The past few days have been busy in our workshop. We’ve completed several transformer designs, with a particular focus on bringing full-size transformer character into the space available inside an API 500 module. Our version of the API 2503 is now complete in the EI57 format. This well-known bifilar output transformer is the next design we plan to adapt for API 500, with a target width of 36.5 mm. The challenge is to make it fit while preserving the performance that made us

Over the past few days, we have completed the mechanical design of our 1176 input and output transformers for API 500-series modules. Our 5002-A output transformer is already available as a compact version of our 5002 design for 1176 Rev A–E builds. We have now adapted the input transformer for horizontal PCB mounting as well. Its two rows of five pins, with 2.54 mm pitch, allow the transformer to lie flat on the board and fit within the 36 mm width of an API 500 slot. Togeth

Our EI57 transformers will soon be available in a compact API 500 Series format, designed to fit within the 38 mm width of a standard single-slot 500 Series module. The necessary components have already been ordered, and production will begin shortly. Our goal is to offer every transformer currently available in our standard enclosure in this new compact format as well. As shown in the drawing, M3 female threads are integrated into the lamination clamping screws on the unders

For everyone designing PCBs, enclosures or complete audio projects around our transformers, we’ve now added downloadable 3D CAD models to our webshop. You can download the models before purchasing a transformer, so you can integrate the exact dimensions directly into your own design and check mechanical fit in advance. Available formats include: STEP · OBJ · DXF (Input Transformers) You can also inspect the transformers directly in our interactive 3D Viewer:

Artur Kowalski from 2Yeez Recording Studio recently purchased our 1176 Transformer Upgrade Set and installed it in his own unit. Shortly afterwards, he shared these photos and his impressions with us: “The sound is incredible – the depth and 3D space are the first things I noticed. They truly do an amazing job. On top of that, they look absolutely badass inside the unit. Pure art!” “Your transformers are true masterpieces and they completely transformed the unit!” Artur is cu

ANVIL was conceived as an uncompromising analog stereo device for shaping the character of sound. Its purpose is not to imitate one particular classic unit, but to bring together fundamentally different schools of analog design within a single system—from raw vintage coloration to exceptionally clean and precise high-end sound. Instead of relying on one predetermined signal path, ANVIL allows different input transformers, operational amplifiers, and output transformers to be

The M600 has been visually refined into the M600 SE, while the internal design and sonic character remain unchanged. The M600 SE offers the same deep low-frequency extension, smooth top end and natural, open midrange as the original M600. Review: Mark Wilder Multi-Grammy Award-Winning Mastering Engineer Mark Wilder, former Senior Mastering Engineer at Sony Music, shared his impressions after his first session with our transformers: “After leaving Sony Music, where I had acces