{"id":4862,"date":"2014-08-27T17:15:16","date_gmt":"2014-08-27T05:15:16","guid":{"rendered":"http:\/\/abtec.co.nz\/blog\/?p=4862"},"modified":"2014-08-27T17:15:16","modified_gmt":"2014-08-27T05:15:16","slug":"polk-mm1240dvc-in-a-abtec-custom-4th-order-band-pass-enclosure","status":"publish","type":"post","link":"https:\/\/abtec.co.nz\/blog\/polk-mm1240dvc-in-a-abtec-custom-4th-order-band-pass-enclosure\/","title":{"rendered":"Polk MM1240DVC In a ABTEC Custom 4th Order Band-Pass Enclosure"},"content":{"rendered":"

Here at ABTEC<\/strong> we have been known to build Subwoofer Enclosures<\/strong> that can be a little different to the norm. We have built SPL Enclosures<\/strong> capable of 155+db<\/strong> (With the right amp, subwoofer & environment), low tuned Ground-Pounder Enclosures<\/strong>, beautifully sounding Loaded Horn Enclosures<\/strong> and everything in between. The one type of Enclosure<\/strong> we had not spent much time building were Band-Pass Enclosures<\/strong>, the reason behind this is that the design is very crucial and so is the driver selection but after hearing some very beautiful 4th Order Band-Pass Enclosures<\/strong> we just had to give it ago ourselves!<\/p>\n

\"IMG_1\"<\/a><\/p>\n

I already had a Subwoofer<\/strong> in mind for this build however that was thrown out the window once Ashley ‘MADD BASS’ Burrell<\/strong> had talked to our friends at Polk<\/strong>, the Subwoofer<\/strong> of choice even had me a little surprised and to be honest at first I wasn’t sure if it was going to be up for the task. The Subwoofer<\/strong> chosen for the job was the Polk MM1240 DVC<\/strong>, this little Subwoofer<\/strong> almost looks like a Passive-Radiator<\/strong> at first glance. That is until you notice the magnet has been designed to sit flush with the bottom of the basket allowing it be installed in smaller Enclosures<\/strong>, this was something that was going to work to our advantage since we wanted the 4th Order Band-Pass Enclosure<\/strong> to be able to fit into the boots of most cars.<\/p>\n

\"IMG_2\"<\/a><\/p>\n

Choosing the material’s for this 4th Order Band-Pass<\/strong> build was relatively easy since we already knew it would need to be strong and look the part too! So 25mm hard-wood ply for most of the Enclosure<\/strong> with a 25mm Perspex removable lid so you can not only appreciate looking at the Subwoofer\/Enclosure<\/strong> but also as an access point to install\/remove the Subwoofer<\/strong> in those worse case scenario’s when you push things over the limit. Now we had the materials sorted it was time to get the Enclosure<\/strong> built!<\/p>\n

Now that a couple weeks had past and we had finished building the Enclosure<\/strong> including the finishing touches like the brass rods for the voice-coil inputs, carpeting and painting the interior of the Enclosure<\/strong> it was now time to have a listen to it in our showroom. The amplifier we have powering it is a Orion Cobalt CO1200.1D<\/strong> which puts out a clean 600w RMS @ 1 Ohm<\/strong>, which should push the Polk MM1240 DVC<\/strong> quite nicely being rated at 425w RMS<\/strong>.<\/p>\n

\"IMG_3\"<\/a><\/p>\n

Now it was time to let the Polk MM1240 DVC<\/strong> run in for a good twenty hours but lets skip to my favourite part, listening to some music!<\/p>\n

As usual when we get a new Subwoofer<\/strong> and\/or Enclosure<\/strong> into our showroom I have a set playlist that I like to try out so I can get a fair comparison to the other Subwoofer Enclosures<\/strong> we also run in the showroom, this time I decided I’d try a couple of different songs that Ashley<\/strong> had been playing in the showroom before I had a listen to my playlist since he had been demoing them for a good two weeks. The first song tested was Enya – Only Time<\/strong>, this song surprisingly has quite low deep bass and this became even more apparent with it playing through the 4th Order Enclosure<\/strong>. The next song on the cards was The Eagles – Tequila Sunrise<\/strong>, the reason for choosing this song is that I really needed to know what it was going to sound like on older rock as a lot of Ported Bass-Reflex Enclosures<\/strong> struggle to play a wide range of genres but this is not the case with this 4th Order Band-Pass Enclosure<\/strong>.<\/p>\n

\"IMG_4\"<\/a><\/p>\n

Now I had got those songs out of the way it was time to try some bass heavy songs with various bass frequency ranges, so far I have not come across a music genre that will not play loud and clean in this Enclosure<\/strong>. I must also say that it is the most clean sounding Enclosure<\/strong> in our showroom and have had several people in the last week alone use the word “WOW”<\/strong> after being demo’d a song or two, because of this reaction I am going to try replicate this Enclosure<\/strong> but in a larger scale for two 12″ Subwoofers<\/strong> for my own personal car as it produces the exact sound I am looking for.<\/p>\n

So if you have time I recommend dropping into our ABTEC Showroom in Petone<\/strong> with some of your own music and ask for a demo, as I can most definitely can say the Polk MM1240 DVC<\/strong> in our Custom 4th Order Band-Pass Enclosure Sounds Alive!<\/strong><\/p>\n

 <\/p>\n

Lance ‘Captain Z’ Wilson<\/strong><\/p>\n

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

Here at ABTEC we have been known to build Subwoofer Enclosures that can be a little different to the norm. We have built SPL Enclosures capable of 155+db (With the right amp, subwoofer & environment), low tuned Ground-Pounder Enclosures, beautifully sounding Loaded Horn Enclosures and everything in between. The one type of Enclosure we had […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1,4,6,5],"tags":[],"_links":{"self":[{"href":"https:\/\/abtec.co.nz\/blog\/wp-json\/wp\/v2\/posts\/4862"}],"collection":[{"href":"https:\/\/abtec.co.nz\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/abtec.co.nz\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/abtec.co.nz\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/abtec.co.nz\/blog\/wp-json\/wp\/v2\/comments?post=4862"}],"version-history":[{"count":29,"href":"https:\/\/abtec.co.nz\/blog\/wp-json\/wp\/v2\/posts\/4862\/revisions"}],"predecessor-version":[{"id":4960,"href":"https:\/\/abtec.co.nz\/blog\/wp-json\/wp\/v2\/posts\/4862\/revisions\/4960"}],"wp:attachment":[{"href":"https:\/\/abtec.co.nz\/blog\/wp-json\/wp\/v2\/media?parent=4862"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/abtec.co.nz\/blog\/wp-json\/wp\/v2\/categories?post=4862"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/abtec.co.nz\/blog\/wp-json\/wp\/v2\/tags?post=4862"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}