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I know DEAD HORSE.. but if you feel like it,.. Help me with Class A/B vs Class D.
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<blockquote data-quote="Chromatic" data-source="post: 8221734" data-attributes="member: 659121"><p>PC Fans (or Computer anything I am the expert on.. unlike being the noob here //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif ) -- I'm running fans I have on hand that are not being utilized,.. I have a great 140mm Noctua NF-F12 that runs at 28dBa.. and I can suppress it further with an ULNA if need be,.. but won't be needed. It also runs on a mere 0.05amps @ 6watts,.. If you were to categorize "PC fans" like you do speakers -- Noctua would be like Focal Utopia's //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif -- Ugly as sin , but of course made in Germany ,.. and run forever with SSO2 Metal Bearing Shells...</p><p></p><p>As for your amp temp vs. mine -- Well,.. I'm not so sure they can be compared as equals.. a one channel amp compared to a 5 channel amp is going to have different properties thermally. But, I think moreover it's location/location/location -- Where this amp is is just hot. It's Padded completely (so all the metal that was exposed is no more that would have helped a bit with heat dispersion) -- Further it's fully carpeted,.. and to top it off is closed and has a seal.. While it's not WATER tight.. it's much hotter than putting it under a seat even with the carpet all up on the amp. The "glovebox" as it's called this amp is in is really the anti-thesis of an ideal Amp location thermally -- It is a bit of an oven I suppose. Airflow is the biggest issue here as there is absolutely zero. I believe the fan will do wonders in this spot. The designer in me wants to Fabricate the door a bit and have it pulling in air from the cabin directly onto the amp.. But, I'm just going to start with it off to the side blowing horizontally across the amp just to keep some airflow going.</p><p></p><p>The amp isn't defective,.. my setup is good,.. and my gains are set actually a touch below the v=sqrt(rmsWxohms). The gains on this amp are set at 50% for the front, 50% for the rears, and 60% for the sub. So it's not jacked up on the gains,.. I was actually a bit surprised I had this much headroom given I'm pressing all the amps rated RMS power (well besides the 1-2v I dropped the gains as a safety net).</p><p></p><p>Really the only time it got HOT was when I was sitting in the car, with it off,.. in the garage,.. watching a Movie (dvd) for nearly 3 hours straight. On a 10-15minute trip last night to the post office.. I felt of the amp when I stopped and it was literally cold! So it really varies. For whatever reason the Video/DVD/Movie heated it up the most -- and I think much of that was merely due to the sheer amount of time and the CONSTANT current a movie has... A movie isn't even as dynamic as music -- which has varying levels of power as the song goes through it's own peaks and valleys.. then your pauses between songs.. different song types etc.</p><p></p><p>I do remember the A/B amps I had a decade ago... They were only pushing 100watts a piece RMS each on a single JL W1 12" (insane SPL).. but they got frying pan hot.. You'd get literal burns on your hand(s) if you held it there for more than a quick touch after being on for 20+ mins. I ran them 4-5 years, then sold them when I traded vehicles.</p><p></p><p></p><p>@bbeljefe has been great! He is a wealth of knowledge and has a great disposition. As for me not knowing how to wire a relay, etc.. well.. thing with me, is I learn it, and learn it thoroughly and do it myself! Now in order to do so it does take gathering the information,.. which it really helps to have people like jefe who will at least point you in the right direction.. like with the links to more in depth explanation of the actual functions of the relays, etc. (While most people would just say,.. yah yah.. so I put those wires there.. ok .. ) -- And they never bother to go read up on what the relay, etc is actually doing. -- Actually the "Majority" of people wouldn't even be bothering to check how hot this amp was .. they'd have it shutup in that slot I do and wouldn't look at it unless something died/broke! That's the majority (Which isn't represented by the people on this forum. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif ).</p><p></p><p>I also enjoy this type of stuff.. learning,.. working with my hands -- This isn't a chore figuring out solutions to "Safeguard" to potential issues that could crop up.. I enjoy this type of work/small project.</p><p></p><p>Appreciate all your replies.</p></blockquote><p></p>
