The big box units were discontinued for a few reasons.
At the time of their discontinuation, the compact had eaten into a lot of the demand for the large-format units, what was already low volume became even lower volume. The company was also in the process of moving location, and we had totally new projects on the boil (RevivalDRIVE / Amp Recreation R&D).
An overlooked aspect, and one that is politely alluded to in the discontinuation notice is manufacturing methods, time, and sourcing. The Compact pedals weren't manufactured in the same way as the Large-Format pedals; a decision made directly as a result of the experience and lessons learnt trying to manufacture the Large-Format pedals.
Both are/were produced in the UK (as with all our current line-up), but they used totally different supply chains and sources for their components and materials.
To expand specifically on the "increasingly hard to find high-quality materials for". The electronic components themselves aren't the materials being alluded to here (though, the transformers are £80 components, and that's before you've put them in anything, accounted for failures/warranties and everything), it's the metalwork and PCB population processes. The enclosures for the large-format models used aluminium and a screen printed design, with the aluminium enclosure produced by one company, then them being sent to a different company to do the screen print. Getting these enclosures made to a consistently high-standard, got harder and significantly more expensive batch-to-batch. The Compacts used a whole new supply chain, and we moved to an enclosure and panel design. That allowed the enclosure to be universal with only the panel printed, so we no longer need to shift stock between multiple outside companies to finish an enclosure. PCB population at such low volumes also proved challanging to manage and sustain.
The Compact vs Large-Format manufacturing is full of little moments like this, that ultimately made the Large-Format pedals a unwieldy beast to maintain. The Compacts, and now 'Cali76 Bass Compressor' and 'Cali76 FET Compressor' are in no way using worse, lower-quality electronic components, nor do they sound worse, just a little different. They're still made in the UK, they still go through multiple QC stages, every unit still gets hand-tested and listened to, they still cost a bomb on the BOM, they're just more manufacturable and arguably, even higher-quality than before because we're able to more closely focus on consistency and some of the weirdness of the large-format models have been fixed.
TL;DR - Maintaining two vastly different production methods and manufacturing chains, as a really small business, when one line produces expensive but really low-volume items, just isn't all that viable. Especially when you're trying to care a lot about the quality of the output.
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Ultimately we're still a small business, and the Large-Format pedals still pose a lot of issues for manufacturing in their original form. We did a reissue back in 2019/2020, and haven't done so since.
We would love to revisit the pedal, but if we do, we'd be keen to create something that can be produced consistently, so that those who want one, can get one. Obviously, it wouldn't be cheap to manufacture (the Transformer is £80 to us alone!), so it wouldn't be cheap at retail. Given it's been so long, I imagine we'd also want it to be more than just 'oh, it's the one with the transformer again', so we'd probably want to expand the feature set and fix some of the design issues the original large-format models have. All of which, naturally requires R&D time and resources to be available for such a project.
Anyway, maybe this was insightful in some way.
All the best, Jacob.