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Thread: Prefab Nelson Pass L300 Summit Crossovers on eBay

  1. #1
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    Prefab Nelson Pass L300 Summit Crossovers on eBay

    I just happened to stumble across these crossovers on eBay (item no. 152390913172, sold by Partyprosound Audio Services, located in Mesa AZ (480) 217-8325)), $99 each, no affiliation), and I called the company up and spoke with the fellow who designed and had them built.

    He lists these specs:


    • 3 way crossover network system
    • crossover frequencies 1.2khz & 8khz
    • 12db/oct
    • 500 watts RMS / 1000 watts peak
    • to use with 8 ohms drivers
    • built and based on the " modified version of the "JBL L 300 "
    • Metallized Polyester Film capacitors
    • 250 volt heavy duty capacitors
    • orifices built on board for tweeter&mid for L Pad easy installation
    • dimensions 4 3/4" X 6 3/4"


    I wound up buying a pair off him for $185 shipped to CA. I've just gone through them and, sure enough, they follow the Nelson Pass schematic shown here (http://www.firstwatt.com/pdf/art_l300.pdf).

    Pretty cool. I might upgrade them a bit (outboard, upgraded biased caps, Mills resistors and better coils), but I like the idea of plus and play crossovers. I wonder if these "Bugle' caps are any good? I'm trying to convince them to sell the PCBs, unpopulated, for enthusiast use. They are considering it.

    Eric
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  2. #2
    Senior Member srm51555's Avatar
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    Not bad for a completed crossover, Thanks for sharing

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    I thought we wanted to get away from the iron cored inductors?
    When faced with another JBL find, Good mech986 says , JBL Fan mech986 says

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    nice, i was looking for this a year ago...
    Semper Fidelis

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    Thumbs up The Ebay xover

    [QUOTE = Zonker92; 402944] Je viens arrivé de tomber sur ces crossovers sur eBay), 99 $ chacun, sans affiliation), et (article n ° 152390913172, vendu par Partyprosound Audio Services, situé à Mesa AZ (480) 217-8325.) J'ai appelé la compagnie et parlé avec le gars qui a conçu et construit les avaient.

    Il énumère ces spécifications:


    • 3 voies système de réseau de transition
    • fréquences de coupure et 1,2 kHz 8khz
    • 12 dB / oct
    • 500 watts RMS / 1000 watts crête
    • à utiliser avec les pilotes 8 ohms
    • construite et basée sur la "version modifiée du « JBL L 300 »
    • Polyester métallisé condensateurs film
    • 250 Volts condensateurs de service
    • orifices construits à bord pour tweeter et mi L Pad installation facile
    • dimensions 4 3/4" x 6 3/4"


    J'ai fini par acheter une paire de lui pour 185 $ livré à CA. Je viens juste de passer à travers eux, et ils suivent assez sûr le schéma indiqué ici col Nelson ( http://www.firstwatt.com/pdf/art_l300.pdf ).

    Plutôt cool. Je pourrais les mettre à niveau un peu (hors - bord, mis à jour, bouchons biaisés résistances Mills et de meilleures bobines), mais j'aime l'idée de jouer plus et crossovers. Je me demande si ces « Bugle caps » sont bons? J'essaie de les convaincre de vendre les PCB, inhabitées, pour des passionnés. Ils envisagent de le faire.

    Eric [/ QUOTE]

    Hi Do you try this xover stock like that on ebay ? How is tit ?

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    No; they're sitting on a shelf in my garage, awaiting my L300 restoration. Soon, though. And I may upgrade some of the bits.

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    Member Dave Cawley's Avatar
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    Lightbulb

    Quote Originally Posted by mech986 View Post
    I thought we wanted to get away from the iron cored inductors?
    +1 !
    "Any sufficiently advanced technology is indistinguishable from magic." - Arthur C. Clarke

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    Actually, I kind of alluded to that in my first post. Obviously, this was built to a price point and size.

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    Senior Member ivica's Avatar
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    Quote Originally Posted by mech986 View Post
    I thought we wanted to get away from the iron cored inductors?
    Hi mech986,

    Why ?

    regards
    ivica

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    As I understand it, air cores can handle more power without distortion due to saturation. I'm not sure how to calculate or determine whether that's an actual problem for any given crossovers/speaker. I do know that JBL used iron core inductors for their low frequency circuits in many systems, and in general they performed just fine.

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    Quote Originally Posted by Zonker92 View Post
    I just happened to stumble across these crossovers on eBay (item no. 152390913172, sold by Partyprosound Audio Services, located in Mesa AZ (480) 217-8325)), $99 each, no affiliation), and I called the company up and spoke with the fellow who designed and had them built.

    He lists these specs:


    • 3 way crossover network system
    • crossover frequencies 1.2khz & 8khz
    • 12db/oct
    • 500 watts RMS / 1000 watts peak
    • to use with 8 ohms drivers
    • built and based on the " modified version of the "JBL L 300 "
    • Metallized Polyester Film capacitors
    • 250 volt heavy duty capacitors
    • orifices built on board for tweeter&mid for L Pad easy installation
    • dimensions 4 3/4" X 6 3/4"


    I wound up buying a pair off him for $185 shipped to CA. I've just gone through them and, sure enough, they follow the Nelson Pass schematic shown here (http://www.firstwatt.com/pdf/art_l300.pdf).

    Pretty cool. I might upgrade them a bit (outboard, upgraded biased caps, Mills resistors and better coils), but I like the idea of plus and play crossovers. I wonder if these "Bugle' caps are any good? I'm trying to convince them to sell the PCBs, unpopulated, for enthusiast use. They are considering it.

    Eric
    Are they willing to sell the PCB only?

  12. #12
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    Not sure. I suggested it to them several times and I got the impression they were considering it. If you called and bugged them, it might help convince them.

  13. #13
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    Hi,
    Toodalin sugessted me to buy a pair of this xover(nelson pass designed) but I'm just wondering if it will work with 16 ohm system(130a+175+2405).?
    If is not plug&play what shold I need to modify to make it work?
    Please educate me,
    Thanks

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