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What driver is used in these speakers?
- Thread starter Hayk
- Start date
JSmith
Master Contributor
Looks like;
www.visaton.de
... with phase plug;
JSmith
B 200 - 6 Ohm | Visaton
20 cm (8") High-end full-range loudspeaker. These high-end speakers stand out because of their high degree of sensitivity and extremely well-balanced frequency response free of noticeable deviations. This is achieved by using a very light-weight paper cone, a fabric surround and an optimised...
JSmith
- Thread Starter
- #3
Thank you very much.
It needs 100 liter volume for 1.1Qts. It is 40Hz/0.75Qts with 100l eq suspension volume. It can't go so low in such small enclosure. There must be a subwoofer, amplified or passive? For the high frequencies, because too directive.
It needs 100 liter volume for 1.1Qts. It is 40Hz/0.75Qts with 100l eq suspension volume. It can't go so low in such small enclosure. There must be a subwoofer, amplified or passive? For the high frequencies, because too directive.
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That's like judging the picture quality in a TV advertisement that you're watching on your TV.- Thread Starter
- #5
Comparative demonstration with lm3886 XY board could give a more convincing result. The problem with recordings is the automatic level control. It compresses the dynamic but without it, one needs cardioid mic to avoid the room sound.
Here, non comparative form, I can only guess the tonal balance and it doesn't add up.
To remind that MP3 128KB, erases sound level bellow -60db, the limit of adult human perception.
Here, non comparative form, I can only guess the tonal balance and it doesn't add up.
To remind that MP3 128KB, erases sound level bellow -60db, the limit of adult human perception.
The specs claim a -6 dB of 65 Hz, and recommend a subwoofer.
They also use a compensation network for the driver to make it work in the small box:
It’s mainly the 470uF cap, which forms a highpass. It’s a trick that became somewhat popular years ago, mainly in the German DIY scene:
This actually works quite well in boosting some bass down low in high Qts configurations. But it’s obviously not a magic bullet. I used it once in a small 10” passive subwoofer with some success.
They also use a compensation network for the driver to make it work in the small box:
It’s mainly the 470uF cap, which forms a highpass. It’s a trick that became somewhat popular years ago, mainly in the German DIY scene:
Geschlossenes Gehäuse
Beschreibung eines Subwoofers mit geschlossenem Gehäuse
lautsprecher-berlin.de
This actually works quite well in boosting some bass down low in high Qts configurations. But it’s obviously not a magic bullet. I used it once in a small 10” passive subwoofer with some success.
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Waxx
Major Contributor
It surely is the B200 from Visaton with the phase plug. This was a hype long ago in diy circles, but it did not live on for long. The B200 without phase plug is terrible, but with it's actually quiet enjoyable. I don't know why Visaton did not include that since that phase plug is known, it makes the driver a lot better.
And it's true, this driver does not give real deep bass, it need a sub for that. Xmax is also quiet limited.
And it's true, this driver does not give real deep bass, it need a sub for that. Xmax is also quiet limited.
No surprise the hype did not last long. No deep bass and limited excursion while calling for a huge enclosure, necessity to add DIY phaseplug, and pretty funny directivity from 4K upwards, judging from the polar plots.
Am i the only one not getting the point of this speaker concept?
Waxx
Major Contributor
These drivers were mostly used in an open baffle, with an Emminence Alpha15A woofer below it. It's like the classic OB setup of the turn of the century in diyland. And it's something that works quiet well actually. It's not clean neutral and so, but it sounds good to the ears and was not expensive or dificult to build.
- Thread Starter
- #10
If you listen the recording, it has nice bass that goes down to 50hz. Is it due to passive equalizer shown by @voodooless or a hidden subwoofer?
The volume of the enclosure I guess is 15 liters. This gives a resonance of 110hz with Qts of nearly 2.
The volume of the enclosure I guess is 15 liters. This gives a resonance of 110hz with Qts of nearly 2.
Waxx
Major Contributor
it's probally aperiodic ported, with holes on the back reducing the peak and making it go a bit lower. This is a trick that works, but is hard to simulate and not precise or high fidelity at all. But that trick is often used to make high qts drivers work in small enclosure without one note bass.
No, it's 20 liters closed. The rest is done by the high-pass cap.
This is the simulation of the crossover. The -6 dB at 65Hz checks out, there and about. Room gain will add a bit to that, so those 50Hz will be possible without a sub.
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