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  »  New  All Active! A DSET and multi-way acoustic system...  Hahaha...  Audio Discussions  Forum     14  78221  01-31-2008
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  »  New  Incorporating active crossovers into DSET..  Thanks...  Melquiades Amplifier  Forum     2  29111  07-22-2008
  »  New  About DSET-driven multi-way acoustic system maintenance..  About DSET-driven multi-way acoustic system maintenance...  Horn-Loaded Speakers Forum     0  17416  11-01-2009
  »  New  Multi-amping crossovering...  No input capacitor......  Audio Discussions  Forum     6  40476  09-24-2010
01-21-2009 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 1
Post ID: 9479
Reply to: 9479
If you’re multiamping then use passive-line lever crossovering
fiogf49gjkf0d

 floobydust wrote:

 Integrating multiple amplifier sections and drivers is always a challenge. Doing it with different topologies and OPTs adds some additional complexity due to the difference in response characteristics. Crossover design for each of these adds more complexity and requires more effort to integrate, so I would certainly applaud your efforts here. You certainly have some interesting ideas to pursue on the crossover sections.

 Romy the Cat wrote:
It is trully a new level of game all together. For instance I always was very proud with the level of integration of Macondo drivers.  It is 8 feet tall installation but it performs integration-wise more interesting and more complied then a single-driver and it might do it …from insulting distance of 6.2 feet.

 limono wrote:
I'd be interested if the system really integrates well for nearfiled (6-8ft)

It is kind of funny that for 2 years since the 6-ch Milq circuit was published no one besides ‘floobydust’ commented on the Milq-Macondo crossovering. Any single person who heard it surprised with the way how Macondo is integrated and how it image but not one care to think why it does so.  I would not comment about many of the “whys” but I would like to point out that passive-line lever crossovering is one of the reasons.

http://www.romythecat.com/GetPost.aspx?PostID=5940

What is important to understand is that with such an implementation of crossover the most critical parameter of the Macondo Acxiom – the super accurate time alignment - might be handled very precisely. The line-level crossovers work against fixed impedance and therefore the crossover point and the time alignment does not fluctuate along with reactance of the drivers. That has a huge advantage toward to critical imaging in nearfiled position.

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
01-21-2009 Post does not mapped to Knowledge Tree
drdna
San Francisco, California
Posts 488
Joined on 10-29-2005

Post #: 2
Post ID: 9481
Reply to: 9479
Passive line level crossover advantages
fiogf49gjkf0d
 Romy the Cat wrote:
The line-level crossovers work against fixed impedance and therefore the crossover point and the time alignment does not fluctuate along with reactance of the drivers.
Okay, maybe this is a dumb question, but why would you NOT use passive line level filters if you had a DSET approach? I think when you are building a system that has dedicated speakers and source, the circuit naturally you would want to adjust to the rest of the electronics very precisely?
Adrian
01-21-2009 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 3
Post ID: 9482
Reply to: 9481
Come again.
fiogf49gjkf0d
I am sorry; I do not follow what you are saing. I see no relation between a need to use a crossover with DSET topology.

The Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
01-21-2009 Post does not mapped to Knowledge Tree
drdna
San Francisco, California
Posts 488
Joined on 10-29-2005

Post #: 4
Post ID: 9483
Reply to: 9482
Crossover and DSET?
fiogf49gjkf0d
 Romy the Cat wrote:
I am sorry; I do not follow what you are saing. I see no relation between a need to use a crossover with DSET topology. <BR><BR>The Cat
What I am thinking is that with full range amplifier, you must use a speaker level crossover if you have multiple drivers. With DSET, you do not have this constraint and can then deconstruct the filter to put it in the circuit at a place where it least interacts with the other components. The only reason I can think of for not doing this is that you have to rebuild the filter it every time you change a speaker, etc. (So it is not all purpose.) I am not talking about the need for a crossover, only that the DSET topology allows increased freedom in how any filters are implemented. Hence my question.

Adrian
Page 1 of 1 (4 items) Select Pages: 
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  6 Channel Version of Super Melquiades..  The first Milq screw up....  Melquiades Amplifier  Forum     131  844684  08-08-2007
  »  New  All Active! A DSET and multi-way acoustic system...  Hahaha...  Audio Discussions  Forum     14  78221  01-31-2008
  »  New  The DSET perspective examines the Herb Reichert article..  Are you still in Reutlingen, Germany?...  Melquiades Amplifier  Forum     5  65470  07-01-2009
  »  New  Incorporating active crossovers into DSET..  Thanks...  Melquiades Amplifier  Forum     2  29111  07-22-2008
  »  New  About DSET-driven multi-way acoustic system maintenance..  About DSET-driven multi-way acoustic system maintenance...  Horn-Loaded Speakers Forum     0  17416  11-01-2009
  »  New  Multi-amping crossovering...  No input capacitor......  Audio Discussions  Forum     6  40476  09-24-2010
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