rectifier directly driving the inverter, even when powered from normal AC current. In an online UPS, the batteries are always connected to the inverter, so that no power transfer switches are necessary. When power loss occurs, the rectifier simply drops out of the circuit and the batteries keep the power steady and unchanged. When power is restored, the rectifier resumes carrying most of the load and begins charging the batteries, though the charging current may be limited to prevent the high-power rectifier from overheating the batteries and boiling off the electrolyte. The main advantage to the on-line UPS is its ability to provide an electrical firewall between the incoming utility power and sensitive electronic equipment. The model I have is from the APC RT Series, model 1000VA RT (waveform = sinewave) www.apc.com/products/resource/include/techspec_index.cfm?base_sku=SURT1000XLI&total_watts=200maybe it is a bit OTT, but I got some at work for free because we upgraded to the bigger 3000 model
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Post by pcourtney1 on Apr 12, 2012 21:09:18 GMT
super, thanks for that tip, I'm thinking 2 x 70k resistors might be the best values when using my AKG K340 headphones (400ohm) with the X-CAN's
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XTRProf
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Post by XTRProf on Apr 13, 2012 4:50:15 GMT
maybe it is a bit OTT, but I got some at work for free because we upgraded to the bigger 3000 model Yes, that definitely helps and no $$$ damage done. Just compare your hifi with and without it and see which your prefer. In a super highend hirez system, even changing the power cables can be heard. I'm also as baffled as all objectivists as well in those demos at hifi shows and dealers' showrooms. Technically, all purchased UPS will be power rated above what is required. But the sound? Just compare with and without and be happy about it. The prerogative is yours since you have the UPS for free.
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Post by pcourtney1 on Apr 13, 2012 8:45:11 GMT
I think you are missing the point big time ! My UPS takes the AC from the wall, converts it to DC, and then converts it back again to "sine wave" AC, not "square wave" There are other companies in the high end audio component market that also sell Power Plant products (not to be confused with cheap Power Conditioner type products), the most famous in the high end hi-fi industry is PS Audio, and what they call re-generated power, which is the same thing that my RT series UPS is doing www.psaudio.com/products/power/pw-power-plants/p5-power-plant/Like I said I think you miss the point, I don't think you value clean "sine wave" power in a hi- fi system like I do, and many thousands of others buying PS Audio products around the world, if good clean power was not important in the hi-fi chain, then companies like PS Audio would not exist. Maybe you should be the one testing your system with and without a UPS like mine, or something like the "Power Plant" from PS Audio, I already know my system is better sounding for it. A quote from PS Audio Output impedance of a power source is the key indicator of how well connected equipment perform and may be the single most important factor in the way that equipment sounds. The lower the output impedance of the Power Plant, the better the depth, separation of instruments and spatial qualities of the musical soundstage are. It is this critical aspect of the power output that makes all the difference in the world. It is why even the highest-end power conditioners cannot compete with a Power Plant; they raise output impedance as opposed to lowering it. With the PerfectWave Power Plant’s 100 times reduction in output impedance a new level of performance is ushered in; the likes of which have never been heard before. www.psaudio.com/products/power/pw-power-plants/power-on-demand/
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XTRProf
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Pssst ! Got any spare capacitors ?
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Post by XTRProf on Apr 13, 2012 13:13:34 GMT
Maybe you should be the one testing your system with and without a UPS like mine, or something like the "Power Plant" from PS Audio, I already know my system is better sounding for it. Already have with even balanced traffo too at 2KVA. Owner sold it immediately after the demo. The life of the music is gone big time thru a very hirez system. Fyi. So now he's back to basic high current filteration thru carbon, coil and caps. Sounds better this way. If you insist on just being pure technical, I can't offer you here from experience. Frans will be the best person to help you on this and he's saying 320 mp3 is the same as red book CD. I'm out of this thread ............
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