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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Paul, don't get me wrong--normally I'm not choosing a tube by the power, but this situation is somehow special.There are very few tubes which have the right electrical parameters (gm, mu, power, etc) to start with. In thesmall tubes word one can glaz...
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[quote user="steverino"] If the units are to be placed between the wall and the PP then I think that would be a safe way to use it. I do not recommend connecting audio equipment directly through them though.[/quote] That is kind of puzzling to me. Wh...
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The past 6 - 8 months I have been living with very efficient speakers (~ 109dB/m/w) driven by low-power SET amps. The amps use 300B output tubes for about 7 wpc. On paper, this should be a match made in heaven. In fact, the combination is capable of ...
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[quote user="jessie.dazzle"] For now, the amplifiers I use are a pair of Lamm M1.1s (was going to look for a pair of used ML2s, but more and more considering building a pair of Meliquaides). Using the M1.1s with a pair of V.A. Parsifal/Encore (direct...
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The PurePower 2000 claimed efficiency is in fact equal to or greater than 85%. Our 89% rating was published before we added the 2000 model so I will correct it immediately. The energy losses from efficiency are mostly expended in heat - and so cannot...
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On initial installation of my borrowed 1050 i used power cords i have as extras. Did so cause i was still using my BPT for everything but my amps. I had a hum and high pitch buzz from my speakers. Replacing the power cord feeding my amps was the cure...
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The PurePower batteries provide power to the AC regeneration whenever it is required. That could be during a black out, it could be during a brownout, it could be for a fraction of a cycle it could be for 10 minutes. The simple fact is the incoming U...
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Romy, you might want to re-think 2 guys and pneumatic casters under a bare frame dolly for a 950 lb. unit. If you insist on doing it this way, I hope you will make and post a video of the event. I'd at least consider solid, rated casters, espec...
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Sure, there's plenty APS or any hi-fi component "manufacturer"/seller won't say, and one of the most common misunderstandings they quietly exploit is the die-hard audiophile notion of the "universal component", the old "plug-and-play" gambit.If t...
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Jarek, When you say "not 50 Hz hum" it reminds me very much of my troubles I had with my Pure Power 1500 -- (before it "blew up" and needed to be repaired ... ultimately replaced with a new PP 2000 plus by Damien) -- but in any regard, the hum was ca...
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Hi Romy,I am designing the power supply chassis for the DSET at the moment and hope that you can remember some things about how you managed the grounding.All power supply components up to but not including the filter caps for each power supply will b...
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I think I have mentally resolved my question: since all of the equipment powered from my lines will work in a chain,there must be one ground and outlets should be quite compactlyplaced. This minimizes potential differences between the "grounds"and th...
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Power cords is the
most ridicules subject that I have seen in audio and they define all rules,
would it be stupid rules or sensible rules. There is absolutely no difference
in power cords construction, built quality, price, material use, insolatio...
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Do we simply not want a non-changing target? As regeneration does not seem to be „the“ solution (especially if the AC cord behind the regenerator changes bass), what does better AC even mean?Perhaps the designers of great equipment need to rethink po...
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Amir, this is the most popular thread at GSC for a reason. While most people don't give bad electricity a thought, there are obviously plenty of audio people who are looking for answers to these questions. Since my AC provider went "Smart", the AC wh...
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[quote user="Romy the Cat"]Do you personally recognize the sonic impact of bad electricity in your own playback?[/quote]no, not in the sense that i assume you mean it. instead i have my own beef with bad electricity, which i suspect is different fro...
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I think low power ss design is the only way we can make ss to sound good. in my idea all high power ss design i heard had no emotion in their sound in comparison by good SET designs like AN UK Ankoru.the first SS design that make me happy in comparis...
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Hi Romy, KR audio is making high power SET and parallel SET amps using tubes designed by them specifically for low frequency amplification (read as in not radio frequencies). They are getting the power with lower voltages and higher currents th...
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What do you know: the APS PurePower regenerator is back. Since last December, when I returned the PurePower unit #5 because it did not sound right and had some objective defects the APS were working on something and now the PurePower Version 6 ...
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Well, during the last 2 days with new PP300 I used the Bypass button for perhaps 12 times. The init is sitting under the rock and to engage the Bypass I need not only to bend my fat body into indecent position but to hold myself into that positio...
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An Audio Amplifier Design Philosophy
By David Berning ( Courtesy Meta-Gizmo.com )
I became interested in audio at a very young age because I liked music, but was too uncoordinated to be able to p...
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[quote user="joaco"] Romy ; One question for you ; Does the pure power unit raise its temperature (gets hot) when youre using it ? or is it always cold ? I do not know what kind of IC they are using but I suspect they are "new generation ones??" I wa...
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Not saying the "pieces effect" "matters", but is it possible that this stems from using 1-phase power instead of the designed-for 3-phase? After all, the 1-phase is not merely "less power", but it also changes the way the power is delivered. Too ba...
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Yes, Romy, it is certainly an info-mercial first, with all the usual flash/buzz "facts" in play. Also, although all "studios" I know of are "balanced", many of the "hot-rod" studio guys also use all sorts of "power conditioneers". For one thing, it...
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CJ Yes I have assessed AC polarity in my system.Romy says "I took today my large
3kW isolation transformer and place it between my dedicated line and
PP3000. I lost my lower bass, simple as that. "Speaking of isolation transformers, I have not h...
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I was considering for a while making some re-arrangement with electricity lines in my house: to add and remove some lines from my stand by generator, to power pool from different circuit and some more changes. I was kind of considering running a dedi...
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[quote user="Stringreen"] My opionion is that there is no absolute tone - just as there isn't an absolute sound. [/quote]I disagree. I do not know how about the absolute sound – it would be a difficult subject but “Absolute Tone” is not only ease be ...
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[quote user="xandcg"]For power supplies, a possible quick solution would be to get a Komputer, but just the power supply and the box adapted for your board. Their (Lampizator) power supplies are reportedly to be very good. The price can always be neg...
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Not sure now what the problem with battery power was earlier. It might have been a tiny dab of solder on the input adaptor. .. Whatever it was, it's gone now, and I am back to battery power!Basically, the recent mod makes far better sense with batt...
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[quote user="jp"]I was looking into the power supply situation with my DAW and was wondering what viable options exist out there. Currently, I am using an internal 600w pc power and cooling unit. Apparently there arent many out there.&nbs...
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