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<blockquote data-quote="Richard Stringer" data-source="post: 43097" data-attributes="member: 166">Re: Question about headroom with dj mixersIt&#039;s ok John. <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&nbsp; &nbsp; :)"&nbsp; data-smilie="1"data-shortname=":)" />I prefer older heavyweigh transformer amplifiers because at the budget end of live sound they&#039;re better for subs than the lightweight switch mode amps. I&#039;m talking about amps in the price range of say, the QSC RMX2450, amps that price, or around that price, used older heavyweight amps bought for the same price in my opinion give better low frequency output. I&#039;ve tried various amps and found that switch mode amps on subs weren&#039;t very impressive. There&#039;d be no point in using higher power amps than the MPA750 bridged anyway because of the fact i&#039;d lose a lot of the increase in power due to power compression. So basically, instead of using two bridged MPA750 amps, one per subs, if I used an amp or amps that could output 3,000 watts into 4 ohms (the impedance of my subs) i&#039;d maybe only get about 1db of extra spl because of power compression. I don&#039;t clip my system ever anyway, so for the sake of about 1db more spl, I might as well just stick with amps or an amp that can give my subs at least 1,600 watts average power each.</blockquote>

[QUOTE="Richard Stringer, post: 43097, member: 166"] Re: Question about headroom with dj mixers It's ok John. :) I prefer older heavyweigh transformer amplifiers because at the budget end of live sound they're better for subs than the lightweight switch mode amps. I'm talking about amps in the price range of say, the QSC RMX2450, amps that price, or around that price, used older heavyweight amps bought for the same price in my opinion give better low frequency output. I've tried various amps and found that switch mode amps on subs weren't very impressive. There'd be no point in using higher power amps than the MPA750 bridged anyway because of the fact i'd lose a lot of the increase in power due to power compression. So basically, instead of using two bridged MPA750 amps, one per subs, if I used an amp or amps that could output 3,000 watts into 4 ohms (the impedance of my subs) i'd maybe only get about 1db of extra spl because of power compression. I don't clip my system ever anyway, so for the sake of about 1db more spl, I might as well just stick with amps or an amp that can give my subs at least 1,600 watts average power each. [/QUOTE]

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