Description
The SoundTraxx 885609 Blunami BLU-21PNEM8 combines full Tsunami2 EMD diesel sound with built-in Bluetooth wireless control — run your locomotive straight from a smartphone or tablet with the free Blunami app, no command station required. It is also a complete NMRA-compliant DCC sound decoder, so the same locomotive runs normally on any DCC layout or club railroad.
The EMD sound library covers the classic 567, 645, and 710-series prime movers with authentic horns, bells, and dynamic brakes, driven by Tsunami2's 16-bit audio and Hyperdrive2 motor control. The 21-pin (21PNEM) connector plugs directly into locomotives with a 21-pin decoder socket — no soldering.
Compatibility
- Plugs into locomotives with a 21-pin (NEM660-style) decoder socket
- Controls via Bluetooth from the Blunami app (iOS/Android) or any NMRA DCC system; DC operation supported
- Ideal for EMD diesels — GP, SD, F-units, and switchers
How to Use
- Remove the dummy board and plug the decoder onto the 21-pin socket
- Connect a speaker (if not factory-fitted) and test on the bench
- Pair with the Blunami app for wireless control, or run under DCC as usual
Specifications
- Type: Bluetooth + DCC sound and motor decoder
- Connector: 21-pin (21PNEM)
- Sound Set: EMD diesel (selectable prime movers, horns, bells)
- Motor Control: Hyperdrive2
- Brand: SoundTraxx
- Item Number: 885609
About SoundTraxx: SoundTraxx (Durango, Colorado) pioneered onboard model railroad sound and manufactures the Tsunami2, Econami, and Blunami decoder lines.

