Is the Bose 901 Series I or Series II equalizer interchangeable?
David Jones
Published May 08, 2026
Is the Bose 901 Series I or Series II equalizer interchangeable?
The Bose 901 Series I and Series II equalizers are interchangeable as they both produce the same frequency response curves, but if you really can’t come up with one, it is possible to use two equalizers daisy-chained together. You’d have a range of +/- 24 dB in each band which would cover the full range of the 901 Active Equalizer.
What’s the range of the 901 active equalizer?
You’d have a range of +/- 24 dB in each band which would cover the full range of the 901 Active Equalizer. On the extremes, you’d have both equalizers gained up; in the middle, you’d only have the first gained up slightly and the second left flat.
Where does the sound come from on a Bose 901?
There’s no crossovers or other passive components inside – just a bunch of individual speakers wired together to give the right impedance. About 11% of the sound is radiated from the single front-mounted speaker, and the remaining 89% of the sound is radiated from the back.
Where does the Bose eq901b-i / II install?
The EQ901B-I/II features dual equalization curves, normal and enhanced, which will accommodate your Series I/II depending on personal preference. The EQ901B-I/II installs in your tape monitor loop, pre-out/pre-in loop, or between your preamp and power amp.
What kind of equalizer does a Bose 901 use?
Items in search results BOSE 901 Series V Active Loudspeaker Equalizer TESTED AND WORKING C $238.63 Bose 901 Series IV Active Equalizer C $238.61 BOSE 901 SERIES VI ACTIVE EQUALIZER EQ WORKING FAST FREE SHIPPING NICE COND C $265.14 Bose 901 Series VI Active Equalizer nice condition OK for V Green Light version!
When did Bose start making home audio equalizers?
Bose offers audio equipment like headphones, sound speakers, and home entertainment equipment. They also offer home audio equalizers for their speakers. The company was started by Amar Bose in 1964. What EQs are recommended for Bose 901 series? It depends on the generation.
How big are the drivers on the Bose 901 Series V?
Given the Series VI is the last production model and that the Series V and IV (apparently) only differ in cosmetic fashion, I was happy to have the “latest” 901 version to test. This version consists of a single “full range” 4.5 inch driver up front and 8… yes, 8… 4.5 full range drivers in the back.
The EQ901B-I/II features dual equalization curves, normal and enhanced, which will accommodate your Series I/II depending on personal preference. The EQ901B-I/II installs in your tape monitor loop, pre-out/pre-in loop, or between your preamp and power amp.