Introduction: Meet the TOA A-2240D — a compact 240 W digital mixer‑power amplifier
The TOA A-2240Dis a purpose-built Class‑D mixer power amplifier designed for public address (PA) and background music (BGM) systems. With 240 W of rated power on a 100 V constant‑voltage speaker line, three balanced mic inputs (one with +21 V phantom power), two line inputs, VOX/paging priority, and tuning controls for tone, the A-2240D targets venues that need reliable, efficient, and simple-to-install audio distribution. Its compact footprint, cool‑running Class‑D topology and a robust metal/ABS construction make it attractive for schools, retail outlets, offices, places of worship and other fixed installations.
Key features at a glance
- 240 W rated output via Class‑D power stage — efficient and lightweight
- Three balanced microphone inputs (MIC1–3), with DC +21 V phantom on MIC1 for condenser mics
- Two line (AUX) inputs for music playback and external sources
- VOX/priority paging that mutes or attenuates background channels for announcements
- 100 V balanced constant‑voltage speaker output ideal for long cable runs and multiple speakers
- Independent bass and treble tone controls (±10 dB) and practical indicators (Power, Signal, Peak)
- Compact, rack or shelf mountable chassis with thermal and current‑limit protection
Detailed specifications and practical benefits
The A-2240D delivers 240 W of rated output and uses Class‑D amplification to provide high efficiency with low heat generation. Class‑D amps are typically more energy‑efficient than Class‑AB designs, which means lower operating costs and less cooling required — a real advantage in equipment closets and compact AV installs. The unit’s power consumption is modest (48 W measured per EN 62368‑1 at 1/8 rated output), reflecting good efficiency when the unit is in normal use.
This amplifier provides three balanced microphone inputs (MIC1–3) set at −60 dB, 600 Ω, which makes them suitable for standard dynamic and condenser microphones. MIC1 includes DC +21 V phantom power for condenser mic operation, reducing the need for external phantom supplies. Two RCA line inputs (AUX1–2) accept consumer audio sources such as media players, mixers or paging consoles at −20 dB, 10 kΩ.
The speaker output is a 100 V balanced, floating constant‑voltage line — the preferred topology for building‑wide PA systems. Constant‑voltage systems simplify multi‑speaker wiring, allow long cable runs with minimal signal loss, and make it straightforward to add or remove speakers without complex impedance calculations. A REC/line RCA output (0 dBV, 600 Ω) provides a convenient feed for recording devices or external processing units.
Independent tone controls (Bass ±10 dB at 100 Hz, Treble ±10 dB at 10 kHz) allow installers and operators to tailor the sound to the venue and source material. The VOX priority paging function automatically attenuates background channels for voice announcements — essential in retail, education and corporate spaces where intelligibility of spoken messages is critical. The A-2240D includes practical protection features such as current limiting, thermal protection and peak indication LEDs to warn of overload conditions, increasing system reliability and longevity.
Measuring 420 × 100.6 × 280.3 mm and weighing 4.0 kg, the unit is compact and suitable for rack or shelf mounting. Its ABS front panel and steel case provide a professional finish and ruggedness for everyday use. Installers should verify regional voltage variants (220–240 V AC vs 120 V versions where applicable) and confirm local approvals and warranty terms. Correct ventilation and proper speaker wiring are important to prevent thermal overload and ensure safe operation.
Use cases and scenarios where the A-2240D excels
The TOA A-2240D is designed for fixed PA and BGM deployments where simplicity, reliability and intelligibility are priorities. Typical applications include:
- Schools and universities: Classroom paging, corridor announcements and assembly halls benefit from the VOX paging and 100 V distribution for multiple speakers across corridors and rooms.
- Retail stores and shopping centres: Background music with occasional live or prerecorded announcements — the phantom power and multiple mic inputs make it possible to connect a microphone for store‑wide messaging.
- Offices and corporate facilities: Reception area music and paging, meeting room audio reinforcement and system feeds for centralized recording or monitoring.
