APlus A-501S Ceiling Speaker

APlus A-501S Ceiling Speaker is a specialized surface-mounted speaker line belonging to the public address system (PA) manufactured by Bosch brand - one of the world's leading technology corporations.

The product is designed to serve the needs of background music and public announcements in buildings such as offices, shopping malls, hotels, schools, hospitals, etc. With a rated capacity of 6W, you can choose the power level of 2.5W - 5W - 10W through the integrated transformer.

The APlus A-501S is capable of operating flexibly in 70V/100V systems, allowing for even distribution of sound over a wide area while maintaining high clarity. In addition to its good sound reproduction, the product also scores with its modern design, compact size, quick installation and long life.

Design & construction materials – Lightweight, durable and optimized for ceiling mounting

APlus A-501S Ceiling Speaker is designed as a round speaker with an overall size of 265mm in diameter and 85mm in height, suitable for all types of ceilings from concrete, plaster to wood. The speaker shell is made of HIPS (High Impact Polystyrene) plastic - a super durable material, with good impact resistance, not warped or brittle under the influence of temperature and humidity.

The product is finished with an elegant white paint, making it easy to blend in with any interior design, even high-end spaces that require high aesthetic consistency. Weighing only 1kg, the speaker is easy to install, without putting pressure on the ceiling frame system. This is an optimal choice for projects that require long-term sustainability and safety during operation.

Audio Performance – Wide Frequency Range, Clear Sound

The APlus A-501S Ceiling Speaker has impressive sound performance in the announcement speaker segment. The product has a sensitivity of up to 93dB and a frequency response of 80Hz to 19kHz - a wide frequency range that reproduces both mid and high tones well, ensuring clear voices when making announcements and soft music when playing background music.

Thanks to the built-in power transformer, the speaker allows flexible power level selection: 2.5W - 5W - 10W, suitable for each area of ​​use and avoids overload causing distortion or lack of power.

Bosch has optimized the diaphragm and internal voice coil technology to reduce distortion and improve the accuracy of speech transmission. This is especially important in areas such as hospital corridors, hotel lobbies or reception areas where clear, easy-to-understand and unobtrusive sound is required.

Compatibility – Easy integration with any sound system

The APlus A-501S speaker is equipped with inputs compatible with both 70V and 100V voltage standards, allowing easy integration with any central audio system using traditional or modern standards.

This speaker line is suitable for connection to high power amplifiers such as Bosch Plena, TOA, or any audio partitioning device that requires high synchronization.

Support for multiple selective power levels allows sound engineers to adjust the system to each separate speaker zone, thereby building a reasonable sound map without the need for expensive intermediate equipment. The product also supports common wire connections with secure wiring terminals, minimizing the risk of loose wires or signal interference during long-term operation.

Installation – Simple, time and cost saving

One of the big plus points of the APlus A-501S Ceiling Speaker is the ability to install quickly without drilling holes in the ceiling like traditional ceiling speakers. Just by drilling the wire and screwing the speaker base, users can complete the installation in just a few minutes, especially convenient when deploying a series of devices in large projects.

The construction does not require complex positioning frames, limiting the destruction of the original ceiling, very suitable for projects that need to preserve architecture or urgent construction. With light weight, sturdy structure and smart screw system, APlus A-501S Speaker helps installation units optimize labor costs and actual implementation time.

Maintenance & Cleaning – Easy and Effortless

Due to the use of high-quality HIPS plastic that is dustproof and moisture-proof, the APlus A-501S is easy to clean with a dry or slightly damp soft cloth without disassembling. Users can perform periodic maintenance every 3-6 months depending on the installation environment (humid, dusty, outdoors, etc.).

In addition, because the speaker uses a high voltage connection according to the audio distribution system standard, the possibility of short circuit or component damage is very low if the system operates stably. Bosch also recommends checking the wiring system once a year to ensure absolute safety during operation.

Compare with speakers in the same segment

Compared to traditional ceiling products such as TOA PC-658R or JBL Control 24CT, APlus A-501S stands out thanks to its flexible adjustable power, high sensitivity (93dB) and convenient surface-mounted design, no need to cut the ceiling.

While models like TOA only support a maximum power of 6W and a sensitivity of 90dB, Bosch can operate at 10W and still maintain clear sound quality thanks to a wide frequency range of 80–19kHz. In addition, the HIPS plastic housing makes Bosch lighter and more durable in humid environments compared to powder-coated metal models that are prone to oxidation. In terms of installation flexibility, Bosch has the absolute advantage as there is no need to drill holes or use a hanging frame, which is especially useful in renovation projects.

Frequently asked questions about APlus A-501S Ceiling Speaker

Where is the APlus A-501S Ceiling Speaker suitable for installation?

APlus A-501S is specially designed for hannouncement sound system and background music in commercial buildings, offices, hotel lobbies, medical centers, restaurants, cafes or public areas in apartment buildings. The surface-mounted design makes the speaker easy to install in both new and renovated projects.

What voltage does the speaker support? Do I need a dedicated amplifier?

The product supports both 70V and 100V voltage levels – the standard in professional PA systems. Users need to use karaoke amplifier has corresponding output transformers such as Bosch Plena or TOA to ensure stable operation and no loss of sound quality.

Can the speaker power be customized?

Yes. APlus A-501S allows you to select the power level of 2.5W – 5W – 10W through the tap adjustment button on the integrated transformer. This is very convenient to balance the volume for different speaker zones in the same system, avoiding the situation where the speaker is too loud or too small.

Can the APlus A-501S Ceiling Speaker be used outdoors?

The speaker is designed to operate stably in indoor or covered environments. With a moisture-proof, dust-proof HIPS plastic shell, the speaker can still be installed in hallways, outdoor halls or covered balconies. However, it should not be installed directly in the rain and sun to avoid reducing the lifespan.