Hello folks: Some send speakers to Danny Now will Danny do the same with his gear! Ever do his own Canadian audio show tour. If he did I doubt that he'll be able to keep up with supply and demand. That's sad as cost will be just how many more times the price. 40 points new company to promote 60 points on top. Ride Easy

Yes over the top, never ending looking for perfection, a rabbit hole that achieves nothing. I now after many yrs listen to music and not the gear.

@@cruise2023 rabbit hole for some I guess. A friend is super into high end stuff, cables speakers, ect... but I'd hardly consider him a real audiophile after hearing the noise his system makes with the volume down. More like an extreme hi-fi type setup.

@@v12alpine you have to take care of the big problems before you take care of the small ones.

@@DodgyBrothersEngineering Right? It seems he's done it backwards.

I’m building up crossovers for the X-bravo kit and intend to use the same isolation technique with the components of the crossover. Crossover will be externally mounted. Components will sit along the speaker wires between the amp and the drivers.

For sure ! A very trusted guy !

Which model amp are you referring to? Is it one of their older slash models?

One of the best class-D amps I listened to is tripath ("class-T"). Tube warmth with almost class-D efficiency.

Try the little TPA 3110 ,

Loads of options running Class D amps off battery, I've been doing it for years, plus plenty of Dac boards that run off 12v .

@@JasonWW2000 XDM500/3 With the 2 x 75W running Focal Aria 906 + JL audio 10" w1 in custom sealed box enclosure. Installed in the car I used C6-650 components. I was surprised how good it sounded in the room. Stacking up real well to the Supernait 2. Ok not quite as musical as that but more lively and rythemic and amazing bass for what is not a big amp !

Our batter buffers work a little bit the same way.

Ultracapitors Danny are far better than batteries.

12V supercapacitors are used for current peaks in highend car audio.

Vinnie was a master of off grid approach.

That just moves the source to the solar inverters though. He is running ing pure DC and uses this wizard electronics.gurus circuitry.

​@@RobertCookcxNot necessarily, he could isolate a smaller battery just to run his audio system while the main battery is charging during the day.

@@RobertCookcx Even if he is running off the AC generated by the solar grid. It will be much less polluted than the one coming off the states grid coz of less amount of load in the house.

True, but all of this noise gets filtered out during conversion to DC by any and I literally mean any properly designed modern device, something that has been shown again and again by actual measurements made at Audio Science Review.

@@SteelBlueVision If all the noise got filtered out then BAT power should not sound any better...............

Agree 100%

He was a really sharp guy.

Clearly it did if it took out the camera!

@@Oggycrew I agree. It cannot be very quiet (RF-wise) if it messed up the camera from that far away.

@@danmarjenka6361 These are dead quiet and don't produce any RF noise. I will check this out and see what was freaking out the camera.

Yes, this has me puzzled. Did he mean using the battery while it was being charged? Lithium has special charging cycles that are very different from a lead acid battery. I assumed he meant just a lithium battery by itself. So I don't understand how there could be much difference. He also didn't say what type of lithium. There are many different types, I wonder if they tried all of them?

100% agree. One of my best systems was a Sonic Frontiers tube pre, running a Bryston 4B ST.

Danny can probably shed some light on this.....I have thought about using a portable battery pack like the Bluetti or Jackery units sold on Amazon. I think the issue is that you are stepping up the voltage of the battery pack to 120v, then stepping that 120 down to 12 volts (or even 5 volts) inside the audio component. Too much conversion of voltage probably results in extra noise.

I've experimentee with chip Amps and class a transistor amps and they all sound terrible to me. I can only live on tube Amps. I don't know what in an missing or maybe my ears don't match transistor sounds

There are good conditioners out there. We use a P.I. Audio Uber buss and we use a Dodd Audio balanced power supply.

The MacMini will recognize the DAC input and it will output an I2S signal through the USB output. My Dodd pre is not a variable gain. Mine has a unity gain output.

@@dannyrichie9743 hmmmm... what device will help getting the I2S signal over USB ???