- Places of worship: Clear vocal announcements and music playback across multiple high‑ceiling spaces; 100 V lines simplify multi‑speaker setups.
- Restaurants, hotels and hospitality venues: Background ambiance with the ability to prioritize announcements or paging during service times.
- Small event venues and community centres: A compact, single‑box solution for playback, microphone inputs and public address duties.
Comparisons with similar products and amplifier types
When choosing a PA amplifier, buyers often compare Class‑D models like the A-2240D to traditional Class‑AB amplifiers and other mixer‑amplifier combos. Here are the key tradeoffs:
- Class‑D vs Class‑AB:Class‑D amplifiers, such as the A-2240D, are more energy efficient and lighter, producing less heat for the same output power. This makes them ideal for compact rack spaces and continuous operation. Class‑AB amps may deliver a different tonal character and can be perceived as warmer in some audiophile contexts, but for speech and background music in PA systems, Class‑D provides clear advantages in reliability and efficiency.
- 100 V constant‑voltage vs low‑impedance (4–8 Ω) systems:The A-2240D’s 100 V output simplifies wiring for multiple rooms and long cable runs. Low‑impedance systems can offer higher audio fidelity at close ranges but are more complex to wire for distributed installations and require impedance matching when adding speakers.
- Mixer‑amplifier combos vs separate components:Integrated mixer‑amplifiers like the A-2240D reduce rack space and simplify installation. They are ideal for straightforward PA/BGM needs. Larger or more complex installations may still benefit from separate mixers and amplifiers to allow more flexible signal routing and processing.
Within its product class, the A-2240D competes well on efficiency, feature set and price point for small to medium fixed installations. Its combination of phantom power, multiple mic inputs and VOX paging sets it apart from bare‑bones 100 V amplifiers that lack mixing and paging capability.
Customer testimonials and typical feedback
There are no formal customer testimonials included with this product brief. However, installers and end users of similar TOA mixer‑amplifiers commonly report the following strengths:
- "Reliable voice clarity for paging and announcements — VOX priority makes speech cut through music when needed."
- "Compact and easy to install in a small equipment rack; runs cool compared with older Class‑AB amps."
- "Convenient phantom power on MIC1 removes the need for additional phantom supplies for a condenser mic."
- "100 V output made it straightforward to wire multiple ceiling and corridor speakers across a retail store."
These representative comments reflect practical benefits that installers value: simplicity, intelligibility, and efficient operation. If you require verified customer reviews, consult reseller sites and specialist AV forums where end users post installation notes and ratings for specific TOA models.
Installation, safety and operational tips
- Confirm your region’s voltage variant before installation (220–240 V vs 120 V).
- Ensure adequate ventilation and avoid operating the unit with covers removed.
- Wire 100 V speaker lines correctly, observe wattage taps on line transformers and avoid shorting speaker lines.
- Use the REC/line output to feed a recorder or monitoring feed rather than tapping speaker outputs, which could cause level mismatches.
- Test paging priority and tone settings in situ to optimize speech intelligibility for the acoustic environment.
Conclusion: Why the TOA A-2240D is a solid choice for fixed PA and BGM systems
The TOA A-2240D combines practical features that matter in everyday PA installations: an efficient 240 W Class‑D amplifier, multiple microphone and line inputs, phantom power for condenser mics, VOX priority paging and a convenient 100 V constant‑voltage output. Its compact footprint and protective features make it well suited to schools, retail environments, offices and houses of worship where dependable, intelligible public address and background music are required with minimal fuss.
For installers seeking a balanced blend of power, efficiency and ease of use at a competitive suggested price point (suggested retail price: $399), the A-2240D is an attractive choice. As with any fixed installation, verify the appropriate regional voltage model, follow local regulations, and consult product approvals and warranty details through your supplier. When properly specified and installed, this mixer‑amplifier will give you clear, reliable performance and flexible system integration for a wide range of PA and BGM applications.
