Jul 22, 2018
Is there a replacement 901 series IV equalizer sold by Bose?
Dec 15, 2016
Thank you for writing in. The equalizers are no longer available or sold by Bose.
If you have any other questions, feel free to reach out!
Thank you again,
Mohsin - Community Support
Jul 4, 2017
I use a Deer Creek EQ901B-III/IV for my 901 series 5. My 901s sound great with that equalizer. You can find the EQ. on Ebay.