SoundTraxx 886604 | BLU-4408 Blunami Electric Sound Decoder | Large Scale

The SoundTraxx 886604 is a BLU-4408 Blunami digital sound decoder with the Electric sound set. Blunami is a Tsunami2 with a Bluetooth radio added, so it runs three ways: as a normal DCC decoder on any NMRA-compliant system, on plain DC, or in wireless mode straight from your phone or tablet.

Wireless mode needs no command station and no programming track — an old DC power pack and the free Blunami app are enough, and CVs can be read and changed over Bluetooth while the locomotive is running. The app is free for iOS and Android. This version is the big-scale Blunami: a 4-amp motor rating and screw terminals instead of solder joints, suited to S, O and Large Scale.

• AC traction motor sound with pantograph up/down (interlocked so the loco will not move with the pantograph down), trolley bell, stop-request bell, pneumatic doors and cab chatter
• Bluetooth control from the free Blunami app (iOS and Android) — over 300 settings without editing a single CV by hand
• Dynamic Digital Exhaust (DDE) automatically matches traction motor sound to the load on the motor, and the app calibrates it for you
• Independent and train brakes with adjustable rates
• Hyperdrive2 motor control for smooth, creep-speed switching
• Over 20 Hyperlight lighting effects across 8 function outputs
• 16 polyphonic sound channels on a 32-bit processor, with a 7-band equalizer and adjustable reverb
• CurrentKeeper ready — works with the SoundTraxx 810140 CurrentKeeper

Shop the full SoundTraxx range, compare every DCC decoder we stock, or see the other Electric sound profile decoders. A speaker is not included — browse DCC speakers rated 3 watt or better, and find install parts in DCC wiring. Add a SoundTraxx 810140 CurrentKeeper to keep sound alive over dirty track and turnouts.

Do I need a DCC system to use this?
No. That is the point of Blunami. It runs on a plain DC power pack with no command station at all — you control it from the free Blunami app over Bluetooth. It is also a fully NMRA-compliant DCC decoder if you already run DCC.

Does the app work on Android?
Yes. The free Blunami app is published for both iOS and Android. (Some older listings and dealer pages still say iOS only — that is out of date.)

Is a speaker included?
No. Pair it with an 8-ohm speaker rated 3 watt or better that fits your shell.

Will it fit my locomotive?
This one measures 69 x 30.5 x 14mm and connects by screw terminal blocks (no soldering). Check the space in your shell against that footprint before ordering — other Blunami versions use different connectors and sizes.