Cyburgs-Needle for Tangband W3-871S

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#381
hpolkerman said:
Just showing off my Needles(See atachment), build them with the Tangband w3-315SC the notch filter is kept outside the speaker.

The speakers sound very nice and detailed. You really can hear it's been made from brushed aluminium. Without the notch filter they're a bit harsh.

I've kept to the origional design, and added a chamber underneath for sandfilling. Painted them white (my first white speakers!). Actually I painted them black first, but I didn't like the color: white's more elegant.
Click to expand...


Very Nice! I was thinking of doing the same thing (Sand filled chamber underneath,) AS I have cats, and a boy that will be crawling / walking soon. But I think I may have to make a wider base for them when all is said and done.

Did you build with Ply? Mdf? What did you use for filling / smoothing the entire cabinet?
 
#384
gychang said:


I also made 2 separate pairs using the same drivers, used the notch filter for both.

They sound excellent with surprising bass.

gychang
Click to expand...

I know - pretty much mentioned right above this in regards to liking the treatment. Looks fantastic.

How do you find stability?

Also - any closer shots / details on how you accomplished this?

THanks! Always love seeing your builds.

Jonathan
 
#385
Hi !

In Spectrumaudio I see Needles kits (drivers and filter parts) with W3-871 and W3-315.
Anyone compared this 2 drivers ? Differences in sound ?

I have pair of Needles with FR8, built last winter, time to upgrade. Hard to decide, wich one to order.

Zigis
 
#387
Hi hpolkerman,
thanks for answer. Are you compare both drivers in your Needles ? What is diference in LF ?

I see 871 are 3 db more efecient.
I try 82 db FR8 with my 2W SET, good only for late night listening.

Mayby 88 Db 871 I can try with T-amp ? Anyone try this combination ?

Zigis.
 
#389
Zigis said:
Mayby 88 Db 871 I can try with T-amp ? Anyone try this combination ?

Zigis.
Click to expand...

I've listened a bit with a 41hz Amp6, which is very similar to a T-Amp. I think it's maybe slightly more powerful. It was enough, actually it sounded very very good, but I think I heard some nastiness at louder volumes. I didn't try my W3-871 needles with any other amplifiers, but a few more clean watts would probably be better. It's definitely worth having, as a system.

The T-Amp would probably need new input caps to fully utilize the Needles' nice bass.
 
#390
I'm using the Charlize and Amp6 with the Needles with a Omnes Audio BB 3.01. This combination is perfect for lower volumes.
I don't know what the Needles do on bigger amps. It seems to me that the T-amps reach pretty much the limit of what Needles can handle...
 
#392
finally got the notch filter in mine. everyone was right, huge improvement.

before - short listening periods, even at low volumes, caused my ears to be strained.
after - listened to them for good half hour on low volume with now issues of fatigue. turned them up for quite a while and jammed out and still had no issues.

as stated before, im still new to the whole design concepts. could someone point me to a website or give me lil explanation as to how the inductor, resistor, and cap work together to make a notch filter. and also as to which freq range this notch filter is actually affecting. thanks. 😱
 
#393
You could download BoxSim.

It uses Visaton parts, and is very easy to setup.
You could test yourself you're notch filters on a fullrange and see what it does....

That's how I've checked my knowledge about the parts if I wasn't sure. And it's allways nice to see a speaker unit react on your filter designs.

There are some nice books and some nice webpages that cover some parts of speaker diy:

http://www.lautsprechershop.de/english/index_tools.htm
http://www.carstereo.com/help/Articles.cfm?id=23
http://www.carstereo.com/help/Articles.cfm?id=19
http://www.lalena.com/Audio/Calculator/ParallelNotch/

Just try some with your current speaker&notch!
 
#394
Zigis said:
Hi !

In Spectrumaudio I see Needles kits (drivers and filter parts) with W3-871 and W3-315.
Anyone compared this 2 drivers ? Differences in sound ?

I have pair of Needles with FR8, built last winter, time to upgrade. Hard to decide, wich one to order.

Zigis
Click to expand...


hpolkerman said:
I would order the w3-315sc, it has a much clearer mid and high.

Especially the high tones are important to me (for jazz and classical music)

But it's a close call I guess... 😉
Click to expand...

well, it's not that close, it's a matter of taste. the 871 is much more friendly, but misses the briliance of the 315, but the latter could be to much for some (they are to me). in low end not much difference.

but as stated many times before: the BB3.01 is an exelent driver for the Needle, very nice highs but friendly, slightly better lows than both W3's and FRS8, well worth the extra euro's
 
#396
A 114M4 said:
as stated before, im still new to the whole design concepts. could someone point me to a website or give me lil explanation as to how the inductor, resistor, and cap work together to make a notch filter. and also as to which freq range this notch filter is actually affecting. thanks. 😱
Click to expand...

The inductor lets low frequencies through, the cap lets high frequencies through. Selecting their inductance and capacitance values, they block or impede a certain part of the spectrum - creating a notch. The resistor basically determines how 'deep' the valley is, if I understand this correctly. I'm electronics-naive, though.

I wish I had an URL to give you 🙂

This calculator shows you approximately attenuation (loss of power) at various frequencies, given certain component values:
http://lautsprechershop.de/tools/t_ps_schwingkreis_en.htm

The other day, I snagged the Javascript behind that form to see how the calculation works, and found that the center of the dip is around 2600Hz IIRC. I don't remember the exact decibel cut.
 
#397
Here is the measured effect of the Needle filter with the W3-871S. Electric attenuation at speaker terminals:

Svein.
 

Attachments

  • needle-filter.gif
    needle-filter.gif
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#398
Zigis said:
What kind of notch filters you use with BB3.01, same as with Tangband or different ?
Click to expand...
different, the BB3 is 4ohm and has different Qe and Le.

you could try either of the following:

C1 5,6 uF, R1 5,6 Ohm, L1 0,56 mH

or the one in the attachment, where the C2,L2,R2 is optional for a sometimes observed spike at ~9kHz (I have mine with this notch without the optional bit)
 

Attachments

  • needle_filter_bb301.jpg
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#400
In reply to the picolino,

I've made them as a test and I didn't like the transparenty of it. I've used the standard picolino setup with the notch filter.

I found them te be a bit 'damped', not as clear as I hoped them to be.

My second test was a bit more promising: The @-horn build a bit bigger (I call it the G-horn) tested these with the picolino notch and with the new Picolino MK2 notch filter.

The speaker has a better spread/spacious and is more clear to my ears. The picolino MK2 notch filter is a bit better then the picolino origional.

I'm planning more tests when I finish my other project...
 

Attachments

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