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Polk SR6500 review
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<blockquote data-quote="FJF" data-source="post: 5971006" data-attributes="member: 601907"><p>It's worth a shot. When I originally tuned the system, I played with a variety of crossover points and kept notes on each one. Going back for a retune, I reviewed the notes and started working with alternate permutations, eventually arriving at the present config.</p><p></p><p>I also find that walking away from tuning helps. I know from experience that my ears lose their acuity after ~1/2 hour of concentrated listening. If I'm tuning, say, the EQ, and I make more than 2-3 changes in that time period, I shut off the system and come back later.</p><p></p><p></p><p>HU - Alpine 9887</p><p></p><p>Tweeter amp - ARC Mini (to be replaced with a Zapco 200.2 later this week)</p><p></p><p>Mid amp- Zapco AG350</p><p></p><p>Sub - Blaupunkt PCwb1200 in 1.5ft3 ported (this thing is sensitive enough to drive with a hair dryer)</p><p></p><p>Sub amp - PG Xenon X400.1</p><p></p><p>Car - Evo IX SE</p><p></p><p>The mids are mounted in the factory locations low in the doors. The doors are deadened and sealed with RAAMmat. Due to the Polks' prodigious low-end dynamics, I still need to address an audible vibration in the door cards that manifests itself at ~80Hz.</p><p></p><p>The tweeters are installed low in the A-pillars. As the tweeters' frequency response noticeably varies with positioning, I tried to aim them symmetrically. Meaning, both are off-axis to the listener.</p><p></p><p>Due to the nature of the car, weight was and still is a major consideration: the sub and its enclosure weigh a total of 33lbs, the amp racks are made from Baltic Birch to save weight...well...you get the picture.</p><p></p><p></p><p>I found that having the tweeters on/off axis was mostly a matter of amplitude. The musical information remained; it was just projected at a lower relative volume. This said, I usually aim high-rez (home) speakers directly at the listener's ears and gain a greater sense of focus.</p><p></p><p></p><p>Any time. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif</p></blockquote><p></p>
[QUOTE="FJF, post: 5971006, member: 601907"] It's worth a shot. When I originally tuned the system, I played with a variety of crossover points and kept notes on each one. Going back for a retune, I reviewed the notes and started working with alternate permutations, eventually arriving at the present config. I also find that walking away from tuning helps. I know from experience that my ears lose their acuity after ~1/2 hour of concentrated listening. If I'm tuning, say, the EQ, and I make more than 2-3 changes in that time period, I shut off the system and come back later. HU - Alpine 9887 Tweeter amp - ARC Mini (to be replaced with a Zapco 200.2 later this week) Mid amp- Zapco AG350 Sub - Blaupunkt PCwb1200 in 1.5ft3 ported (this thing is sensitive enough to drive with a hair dryer) Sub amp - PG Xenon X400.1 Car - Evo IX SE The mids are mounted in the factory locations low in the doors. The doors are deadened and sealed with RAAMmat. Due to the Polks' prodigious low-end dynamics, I still need to address an audible vibration in the door cards that manifests itself at ~80Hz. The tweeters are installed low in the A-pillars. As the tweeters' frequency response noticeably varies with positioning, I tried to aim them symmetrically. Meaning, both are off-axis to the listener. Due to the nature of the car, weight was and still is a major consideration: the sub and its enclosure weigh a total of 33lbs, the amp racks are made from Baltic Birch to save weight...well...you get the picture. I found that having the tweeters on/off axis was mostly a matter of amplitude. The musical information remained; it was just projected at a lower relative volume. This said, I usually aim high-rez (home) speakers directly at the listener's ears and gain a greater sense of focus. Any time. [IMG]//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif[/IMG] [/QUOTE]
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