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Our Amp-50 is the final product in our SD line and easily the most straightforward: it’s an amplifier! Despite it’s simplicity, the Amp-50 is a pretty impressive tool to have around. It’s a 50 watt Class D amp — equivalent to a 250 watt linear amplifier.
Anywhere you need a strong solid state amplifier, the Amp-50 has your back- it can be used in Store-Casting, conference rooms, home theaters, car audio, museum, safety, haunt, industrial or entertainment applications. It can serve all these purposes without even getting warm.

The Details
The Amp-50 Class-D amplifier efficiency is nearly 90%. If you feed fifty Watts of 24 vdc into an Amp-50, you will get nearly fifty Watts into your eight ohm speakers. The supply current into a Class-D amplifier modulates to follow the sound exactly. If the sound is quiet, the supply current drops almost to zero. At full volume, it draws about two amps of 24 vdc, which is about equal to the 50 Watt rating of the amplifier (power = voltage x current).
Typical ‘Linear’ amplifiers have only about 20% efficiency. Fully 80% of the power you put into them goes into the heatsink as waste heat. A fifty Watt linear amplifier only feeds about ten Watts of power into your speakers, and forty Watts into the heatsink, whether or not there is any sound being fed through the amp!
Amp-50 Features:
- An amazing fifty Watt Class-D stereo amplifier packs the power of a 200 Watt linear amp!
- Low 0.1% THD+N distortion.
- Integral Current Limit and Thermal Protection. Amp turns back on a moment after the fault is removed.
- Works with most four to eight ohm speakers.
- The amplifier can be bridged for a single fifty watt mono output into a four ohm speaker load.
- Two RCA line level inputs for feeding in external line level audio signals.
- Runs on any voltage from 12 to 24 vdc. Use a 60 Watt power supply (24 vdc at 2.5 amps) for maximum output. Universal input (90- to 24 vac input) power supplies are available from Gilderfluke & Company.
- Low current draw makes the Amp-50 ideal for batteries or solar cells where line power is unavailable.
- If running at high SPLs, use speakers that are rated for at least 100 Watts of continuous power.
- As with any amplifier, speakers can be connected series/parallel to drive more speakers.
- Sturdy aluminum enclosure. Mounts in 2-3/4″ Snap Track, DIN rail (with adapters) or just screw it down.
Here’s a quick review of our whole SD line from InfoComm a few years back!
Interested in buying the Amp-50 for a show? How bout the Sd-50/40 for some crazy parades or stage shows? Maybe even just for around the house? Check out our website https://www.gilderfluke.com/ !! Have any specific questions? Want the sweet surrender of speaking to another human about excellent hardware? Call us! 1-800-776-5972 or 818-840-9484
Check out our post next week as we jump into our theme for February– our MiniBricks!