Altec Lansing MK-5 (c. 1991)

A Japanese-systematized, bass reflex bookshelf speaker developed for studio and stage use, based on the A5 platform.

Overview

The Altec Lansing MK-5 is a 2-way, 2-speaker bass reflex system designed for professional use in studios and halls. Built around 1991, it was developed by ALTEC Sound Development (ASD), a brand established by Elektri to systematize Altec products for the Japanese market. It evolved from the legacy of the Altec A5 system, refined for improved usability without sacrificing performance.

Specifications

System type	2-Way, 2-Speaker, Bass Reflex System, Bookshelf Type
Low frequency unit	38 cm cone type (3156)
High frequency unit	Horn Type (MRII594 + 288-8K)
Network	N-8500-8A
Frequency characteristic	50 Hz to 16 kHz
Impedance	8 Ω
Allowable input	75W
Output sound pressure level	99dB
Crossover frequency	500Hz
External dimensions	Width 640 x Height 900 x Depth 540 mm
Weight	69.5kg

Design

The MK-5 features a bass reflex cabinet engineered according to Thiele & Small theory, using a composite construction of FRP and wood plywood. It was designed to improve upon the Altec A5 system with a more user-friendly form while maintaining professional-grade acoustic performance.

Context

Developed for use as a stage monitor in halls and as a holdback speaker in studios, the MK-5 is part of the MK series from ALTEC Sound Development (ASD), representing a Japanese systematization of classic Altec Lansing audio technology. It reflects a focused effort to adapt proven designs for modern professional environments.

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