Holy Island Audio Glass Palace

The Glass Palace is an analog drive pedal from Holy Island Audio, a maker whose pedals sit in the overdrive and boost territory. RockBoard's PedalPedia describes it as "a glassy low to mid gain drive pedal (hence the name)" and labels its effect type as "OVERDRIVE BOOSTER", so it covers both light overdrive and clean-ish boost duties on a board.¹

What it does

The circuit is built around a preamp the maker has a long attachment to. In the maker's own words: "At the circuit's heart lies one of my favourite preamp circuits of all time, the DOD Bifet Preamp." That preamp pushes and emphasises what sits behind it: two switchable flavors of transistor based fuzz circuits, which RockBoard's PedalPedia describes as lying at the pedal's core.¹

So the signal path runs from a familiar preamp design into a choice of two transistor fuzz voices, switched between on the pedal. That gives the Glass Palace a wider range than its low to mid gain label might suggest, and the maker frames that range in playing terms: it is "suitably at home providing twinkly midwest-emo chime through to awkward and discordant noise rock".¹

For a player, that places it as a low gain drive with a fuzz option on tap, rather than a straight overdrive or a dedicated fuzz pedal. Players comparing it with conventional low gain drives such as those covered in Boss SD-1 vs Ibanez TS9 Tube Screamer should read it as a different kind of circuit: a preamp-driven design with switchable transistor fuzz voices, not a soft-clipping overdrive in that tradition.¹

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