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RE: Using the same amp on an 'X.6' and an 'X.7'?

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In Reply to: RE: Using the same amp on an 'X.6' and an 'X.7'? posted by andyr on May 31, 2020 at 02:56:07

Andy,
You can't infer/conclude that a parallel crossover is more demanding upon an amplifier than a series crossover....or vice-versa. Generally speaking. There are too many other variables at play here.
Simple example: In the case of these Magnepan X.7 speakers, the series crossover resulted in a somewhat flatter impedance curve in the crossover range. However, the 1.7 has a dip in impedance at higher frequencies the 1.6 doesn't have.
Dave.

Edits: 05/31/20

Follow Ups:

RE: Thanks, Dave ... - andyr 16:57:43 05/31/20 (4)
It certainly seemed to me that the guy was pulling a long bow when he said a series XO is an easier load to drive than the equivalent parallel XO ... but I wanted to get other people's input.

Thanks,
Andy
- RE: Thanks, Dave ... - Roger Gustavsson 07:30:43 06/01/20 (3)
  Serial vs, parallel: https://sound-au.com/parallel-series.htm
  
  In the case of the 1.6 vs. 1.7, there is a different concept with the super tweeter. You need to compare speakers were the only difference is just if there is a serail or parallel crossover set for the same frequency response - not two differently tuned/voiced speakers.
  - RE: Sure, Roger ... - andyr 14:13:02 06/01/20 (2)
    That would be the ultimate test!
    
    The 1.7's super-tweeter idea means it is not the same as a 1.6. But maybe a 3.7 is pretty much the equivalent of a 3.6 (apart from the quasi-ribbon foil) - so that's a better comparison?
    
    I'm simply interested in determining whether the claim I read that the same amp into a series XO ran cooler than when it was driving a parallel XO ... is correct. Dave suggests not. :-))
    
    Andy
    - RE: Sure, Roger ... - Roger Gustavsson 08:11:03 06/02/20 (1)
      Magnepan 3.6 and 3.7 are voiced with their crossovers. If you switch the crossovers between them they will still sound a bit different. If you want to know what a series and parallel crossover sounds like, you need to build two versions for them.
      - RE: Sure, Roger ... - andyr 17:35:48 06/03/20 (0)
        
        In Reply to: RE: Sure, Roger ... posted by Roger Gustavsson on June 02, 2020 at 08:11:03
        
        Actually, I'm not particularly (interested in what a series crossover sounds like, compared to a parallel XO) - all I wanted to do was get people's opinions as to whether the claim that I had read elsewhere, that a series XO was an easier load on an amp than a parallel XO, was valid ... or not. :-))
        
        And I thought that comparing 1.6s to 1.7s / 3.6s to 3.7s might be a good test. Obviously that was a wrong assumption.
        
        Andy

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