4inch (100mm) Loudspeaker

This loudspeaker is well suited for use in smaller RC Models, especially RC boats, due to its high sensitivity an water resistant cone. It has been carefully chosen for the best balance between sensitivity, power handling, weight and frequency response.

What's New:

November 06, 2021

New Shelley Foss Tugboat sound set added bringing our total boat sound sets to 75.

September 27, 2021

New RNL Tamar Class lifeboat sound set added bringing our total boat sound sets to 74.

September 05, 2021

Many Battleship/Warship sound sets added bringing our total boat sound sets to 73.

May 14, 2021

New Hercules AC130 gunship sound set now available bringing our total airplane sound sets to 120.

February 17, 2021

New Airbus A380 sound set now available bringing our total airplane sound sets to 119.

3.3inch (84mm) Loudspeaker



Frequency Response

Name : 3.3inch 20 Watt loudspeaker - 4 Ohm

Item Number : LS3.3IN-20W-4Ohm
Size : 84mm x 84mm x 29mm (3.3" x 3.3" x 1.14")
Weight: 240 grams (8.5oz)
Frequency Response : 200 5000 Hz
Sensitivity : 89dB/1W/1m


ONLY Canadian and US Customers
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

Highly recommended for model boats due to its smaller size and water resistant cone, it can also be used in airplanes, helicopters and tanks - 89dB/1W/1m Sensitivity, but heavier weight - 240 grams (8.5oz)

This German engineered loudspeaker sounds great, yet is very shallow and weighs 240grams (8.5oz). This fine loudspeaker can handle 20 Watts continuous, 30 Watts peak.

This 4 Ohm loudspeaker is suitable for our ShockWave 2 sound module on nominal supply voltages up to 12 Volts, i.e. no more than a 3S LiPo battery.

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 105dB with some sounds. When housed in a small enclosure, the sound level will be even higher.