Thermionic Culture The Robin
Passive DI box
DI / ReampPrice not published
Specifications
- Type
- DI / Reamp
- Description
- Passive DI box
- Topology
- passive (Sowter transformer, no valves or solid-state active circuitry)
- Signal path
- Analog
- Channels
- 1
- Channel format
- mono
- Form factor
- Single-unit DI box (non-rack)
- Powered
- yes (mains powered)
- Impedance (Ω)
- 10:1 transformer ratio — presents ~100x the connected mic-amp's input impedance to the instrument (e.g. a 1kΩ mic-amp input yields a 100kΩ load)
Details
Controls: Bypass, Earth Lift
I/O: Instrument input; 'Amp' (thru) jack wired directly to the DI jack for an external amp; XLR DI output; Bypass switch removes the transformer from circuit for direct connection to a mic-amp input (works well with the Snow Petrel, which has a relatively high-impedance input); Earth Lift disconnects XLR pin-1 ground to prevent hum loops
Notes: FLAG: the only current product in the Thermionic Culture line that is NOT valve-based — it is a simple passive E.A. Sowter transformer DI box with no active electronics of any kind, so it does not fit the brand-wide 'all-valve/tube, Class-A' topology used elsewhere in this dataset. The product's own web page has no description text (site placeholder, 'no description for this product yet'); all detail here is sourced from a separate 'Robin Spec and Instructions' PDF. Frequency response is stated only qualitatively as 'flat over the audio range' with 'no measurable distortion added.' Country of manufacture not stated in the fetched instruction sheet — left blank. Official site thermionicculture.com is currently unreachable/broken (root returns an empty Apache directory listing, product URLs 404) as of research date 2026-07-19; all data below sourced from Wayback Machine snapshot dated 2025-05-16 (and linked official spec-sheet PDFs) of the live Joomla/VirtueMart catalog, cross-checked against the current Independent Audio (US distributor) product listing, which also shows no USD pricing.