Altec N-1600A

A rare 2-way dividing network that still gets attention - and top dollar - on the vintage market

Overview

The Altec N-1600A Dividing Network Crossover is a passive crossover from the golden era of American sound reinforcement. It goes with one of the most legendary speaker systems ever built. It's marketed as a "classic piece of audio equipment," and it turns up in today's collector market tied directly to the Altec 604C Duplex coaxial loudspeaker system. Owners report it was engineered for a 15" coaxial woofer paired with a multi-cellular horn tweeter, forming a complete 2-way system where precise frequency division was critical to preserving the 604C's renowned sonic character. The exact internal architecture remains undocumented in available sources. The unit is consistently identified as a 2-way dividing network, built to handle an 8-ohm load. Collectors note its presence in high-profile installations, including Abbey Road Studios, where documentation confirms the N-1600A was used with modified 604 systems during the 1950s. That lineage, real or perceived, has cemented its status.

Technical documentation is scarce. The N-1600A carries no published crossover frequencies, slope rates, or component-level details in any verified source, yet demand remains steady. Its value is often bundled with complete speaker systems, so standalone pricing is hard to pin down. Recent listings vary widely: individual units appear for as little as $250, while full 604C systems with original N-1600A crossovers command over $1,300. Some units on the market are flagged as former floor models or store returns, which means possible prior use even when sold as vintage-new-old-stock. There are no detailed service records or known failure modes. Buyers accept that with age comes risk - capacitors may need replacement, contacts may require cleaning.

Specifications

Manufacturer	Altec (Altec Lansing)
Product type	2-WAY DIVIDING NETWORK / CROSSOVER
Power rating	8 ohms
Intended speaker compatibility	Co-axial / Duplex 15" Woofer with multi-cellular horn tweeter and 2-way cross-over, 604 C 604C

Historical Context

The Altec N-1600A appears in documentation related to the Altec 604C loudspeaker system used at Abbey Road Studios, where it was part of an unmodified setup except for changes made during the 1950s. Beyond this, no detailed production history, release timeline, or design evolution has been documented in available sources. The model is listed in the VTA Brand Index under "Classic Models Reference."

Collectibility & Value

The Altec N-1600A is described as "Vintage Rare" and has appeared as "Sold out" on specialty retailers like Retro Gear Shop, indicating strong demand. Individual units have been listed at $250.00, while complete systems including the N-1600A, such as the Altec Duplex 604C with crossovers, are priced from $1,422 (tax included). One eBay listing notes that the item may be a floor model or store return, so not all units on the market are strictly unused. No specific maintenance issues or common failures are documented for the N-1600A, though general caution about aging passive components in vintage gear applies.

eBay Listings

Altec N-1600A vintage audio equipment - eBay listing photo 1

1956 ALTEC 604C SPEAKER And N-1600A CROSSOVER Original Cone

$1,200

Altec N-1600A vintage audio equipment - eBay listing photo 2

Single ALTEC Duplex 604C Speakers With Altec N-1600A Crossov

$1,300

See all Altec N-1600A on eBay

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