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Audio and Video Talk
General Discussion
Misconceptions in the SA general public regarding Home Cinema
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<blockquote data-quote="defiantiger" data-source="post: 1106" data-attributes="member: 37"><p>Whew... technical overload for my brain, but let's see what's got in. </p><p></p><p>Okay, stop me if I'm wrong at any point:</p><p></p><p>Two main designs of subwoofer: Ported and Sealed.</p><p></p><p>Ported seems to me to be more common, and offers greater real-world output in terms of power versus a sealed design, where the driver has to 'struggle' against itself in the box. However, a port can intruduce harmonic resonances (80 and 160hz resonances from a 40hz sine). So, uber-simplified tradeoff is power vs resonance, though all of this is dependant on many design variables, that cancels out any hard-and-fast rule in subwoofer design.</p><p></p><p>Got to love how non-technical people can oversimplify, right?</p><p></p><p>Just a point - surely another misconception is that you can place the sub anywhere in a room (can quote out of amp manuals <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /> ) but it's placement can change the sound completely. Hence, sales people push much bigger subs than needed, when the correct placement of a smaller sub can deliver the desired sound. </p><p></p><p>And what is the ideal entry-level size of a sub? Not that I've searched (its out there somewhere), but physics is going to prevent an 8" sub from creating certain frequencies accurately, right? But what is the enhancement from going to 8" to 10" and where is the best trade-off between size/cost vs frequency reproduction. Let's take a small 18m2 room as a variable to make things easier. My feeling is that 10" is going to provide enough clarity for lower frequencies (see organ reeds like a 32ft reed) but not going to be power overkill for the setup.</p></blockquote><p></p>
[QUOTE="defiantiger, post: 1106, member: 37"] Whew... technical overload for my brain, but let's see what's got in. Okay, stop me if I'm wrong at any point: Two main designs of subwoofer: Ported and Sealed. Ported seems to me to be more common, and offers greater real-world output in terms of power versus a sealed design, where the driver has to 'struggle' against itself in the box. However, a port can intruduce harmonic resonances (80 and 160hz resonances from a 40hz sine). So, uber-simplified tradeoff is power vs resonance, though all of this is dependant on many design variables, that cancels out any hard-and-fast rule in subwoofer design. Got to love how non-technical people can oversimplify, right? Just a point - surely another misconception is that you can place the sub anywhere in a room (can quote out of amp manuals ;) ) but it's placement can change the sound completely. Hence, sales people push much bigger subs than needed, when the correct placement of a smaller sub can deliver the desired sound. And what is the ideal entry-level size of a sub? Not that I've searched (its out there somewhere), but physics is going to prevent an 8" sub from creating certain frequencies accurately, right? But what is the enhancement from going to 8" to 10" and where is the best trade-off between size/cost vs frequency reproduction. Let's take a small 18m2 room as a variable to make things easier. My feeling is that 10" is going to provide enough clarity for lower frequencies (see organ reeds like a 32ft reed) but not going to be power overkill for the setup. [/QUOTE]
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Audio and Video Talk
General Discussion
Misconceptions in the SA general public regarding Home Cinema
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