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History of Brian May's treble boosters and pedalboard used with 'Queen' from 1970 to around 1986 | Fryer Guitars
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File:Fryer Brian May Treble Booster Touring, true bypass & LED mod by Cluster.jpg - Wikimedia Commons
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Brian May Treble Booster Set Greg Fryer Limited Edition Pedal 2008 World Tour - Rare Queen Collector | Reverb
![History of Brian May's treble boosters and pedalboard used with 'Queen' from 1970 to around 1986 | Fryer Guitars History of Brian May's treble boosters and pedalboard used with 'Queen' from 1970 to around 1986 | Fryer Guitars](https://fryerguitars.files.wordpress.com/2019/07/red-special-and-tan-vox-ac30-with-rangemaster-on-top-fryer-ac30s-road-case-in-background.jpg)