Vintage Bose 901 Series IV Active Equalizer | eBay
Amazon.com: 901 equalizer series v-works with bose speakers series v/vi : Electronics
Bose - New feature — the “Equalizer” setting for #BoseHeadphones 700 in the Bose Music app lets you control the bass, midrange, and treble of whatever you're listening to. How do you
Amazon.com: Bose 901 Series VI Active Equalizer : Electronics