N1550-A XO (not a typo)

[magnarc]

Vintage Altec Lansing N-1550-A Dividing Network AS IS | eBay

Not seen one of these. Was it for the 604E and just a variant on the N1500-A?

Its marked an N-1550-A, just for the search engine.

[bowtie427ss]

Not seen one of these. Was it for the 604E and just a variant on the N1500-A?

Or, 605B and N1600.

[Altec Best]

Yup it looks like a 604E duplex crossover.Maybe they experimented with different XO points for the 604E Super Duplex. Probably not to many of those I would suspect.

[jmarkwart]

The N1550-A was used on the Altec 615A Duplex, which was a variation of the 605B. It appears to be a series type crossover similar to the ones used on the 604E and 605B.

[magnarc]

Thankyou for that interesting fact.

[Altec Best]

The N1550-A was used on the Altec 615A Duplex, which was a variation of the 605B. It appears to be a series type crossover similar to the ones used on the 604E and 605B.

I thought they used a N1600D Hz crossover.Could they have used both ? Maybe a tweak during production ?

[bowtie427ss]

The 615A has the conical horn in the center I think.

............ with a funky looking little phase plug in the horn throat.

[Altec Best]

You must have quoted while I was editing !

[bowtie427ss]

You must have quoted while I was editing !

Indeed!

FWIW, and the sake of discussion , the successor 616-8A was built on the 411 frame, uses the 411 motor and cone with an accordian surround.

[Altec Best]

Yup Jeff you were right on here is an auction of a 615 with the 1550B -Crossover

http://www.ebay.com/itm/PAIR-2-VINTA...item33700cf559