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Ultimate Audio Playback / Chatter and forum related stuff / Re: New toy
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on: December 12, 2016, 05:56:53 am
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Hey Mani, Yup 4C and a lot of open roads Last few weeks, when ever possible have been inspirational trips of some sort related to music or not .... Let's see in the same trip, I passed by Lake Sherwood (right around the pic of Mulholland up there)... home of Pete Sampras, one of my tennis heros Paul Anka https://m.youtube.com/watch?v=4XHe6dSngt0Tom Petty https://m.youtube.com/watch?v=6vWTtx_PxPoBrittney Spears .. ( non inspirational) Sherwood Forest for Robin Hood movies Also told some history with the Ratpack Self indulgent thought process for the intellectual growth.. I've been following Chris Harris, since the closure of TG series, ..... I find him more "real". Not had the chance for the new GT Cheers, VJ
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Ultimate Audio Playback / Chatter and forum related stuff / Re: Single-ended triode amps
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on: December 07, 2016, 03:47:43 pm
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To modify and continue:
"Total system distortion" would be the more appropriate.
Either the "entire system" needs to be under one thought process that takes into account all possible details. Or there needs to be parameters that can be adjusted along the chain, to counteract distortions.
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Ultimate Audio Playback / Chatter and forum related stuff / Re: Single-ended triode amps
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on: December 07, 2016, 05:50:37 am
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Acg: I had a response I was working on, and ran out of time, and lost it all being logged out I don't have any more time But all in all I agree with NP... Best, VJ Edit: Amp/speaker distortions are like Hydra .... you enderstand one and conquer it, few more arise, that didn't didn't exist before .....
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40
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Ultimate Audio Playback / Chatter and forum related stuff / Re: Single-ended triode amps
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on: December 06, 2016, 10:04:15 pm
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It is my understanding that high powered amplifiers could not be "reliably" made back in the day. Therefore an elegant solution, hand in hand with the horns. Amplifier (also the speaker) should have enough power reserve to handle transients ... if the distortion/clipping happens, then its almost always noticed, hence the "sound signature" discussion of the equipment ... Here its mostly the high efficiency crowd, and not much of an issue. but elsewhere its another story. For example my prior Omnis were 84 dB sensitive. I would play it at nominal 78-80 dB. I don't even want to extrapolate the power requirements for lets say 20 dB headroom, with room loading included. It could not handle more than 500W for more than 3sec. Something had to give, with that low-efficiency, heat I suppose ... I will put this across, most tweeters are actually distorting at normal listening levels.
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Ultimate Audio Playback / Chatter and forum related stuff / Re: Single-ended triode amps
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on: December 05, 2016, 09:58:51 pm
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Hi Mani, I'm no expert with electronics. In one of the links there is a program to add your desired listing level, distance, speaker sensitivity etc with head room to estimate power requirements. With a high sensitivity speaker I believe you will not have any issues within the normal listening levels. I've seen over 20dB peaks with Phasure DAC. In which case, 99.9% of audiophiles are 'stuffed' as they use woefully insensitive speakers. Is this correct?
Most likely .... so. Best, VJ
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Ultimate Audio Playback / Chatter and forum related stuff / Re: Single-ended triode amps
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on: December 05, 2016, 03:42:55 pm
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Mani, Also look into this if not already done so! http://www.crownaudio.com/en/tools/calculators"Amplifier Power Required" http://www.crownaudio.com/how-much-amplifier-power"Peak headroom Because music has transient peaks that are 6 to 25 dB above the average level, the power amplifier needs to produce enough power to handle those peaks without distortion. For example, if you need 100 watts continuous power to achieve the desired average SPL, you need 1,000 watts continuous to handle 10 dB peaks, 3,162 watts to handle 15 dB peaks, and 10,000 watts to handle 20 dB peaks. Clearly, the peaks require far more power than the average levels. In the calculator's Peak Headroom field, enter 6 dB for rock music that is compressed or limited, or enter 20 to 25 dB for uncompressed live music. If you can live with some short-term clipping which may be inaudible, enter 10 to 15 dB.
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Ultimate Audio Playback / Orelino / Orelo MKII Loudspeakers / Re: Toeing
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on: December 05, 2016, 02:52:38 pm
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Mani,
Of course the Lambo is a different beast with a price-tag 8X the Alfa, 3Xs cylinders (naturally aspirated), and with more than 2X the power, 7 different suspension settings. In the windy mountains roads, Alfa was in par, or might I dare say an edge with its smaller wheelbase. In the straightaways it's no match. The Lambo guy is an avid racer, was in fact suprised by the lil Alfas performance.
Cheers, VJ
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Ultimate Audio Playback / Chatter and forum related stuff / Re: Single-ended triode amps
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on: December 05, 2016, 02:33:33 am
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My understanding about amplifiers
1. Current vs voltage school of thought - effects the speakers differently.
2. Power - a dark kept secret. Power rating are for a single signal. And power response drops with a complex signal. Power reserve can be "relatively" addressed for amplifiers with less than 60W, without affecting the outgoing signal. Add a power robbing crossover and more variables in the mixture.
Relax response: a very primitive description .... when the necessary parameters are met by the human auditory complex, brain will relax. Most will go to sleep ....
Because most are sleep deprived .... and once the brain feels safe, it will proceed to the next important thing on the list!
Best, VJ
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