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

Not bad for a completed crossover, Thanks for sharing

I thought we wanted to get away from the iron cored inductors?

nice, i was looking for this a year ago...:o:

[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 ?

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

Quote:

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Originally Posted by mech986

I thought we wanted to get away from the iron cored inductors?

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+1 !

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

Quote:

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Originally Posted by mech986

I thought we wanted to get away from the iron cored inductors?

---

Hi mech986,

Why ?

regards
ivica

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.

Quote:

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Originally Posted by Zonker92

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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Are they willing to sell the PCB only?

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.

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