LSi25 needs more power then LSi15 why?

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  • chrisfromalbany
    chrisfromalbany Posts: 41
    edited October 2009
    McLoki wrote: »
    As already stated the difference was max power it can take (sustained, not peak) not what it needs. The volume difference between 250watts and 300watts would be only about 1db or less so that is comparable as well.

    The crossover in both speakers is only a 6db slope, so it actually plays quite a bit of sound above and below the crossover point. I prefer the sound of the 15's over the 25's although I think the 150hz crossover seems high. (I was not on the listening tests when they were deciding it though, so maybe that is what sounded best)

    Supposedly from talking to some Polk engineers - the T/S specs for the Db series 8" sub would work very well in the LSi15. (This was the older style Db series though I don't know if that translates to the new style or not)

    Regarding cabinet size, the 25 is a little taller (that may be mostly in the bass section as you say, I am not sure) but it is also 4" deeper (front to back) and that would be in the top and bottom section of the cabinet.

    I still need to do the crossovers in my 15's, but will probably purchase some 8" DB drivers and try them in there as well. If it does not work out - they will make it over to my cars or be sold to other polkies who want to try it out.

    Michael

    I will be interested in hearing how that works out. Being that the LSi25s are plate amp driven modding the woofers is limited by the plate amp and/or replacing the amp with something else. Seems like to much work and getting the sound right. I took the driver out of the S2 and it must have weight over 10 pounds and it is 5 1/4 driver.
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  • chrisfromalbany
    chrisfromalbany Posts: 41
    edited October 2009
    any one modded the XO on the LSi25 and what was earned on the SQ? I just figure modding the drive is going to make the biggest difference but is hard to do because the XO would need to be modded as well. Then you ask why not get a different speaker.
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  • Bernal
    Bernal Posts: 991
    edited October 2009
    chrisfromalbany wrote: »
    any one modded the XO on the LSi25 and what was earned on the SQ? I just figure modding the drive is going to make the biggest difference but is hard to do because the XO would need to be modded as well. Then you ask why not get a different speaker.
    My preference is LSi15 + Velodyne Optimum 12 (SubWoofer 2400W/1200WRMS).
    LSi15 has an 8 "woofer which complements very well the media.
    The subwoofer the Lsi 25 is good but not enough. Better invest in a good subwoofer and let it do its work.    ;)
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