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Ripple is always voltage,iFi 9V with 1A only has 0.15uV (ripple). And is cheap.The cheap SMPS from Asia are very noisy and add noise to mains. Its proliferation is one of the causes of the electrical network having so much noise at present.
5V/2.5A; 9V/2.0A; 12V/1.8A; 15V/1.2ANoise*: 1uV* Average audio band noise floor
Exactly. Thus I quoted his values and asked for clarification (I already knew they were incorrect). And that introduces the question as to whether any of the data in that chart is correct.
A boutique power supply will give you totally awesome bragging rights.But if all you need is pure clean linear regulated power then pick up a used Acopian B15G200 on eBay for $55 - $65.The A15MT300 will give you a little more headroom and has tighter specs for a little more. You can also order new for a lot less than $500.Acopian power supplies are made for 24/7 industrial use and will outlast any electronics you plug them into. You will need to make your own connector and power cord but that is super easy.Acopian has other models to choose fromhttps://www.acopian.com/power-supply-voltages/15-volt-power-supplies.htm?search=15
Features and Benefits• Ripple noise: less than 5 mV P-P• Conduction noise: lower than Class-B of CISPR by 20 DdB• Radiation noise: Complies with Class-B of CISPR• Leakage current: 50 μA or less for medical use• Safety mark for medical use: EN60601-1 3rd edition• Safety standards: UL1950, CSA950, EN60950, and CE marking• World-wide input range• Parallel operation
I know the amp rating is ok but is the 15 volt, which is 3 volt more than I need, going to be ok ?
SummaryThe combination of Sonore microRendu and ifi iPower is not good news. Performance is significantly degraded by injection of AC mains input of 60 Hz and its harmonics.If you are going to use microRendu, then you should opt for a power supply like the SBOOSTER that has measured system performance that demonstrates its performance in this system. Once there, this device is useful from functionality point of view in allowing the DAC to sit remotely on a network. From audio performance point of view, the measurements do not show any improvements.
Product highlights: Power saving design. 2 characteristics in 1 product. Power for high current demanding equipment. Precision for noise sensitive equipment. Two switch selectable output voltages; 15 volt and 16 volt. Accessory setting which provides extra voltage for the optional Sbooster Ultra. IEC 14 power inlet connector for high-end mains cables. High performance dual stage mains filter. Earth line choke. Over voltage protection. <- black varistor Custom made high efficient audio grade transformer. High quality polypropylene film capacitors. Improved low noise SBooster split current system.The BOTW P&P ECO is available in 11 different output voltages.
Hi Hugh,Yes, the Alpha 20 is now my main amp. 20 Watts would have been seen as wanting for more on some amps, but for some reason, it seems to be perfectly good here. Well I will have to do a revaluation once I get the 52w Big Boy going, big for now, I am able to put the other amps on the shelf and leave this one as primary. I think the combination of superior spatial imaging, clarity, resolution, and bass authority makes this amp a keeper. Seems to work quite well with conventional 400VA 18v toroidal trafo and CRC 33mF 0.235R 33mF shared with two channels then another 0.235R 33mF RC for each channel independently (F6 stereo PSU).My SMPS seems to not be able to keep up without being stressed at the currents we are talking about here. I was running the DC step up at 29v to make 24v after the cap Mx and so that was 29/24x1.3ampsx2/0.9=3.4amps. Seems within 5amp rating but the smps supply seems to have more noise when pushed this hard. I might try again later with a good common mode choke filter. For now, just use the trafo and linear supply.
Feature:1) Linear Technology 0.8uV ultralow noise LT3042 regulator2) +-9V/12V/15V 1.5A* output switchable with a jumper easily. Please notes 1.5A is the burst value, please read the bottom notes for output usage larger than 0.5A continuously.3) Panasonic EEUFC low ESR 5600uF capacitor and the red WIMA film capacitor are sourced from authorized distributor Arrow Electronics directly (guarantee no fake product from China)4) The PCB follows the official demo circuit for ultimate performance.5) Compact size 60mm x 90mm
Overall measurements:0-100kHz ripple: ~ 5µV rms0-100kHz noise: -106dBV0-20kHz ripple: 2,2µV0-20kHz noise: -112dBV50Hz ripple not measurable!
