for the impedance
Is that a subwoofer? (3)
which amplifier? (4)
Is that a subwoofer? (3)
which amplifier? (4)
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for the impedance
Is that a subwoofer? (3)
which amplifier? (4)• ’’Freiheit ist das Recht, anderen zu sagen, was sie nicht hören wollen. ‘‘ George Orwell
• „Niemand ist frei, der nicht über sich selbst Herr ist. ‘‘ Matthias Claudius.
deutsch ohne "sz" ABER mit fehler, tchüss! Jean-Marc. -
The entire Bose system goes away, including subwoofer.
The amplifier is a tube amplifier 4/8 ohm (2 x 12W). She has it in 2 versions.Kommentar
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maque and model of the amp?• ’’Freiheit ist das Recht, anderen zu sagen, was sie nicht hören wollen. ‘‘ George Orwell
• „Niemand ist frei, der nicht über sich selbst Herr ist. ‘‘ Matthias Claudius.
deutsch ohne "sz" ABER mit fehler, tchüss! Jean-Marc.Kommentar
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Both own design and construction.
Both with PCL86 in PushPull + Cathode feedback.
The first with ECC83 baxandall- and the second with LM1036 tone control.Kommentar
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oh bravo !
i like SRPP preamplifier
excellent for a cd-player
http://jmraudio.free.fr/diy/srpp/jean-luc_d.html
https://www.audiophonics.fr/fr/modul...n7-p-6571.html• ’’Freiheit ist das Recht, anderen zu sagen, was sie nicht hören wollen. ‘‘ George Orwell
• „Niemand ist frei, der nicht über sich selbst Herr ist. ‘‘ Matthias Claudius.
deutsch ohne "sz" ABER mit fehler, tchüss! Jean-Marc.Kommentar
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BIG SHELFI with W170S-4
In between, I was able to free up some time to visit my daughter and show the proposals.
She found the Pacto not as good as my previous designs and I personally found it not easy to build, more specifically the bass reflex construction. With my tremor I am more and more limited in finishing small complex constructions.
That is why I have measured what is still possible.
We have come to the conclusion that 2 boxes with a height of 80 to 90 cm (25 cm wide and 35 cm deep), with the lower speaker standing sufficiently high next to her TV furniture.
At first I started with the SHELFI design, but soon the volume of the box became an obstacle. That is why I thought to solve that by placing a partition in the box that drastically reduces the volume internally.
I have tested heights from 90 - 80 and 60 cm. The 60 cm version came out best with a volume of 28 liters.
Still, I was not completely satisfied with the slow rise of the bass frequencies in the AL170. Then I thought of the W ... S series that produced particularly good results for me in the 4 ohm versions.
I built the Alto III (with 2x W170S-4) where the listening results were fantastic.
Another type was with the W200S-4 (+ W100S-8 and G20SC-8) in an H61xB35xD25cm case, also with a beautiful sound, with rich tight basses.
So I have set up a crossover that includes the W170S-4 instead of the AL170.
Result: the bass is much faster at max. level, only the transfer from bass to tweeter was a bit harder to get it right..
The bass reflex tube is the BR15.34 with a length of 12 cm.
Results:Zuletzt geändert von Willy_65; 27.01.2020, 20:13.Kommentar
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SHELFI with W170S-4
I made the same exercise for the "SHELFI", so AL170 replaced by the W170S-4 in combination with bass reflex tube BR15.34.
You can compare the result with item # 47.
Results:Kommentar
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used this crossover• ’’Freiheit ist das Recht, anderen zu sagen, was sie nicht hören wollen. ‘‘ George Orwell
• „Niemand ist frei, der nicht über sich selbst Herr ist. ‘‘ Matthias Claudius.
deutsch ohne "sz" ABER mit fehler, tchüss! Jean-Marc.Kommentar
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Sorry Jama, there is something wrong with your posted image. I can not open it.Zitat von jama Beitrag anzeigenKommentar
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• ’’Freiheit ist das Recht, anderen zu sagen, was sie nicht hören wollen. ‘‘ George Orwell
• „Niemand ist frei, der nicht über sich selbst Herr ist. ‘‘ Matthias Claudius.
deutsch ohne "sz" ABER mit fehler, tchüss! Jean-Marc.Kommentar
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I also think it's better. So in the 90 cm high cabinet (BIG SHELFI), place a partition 46 cm from the top (not 60 cm) so that the same volume is achieved as with the SHELFI.
How can you actually determine the optimum volume for a woofer?Kommentar
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Configuration PORT
@UweG or other specialists
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Can you please solve my problem?
In the configuration for the port must all be given inner dimensions.
Everything is clear, except for the BR-tube itself: is the length of the BR-tube the real (internal) length of the tube or only the length that is internally in the housing, so the real length of the tube minus the thickness of the front panel?
Thanks in advance,
WillyKommentar
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It´s the real internal length of the port / tube (the port just does not know if there is a front baffle, box interior or free air outside its walls).
Gruß KlausKommentar
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Thanks Klaus!
Then I have always made the right interpretation with regard to the BR-tube.
And now I can be sure, no more doubts!
regards
WillyKommentar
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"So many parts," I have often heard and that inspired me to simplify the crossover without losing the good results.
My mistake was that I always removed all the circuits, that I thought they could get out of, together and then tried to optimize the result again.
Now I take out each circuit separately and optimize again in the meantime.
That way I managed to remove R8 + L6 + C10 and R6 + L4 + C9 while maintaining all good results.
I also removed R2 + L3 + C5 but the impedance at 59Hz rises then to 9.6 ohms.
I fear that this will turn out less good, because I suspect that the power output at tube amplifier there is therefore less than half than at 4 to 5 ohms ... Between 100 and 220 Hz, the impedance falls below 4 ohms, namely up to 3,3 ohms and I don't think that's healthy either.
So that LCR stays in it.
As far as I am concerned, this is the end result, I have adjusted the numbering in the diagram and also the print.
In the last image you see the result of the 1700Hz takeover with reverse polarity of the tweeter.Kommentar
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