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This topic has 3 voices, contains 4 replies, and was last updated by avatar Scott Albright 427 days ago.

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January 13, 2010 at 10:14 am #2552
avatar
Russell

I thought I would move this subject here from the other place.  I would really like to get some feedback from the Aperion staff on these crossovers.  I am interested in the the difference in the sound with these crossovers.  I also would be interested in it's affect on sensitivity, power handling ability and any other technical stuff you can throw at us.  In addition to that I wonder about the cost, it seems from what I read it would be a fairly inexpensive crossover to implement.

Speaking of crossover components, I remember some time back when we saw a picture of the drivers and crossover of the 6T.  I mentioned in that thread that I saw some very high quality components there, but I also saw some components that looked out of place.  It would be interesting to hear, from the designer, some details of the crossover scheme and parts used.  There is not much new you can do with crossovers that has not been done before so I doubt there is anything proprietary in there but if it is to sensitive that no problem.  Just the curious sort I am. 

 

Cheers 

January 13, 2010 at 12:47 pm #2777
avatar
Jason Hicks

In terms of the Diaural crossovers the reason for us not using them any longer was not due to cost, but because we felt that designing our own crossover gave us far better results than one that was outsourced from a company like Diaural.  As for the specific advantages I'll have to ask Ken about that, but intuitively it makes sense that a crossover specifically designed to work with our drivers would be a better choice for our speakers.

I can also see what he has to say in response to your general questions about crossover technology, but he is a fairly busy guy so please bear with me if it takes a few days for him to reply, thanks! 

January 20, 2010 at 9:30 am #2780
avatar
Jason Hicks

Hey Russ, sorry for the delay but here's what Ken had to say about this topic:

 [quote]

In a nutshell, the DiAural Xovers dumped most of the amp's power
to ground through a huge resistor in order to avoid using a series cap to the
tweet.  Moving away from this ill-advised topology resulted
in:

 

  • Greater efficiency (obviously)

     

  • Freed me up to use the Xover to EQ out freq
    bumps

     

  • That big resistor got so hot if melted down some plastic parts
    like ports.  Also got higher order (steeper) roll off slopes –> power
    handling went way up.

     

  • New Xovers cost a little more — but just a couple of
    bucks
  •  

Nothing proprietary about our Xovers.  Mainly 2nd to 3rd order,
occasional parallel notch filters, EQed to put priority on on-axis response with
concessions to power response, summing in Xover freqs aimed at listener
(usually forward-to-up).  Parts include laminated "I" core coils, polyprop,
mylar, low DF electrolytic caps with better quality caps being used when in
series to HF.
[/quote]
 
Hope that helps but please let me know if you have any other questions! 

 

January 20, 2010 at 10:12 am #2698
avatar
Russell

[quote user="Jason Hicks"]

Hey Russ, sorry for the delay but here's what Ken had to say about this topic:

 [quote]

In a nutshell, the DiAural Xovers dumped most of the amp's power to ground through a huge resistor in order to avoid using a series cap to the tweet.  Moving away from this ill-advised topology resulted in:

 

  • Greater efficiency (obviously)

     

  • Freed me up to use the Xover to EQ out freq bumps

     

  • That big resistor got so hot if melted down some plastic parts like ports.  Also got higher order (steeper) roll off slopes –> power handling went way up.

     

  • New Xovers cost a little more — but just a couple of bucks
  •  

Nothing proprietary about our Xovers.  Mainly 2nd to 3rd order, occasional parallel notch filters, EQed to put priority on on-axis response with concessions to power response, summing in Xover freqs aimed at listener (usually forward-to-up).  Parts include laminated "I" core coils, polyprop, mylar, low DF electrolytic caps with better quality caps being used when in series to HF.
[/quote]
 
Hope that helps but please let me know if you have any other questions! 

 

[/quote]

Thanks Jason, I'm a sucker for that technical stuff!

Cheers 

February 17, 2013 at 2:24 pm #3833
avatar
Scott Albright

I own these, received as a gift as a 5.1 system. I don’t care for them, as they are tough to drive and overly flat, with poor sound stage. I have a pair of similar sized BIC Venturi bookshelf speakers that I bought back in the day based on a Consumer Reports review that kick these Aperion’s right in the teeth. I will say that they are well built cabinets, however, dense and heavy little suckers! I think the Diaural crossover is the failure, and am glad that Aperion went away from these. The highlight of this system was the subwoofer. As for mine (I can’t remember their number, something like 512?), I sent 2 to a guy who is looking into ripping out the crossovers for a more conventional design. Don’t know if it is worth it or not, but the speaker cabinets and tweeter/woofer are of enough quality, that it might be worth the rebuild. Maybe not. We’ll see what he says…

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