4 inch (100mm) Loudspeaker

This loudspeaker is especially well suited for use in R/C Models, especially R/C airplanes and helicopters due to its very high sensitivity. It has been carefully chosen for the best balance between sensitivity, power handling, weight and frequency response.

What's New:

November 29, 2018

New Sikorsky CH-53E heavy lift helicopter sound set now available bringing our total helicopter sounds to 38!

November 28, 2018

New Sukhoi Su-57 (PAK T-50) airplane jet sound set now available bringing our total airplane sounds to 107!

November 19, 2019

New F22 Raptor jet airplane sound set now available bringing our total airplane sounds to 106!

November 09, 2018

P39 Airacobra sound set now available bringing our total aircraft sounds to 105!

July 03, 2018

The wordmark ShockWave is now an officially registered Trade Mark, registered with the United States Patent and Trademark Office.

4 inch (100mm) Loudspeaker



Frequency Response

Name : 4 inch 20 Watt loudspeaker - 4 Ohm or 8 Ohm

Item Number : LS4IN-20W-8 or 4Ohm
Size : 102mm x 102mm x 36mm (4" x 4" x 1.4")
Weight: 162 grams (5.7oz)
Frequency Response : 150-13000 Hz
Sensitivity : 90dB/1W/1m


Canadian and US Customers ONLY
can use the Add To Cart Button.
For all other countries please email us at contactus@modelsoundsinc.com for a shipping quote.

4 Ohm Version
8 Ohm Version

Highly recommended for model airplanes and helicopters -
90dB/1W/1m Sensitivity, light weight - 162 grams (5.7oz)

This German engineered loudspeaker sounds terrific, yet is shallow and weighs only 162grams. This fine loudspeaker can handle 20 Watts continuous, 30 Watts peak.

The 8 Ohm version is suitable for our ShockWave 2 sound module on supply voltages up to 18 Volts. It can also be used with the ShockWave 2 module on its maximum supply voltage if you turn the volume control on the module down to 3/4 to limit the maximum power output. The 4 Ohm version can be used with our ShockWave 2 sound module with no more than a 4S LiPo battery. battery. The 4 Ohm version will give double the output power of the 8 Ohm version at this voltage.

Our loudspeakers can be ordered by new customers only at the same time as ordering a sound module from us, or by existing customers later who have already purchased a sound module from us.

If you wish to use the ShockWave 2 module on its maximum supply voltage AND you wish to get maximum volume out of it, then two of these 4 Ohm speakers wired in series should be used to get a net 8 Ohm impedance and a 40 Watts power handling capacity - See Wiring Loudspeakers .

When two of these speakers are used in series, the output level from our ShockWave 2 sound module (on 26Volts) can be around 107dB. This was measured with the speakers in open air. When housed in a small enclosure, the sound level will be even higher.