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Car Audio Equipment
Amplifiers
Passive vs. Active Cooling
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<blockquote data-quote="keep_hope_alive" data-source="post: 7464196" data-attributes="member: 576029"><p>the MTX fans are screwed in place and sealed, they exhaust air out of the heat sink channel (air blows up in your pic) which ***** air in through the sides. this is more efficient cooling than blowing into a heat sink channel. blowing into a heat sink is much less effective than exhausting air out of the heat sink since the air is evenly distributed across all heat sinks in the channel with exhaust and unevenly distributed when you blow. your xtant amp example is even worse since it exhausts inside the amp case. my 403a and 3300c amps at least had the channel on the outer edge which kept debris off the board - but the fan isn't sealed against the heat sink. it just sits there, held with a single bar. far from ideal. i add a seal and turn the fan around to improve cooling.</p><p></p><p>MTX improved the xtant cooling design. your pics above prove that.</p><p></p><p>many pre-mitek xtant amps are in need of additional cooling. like the 3300c which suffered from power supply components that were not on the heat sink yet commonly overheated and failed. xtant had great ideas but poor quality control and they still cut costs. like 50V caps on a 63V supply rail. granted, the frequency response and THD were much less desirable after the Mitek purchase.</p><p></p><p>MTX makes some decent amps. they have entry level lines that aren't special or desirable. but they do some things quite well, their nicer amps are just fine.</p></blockquote><p></p>
[QUOTE="keep_hope_alive, post: 7464196, member: 576029"] the MTX fans are screwed in place and sealed, they exhaust air out of the heat sink channel (air blows up in your pic) which ***** air in through the sides. this is more efficient cooling than blowing into a heat sink channel. blowing into a heat sink is much less effective than exhausting air out of the heat sink since the air is evenly distributed across all heat sinks in the channel with exhaust and unevenly distributed when you blow. your xtant amp example is even worse since it exhausts inside the amp case. my 403a and 3300c amps at least had the channel on the outer edge which kept debris off the board - but the fan isn't sealed against the heat sink. it just sits there, held with a single bar. far from ideal. i add a seal and turn the fan around to improve cooling. MTX improved the xtant cooling design. your pics above prove that. many pre-mitek xtant amps are in need of additional cooling. like the 3300c which suffered from power supply components that were not on the heat sink yet commonly overheated and failed. xtant had great ideas but poor quality control and they still cut costs. like 50V caps on a 63V supply rail. granted, the frequency response and THD were much less desirable after the Mitek purchase. MTX makes some decent amps. they have entry level lines that aren't special or desirable. but they do some things quite well, their nicer amps are just fine. [/QUOTE]
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Passive vs. Active Cooling
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