Altec Lansing N801-8A (1970)

A passive LC crossover network designed for 2-way systems, released in 1970 and optimized for use with Altec 811B horns.

Overview

The Altec Lansing N801-8A is a passive crossover network introduced in 1970 for professional audio applications. It is designed for 2-way speaker systems and uses an LC-type circuit to split the audio signal at 800Hz with a 12dB/octave slope. Built to integrate with Altec 811B horns, it features a front-panel attenuator adjustable from 1 dB to 10 dB for precise high-frequency level control. With an 8 Ω input impedance and 100W power handling, it was used in systems such as the A7-8, supporting Altec’s modular approach to speaker design.

Specifications

Production years	Released in 1970
Type	LC type for 2-way
Allowable input	100W
Input impedance	8 Ω
Attenuator	1 dB to 10 dB
Crossover frequency	800Hz
Attenuation	12dB/oct
External dimensions	Width 122 x Height 140 x Depth 143 mm
Weight	1.6kg
Original price (1970)	¥ 39,900 (1 unit)
Original price (around 1976)	¥ 33,700 (1 unit)

Design

The N801-8A uses an LC-type circuit for 2-way crossover operation and is specifically designed for use with Altec 811B horns. The front panel includes an attenuator capable of adjusting signal levels from 1 dB to 10 dB, allowing fine-tuned control over the high-frequency output.

Context

This network was used in Altec speaker systems such as the A7-8, supporting the company’s modular approach to professional sound reinforcement and studio monitoring setups.