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Designing a crossover for a DIY speaker project
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<blockquote data-quote="thylantyr" data-source="post: 1245071" data-attributes="member: 560358"><p>So.. you want to be a loudspeaker Jedi ......................... or is it dark lord //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif</p><p></p><p>If your plan is to find the awesome drivers by doing test bench auditions then</p><p></p><p>you can settle for cheaper sources. While a portable CD or MP3 player works,</p><p></p><p>it's kinda noisy for critical listening. Find a used AV receiver on the auction site</p><p></p><p>for dirt cheap, or perhaps a good preamp with volume control. Get the DCX</p><p></p><p>and buy a universal DVD player. I recently snagged a Samsung HD941 universal</p><p></p><p>DVD player for $126 shipped. CD, DVDA, SACD, MP3, and even HD-CD playback</p><p></p><p>so you can sample different formats. I chose this particular brand only because</p><p></p><p>it will output upsampled DVD over component video which is an illegal function,</p><p></p><p>it does it by means of a simple remote control hack {press some keys to enable</p><p></p><p>the feature}. I have an old HD RPTV with no digital inputs so this hack enables me</p><p></p><p>get come better picture quality in 1080i mode. You can get used universal DVD</p><p></p><p>players for cheaper.</p><p></p><p>When buying drivers for audition the good news is --&gt; you only need to buy one.</p><p></p><p>You really don't need to listen to the drivers in stereo unless you want to burn</p><p></p><p>2x more cash. After you collect drivers you have a reference. You can do blind</p><p></p><p>tests with people by hiding the drivers behind grill cloth and making a simple</p><p></p><p>switcher to toggle between two drivers being compared too. This is what I do.</p><p></p><p>If you like high impact, higher SPL sound I have some suggestions as that is</p><p></p><p>what I seek when doing this hobby.</p><p></p><p>If you really want to push the envelope, seek a pro audio amplifier for testing.</p><p></p><p>I suggest a used QSC RMX series. The RMX2450 is the best bang for buck.</p><p></p><p>2400w for $400 used, $600 street, sometimes you see then new for $500.</p><p></p><p>QSC has many RMX lines, RMX850, RMX1450, RMX1850HD, RMX2450, RMX4050HD,</p><p></p><p>RMX5050.</p><p></p><p>What you can do for testing is run the amplifier in bridge mode to really push</p><p></p><p>the drivers hard and to raise clipping headroom as to remove the amplifier</p><p></p><p>from the equation.</p><p></p><p>You can also use Crown XLS, those are Crowns entry level amps that are cheaper</p><p></p><p>than RMX but they don't have some cool features I like that the RMX offers like</p><p></p><p>'easy bridging', 'air tunnel' heatsink, variable speed fan. I don't remember if XLS</p><p></p><p>has subsonic filters, I'm too lazy to look.</p></blockquote><p></p>
[QUOTE="thylantyr, post: 1245071, member: 560358"] So.. you want to be a loudspeaker Jedi ......................... or is it dark lord [IMG]//content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif[/IMG] If your plan is to find the awesome drivers by doing test bench auditions then you can settle for cheaper sources. While a portable CD or MP3 player works, it's kinda noisy for critical listening. Find a used AV receiver on the auction site for dirt cheap, or perhaps a good preamp with volume control. Get the DCX and buy a universal DVD player. I recently snagged a Samsung HD941 universal DVD player for $126 shipped. CD, DVDA, SACD, MP3, and even HD-CD playback so you can sample different formats. I chose this particular brand only because it will output upsampled DVD over component video which is an illegal function, it does it by means of a simple remote control hack {press some keys to enable the feature}. I have an old HD RPTV with no digital inputs so this hack enables me get come better picture quality in 1080i mode. You can get used universal DVD players for cheaper. When buying drivers for audition the good news is --> you only need to buy one. You really don't need to listen to the drivers in stereo unless you want to burn 2x more cash. After you collect drivers you have a reference. You can do blind tests with people by hiding the drivers behind grill cloth and making a simple switcher to toggle between two drivers being compared too. This is what I do. If you like high impact, higher SPL sound I have some suggestions as that is what I seek when doing this hobby. If you really want to push the envelope, seek a pro audio amplifier for testing. I suggest a used QSC RMX series. The RMX2450 is the best bang for buck. 2400w for $400 used, $600 street, sometimes you see then new for $500. QSC has many RMX lines, RMX850, RMX1450, RMX1850HD, RMX2450, RMX4050HD, RMX5050. What you can do for testing is run the amplifier in bridge mode to really push the drivers hard and to raise clipping headroom as to remove the amplifier from the equation. You can also use Crown XLS, those are Crowns entry level amps that are cheaper than RMX but they don't have some cool features I like that the RMX offers like 'easy bridging', 'air tunnel' heatsink, variable speed fan. I don't remember if XLS has subsonic filters, I'm too lazy to look. [/QUOTE]
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