Edgar Posted December 30, 2021 Share Posted December 30, 2021 https://audiophilestyle.com/ca/bits-and-bytes/the-audio-impact-of -solar-panels-and-battery-backup-comparing-sound-quality-of-panels-batteries-and-the-grid-r1072/ The next step is to eliminate AC altogether, and power all components directly from batteries. They all convert AC to DC internally anyway. 1 Quote Link to comment Share on other sites More sharing options...
Invidiosulus Posted December 30, 2021 Share Posted December 30, 2021 The end game is to only listen to baroque chamber music in a live setting. 1 5 Quote Link to comment Share on other sites More sharing options...
richieb Posted December 30, 2021 Share Posted December 30, 2021 Battery powered components do produce Zero background noise, the bane of hi-end audio. I mean, think how quiet your flashlight is - 🤔 1 1 Quote Link to comment Share on other sites More sharing options...
The Dude Posted December 30, 2021 Share Posted December 30, 2021 I have always been curious about this concept and how it would affect a system. Not saying its a driver to go out and install this type of off grid system for audio, but I am surprised that people haven't' done so.. especially if some in Japan are installing their own power pole. Quote Link to comment Share on other sites More sharing options...
Invidiosulus Posted December 30, 2021 Share Posted December 30, 2021 This is why headphone guys have battery powered headphone amps and DACs. Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted December 30, 2021 Share Posted December 30, 2021 3 hours ago, Invidiosulus said: This is why headphone guys have battery powered headphone amps and DACs. Since my "all horn system" has 106-112 db Sensitivity, I'm about to use a Headphone Amp to drive the R&L, 3-way, passive networked, channels with the same technology that is used in the Benchmark AHB2 Amplifier (THX AAA 888 technology). I am a huge proponent of rating Power Amplifiers in dbWatts, so I'm only giving up 10 dbWatts in going from 100 Watts per channel down to about 10 watts per channel in the process. So getting 80 db of output at my sweet spot only requires about 50 Milliwatts per channel, which gives me 26 db of headroom and up to 116 db PEAK output before clipping, with additional 3-4 output from the Full Horn Subwoofer (about the size of a Refrigerator) That has it's own 20 dbWatt Amplifier (it is a 105 db sensitive horn with 6 db boost at it's low cutoff, with 100 Watt Plate Amp, which is affordable, distortion wise). So, basically the "system" can reach 120 db peaks with not trouble at all, since the bass blow 80 Hz., down to 25 hz. is still provided by a full HORN! MUSIC content gets down that low, only rarely, so if I think I need to get down below 25 Hz. for greater impact of the, say, Digital Canons in the TELARC 1812 Overture (the Sub Killer on CD since 1983!), I simply bring it upstairs to play on my HT system that can get down in the teens with 30 dbWatt output and 100 db Sensitivity with Zero compromise in sound quality. Since the 10 dbW Headphone Amp uses a 10 volt power supply, I can easily use my spare Car Battery to power it and will be the subject of a future A/B test. Oh, and the Headphone amp is $189.00 on Amazon, which means the entire system cost, including all the horns is roughly the cost of the Benchmark AHB2 amp only. So spending money on wood horns, you can use small amplifiers that cost 10-40 Times LESS and have a reduction of DISTORTION in the process of also using lower voltage DC supplies! HORNS RULE! 1 Quote Link to comment Share on other sites More sharing options...
Curious_George Posted December 30, 2021 Share Posted December 30, 2021 3 hours ago, richieb said: Battery powered components do produce Zero background noise, the bane of hi-end audio. I mean, think how quiet your flashlight is - 🤔 Not quite, maybe at absolute zero. Battery Noise.pdf Quote Link to comment Share on other sites More sharing options...
OO1 Posted December 30, 2021 Share Posted December 30, 2021 interesting data Quote Link to comment Share on other sites More sharing options...
captainbeefheart Posted December 30, 2021 Share Posted December 30, 2021 Even from a perfect "Battery" DC supply you are still at the mercy of noise from currents through active components to even simple resistors. Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted December 30, 2021 Share Posted December 30, 2021 2 hours ago, Curious_George said: Not quite, maybe at absolute zero. Battery Noise.pdf 343.58 kB · 1 download I read that paper, which is from obsolete battery technology of 30 years ago. We need something that tests the noise in NiMH and Lithium Ion batteries to be more up to date on this. Also, Car batteries should be explored, since they are so common as well and can EASILY power Amplifiers that are perfect for driving Big Horns in Homes!! Quote Link to comment Share on other sites More sharing options...
