Gary we are using standalone linear 5A power supplies in lieu of wall wart. A big improvement. Do you think a battery is better and why ?
Now have three in room. Two RR-888 and one RR-777. Adding the 777 was mind bending. Three for me . Besides the sonic benefits both my Wife and I are sleeping better after being in the treated room for hours.
Installed RR-777 in bedroom after realizing the affect from listening room. Just so relaxed. Buy the cheap ones and get several. Just get some.
charles
I have a bit of mixed feelings about that. In general a battery should be better since there is absolutely no conversion in the battery from AC and no chance to get any noise in there. However, I have a Tortuga LDR light dependent resistor preamp which I love, and it runs off of 12 V DC. I hooked it up to my battery/batcap and I thought it would be amazing but it actually had some noise, a bit of hiss. Which really blew my mind, where in the heck is that noise coming from? When I hooked it up to my laboratory quality five amp 12 VDC power supply all of a sudden it was silent. Weird… You might just go buy a cheap 12 V battery (or to 6 V batteries and put them in series) and try it out for yourself to see. It may be that that power supply is better.
I have found the best thing usually is to try one way and try another way and just compare them. Forget about what you think it should be or what somebody else told you it should be. Unless they are telling you not to jump off of the top floor of a skyscraper. You might listen to that one.
“It can’t get weird enough for me” – Dr. Hunter S Thompson
Gary
Battery noise is common. Sulfation and other types of chemical noise are not subtle with a high resolution, high sensitivity system. That is why I came up with the BatteryBUSS years ago. The noise is easily suppressed, but it is a problem unless it is addressed. I like batteries, but they are not a panacea. The output impedance of a battery is relatively high and it needs to be reduced in order to get the impulse/transient response we all crave. Steep rise times are essential.
I’m glad you pointed this out, that batteries can have noise. But $500 for the batteryBUSS is a bit much for me now. I was wondering what to do about that.
After finding the iFi audio Spdif iPurifier and having such good luck with it, I also found that they have a DC iPurifier which they say can cancel out noise on a DC source over a tremendous frequency range and give you very pure DC. It is rated for 84 W, so at 12 V that is about 7 A. What I have hooked up to it is drawing about 2 1/2 A.
https://ifi-audio.com/portfolio-view/accessory-dcipurifier/Very high self praise by the company but after doing some research, and since it is also offered Amazon prime at about $100 and can purify between 5 V and 24 V DC I thought I would just give it a try.
I was amazed that this little thing would make such a positive difference, especially after the good results I had putting in their spdif iPurifier.
I am powering my Tortuga LDR passive preamp, a little Temple Audio Bantam tripath amplifier and a small Schumann resonator that I recently got off of the Internet. The sound suddenly bloomed in a very good way, everything is better balanced and it’s really hard for me to find anything wrong with the sound. A more involving sound to be sure.
My DC source is a 12 V DC BatCap battery, and I also have a 12 V DC linear power supply which I may try after a while.
Bottom line, based on my results I am thinking that if you power anything in your system between 5 V and 24 V DC you might want to try this little honey.
Dave I’m certain the batteryBUSS is better than this little unit, but all the battery hiss from my Tortuga preamp is completely gone now, in addition to all the other good aspects of the sound, and for now that is good enough for me.
Thanks, Gary
And Charles, about the linear power supply, you might try this little DC iPurifier with that and see what happens.