Altec Lansing 890C Bolero (1970)

A bookshelf speaker system with passive radiator design, released in 1970.

Overview

The Altec Lansing 890C Bolero is a bookshelf-type speaker system introduced in 1970. It features a 2-way, 2-speaker configuration with a passive radiator for enhanced bass response. This model is a renewal of the 890B, distinguished by design updates including a lattice grill. Built around proven Altec Lansing driver technology, it uses a 25 cm cone woofer and horn tweeter for balanced audio reproduction.

Specifications

Type	2-way, 2-speaker, passive radiator system, bookshelf type
Woofer	25 cm cone type (406-8C)
Tweeter	Horn Type (3000H)
Network	N-3000E
Impedance	8 Ω
Frequency characteristic	40 Hz to 20 kHz
Allowable input	50W
External dimensions	Width 660 x Height 380 x Depth 300 mm

Design

The 890C Bolero uses a phase inverter design, with a 25 cm cone passive radiator named "Phase Inverter" to extend low-frequency performance. The system mounts a 25 cm cone type woofer (406-8C) with free suspension for bass reproduction and a horn type tweeter (3000H) for high frequencies. The crossover network, labeled N-3000E, is integrated into the system. A lattice grill was added as part of the design update from the earlier 890B model.