For Fall 2021 we have upgraded the Hypersleep to Version 2, with new BBD signal filtering plus a few improvements to the power supply and bypass switching. If you own a Hypersleep V1, we can upgrade the BBD filters to the V2 spec. This will not make your unit identical to Version 2, but it will confer an overall brighter sound which makes the reverberation more present. For more information about the differences, see the Blog.

This modification requires sending your unit to our Boston, MA shop for rework. The cost is $60 plus return shipping. Customers are responsible for shipping to us. After placing an order, we will contact you within 1-2 business days to schedule the upgrade. Once your unit is sent to us we will provide a timeline for rework and return shipping.

Please note this modification is not reversible and we cannot refund you once the process is underway. You must be absolutely sure that you wish to proceed.