@@tango_gru Amanero makes an interface module.

Yes you need capacitors in the PS. Batteris are aparentli too slow.

Yes, but with tubes we need to find a practical way to get HT quietly.....

@@mfr58 tubes require bigger batteries much much bigger

@@coldfinger459sub0 That's why I said practical....

@@mfr58 you can use some of the low powered battery tubes that came from portable radio sets that were designed to use small batteries from back in the 40s and 50s and before. You make separate preamps that are extremely low power. I can literally run off of one or two regular 18 650 lithium ion batteries.. instead of the large carbon acid batteries or lead acid batteries that weighs several pounds from the 1940s. And you can even make power amplifiers out of battery specialty tubes that were for portable units with today’s battery technology it would be practical, and it is very easy to do .

Unfortunately those devices tend to limit current.

@@dannyrichie9743 How much do you need? A ~$1500 unit can flow something like 25 amps if my math is correct.

@@dylanbond1627 It isn't so much as what they are rated at continuous, but what they do to instantaneous peaks.

It will communicate with the DAC input to send the I2S direct signal through the USB output.

I rip straight from the CD to an AIFF format.

I don't think those batteries are large enough for the task. Plus big AGB batteries are pretty cheap.

I found it after reading other comments. It’s a Mac mini 2014 with snow leopard OS.

Eric from db Audio labs is the expert in that department.

@@dannyrichie9743 DB audio labs website seems to be hosted on an old gen computer... its loading really slow.

The lithium batteries (LiFePo included) have a battery management system onboard. From my understanding, the circuitry is fairly cheap and digitally controls the input and output with the main goal being to protect the cells themselves. Lead acid batteries are a fairly “dumb” electron transfer chemical reaction, so when you apply juice at one end, the electrons move one way, and when you demand power, they flow the other way. If you run a lead acid battery all the way down (within reason), it will typically recharge. Excessive discharge on a lithium battery severely reduces the life span. Some smart cookie could probably design a better BMS circuit that smooths ripple and delivers something similar to lead acid.

Regarding charging and discharging lead-acid and LiFePO4 batteries the opposite od what you stated is actually the case. ​@@byrnemcneill

@@byrnemcneill question, I was under the impression that the BMS is only for charging and equalizing the cells. If the batteries are full and you remove the charger you and up only with cells, nothing more. Or am I wrong?

I have many times.

See you there next month or so.

Its the invertor, you need a dac that runs on dc.

It depends on which model of charger you use. The larger ones can be noisy, and the smaller ones can be dead quiet.

I only use the original CD to burn it to my external hard drive. I never play from the CD.

Yes, but you are completely ignoring the effect of detrimental room temperatures, not to mention exciting the barometric pressure harmonics.

I get better results with it facing magnetic south rather than true south. I think you have to have a real golden ear like mine to tell the difference though because none of my friends or family could tell and they measured identically.

C-Tek chargers.

Thanks!

It has something to do with the output impedance and the electronics built into the battery.

If you can set a battery in your floor somewhere you can be off the grid with any gear designed to run on 12 volts.

@@dannyrichie9743 Thank you Danny. I aspire to that as the wife and finances allow. In the mean time are there any DC filters that are an improvement ? Those iFi DC purifiers , for example ?

I think mine is a 2014 model running Snow Leopard. The older ones allow more to be shut down that is not being used and have the best sound.

I do, or at least I did. Ron (New Record Day) has them right now.

I don't know, but the trickle charge system is very quiet.

It is about the impedance. What little noise ctec makes is sunk in to the battery like in a black hole

@@dannyrichie9743 my system is completely off the grid too, I use regular, lead-acid/ calcium, car batteries up to 75 amphours, I use c-tec charger too but I did notice a degradation of sound when the charger was left on. So I've been just listening and recharging later. That experiment was long ago, though. Perhaps I'll try again, based on your words.

@@zaldam ??? batteries are not capacitors. Slow-ish chemical process vs order of magnitudes faster charge transfers.

I do have schematics for some of his designs.