EM38A/EM38A-R/EM38A-X QuikWave Audio Player / Message Announcer

Sound File Support

MP3 (320Kbps max.)

No. of Trigger Inputs


Max. No. of Files

8 ~ 999 (mode dependent)

Max. Output Power

15W x 2 (stereo), 55W (mono)

Memory Type

SD/SDHC (2GB/32GB max.)

Supply Voltage

12 ~ 30 VDC

Serial Port


Internal Relay


Download Userís Manual

EM38A is a rugged industrial MP3 player designed for the most demanding jobs. Much like a CD player playing sound tracks from a CD, EM38A plays sound files from an SD/SDHC memory card but without the moving parts to wear and tear. The unit conforms to the ISO 11172-3 MP3 standard (up to 320 Kbps) and provides better sound quality than other MP3 players supporting 256 kbps or less.

Audio programming for the unit is as simple as copying sound files to the memory card via a card reader attached to the computer. The type of memory cards used, the SD/SDHC cards, are most popular and readily available in a number of capacities to suit different needs. Hundreds of tracks totaling hours of audio can be stored onto an inexpensive card for instant playback.

Powered by a single voltage DC power supply, EM38A features a built-in energy saving class D power amplifier with minimum heat dissipation. A line level output is also available for feeding an external amplifier if desired. Audio playback can be triggered with a variety of methods such as push buttons, motion/alarm sensors and PLCs. Keypads and other custom interfaces are available by special request.

EM38A can be configured to work in different operation modes such as:

-  Start the playback when the trigger is applied or removed.
-  Allow the playback to be interruptible by another trigger or not.
-  Play the sound just once or loop it till the trigger is removed.
-  Toggle the internal relays in sync with the audio (for EM38A-R and EM38A-X only).
-  Start/pause/resume/stop the sound via the serial port.

Housed in a compact yet rugged metal case, EM38A can be easily secured into place with the integrated mounting tabs on each side of the unit. Wiring is done via screw terminals and requires only a small screw driver. The screw terminals are unpluggable, making it fool-proof to replace the unit in the field when necessary.

Optional Accessories

Automatic Time-Triggered Audio Playback
Automatic time-triggered audio playback is possible by controlling the player with an optional TMR-08 Weekly Event Timer. Each weekday may have a different program of events.

Remote File Management
When equipped with the QuikWave Remote File Management Kit the sound files can be remotely managed via wired or wireless network using a Windows application.

Audio Amplifier Module
When the player cannot be placed near the speakers, it may be better to drive an amplifier module installed near the speakers instead of running long speaker wires.

Demo Audio for Typical Applications

Product Advertising: Arctic Splash, Eureka, iNav, Dominion, Cookright, Lazyboy
Audio Tour Guide: Hollywood, Taipei 101, Zoo
Transportation: Train, Platform
Elevator: Announcements
Parking Garage: Need Assistance
Warning/Safety: Warning, Crosswalk
Industrial Equipement: Purge Activated
Vending Machine: Zolta
Museum Audio: Water Share

Available Models

EM38A: Audio output only, no relay.
EM38A-R: Audio output + 8 mechanical relays programmed to toggle before/after the audio playback.
EM38A-X: Audio output + 8 mechanical relays programmed to toggle before/during/after the audio playback.

Note: A free Windows utility program called QSAplay must be used to embed timing cues into sound files for the EM38AX. This program is compatible with Windows 8 and below, but not Windows 10.


EM38A Front View

EM38A-R/EM38A-X Rear View

Amplifier Module