Cyburgs Needles replica This time was a diary, rather a guide to a mitlerweile Cyburgs NEEDLES reproduction.
Here you can see a time, where I have ordered the 4 ohm version FRS8: click
Materials needed: first
massive MDF about 12 m² per box NEN ~ 15 € per Box
second Chassis (the speaker) - which are very small ....
Visaton FRS 8 or Fostex variant ~ each 15 €
third Connection terminals
4th Screws, fifth
Cable,
6th ~ Polyester fleece in a set with all the speakers here ...
7th small pieces of wood (88) which I have from 2 metrigen cut rods and ground. (The sticks) ... I connect to the MDF panels later.
only glue to me then but a little too "sticky / wobbly" and the wooden pins do not make a lot of work.
The MDF comes from the practitioners and also costs nciht the world.
together - mdf and glue has ~ 36 € cost.
The chassis and the rest of the accessories are all of loudspeaker DIY (65 € I think)
later bissl paint / color / ... ka I do not know yet and you are boxing for 4 at, say 120 € -> 30 € per box includes (without working)
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The needles on the tqwp speakers. that is, the transition of the box a Virtel is as long as the wavelength of the resonance frequency. (Because you can correct me calm, who has more foreboding)
NEN chassis is still moving from ner membrane, and thus pressure differences (tones) are produced. A wave is radiated forward and backward (180 ° phase). may be the problem that the air-so simply rumströmen and can compensate for this (-> no sound).
So you build a housing, so this does not happen (the acoustic short circuit). disadvantage, however, that one is needed quite a (infinitely) large exterior, with NEM small housing, the pressure caused so again against the membrane and thus curbing the membrane (-> soft and fuzzy)
So are many different housing designs, the different / cut gain distortion / / ...
The "tapered quarter-wave pipe" case has now NEN speaker output is exactly the ne Virtel wavelength. Now if the membrane moves forward, a wave and a blast to the back. which is radiated to the back is now back out front. but this time not out of phase by 180 °, but - now is the part I still nciht exactly understand. theoretically sound but must be back in phase (0 °
, but at Ner Virtel wavelength but he is just 90 "shot" - so that the waves wipe out no longer, but increase (-> up) ...
(on the link above to find ne DIY speaker better explanation, I think
)
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Small Guide:
MDF deal cut under the plan of Lautsprecherselbstau or from the the hi-Forum ... (The same)
holes for wooden pegs and beneficial for the drivers and terminal as well. This is best to use a hole saw. Which there is the hardware store as a centerpiece for the drilling machi used consisting of a plate in a circular saw blade. FRS 8
my way, I'm involved from behind. and hope it does not change too much the sound ... but also an installation of the front is possible, and facilitates subsequent replacement.
so now would be almost time for the needle to paint when wöllte make it more colorful. But here is now clear why many do not. either one glues together the speaker, grinds it at all corners nice and clean and smooth then painted or varnished and has one but no longer the possibility to him at the abutting edges to make it ideal smooth.
are now glued to the inner parts of a side wall. top, bottom and the 2nd part has to have been later.
is playing a few millimeters inside does not matter, the main cause of the "horn"-course is fairly tight, and the front where the speaker is mounted, includes air, and thus largely soundproof from.
fix with clamps and let it dry ... most of the night.
weggeschneiden then glue residue or sand away ...
here are some pictures:
Then the second Glue the side wall and the floor.
With a little practice in it, which can also equal to the 2 Glue the side wall with the inner parts but then there is the risk that something you can slip and it can not change later.
I recommend then with NEM grinder until coarse (90?) And then again to grind fine with the 320s speakers completely. The cover can even stop by eingiermaßen be abraded. He can be fixed with screws to ... However, you can see the holes later, or must leave the screws in it.
and here are pictures as it should look now:
makes one now on up to the desired box number in body shop has done.
It is recommended now to round the edges of the boxes, including one for example can use a rasp and then sandpaper.
are now the speaker, some times painted (primer) ...
(Pics on the still, not all edges rounded)
are now all with based on Alcydharz (such as the primer) hochgläzendem lacquer finish. (That looks a little warmer ... no idea, it is pure white on it, maybe the rust out of the can to blame ^ ^) is
comes after 2 coats of primer and paint now at least a layer of clear coat on it, otherwise you have every time for all gray or black marks on the paint if you somewhere offend. He is better now wiped off - is my unconditional recommendation. I recommend 2 or 3 coats of clear lacquer, but also more damaging.
on a photo you can see how the paint reflects the flash ...
and last seen two fluorescent lamps mirrored in the needle ...
Now remove the cover, if installed already been (aua. .. the beautiful paint !)...
Now comes the pure polyester fleece.
do I have a packet sonofill first half times (in the thickness, so be careful to pick over-layers apart ... this will then shift to a needle.
half the cotton is halved again. Now we have already 4 ... and these are quarters then halved again and cut into thirds. hinbekommt depending on how it without tearing it.
since then I've always spent a few "hills" and then the whole hochgerupft all loosely to 2 long "sausages" rolled.
the 2 "sausages" should now be 50 cm long each, so that the front wedge and the deflection is insulated well. there have still extra time in my well read and hifi thread Cyburgs (inventive), it meant exactly that!
then the first wurst purely in the needle.
now best to solder the speaker wire to the membrane ... about a half meter long, so that at the terminal (the connection back) last.
then you must tighten the FRS 8 ... the bolts are clipped on the head because they are usually too long (for installation from the inside) ... or simply screw on it in front installation. Here you have to work very closely here may NOT be air hole, otherwise the acoustic short-circuit is coming and it sounds horrible, especially low tones with large wavelength.
lead then the cable through the box and out run down the terminal and the same is then soldered and then push in easily into the opening, provided it exactly the hole you cut out;)
If you ever have a little verschnitzt which may incidentally wood with wood filler offset from the hardware store - is not times expensive ~ 6 € ... will be processed as a paste and dries hard as wood.
closes when installing inside the FRS8 now fairly well from the front baffle. No more gaps as it happens with the built-in version available from the beginning. (Due to the design of the chassis, because that is built for back inlet afaik)
and then as in the photo above the 2nd roll insulation in and she zerrupfen best up a bit ...
then put the lid back and maybe even a coat of clear lacquer over the entire speaker - except for the terminal and the membranes - these may not even get the tiniest splash of paint!
and here the FINNISH:
I then cover again painted white because there through the install of the paint was a little messy, and will be painted again clear. that is why the photos did not quite finish
the far left, incidentally NEN other foot, but the extra is so, so he with me in a corner of the room fits ...
__________________________ join
on the music system and test it!
sound pretty accurate and have good low tones troztdem ... the instruments sound like instruments that be right and no such frequency is particularly intrusive. mitlerweile I have a little more effectively and think it is still titrate, but fabulous for the price.
but must also say the same: really noisy, they do not. So if you ever want to organize very ne party man with> 30, was still a sub and others to make. But for NEN normal room more than adequate.
I also recommend an additional subwoofer of the 100 Hz is cut off.
This completes the sound.
For Comments, or suggestions I'm open.