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Junior Varsity
Mackie m1400 amps. Any good? Reliable?
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<blockquote data-quote="John Roberts" data-source="post: 91698" data-attributes="member: 126"><p>Re: Mackie m1400 amps. Any good? Reliable?</p><p></p><p></p><p>Ribbon cables are widely used across several industries, when properly executed they are adequate. </p><p></p><p>Typical for class A/B That is about the upper practical limit for class AB power. The Peavey CS1200 was a back breaker. More power than that you will only see class G/H or class D. </p><p></p><p>That was their way to finesse the front-to-back or back-to-front air flow question... actually I don't think they even knew it was a question. <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":-)" title="Smile :-)" data-smilie="1"data-shortname=":-)" /></p><p></p><p>I am overly critical of this thermal design for the simple reason that they ran full page ads with pretty cut-away drawing bragging about how superior it was to the state of the art. They even came up with a cute name for it (T something)... Sorry guys but the thing they claimed it did better (thermal gradient between power devices) was no better than any other common symmetrical heat sink design because the middle devices received cooler forced air than the end devices that received the same air after it was heated by devices upstream, so the outer end devices ran measurably hotter than the middle devices. This is not a design flaw per se, or any worse than many other similar designs, but most companies don't spend that much money bragging that they improved something that they didn't really. </p><p></p><p>Serious amp designers use techniques like longer heat sink fins for the later hotter positions to equalize the heat transfer, I actually got a patent for another different way to alter the heat transfer from cold to hot end but i won't bore you with thermal design esoterica, my point is the M-1200 was hyped as improved technology when it wasn't, but they had a willing audience of kool-aid drinkers. </p><p></p><p></p><p></p><p>Certainly adequate as long as you don't have to lift them or drop one on your foot... <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":-)" title="Smile :-)" data-smilie="1"data-shortname=":-)" /></p><p></p><p></p><p>JR</p></blockquote><p></p>
[QUOTE="John Roberts, post: 91698, member: 126"] Re: Mackie m1400 amps. Any good? Reliable? Ribbon cables are widely used across several industries, when properly executed they are adequate. Typical for class A/B That is about the upper practical limit for class AB power. The Peavey CS1200 was a back breaker. More power than that you will only see class G/H or class D. That was their way to finesse the front-to-back or back-to-front air flow question... actually I don't think they even knew it was a question. :-) I am overly critical of this thermal design for the simple reason that they ran full page ads with pretty cut-away drawing bragging about how superior it was to the state of the art. They even came up with a cute name for it (T something)... Sorry guys but the thing they claimed it did better (thermal gradient between power devices) was no better than any other common symmetrical heat sink design because the middle devices received cooler forced air than the end devices that received the same air after it was heated by devices upstream, so the outer end devices ran measurably hotter than the middle devices. This is not a design flaw per se, or any worse than many other similar designs, but most companies don't spend that much money bragging that they improved something that they didn't really. Serious amp designers use techniques like longer heat sink fins for the later hotter positions to equalize the heat transfer, I actually got a patent for another different way to alter the heat transfer from cold to hot end but i won't bore you with thermal design esoterica, my point is the M-1200 was hyped as improved technology when it wasn't, but they had a willing audience of kool-aid drinkers. Certainly adequate as long as you don't have to lift them or drop one on your foot... :-) JR [/QUOTE]
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Mackie m1400 amps. Any good? Reliable?
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