Bose 901 Active Equalizer
An active equalizer required for the Bose 901 Direct/Reflecting speaker system to achieve its intended frequency response.
Overview
The Bose 901 Active Equalizer is an essential component designed by Bose Corporation for use with the Bose 901 Direct/Reflecting speaker system, introduced in 1968. The speaker system requires active equalization to function as intended, and the equalizer applies substantial boost below 100 Hz and above 3000 Hz to match the speakers' unique power response. Without the equalizer, the speakers do not perform according to design.
This unit is specifically engineered for compatibility with the Bose 901 Series II, Series V, and Series VI Direct/Reflecting speaker systems, forming a tightly integrated part of Bose’s proprietary audio solution that remained in production for over 50 years.
Design
The Bose 901 Active Equalizer is a complex electronic instrument that applies significant frequency correction to the audio signal. It boosts output below 100 Hz and above 3000 Hz, compensating for the acoustic characteristics of the 901 speaker system to deliver a balanced, spatial soundfield as designed by Bose.
Context
The Bose 901 Direct/Reflecting speaker system was introduced in 1968 and remained in production for over 50 years. The 901 Active Equalizer is a required part of this system and was not intended for standalone use or with other speakers. When properly set up, the combination produces an enveloping, three-dimensional soundfield that fills the room, creating a listening experience unlike conventional speaker setups.
eBay Listings
As an eBay Partner, we earn from qualifying purchases. This helps support our independent vintage technology research.
Related Models
- Bose 4.2-SERIES-I (1984)
- Bose 601 (1977)
- Bose 901 EQ
- Bose 201-SERIES III (1981)
- Bose 501-SERIES-II (1975)
- Akai AM-2850 (1975)
- Akai AP-206 (1975)
- Nakamichi BX-1 (1985)
- Acoustic Research research-ar-17 (1978)
- Acoustic Research AR-19 (1994)