The SD-25 with DMX is a complete stereo audio playback system. It can be used in a variety of features including Store-Casting, Music-On-Hold, Museums, Safety, Haunt, Industrial or Entertainment applications. Anywhere you need a solid state, high quality audio system that will play for years.
Basic Breakdown
- DMX-512 input can be used to select and play 255 SoundFiles using just one DMX-512 channel. Using two addresses, you also get live volume control via DMX-512. Two RJ-45 jacks to make networking easy
- RS-232 and IR ports, which were options on the earlier SD-25s, are now standard on the SD-25 w/DMX
- Stand alone stereo playback of standard Mp3 (all data rates) or .WAV audio files (up to 48K/16 bit) stored on standard Secure Digital (SD or SdHC) cards. Up to 255 Files in most modes, 32,737 in some.
- Use an Apple remote to play sounds and adjust volume levels. Use IR-Tx‘s for ride vehicle audio triggers
- An amazing 50 Watt Class-D stereo amplifier packs the power of most 200-250 Watt linear amps! It draws only a fraction of the power of a typical amplifier, and only when it is pumping sound. Works with most 8 ohm speakers. The amplifier can be bridged for
- Two RCA jacks for input or output of line level audio signals. Works with external amps or audio sources.
- All configuration is through externally accessible switches. No PC software or drivers are ever needed.
- LEDs show triggers, DMX-512, heart and SD card activity. Modulation LEDs show audio as it is played.
- Two non-polarized optically isolated triggers. Attaches to PLCs, switches, motion detectors, IR sensors, alarm systems or other controllers. Inputs can be set to ramp audio or to select and play specific sounds round-robin or randomly. StoreCasting and Mus
- Mounts in Snap Track, DIN rail (optional), or just Velcro or screw it down. Mounts nicely in a 4×4 J-Box.
- Optically isolated ‘running’ status output can be used to turn on lights, relays, audio ducking, etc…
- Built in RS-232 serial port can be used to control volume, call up sounds and monitor the SD-25 w/DMX
- Runs on any voltage from 12 to 24 vdc. Draws 2.5 Amps at 24 volts (50 Watts) at max amplifier output
- Low current draw makes the SD-25 w/DMX ideal for batteries or solar cells use where line power is unavailable.
- A ‘Starter Kit’ is available: Includes the necessary accesories (USB flash card reader/writer, power supply, MC-Sd Flash Card, Small Screwdriver and GilderCD with software) to operate the SD-25 w/DMX
Real World Implications
So you have the numbers and stats about the SD-25 with DMX. But what does this all amount to when you’re using it in the real world?
Recently at one of our projects for a local Museum, they required an SD-25 with DMX for an interactive earthquake display. It used a pair of 4′ Cerwin-Vega SenSurround subwoofers, the system used a pseudorandom noise generator with output frequencies between 17-120 Hz to feed 1,600 watt BGW-750 audio amplifiers driving the 8 ohm subwoofers. We hooked them up to the SD-25 with DMX along with a sampled rumble through a pseudrandom noise generator- in order to produce a nice rumble sound to accompany the moving platforms, lights, video and other audio guiding the audience through a simulated earthquake. The two 4′ x 4′ x 30″ subwoofers stacked on top of each other sat in the same spot since they were moved to the museum 22 years ago. When attached to one of the SD-25’s stereo amplifier terminals, it ended up being so loud that the subwoofers began to walk forward from the intensity. As a result, the museum now has a leash to hold them back and stable! We also should mention the sound effect is only on for about 20 seconds per ‘earthquake’, further illustrating just how powerful the SD-25 with DMX is!
Check it out!
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