N1550-A XO (not a typo)

[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.