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New 3-way mid-top |
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ceharden 
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Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11851 |
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 Topic: New 3-way mid-topPosted: 01 March 2020 at 8:24pm |
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Another much overdue new design:
3-way mid-top for small venues. 12"+8"+1".   Getting the combined rear chamber and port design right took a bit of thought. Drivers are all 18Sound. 12ND930, 8M400 and NSD1095 on XR1064. Runs 2-way active with a custom passive crossover between the 8" and 1". |
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colint
Old Croc 
Joined: 06 October 2007 Location: United Kingdom Status: Offline Points: 5260 |
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Posted: 01 March 2020 at 9:49pm |
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Nice looking box
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Never criticise another man until you've walked a mile in his shoes. Once you have, call him what you like, you're a mile away and you've got his shoes!
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Dub Specialist Sound
Old Croc
Joined: 15 November 2013 Location: Smethwick Status: Offline Points: 4871 |
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Posted: 01 March 2020 at 9:51pm |
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Nice build , nice works..respect..
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Musical Roots Reggae Vibration is Life! for music is sound...sound is vibration...vibration is energy... and energy begets life. Therein lies my passion!...MUSIC IS LIFE...
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JonB67
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Joined: 22 April 2016 Location: UK Status: Offline Points: 1352 |
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Posted: 01 March 2020 at 10:53pm |
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really nice Chris.
bet it sounds great.
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VECTORDJ
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Joined: 11 June 2006 Location: United States Status: Offline Points: 585 |
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Posted: 01 March 2020 at 11:21pm |
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A+
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ceharden
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Joined: 05 June 2005 Location: Southampton Status: Offline Points: 11851 |
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Posted: 02 March 2020 at 1:06am |
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Luckily I'm able to get wood CNC'd fairly easily. I'm far too lazy nowadays to cut everything from scratch. Still took many hours working on the CAD though.
I haven't gigged them yet but testing so far is promising. The 8" is covering ~400Hz to 2.4kHz and the TiN diaphragm on the 1" is quite nice. The impedance lumps on the 1" around the crossover region caused a few issues with the passive crossover design but managed to make it work without adding lots of extra compensation components. If you're wondering, 2.4kHz was settled on because it's a half wavelength of the 8"/1" driver offset so you can effectively get them in phase at the crossover point. Yes you get issues either side but it works well enough. It's the first cab I've designed for myself for a long time, have had the drivers lying around for years. Originally I was working on all kinds of complex horn loaded designs but realised for a lot of the jobs I do in small venues, something like this would be far more useful. Next up is something new to do the bass underneath... |
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odc04r
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Joined: 12 July 2006 Location: Sarfampton Status: Offline Points: 5469 |
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Posted: 02 March 2020 at 10:54am |
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Nice work there, I still have a load of your old bits in the garage and one day I'll do a similar project. Sometimes trying tomake the best thing you can out of a pile of odd bits is an interesting challenge. You don't go back once you've got a decent CNC though do you. I was thinking the other day that with the right workflow angled cuts wouldn't be too hard or take too long. |
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MattStolton
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Joined: 04 September 2010 Location: Walthamstow Status: Offline Points: 4207 |
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Posted: 02 March 2020 at 2:31pm |
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Sometimes, reflex is all you need!
Look tidy. Personally I may have tried a 15/8/1, just to help out lower, but obviously box size goes up, which I presume was not your aim! Bit of a fan of a mid doing 400-2.5K ish. I have always had a worry about voice fundamentals 200-400, and then rest of voice in a different driver, but seems to hold together in my experiences. |
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Matt Stolton - Technical Director (!!!) - Wilding Sound Ltd
"Sparkius metiretur vestra" - "Meter Your Mains" |
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MPASOUND
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Joined: 25 April 2006 Location: UK Status: Offline Points: 272 |
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Posted: 04 March 2020 at 10:05am |
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Very nice looking project! NSD1095n is my favourite 1" driver.
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It's just bits of paper flapping about in a box.
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dlyxover
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Joined: 14 June 2007 Location: Liverpool Status: Online Points: 1526 |
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Posted: 05 March 2020 at 7:37pm |
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tidy looking enclosure
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Lignum_ww@icloud.com
GNKaudio@icloud.com |
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BP1Fanatic
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Joined: 02 August 2009 Location: Columbus, Ohio Status: Offline Points: 107 |
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Posted: 10 March 2020 at 6:12pm |
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Nice work! Can you post some measured graphs?
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Mark James
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Joined: 15 January 2006 Location: rig side Status: Offline Points: 5306 |
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Posted: 11 March 2022 at 1:39pm |
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Hey does your cnc guys charge much? I need to get some cabs sorted for someone and im not far away from you
Love this new top btw
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insert silly sentence here
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