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Post by Deleted on Oct 1, 2018 21:00:30 GMT
I think it was these I heard in the Longdog room at a show last year. They were being used with some BBC style speakers by Graham Audio which were definitely not my cuppa so difficult for me to assess ... I saw a show report that confirms your thought on that equipment combo. I’ve not heard that style of speaker either but I don’t think they’d do anything for me either. It’s a toughie, buying blind (or should that be deaf?) but I just have a feeling they’ll be just what I’m after - more refines, still powerful enough for my needs but with extra delicacy and a heavy dose of class A bias. |
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Post by julesd68 on Oct 2, 2018 16:47:25 GMT
Sounds like you've done your research, wish you all the best with them.
Also it's great to be supporting 'boutique' British makers like LDA.
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Post by julesd68 on Oct 2, 2018 16:48:11 GMT
Incidentally, what speakers will you use with them?
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Post by MartinT on Oct 2, 2018 17:29:34 GMT
I am certain that the Longdogs will be more transparent than the Magtech. Enjoy!
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Post by Deleted on Oct 2, 2018 21:12:33 GMT
Incidentally, what speakers will you use with them? Incidentally, what speakers will you use with them? Currently I have a pair of Usher S520s in there. They’re somewhat outclassed by all of my other components but are excellent at their price point I must say. I’m toying with the idea of a big pair of Quadrals or maybe even Kerr Acoustics K100 as my next step. Certainly more in line for a pair of amps like these  Thankd Martin. Once they’ve turned up I’ll start my system blog thread. |
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Post by julesd68 on Oct 3, 2018 8:31:49 GMT
Yes I'm sure those amps deserve some substantial speakers.
That's shaping up to be a great system, look forward to seeing how it all comes together.
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Post by Deleted on Mar 19, 2019 1:16:27 GMT
Hey guys, questions for you.
1. If an amp is capable of delivering 50A of instantaneous current, why doesn't it blow the fuse? My guess is that because it's only instantaneous and therefore doesn't trigger the fuse to blow?
2. Building on above, if a mains conditioner is rated for 18400 watts (transient), this means it should be able to deliver up 76 amps of current on peaks. The P6 amps are meant to be able to easily deliver 50A instantaneous current. Therefore, am I right to presume it won't cut the dynamics of the music I play?
3. Assuming all things are working within tolerance, are the (standard) plugs in our houses actually able to deliver the claimed current for the amps?
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Post by MartinT on Mar 19, 2019 7:05:17 GMT
1. The instantaneous current will almost all come from the reservoir capacitors. Also, most power amps use a linear PSU and therefore have a transformer. The power rails run at a lower DC voltage, so current demand from the mains is going to be lower than current demand from the power rails. Switched mode power supplies are different but there is still a transformer in there working at a higher frequency than mains. When I switch my power amp off it continues to play music for about 12s, giving you an idea of how much reserve power it holds.
2. My regenerator is capable of 1500W continuous and a lot more instantaneously. It also stores power for peak demands. You should find that a regenerator will enhance rather than curtail dynamics unless you're running very serious class A amps. If I'm giving my system a real workout the power draw from the P10 rarely goes above 300W (or just over 1A from my 240V mains).
3. Yes. Again using my example, even at the maximum draw of 1500W (there are losses despite the P10's efficiency so it'll be somewhat more), a standard socket is capable of powering a 3kW kettle. The reality is that your system will draw much less than that. What is more important for mains power is low impedance, best fixed by having a dedicated supply, and low noise.
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Post by Deleted on Mar 19, 2019 8:41:18 GMT
Thanks for the detailed and informative reply Martin; it makes perfect sense.
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Post by julesd68 on Sept 29, 2019 17:37:33 GMT
Another question about current! If you have two power amps of exactly the same basic design, but one has much higher power output with considerably more instantaneous current, I am wondering what benefits one might get beyond just sheer power. Do you get more bass grip, better control of big dynamic swings etc ? Any other possibilities?  |
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Post by MartinT on Sept 29, 2019 18:17:26 GMT
Do you get more bass grip, better control of big dynamic swings etc ? Any other possibilities? Pretty much. Slam, transient accuracy, deep and tight bass. A sense of authority to the whole soundstage. |
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Post by julesd68 on Sept 29, 2019 19:40:58 GMT
Do you get more bass grip, better control of big dynamic swings etc ? Any other possibilities? Pretty much. Slam, transient accuracy, deep and tight bass. A sense of authority to the whole soundstage. Hmm - all of that sounds good! |
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