Single 21" reflex plans? |
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krazyneil
Young Croc Joined: 06 December 2007 Location: Bolton ,lancs Status: Offline Points: 1206 |
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I think tony did a Q21 for somebody might be worth asking bee if he still has the plans
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GOD TOLD ME TO DO IT !!!!!
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Father-Francis
Old Croc Joined: 24 October 2007 Location: Kenya ,Denmark Status: Offline Points: 2760 |
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So some 21" Pd's landed from Andy , prototype box cut and am putting it together Ready for testing from Sunday , will let you know how it sounds . |
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Music is the strongest form of magic.(+45 31879997)blakmanpro@gmail.com, foa@sweetboxaudio.dk
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Father-Francis
Old Croc Joined: 24 October 2007 Location: Kenya ,Denmark Status: Offline Points: 2760 |
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So will be testing tomorrow, will keep you updated |
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Music is the strongest form of magic.(+45 31879997)blakmanpro@gmail.com, foa@sweetboxaudio.dk
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AndersB
New Member Joined: 13 February 2017 Status: Offline Points: 3 |
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I have built a total of 12 boxes, using 21" drivers ,,,, but a little higher and deeper than 60 60 60 .....
= 61 wide, 90 height, to make room for long bottom ports, and 73 deep, for added volume, and better internal ratio (no square design, of inside measurements.) construction foam and bitumen sheets inside as dampening. two round ports at 20cm diameter. They can be a bit smaller, in volumen, but i would also say 60 60 60 is too small, considering ports should be (very) large.... I used 18mm birch plywood, with dual front 36mm,,, .... and one crosssection of 3 stiffeners going from front/back - top/bottom - and side/side, meeting in the middle .... Accoustically, when i put the setup as 2x4 boxes, they are able to play so deep, that your stomach really turns, hard to describe otherwise, i have not heard anything like it... i used 4 amps at 2500w (4000w peak), 4 ohm. and a record player! ... digital songs dont play as deep... the force of 21" inch really shows in this ported design...: A 18" driver would not be able to go higher than 400-500 w, due to excursion limits - it's around 13-15 mm at this power lvl, when you look at excursion around the 30 Hz .... meaning a 18" ported design really is meaningless for highest output. ... --- when 21" is used, excursion max is more like 1300-1500 watts at 30 hz ... only drawback to using 21", is that the big enclosure, makes the box have a rather long echo, so i cant play the higher end bass (100-120 hz) very precisely... (compared to e.g. a tight punch from a 15" JBL 2226) ... but if highest and deepest possible bass output is required, you are on the right track. --- nothing compares to 21" port reflex :)) https://www.dropbox.com/sc/1cwipl3we6gdjsv/AACErnbIkQWkSpc_A21pykz1a https://www.dropbox.com/s/9temmlasmlpdr11/2013-10-22%2020.36.08.jpg?dl=0 https://www.dropbox.com/sc/bk8ojpwoc2xykvq/AAB-h6gbji1Z-qTLyPyg9Xaaa https://www.dropbox.com/sc/9v3b2h3fwztt90x/AAAccqLvx1HMovEAQ8A-a4uia https://www.dropbox.com/sc/u7v3gw2uckk02ui/AAA3Yx_QBI3j5bHK66j7jdLra https://www.dropbox.com/s/dju4oxy1xl0lx9p/IMG_20170213_113914.jpg?dl=0 1:1 wave / full range horn - low-cut-off 69Hz (=> flat to 75-80 hz)... : https://www.dropbox.com/s/m5o5f8t40q0zs3y/2013-04-30%2018.55.29.jpg?dl=0 https://www.dropbox.com/sc/8cg55rf1iqbg812/AACEvkEcpcco7uX5lyqvwRjEa https://www.dropbox.com/sc/ijl74ifg1j2zf8v/AACvjHJ-ewPXsCl7d3oz2F9Ka https://www.dropbox.com/s/jplinwcc41zno51/11892146_10155995361270574_2751972599658977769_n%20%281%29.jpg?dl=0 ...the top four is flipped upside down, when playing :) ...: https://www.dropbox.com/sc/y2z1ai6sqon0cg4/AADIIyPKVfxOswi-Lr0yvw44a Edited by AndersB - 13 February 2017 at 11:42am |
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Father-Francis
Old Croc Joined: 24 October 2007 Location: Kenya ,Denmark Status: Offline Points: 2760 |
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hvor er du fra, er du fra havnen |
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Music is the strongest form of magic.(+45 31879997)blakmanpro@gmail.com, foa@sweetboxaudio.dk
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AndersB
New Member Joined: 13 February 2017 Status: Offline Points: 3 |
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oprindelig fra Herlev :) ,,, har boet på nørrebro i ca 10.... Vi hilste helt kort på hinanden, inde på stengade,,, for ca. 6-7 år siden ca,,, tiden går... :)
højtalerne står lidt stille for tiden, men dejligt der sker noget :) ... de 8 af dem er solgt. har fire tilbage, som måske kommer ud og lufter til sommer.... |
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Father-Francis
Old Croc Joined: 24 October 2007 Location: Kenya ,Denmark Status: Offline Points: 2760 |
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jeg bor ved forum, we should hook up boss
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Music is the strongest form of magic.(+45 31879997)blakmanpro@gmail.com, foa@sweetboxaudio.dk
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AndersB
New Member Joined: 13 February 2017 Status: Offline Points: 3 |
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Fedt... Det vil jeg gerne ... de sidste 3 højtalere er kun 90 pct færdige, så det kunne være en god lejlighed til at få de sidste klar, og jeg har pt kun 1 digi amp, (med dsp) ...
Jeg kan smide noget af det på en trailer, så kan vi høre det? ... du kan bare skrive når det passer dig. no rush fra min side i hvert fald :)
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audiomik
Old Croc Joined: 06 April 2010 Location: Bath, UK Status: Offline Points: 2962 |
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Have full set of plans for the Q21 but will need time to extract them from an old PC. Otherwise do a search on here for Q21 as there is a dedicated thread on it Mik |
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Warning! May contain Nuts
plus springs, washers, screws, etc, etc. |
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bee
Old Croc Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4553 |
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@ Audiomik, the plans have been taken out of the public domain, I'm still happy to give them away, as long as a donation is made to the british heart foundation in Tonys Memory... the q21 plans were only ever shared to a very few people, to my knowledge the only ones every built were the ones muckerbarns had cnc cut. These were then sold and I have them in the workshop. Ill get some pics posted.
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https://www.elements-audio.com
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bee
Old Croc Joined: 14 June 2011 Location: Middlesex Status: Offline Points: 4553 |
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https://www.elements-audio.com
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patryk1305
Registered User Joined: 13 December 2012 Location: United Kingdom Status: Offline Points: 488 |
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