I’m looking to install a sound decoder some old Atlas GP 7’s i have. I’m wanting to have the full, rich sound I hear on some models, not the tinny sounds. What set up would you recommend for this? Also, is there a site that shows the installation of the devices? This would be my first attempt at adding sound to an engine.
The owner, JT Burke, is a recording engineer and designs and 3D prints his own baffles for the speakers he sells. They are terrific! I have two speakers wired in-parallel in a brass 2-6-6-2 Mallet and the chuff is wonderfully gutteral - even at low volume.
I’ve had great luck with Digitrax decoders, both non-sound and recently sound.
Most of my motive fleet does not have sound but recently I’ve been installing sound decoders.
The Digitrax SDXH167D Series 7 Sound Decoders come pre-wired with a speaker and a capacitor for the sound- -this is NOT an Energy Storage Unit; AKA: “Keep-Alive” device for the motor.
The great thing about these decoders is that they plug into the Digitrax 9-pin wiring harness.
The only other sound-equipped locomotive I have is a Märklin Class G 2000 BB Vossloh with factory-installed sound that I converted to a 2-rail DCC unit…
The sound fidelity of the SDXH167D speaker is comparable to the Märklin to my ears.
If you do decide to upgrade the speaker to a Scale Sound Systems it’s a simple matter of soldering the two speaker wires from the 10-pin side of the SDXH167D decoder to the new speaker.
The SDXH167D comes preloaded with 8 sound files; 6 diesel and 2 steam.
Other sound files can be loaded with a PC (no Mac version is available).
The easiest way to get quality sound out of an Early Atlas is to remove that plastic board thing and install a pwb decoder like Econami ECO-PNP (2 amp). You need to replace the board lights so cut off the light pipes and install LEDs. Install a high efficiency speaker with enclosure in the cab area. The shell has solid fans so point the speaker down if you can.