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<blockquote data-quote="thylantyr" data-source="post: 4013891" data-attributes="member: 560358"><p>Don't be dissuaded, SQ can be improved.</p><p></p><p>Some random thoughts;</p><p></p><p>1. Line array power handling is much higher than a normal speaker.</p><p></p><p>2. Your reciever is a power bottleck -&gt; <em>My towers maxed a 112c </em></p><p></p><p>3. <em>Crossover is a simple 12db both ways at 4.5khz.</em> - this can affect</p><p></p><p>perception of SQ.</p><p></p><p>'Calipso's array;</p><p></p><p><a href="http://home.pacbell.net/lordpk/speaker/94.jpg" target="_blank">http://home.pacbell.net/lordpk/speaker/94.jpg</a></p><p></p><p>Same tweeters are yours, IIRC. He uses Sammi midranges each in a PVC tube</p><p></p><p>to extend the bass. He loves this. He uses analog electronic crossovers and</p><p></p><p>some amps, I forgot which ones. He swears by the sound.</p><p></p><p>When I do crossover frequency sweeps with my budget array, but I have PT2</p><p></p><p>tweeters not domes, same mids as you, I notice the SQ opens up with a lower</p><p></p><p>crossover point as the tweeters are doing more work. I run my crossover at</p><p></p><p>1.7khz, 48dB/octave. The $4 dome tweeters are limited and you may be able</p><p></p><p>to only go down to 2.5khz, but maybe that is enough to get SQ to improve?</p><p></p><p>I would use a steeper slope, at least 4th order.</p><p></p><p>When I tested my array with a chipamp DIY amplifier, the array sounded fine,</p><p></p><p>good enough for the average person to be happy with, but replacing the</p><p></p><p>low powered amp with a high powered, high headroom, pro amp opened up</p><p></p><p>a new door to SQ. When I upgraded the amps again and bridged them, it's</p><p></p><p>mania. The perception of squashed dynamics is gone, the crack of the snare</p><p></p><p>drum feels real as if the guy is in your room beating on the drum in front of</p><p></p><p>you.</p><p></p><p>Digital crossover: I use the delay feature an add 15mS delay to one speaker</p><p></p><p>channel, to simulate depth as in a 'concert hall effect'. This adds to the SQ.</p><p></p><p>Some sources may have this ability too.</p><p></p><p>Do you high pass the NSB's ? Those are nice drivers if you keep them in</p><p></p><p>a good bandpass. I use a high pass and the settting is determined by</p><p></p><p>ear and feel based on power and listening mood. For example, the WinISD</p><p></p><p>model I did was to have a 100hz tune. In theory, a high pass of 100hz is</p><p></p><p>ideal. But in reality, I could go lower. I was cranking tunes, looking at the NSB</p><p></p><p>cone movement and sweeping the high pass. I used 48dB/octave setting</p><p></p><p>so I was able to set the high pass to 65hz as the best fit. This high pass</p><p></p><p>keeps the bass out and the power handling high.</p><p></p><p>Stay focused on arrays, they rule.</p></blockquote><p></p>
[QUOTE="thylantyr, post: 4013891, member: 560358"] Don't be dissuaded, SQ can be improved. Some random thoughts; 1. Line array power handling is much higher than a normal speaker. 2. Your reciever is a power bottleck -> [I]My towers maxed a 112c [/I] 3. [I]Crossover is a simple 12db both ways at 4.5khz.[/I] - this can affect perception of SQ. 'Calipso's array; [URL="http://home.pacbell.net/lordpk/speaker/94.jpg"]http://home.pacbell.net/lordpk/speaker/94.jpg[/URL] Same tweeters are yours, IIRC. He uses Sammi midranges each in a PVC tube to extend the bass. He loves this. He uses analog electronic crossovers and some amps, I forgot which ones. He swears by the sound. When I do crossover frequency sweeps with my budget array, but I have PT2 tweeters not domes, same mids as you, I notice the SQ opens up with a lower crossover point as the tweeters are doing more work. I run my crossover at 1.7khz, 48dB/octave. The $4 dome tweeters are limited and you may be able to only go down to 2.5khz, but maybe that is enough to get SQ to improve? I would use a steeper slope, at least 4th order. When I tested my array with a chipamp DIY amplifier, the array sounded fine, good enough for the average person to be happy with, but replacing the low powered amp with a high powered, high headroom, pro amp opened up a new door to SQ. When I upgraded the amps again and bridged them, it's mania. The perception of squashed dynamics is gone, the crack of the snare drum feels real as if the guy is in your room beating on the drum in front of you. Digital crossover: I use the delay feature an add 15mS delay to one speaker channel, to simulate depth as in a 'concert hall effect'. This adds to the SQ. Some sources may have this ability too. Do you high pass the NSB's ? Those are nice drivers if you keep them in a good bandpass. I use a high pass and the settting is determined by ear and feel based on power and listening mood. For example, the WinISD model I did was to have a 100hz tune. In theory, a high pass of 100hz is ideal. But in reality, I could go lower. I was cranking tunes, looking at the NSB cone movement and sweeping the high pass. I used 48dB/octave setting so I was able to set the high pass to 65hz as the best fit. This high pass keeps the bass out and the power handling high. Stay focused on arrays, they rule. [/QUOTE]
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