The crossover itself is fine. I suppose there is some noise coming from the power supply, but it is disturbing. Therefore I sell the crossover as a defect.
It shouldn't be difficult for DIY people to get the crossover working properly. And above all to understand the circuitry made by professionals and to use it for their own purposes.
Used parts:
Crossover: ABACUS electronics - Aktuelle Meldungen und neues aus dem Labor
Power supply: Sjöström SSR-03
Case: Modu Galaxy Maggiorato
Connections: 8x Neutrik RCA
Price: 200.- EUR plus postage insured DHL shipping within EU (& GB)
And as always:
Private sale, guarantee and exchange excluded.
It shouldn't be difficult for DIY people to get the crossover working properly. And above all to understand the circuitry made by professionals and to use it for their own purposes.
Used parts:
Crossover: ABACUS electronics - Aktuelle Meldungen und neues aus dem Labor
Power supply: Sjöström SSR-03
Case: Modu Galaxy Maggiorato
Connections: 8x Neutrik RCA
Price: 200.- EUR plus postage insured DHL shipping within EU (& GB)
And as always:
Private sale, guarantee and exchange excluded.
Yes, the zoom of the picture confirms that.
I'd add some ceramics in the supply lines...
Great...I suspect the design is flawed because I see three wires coming from the input RCA and going to each section of the LP/BP/HP.
It should go first to a buffer, then the buffer drives all the three sections of the crossover.
It should go first to a buffer, then the buffer drives all the three sections of the crossover.
Yeah, could be. If that's true, it could also be the source of the background noise.
If I'd asked earlier...
If I'd asked earlier...
last November ups
I would like to have completed the sale this year. At a fair price! Otherwise this active x-over goes into the garbage.
So I am open for reasonable (and not insulting) offers.
Thank you.
I would like to have completed the sale this year. At a fair price! Otherwise this active x-over goes into the garbage.
So I am open for reasonable (and not insulting) offers.
Thank you.
I might be interested... I guess this is from an AOS loudspeaker system, correct?
Can you share some more details (by private message, in German if you like):
- photo of the entire box
- transfer functions of the filters
Can you share some more details (by private message, in German if you like):
- photo of the entire box
- transfer functions of the filters
Mbrennwa, Michael,
Would you be willing to publish the transfer functions of the filter here, once you have obtained those? Even better would be a publication of the circuit.
Really curious to learn whether the Abacus folks have been able to come up with something a bit more sophisticated than standard S&K or MFB type opamp circuits with textbook transfer functions.
Would you be willing to publish the transfer functions of the filter here, once you have obtained those? Even better would be a publication of the circuit.
Really curious to learn whether the Abacus folks have been able to come up with something a bit more sophisticated than standard S&K or MFB type opamp circuits with textbook transfer functions.
The Abacus guys can make filters with any sensible transfer function, as long as it's possible to implement it with analog circuits. Just tell them what you need.