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mission:tech:odyssey:audio [2014-10-29 13:33] – chronomission:tech:odyssey:audio [2015-04-12 17:07] (current) – [High-End Audio vs. Low-Power budget] chrono
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 ====== High-End Audio vs. Low-Power budget ====== ====== High-End Audio vs. Low-Power budget ======
  
-Considering all the voodoo and insane prices so called "High-End" audio systems introduced to the simple art of listening to sounds/music with the best possible signal reproduction result, it was quite a surprise to find solutions, that would only cost a fraction of "High-End" system, have a virtually linear power-consumption to usage ratio and sound equally well, maybe even subjectively better.+<WRAP round alert> 
 +There seem to be a couple of ebay auctions, selling TA2020 amps and the sellers seem to have put https://apollo.open-resource.org/mission:tech:odyssey:audio into the description. Those auctions are in no way affiliated with Apollo-NG. Please be aware of that, someone just put the URL to our wiki in there, it has nothing to do with this project. 
 +</WRAP> 
 + 
 +Considering all the voodoo and insane prices so called "High-End" audio systems introduced to the simple art of listening to sounds/music with the best possible signal reproduction result, it was quite a surprise to find solutions, that would only cost a fraction of "High-End" systems, have a virtually linear power-consumption to usage ratio and sound equally well, maybe subjectively actually  even better. Over the course of 3 years a lot of Audio-Enthusiasts have been sitting here and were always mesmerized by the clarity, dynamic and stage perception, these two setups produce.
  
 Traditional Class A,B,A/B amplifiers simply are no option, since they burn too much power by design and need more than 12V, to produce the necessary amount of power to properly control the drivers.  Traditional Class A,B,A/B amplifiers simply are no option, since they burn too much power by design and need more than 12V, to produce the necessary amount of power to properly control the drivers. 
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 The best performance can be achieved by using these devices in a low-power/mobile environment, running for hours of a small 13.8V lead battery or even a 4S LiPo Pack. The best performance can be achieved by using these devices in a low-power/mobile environment, running for hours of a small 13.8V lead battery or even a 4S LiPo Pack.
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 ===== Test Setup 1 ===== ===== Test Setup 1 =====
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 === Modifications === === Modifications ===
  
-== Input Filters ==+** Input Filters **
  
 Low-Pass chebychev on dc power input + ferrite choke to reduce EMI may help in noisy env's like this setup had to suffer from.  Low-Pass chebychev on dc power input + ferrite choke to reduce EMI may help in noisy env's like this setup had to suffer from. 
  
-== Mundorf Caps ==+** Mundorf Caps **
  
 The original red caps were replaced by very expensive Mundorf silver/oil caps, the price of each cap greatly surpasses the price of the whole amp. Unfortunately, this seems like a complete waste of resources, since no audible increase in sound performance could be perceived, so you can just comfortably stick to the original red ones, without the need to test/optimize there. The original red caps were replaced by very expensive Mundorf silver/oil caps, the price of each cap greatly surpasses the price of the whole amp. Unfortunately, this seems like a complete waste of resources, since no audible increase in sound performance could be perceived, so you can just comfortably stick to the original red ones, without the need to test/optimize there.
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 ==== Acoustic Research Helios B15 Executive ==== ==== Acoustic Research Helios B15 Executive ====
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   * When looking for suitable speakers/drivers it was very hard to find the sound pressure spec for single drivers instead of a boxed speaker. Why is that? Has the box itself so much influence on the efficiency of the speaker?     * When looking for suitable speakers/drivers it was very hard to find the sound pressure spec for single drivers instead of a boxed speaker. Why is that? Has the box itself so much influence on the efficiency of the speaker?  
 +
 +{{tag>audio hifi high-end tripath amplifier helder ta2020 ta2024 class-d}}
 +
 +{{keywords>Apollo-NG hackerspace hacker space development makerspace fablab lab community open-resource open resource mobile hackbus hackbase audio hifi high-end tripath amplifier helder ta2020 ta2024 class-d}}
 +
 +~~DISCUSSION~~
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