[QUOTE="Chromatic, post: 8221734, member: 659121"] PC Fans (or Computer anything I am the expert on.. unlike being the noob here [IMG]//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif[/IMG] ) -- I'm running fans I have on hand that are not being utilized,.. I have a great 140mm Noctua NF-F12 that runs at 28dBa.. and I can suppress it further with an ULNA if need be,.. but won't be needed. It also runs on a mere 0.05amps @ 6watts,.. If you were to categorize "PC fans" like you do speakers -- Noctua would be like Focal Utopia's [IMG]//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif[/IMG] -- Ugly as sin , but of course made in Germany ,.. and run forever with SSO2 Metal Bearing Shells... As for your amp temp vs. mine -- Well,.. I'm not so sure they can be compared as equals.. a one channel amp compared to a 5 channel amp is going to have different properties thermally. But, I think moreover it's location/location/location -- Where this amp is is just hot. It's Padded completely (so all the metal that was exposed is no more that would have helped a bit with heat dispersion) -- Further it's fully carpeted,.. and to top it off is closed and has a seal.. While it's not WATER tight.. it's much hotter than putting it under a seat even with the carpet all up on the amp. The "glovebox" as it's called this amp is in is really the anti-thesis of an ideal Amp location thermally -- It is a bit of an oven I suppose. Airflow is the biggest issue here as there is absolutely zero. I believe the fan will do wonders in this spot. The designer in me wants to Fabricate the door a bit and have it pulling in air from the cabin directly onto the amp.. But, I'm just going to start with it off to the side blowing horizontally across the amp just to keep some airflow going. The amp isn't defective,.. my setup is good,.. and my gains are set actually a touch below the v=sqrt(rmsWxohms). The gains on this amp are set at 50% for the front, 50% for the rears, and 60% for the sub. So it's not jacked up on the gains,.. I was actually a bit surprised I had this much headroom given I'm pressing all the amps rated RMS power (well besides the 1-2v I dropped the gains as a safety net). Really the only time it got HOT was when I was sitting in the car, with it off,.. in the garage,.. watching a Movie (dvd) for nearly 3 hours straight. On a 10-15minute trip last night to the post office.. I felt of the amp when I stopped and it was literally cold! So it really varies. For whatever reason the Video/DVD/Movie heated it up the most -- and I think much of that was merely due to the sheer amount of time and the CONSTANT current a movie has... A movie isn't even as dynamic as music -- which has varying levels of power as the song goes through it's own peaks and valleys.. then your pauses between songs.. different song types etc. I do remember the A/B amps I had a decade ago... They were only pushing 100watts a piece RMS each on a single JL W1 12" (insane SPL).. but they got frying pan hot.. You'd get literal burns on your hand(s) if you held it there for more than a quick touch after being on for 20+ mins. I ran them 4-5 years, then sold them when I traded vehicles. @bbeljefe has been great! He is a wealth of knowledge and has a great disposition. As for me not knowing how to wire a relay, etc.. well.. thing with me, is I learn it, and learn it thoroughly and do it myself! Now in order to do so it does take gathering the information,.. which it really helps to have people like jefe who will at least point you in the right direction.. like with the links to more in depth explanation of the actual functions of the relays, etc. (While most people would just say,.. yah yah.. so I put those wires there.. ok .. ) -- And they never bother to go read up on what the relay, etc is actually doing. -- Actually the "Majority" of people wouldn't even be bothering to check how hot this amp was .. they'd have it shutup in that slot I do and wouldn't look at it unless something died/broke! That's the majority (Which isn't represented by the people on this forum. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] ). I also enjoy this type of stuff.. learning,.. working with my hands -- This isn't a chore figuring out solutions to "Safeguard" to potential issues that could crop up.. I enjoy this type of work/small project. Appreciate all your replies. [/QUOTE]
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I know DEAD HORSE.. but if you feel like it,.. Help me with Class A/B vs Class D.
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