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, built 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. It comes from the Science Lab Supplies factory at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, which quotes it for schools, colleges, tender contractors and distributors.
Specifications
Ratings, frame and size of the demonstration speaker are set out one per row. In short, a 125 mm, 8 Ω driver rated 10 W RMS (20 W PMPO) sits in a robust beech wood and acrylic frame of 225 x 175 x 100 mm, with 4 mm sockets on the front and use in either orientation.
| Specification | Value |
|---|---|
| SKU | LSK-PL-10289 |
| Power rating | 10 W RMS |
| Peak rating | 20 W PMPO |
| Impedance | 8 Ω |
| Speaker diameter | 125 mm |
| Frame | Robust beech wood and acrylic |
| Connections | 4 mm sockets mounted on the front |
| Orientation | Vertical or horizontal |
| Dimensions | 225 x 175 x 100 mm |
| Intended use | Laboratory demonstrations using sound |
| 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.
- Comparing a generated tone with the forks of a Tuning Fork Set.
- Resonance in air columns at a known frequency, as studied with the Resonance Apparatus Brass Pipe.
- 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, so the school physics lab equipment in India arrives as one 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. Whether you need one speaker or a matched pair, ask through the contact page, gather the items in the enquiry cart, or tender via the lab tender page.
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?
The loudspeaker unit, frame included, is manufactured in the Science Lab Supplies factory at Saha, Ambala, India, and the company 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, connected through 4 mm sockets on the front of the frame.
Related Sound and Signal Equipment
A loudspeaker needs a signal source, and many sound experiments also pick the sound back up to display or measure it. These items provide suitable generators, a microphone, an oscilloscope, a sound level meter and a reflection apparatus, so a complete sound demonstration bench can be quoted in one go.
- Signal Generator — speed-sensitive frequency control and a built-in 10 W amplifier.
- Bench Signal Generator — sine and square output, up to 1 W into 8 Ω.
- Audio-Frequency Generator — audio source from 1 to 100 kHz with an uncalibrated amplitude knob.
- Microphone — crystal microphone in a moulded plastic box, 55 x 110 x 22 mm.
- Oscilloscope — helps show signal shape, frequency, amplitude and noise.
- Digital Sound Meter — 30–130 dB range with A and C weighting and fast/slow response.
- Law of Reflection of Sound Apparatus — for measuring the incident and reflected angles of sound waves.
Browse the full Physics Lab range or all physics lab equipment.
Last updated: 22 October 2026
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