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visaton fullrange
visaton fullrange
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Old 9th November 2004, 03:43 PM   #1
resident is offline resident
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Default visaton fullrange

Hi
I'm planning to build a pair of no cost effective fullrange speakers for my workbench.
What do you say for the Visaton BG17 or BG20??
Have anyone of you try them?
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Old 15th November 2004, 09:21 PM   #2
resident is offline resident
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Noone?

I'm thinking to give a try.50 euros the pair.But can you help me on designing the cabinet?
I'm not good at this.I don't have any program and no any experience.
How can I now the dimensions of it?Use a closed cabinet or with bass reflex?
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Old 15th November 2004, 09:30 PM   #3
johnnyx is offline johnnyx  United Kingdom
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There is a free program here, WinISD, that will help you design the enclosure from the Visaton parameters.
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Old 20th November 2004, 01:18 AM   #4
Cyburgs is offline Cyburgs  Austria
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Default I have tried the ...

... BG20, but I am not convinced about them. They do play fairly loud, but shout very much and lack heights. I tried them with several different notch filters, but the sound got hardly better. They are designed for industrial use (organs, PA, ...) and don't work out well in HiFi use.
In this price range, the Beyma 8AG/N is the better choice in my opinion. Some guys in Germany even claim High-End qualities for this driver, although it is rather simple and cheap.
Following the advices of some 8AG/N fans I tried them in a reflex enclosure of 45 Liters (51 x 37 x 27 cm). It should be made of rather thin (8mm-10mm) particle board, MDF or multiplex. The reflex channel is just a hole in the front of 10 cm diameter. The backside should be damped.
My prototypes played amazingly well, although all simulations failed. They have a nice vintage style sound, with warm bass and good dynamics. They give very much listening pleasure for the price.

Nice greetings, Berndt

Edit: I corrected the volume of the enclosure.
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Old 20th November 2004, 01:08 PM   #5
resident is offline resident
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Hi Cyburgs,
Thank you for your advice to use Beyma 8AG/N.I'm not very familiar with cheap fullrange speakers.
Which is the price of this speaker?

Why should it be made of thin particle board, MDF or multiplex?
I have heard this before and that it's better to use "live" woods,but why?I know that more thicker-more better.But this for common loudspeakers and not for fullrange.

How you correct the volume of the enclosure?
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Old 20th November 2004, 01:35 PM   #6
Arnold_R is offline Arnold_R  Netherlands
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Default other speaker

at the moment i am experimenting with Fostex FE207 E

I am very pleased with them...

Although the need some corrections.

the price however is very moderate....

and of course being just a single sound source they give instruments recognition as no other multiple speakersystems.

regards
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Old 20th November 2004, 01:50 PM   #7
resident is offline resident
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Hi Arnold R,

The price of visaton BG20 is about 25 euro each.And I found Beyma's with google search,about 30-35euro.I don't want to go more than this.
How much is the cost of the Fostex?
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Old 20th November 2004, 03:50 PM   #8
Cyburgs is offline Cyburgs  Austria
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Default @resident

For normal loudspeakers you are totally right, the thicker, the better.
But in this case the walls of the enclosure have an acoustic function, they work as a kind of passive resonator. With this trick you get bass down to about 50 Hz out of a chassis with a fairly high fs of 100 Hz. This kind of construction was commonly used by old tube radio manufacturers.
This kind of enclosure works best with high-QTS and high-Fs loudspeakers like many vintage fullrangers.

I also know (and like) an "older brother" of the Fostex FE207E, the Fostex FE204. The 20 cm FE types are around 200 Euro/pair and they are really excellent. I have them in a huge horn enclosure (about 200 liters) called Jericho-Horn and they are my current main speakers.

Nice greetings, Berndt
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Old 20th November 2004, 04:02 PM   #9
Arnold_R is offline Arnold_R  Netherlands
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Default Oops

i was thinking about the Visaton B200 which is a full range speaker

and it cost about 130 euro the fostex about 90 euro

but if this to much for you the bg20 seems a good choice

what kind of enclosure are you thinking off
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Old 21st November 2004, 03:18 PM   #10
Hertzschmerz is offline Hertzschmerz  Germany
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Visaton BG 20 is not so bad if used as midwoofer. If you want to use these in fullrange mode Visaton recommends a notch filter
R = 8,2 Ohm
L = 1,0 mH (L depends on baffle width)
C = 6,8 F
plus inductive rise compensation
R = 8,2 Ohm
C = 4,7 F

Even with this FR correction you will only get sufficient treble listening on axis.

Visaton BG 17 isn't worth dealing with, IMHO.
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