{"id":255,"date":"2021-12-08T17:36:16","date_gmt":"2021-12-08T15:36:16","guid":{"rendered":"http:\/\/jasun.hifisivut.dy.fi\/?page_id=255"},"modified":"2025-08-28T17:44:16","modified_gmt":"2025-08-28T14:44:16","slug":"the-1515-project","status":"publish","type":"page","link":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/hifi\/the-1515-project\/","title":{"rendered":"The 1515 Project"},"content":{"rendered":"\n

The road with SLS8″ has been gone through. <\/p>\n\n\n\n

Those cannot give me any more. <\/p>\n\n\n\n

Also middles and tweeter needed something new. <\/p>\n\n\n\n

<\/p>\n\n\n\n

Woofer section<\/h2>\n\n\n\n

I have long time had idea to update my woofers to something new, with much improved low end. When I had possibility to obtain Dayton Audio RSS390HO-4, I knew that i have to try those. <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

First simulations with 65 liters closed box seems to be promising. <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n

End result, MDF enclosures. <\/p>\n\n\n\n

Upper section<\/h2>\n\n\n\n

But then, what to have as middles and high frequencies?
I have heard some nice demos of PA coaxial elements.
Then I decided to byu audiovideo Piste15″ kit
Kit has B&C15CNX76 element and passive crossover.
But ofcouse i could not follow kit.
Kit is for full frequency range with reflex enclosure.
I decided to do Dipole and only from 200 and up (daytons should do below 200). <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n
\"\"<\/figure>\n\n\n\n

<\/p>\n\n\n\n

Once again with MDF. <\/p>\n\n\n\n

End result<\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n

Current speakers are more or less proof-of consept, not final versions, so therefore finish of enclosures is a bit quick and dirty. I used dc-fix membrane (self-adhesive thin coloured). Not looking nice, but speakers are still one colour. <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

Frequency responce of left speaker from listening position.I am pretty happy with it. Response is ok and low freqyency is extended to 15Hz (no eq on woofer, just room boost). <\/p>\n\n\n\n

\"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

The road with SLS8″ has been gone through. Those cannot give me any more. Also middles and tweeter needed something new. Woofer section I have long time had idea to update my woofers to something new, with much improved low end. When I had possibility to obtain Dayton Audio RSS390HO-4, I knew that i have … <\/p>\n

Jatka lukemista<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":19,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-255","page","type-page","status-publish","hentry","nodate","item-wrap"],"_links":{"self":[{"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/pages\/255","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/comments?post=255"}],"version-history":[{"count":4,"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/pages\/255\/revisions"}],"predecessor-version":[{"id":268,"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/pages\/255\/revisions\/268"}],"up":[{"embeddable":true,"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/pages\/19"}],"wp:attachment":[{"href":"http:\/\/jasun.hifisivut.dy.fi\/index.php\/wp-json\/wp\/v2\/media?parent=255"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}