Demonstration Loudspeaker
Product Code : LSK-PL-10289
Demonstration Loudspeaker (SKU LSK-PL-10289) is a 125 mm, 8 ohm speaker in a beech wood and acrylic frame, made for sound demonstrations in the physics laboratory. Driven by a signal generator, it lets a whole class hear changes in frequency and amplitude, standing upright or lying flat. Science Lab Supplies manufactures the unit in Ambala, India, at Plot 448, HSIIDC Industrial Area, Saha, and supplies it directly to schools, colleges, tender contractors and distributors.
Specifications
The speaker is rated at 10 W RMS (20 W PMPO) with an impedance of 8 Ω, and connects through 4 mm sockets on the front of the frame. The robust beech wood and acrylic frame measures 225 x 175 x 100 mm and can be used vertically or horizontally.
| Parameter | Value |
|---|---|
| SKU | LSK-PL-10289 |
| Power rating | 10 W RMS (20 W PMPO) |
| Impedance | 8 Ω |
| Speaker diameter | 125 mm |
| Frame | Beech wood and acrylic |
| Connections | 4 mm sockets on the front |
| Orientation | Vertical or horizontal |
| Dimensions | 225 x 175 x 100 mm |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Demonstration Loudspeaker
Connected to a signal generator, the loudspeaker turns an electrical signal into sound the whole class can hear, making pitch, loudness and frequency easy to demonstrate. Because it can stand upright or lie flat, it adapts to different bench layouts in school sound lessons and college waves practicals.
- School science: pitch linked to frequency, loudness to amplitude.
- Resonance in air columns driven at a known frequency.
- Testing the range of human hearing with a frequency sweep.
- Interference of sound using two speakers on one generator.
Standard Scope of Supply
The Demonstration Loudspeaker is supplied as a single unit: the 125 mm, 8 Ω speaker fitted in its beech wood and acrylic frame with front 4 mm sockets. The signal generator that drives it and the connecting leads are separate and can be added to the same quotation.
Packing, MOQ and Lead Time
Quotations are available for one loudspeaker or several, for example a pair for interference work, and each states the packing, delivery time and price for that quantity. A matching signal generator can be listed alongside to complete a school physics lab equipment in India order.
As a registered exporter with an Importer-Exporter Code, Science Lab Supplies is able to ship to buyers in Qatar, Sri Lanka, Vietnam, Malaysia, Peru and Egypt. To enquire, write through the contact page, collect products in the enquiry cart, or see the lab tender page if you are buying under a tender.
Frequently Asked Questions
What should drive the loudspeaker?
A signal generator or audio amplifier able to drive an 8 ohm load. The speaker is rated at 10 W RMS, so keep the source within that rating and connect it through the front 4 mm sockets.
Can it be used lying flat?
Yes. The frame is designed so the loudspeaker can be used either vertically or horizontally, letting teachers place it to suit the demonstration or the bench layout.
Is Science Lab Supplies the manufacturer or a trader?
It is the manufacturer. Science Lab Supplies builds the loudspeaker unit in its own factory at Saha, Ambala, India, and deals with buyers directly, so the quotation is issued by the maker.
How big is it?
The frame measures 225 x 175 x 100 mm and holds a speaker 125 mm in diameter, a size that sits easily on a demonstration bench or teacher's desk.
Related Sound and Signal Equipment
A loudspeaker needs a signal source, and many sound experiments also pick the sound back up to display it. These four items provide suitable generators, a microphone and an oscilloscope, so a complete sound demonstration bench can be quoted in one go.
- Signal Generator — function generator with a built-in 10 W amplifier.
- Bench Signal Generator — sine and square waves, 1 W into 8 Ω.
- Microphone — crystal microphone for viewing voice waveforms.
- Oscilloscope — shows signal shape, frequency and amplitude.
Browse the full Physics Lab range or all physics lab equipment.
Last updated: 25 September 2026