Curious_George Posted December 30, 2021 Share Posted December 30, 2021 13 minutes ago, ClaudeJ1 said: I read that paper, which is from obsolete battery technology of 30 years ago. We need something that tests the noise in NiMH and Lithium Ion batteries to be more up to date on this. Also, Car batteries should be explored, since they are so common as well and can EASILY power Amplifiers that are perfect for driving Big Horns in Homes!! My point was that all sources of power will have an impact on noise and ultimately the audio quality of electronic circuits. 1 Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted December 30, 2021 Share Posted December 30, 2021 27 minutes ago, Curious_George said: My point was that all sources of power will have an impact on noise and ultimately the audio quality of electronic circuits. Got it. I'm also pretty sure that ALL batteries have less noise than most AC/DC conversion methods that serve as amplifier power supplies. Since an my all horn and mostly horns with DR's in the mix, all have 100+ db/Watt efficiency and proportionally lower distortion, they are most sensitive to noise. With the advent of Cheap, Low Power, Solid State Amplifiers that have 40 db less noise than the best of Tube Amplifiers, why should we really care about this except for an academic exercise or casual knowledge that is rarely needed? Thanks for the article either way. Quote Link to comment Share on other sites More sharing options...
Edgar Posted December 30, 2021 Author Share Posted December 30, 2021 I did a quick look-up, and rechargeable batteries appear to have internal resistance somewhat higher than electrolytic capacitors. I am not aware [*] of any reason that capacitors could not be used with a battery power supply in exactly the same way that they are presently used with a rectified AC power supply. In the battery case they would not be used to filter ripple, but rather as short-term low-impedance current sources. [*] Doesn't mean that one doesn't exist. Only means that I'm not aware of it, if it does. Quote Link to comment Share on other sites More sharing options...
Shiva Posted December 30, 2021 Share Posted December 30, 2021 Vini Rossi is one amp designer i've read about, whose earlier amps had an internal battery that charged off the wall and then powered the speakers using the battery only. 1 Quote Link to comment Share on other sites More sharing options...
Edgar Posted December 30, 2021 Author Share Posted December 30, 2021 14 minutes ago, Shiva said: Vini Rossi is one amp designer i've read about, whose earlier amps had an internal battery that charged off the wall and then powered the speakers using the battery only. There was a whole line of amplifiers that operated in that fashion. I think that it was back in the 1970s or 1980s. I cannot remember the brand name. They looked pretty good, but didn't survive. 1 Quote Link to comment Share on other sites More sharing options...
jason str Posted December 31, 2021 Share Posted December 31, 2021 43 minutes ago, Edgar said: There was a whole line of amplifiers that operated in that fashion. I think that it was back in the 1970s or 1980s. I cannot remember the brand name. They looked pretty good, but didn't survive. I have one, it's modified. Nirvana Electronic Works. Too dark for a picture right now. 1 Quote Link to comment Share on other sites More sharing options...
Edgar Posted December 31, 2021 Author Share Posted December 31, 2021 12 minutes ago, jason str said: I have one, it's modified. Nirvana Electronic Works. Too dark for a picture right now. Yes! "N.E.W." I thought that I remembered that it started with an "N". 1 Quote Link to comment Share on other sites More sharing options...
wuzzzer Posted December 31, 2021 Share Posted December 31, 2021 I had a battery powered Sonic Impact T-amp with a pair of forte IIs for a while and it sounded fantastic. Quote Link to comment Share on other sites More sharing options...
jason str Posted December 31, 2021 Share Posted December 31, 2021 @Edgar Light not great but. Hooked up right now. 1 Quote Link to comment Share on other sites More sharing options...
Bubo Posted December 31, 2021 Share Posted December 31, 2021 On 12/30/2021 at 7:11 AM, Edgar said: https://audiophilestyle.com/ca/bits-and-bytes/the-audio-impact-of -solar-panels-and-battery-backup-comparing-sound-quality-of-panels-batteries-and-the-grid-r1072/ The next step is to eliminate AC altogether, and power all components directly from batteries. They all convert AC to DC internally anyway. In the original tube gear, they refer to battery might be an interesting retro build Quote Link to comment Share on other sites More sharing options...
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