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Sundown Z15 v.2 Producton Unit - First One
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<blockquote data-quote="sundownz" data-source="post: 6694462" data-attributes="member: 549523"><p>Built one yesterday to almost full production specifications -- only difference to production is a small change to the coil (those coils are not in stock yet -- they are the last part I need). So... that means once coils are in they are ready to roll for customers.</p><p></p><p><strong>Specifications :</strong></p><p></p><p>RE: 1.9 ohms (D1 in series)</p><p></p><p>FS: 42.2 Hz (5 minute break-in)</p><p></p><p>Qes: 0.480</p><p></p><p>Qms: 4.024</p><p></p><p>Qts: 0.429</p><p></p><p>Le: 0.980 mH</p><p></p><p>Vas: 49.725 L</p><p></p><p>BL: 16.238 NA</p><p></p><p>Mms: 251.09 g</p><p></p><p>Cms: 56.48 uM/N</p><p></p><p>Sens: 90.76 1w/1m</p><p></p><p>Sens: 97.00 2.83v/1m</p><p></p><p>FS will drop along with Qts as Cms increases with break-in.</p><p></p><p>Concentration of this design was low MMS and Inductance -- which worked out well as you can see. Spider compliance can be tailored to what is needed -- 3 spiders (standard) was used for the above spec measurements. I have put over 7000 watt bursts through a unit with only 2 spiders, though, so that is a great option for those not wanting to use huge amounts of power. Extra spiders can be added... I would never suggest more than five of these units, though.</p><p></p><p><img src="http://www.sundownaudio.com/misc/protos/NS-X/Zv2_Production/CIMG3377.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>* Light weight cone with narrow / tall surround (standard) -- optionally, the Nightshade cone can be used for ULTRA high power applications.. IMO, not needed for most daily setups (adds a good bit of MMS)</p><p></p><p><img src="http://www.sundownaudio.com/misc/protos/NS-X/Zv2_Production/CIMG3378.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>* Single lead spiders (standard) -- double lead are optional (anyone running amps under 1 ohm should get double leads, IMO)</p><p></p><p><img src="http://www.sundownaudio.com/misc/protos/NS-X/Zv2_Production/CIMG3379.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="sundownz, post: 6694462, member: 549523"] Built one yesterday to almost full production specifications -- only difference to production is a small change to the coil (those coils are not in stock yet -- they are the last part I need). So... that means once coils are in they are ready to roll for customers. [B]Specifications :[/B] RE: 1.9 ohms (D1 in series) FS: 42.2 Hz (5 minute break-in) Qes: 0.480 Qms: 4.024 Qts: 0.429 Le: 0.980 mH Vas: 49.725 L BL: 16.238 NA Mms: 251.09 g Cms: 56.48 uM/N Sens: 90.76 1w/1m Sens: 97.00 2.83v/1m FS will drop along with Qts as Cms increases with break-in. Concentration of this design was low MMS and Inductance -- which worked out well as you can see. Spider compliance can be tailored to what is needed -- 3 spiders (standard) was used for the above spec measurements. I have put over 7000 watt bursts through a unit with only 2 spiders, though, so that is a great option for those not wanting to use huge amounts of power. Extra spiders can be added... I would never suggest more than five of these units, though. [IMG]http://www.sundownaudio.com/misc/protos/NS-X/Zv2_Production/CIMG3377.JPG[/IMG] * Light weight cone with narrow / tall surround (standard) -- optionally, the Nightshade cone can be used for ULTRA high power applications.. IMO, not needed for most daily setups (adds a good bit of MMS) [IMG]http://www.sundownaudio.com/misc/protos/NS-X/Zv2_Production/CIMG3378.JPG[/IMG] * Single lead spiders (standard) -- double lead are optional (anyone running amps under 1 ohm should get double leads, IMO) [IMG]http://www.sundownaudio.com/misc/protos/NS-X/Zv2_Production/CIMG3379.JPG[/IMG] [/QUOTE]
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Sundown Z15 v.2 Producton Unit - First One
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