COM104
Public Address Amplifier 40W @70/100V
Highlights
- unbalanced stereo line input
- 1 x Microphone input
- Priority audio inputs with phantom power
- 1 x priority mute contact
- Lightweight class-D amplifier
- Terminal block output connections (4Ω, 70V, 100V)
- Compact design
- Low impedance & constant voltage output
- Table top or half rackspace installation
Applications
- null
- Retail
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The COM104 is a compact but versatile public address mixing amplifier which offers solutions for small to medium size audio systems in commercial installations. Typical applications are background music systems in retail stores, bars, restaurants and office buildings.
The compact and simple design allows installation in any location and operation through any possible user.
The amplifier is designed using Class-D amplifier technology and delivers an output power of 40 Watt to constant voltage (100V and 70V) or low impedance (4 Ohm) audio systems. A switch mode power supply allows compatibility with a wide variation of mains voltages for global compatibility.
A stereo line input allows connection for a wide variation of audio sources such as media players, radio tuners, internet audio players, ... and many more. A balanced mic/line input allows connection for an announcement microphone with compatibility for condenser microphones using the integrated phantom power supply (15V). A priority switch overrides the background music when enabled, and compatibility with voice file players is guaranteed by the wide gain adjustment possibility (0 dB - +50 dB).
The COM104 is a table-top standing device, while rack mounting in 10.5" or 19" equipment racks is possible using an optionally available mounting set (MBS310).
| System specifications | ||||
|---|---|---|---|---|
| RMS/AES power handling | @ 4 Ω | 1 x 40 W | ||
| Inputs | Balanced Microphone | Sensitivity | -0 dB ~ +50 dB | |
| Connector | 3-pin Euro Terminal Block (Pitch - 3.81 mm) | |||
| Type | 1 x Balanced Microphone | |||
| Unbalanced Stereo | Type | 1 x Stereo Unbalanced Line | ||
| Connector | RCA / 3.5 mm Jack | |||
| Sensitivity | -4 dB ~ +20 dB | |||
| Frequency | Response (± 3 dB) | 20 Hz - 20 kHz | ||
| Signal / Noise | > 90 dB | |||
| THD+N (@ 1 kHz) | < 0.5% (1/2 Rated Power) | |||
| Crosstalk (@ 1 kHz) | > 70 dB | |||
| Technology | Class-D | |||
| Power | Supply | Switching mode | ||
| Operating | 100 ~ 240 V AC / 50 ~ 60 Hz | |||
| Inputs | Balanced Microphone | Phantom Power | 15 V DC | |
| Priority mute contact | ||||
| Outputs | Connector | 4-pin Euro Terminal Block (Pitch - 5.08 mm) | ||
| Voltage / Impedance | 100/ 70 V / 4 Ω | |||
| Protection | Amplifier | DC Short circuit | ||
| Over heating | ||||
| Over load | ||||
| Signal limiting | ||||
| Cooling | Convection cooled | |||
| Operating temperature | 0° ~ 40° @ 95% Humidity | |||
| Product Features | ||||
|---|---|---|---|---|
| Dimensions | 8.56 x 1.72 x 11.81 " (W x H x D) | |||
| Weight | 6.61 lb | |||
| Mounting | 1/2 19” / 1 HE or tabletop | |||
| Construction | Steel | |||
| Colours | Black | |||
| Accessories | Optional | 19” Rackmount adapter | ||
| Product | Unit of measure | Quantity | |
|---|---|---|---|
| AU960103027 - COM104 DEVICE | PCS | 1 | Collapse |
Product
Answer
As the power consumption of an amplifier, strongly depends on how hard the amplifier is driven, measurements are provided for various loads: idle, 1/8 of average full power, 1/3 of average full power, and full power.
Idle
Current draw at idle or with very low signal level
1/8 Power: Pink Noise
Amplifiers are tested using pink noise signals to simulate real-world speech and music signals. It approximates operating with music or voice with light clipping and represents the amplifier's typical "clean" maximum level, without audible clipping. This 1/8 power signal provides a very good approximation of how hard an amplifier would be driven by typical real-world speech/music signals, assuming those signals were being driven as loud as possible without clipping the amplifier.
1/3 Power: Pink Noise
1/3 Power Pink Noise is similar to 1/8 Power Pink Noise, except that it is a significantly more powerful input signal. It approximates operating with music or voice with very heavy clipping and a very compressed dynamic range. This 1/3 power signal provides an approximation of how hard an amplifier would be driven by typical real-world speech/music signals, assuming those signals were being driven loud enough to clip the amplifier heavily, and produce severe, audible distortion.
Full Power
Current draw at full power is measured with a sine wave at its maximum possible level. However, it does not represent any real-world operating condition and represents the absolute extremes that an amplifier could ever experience.
Answer
Heat dissipation is the process by which electronic devices like amplifiers and processors release the heat they generate during operation to prevent overheating. This data is important because it ensures devices perform efficiently, last longer, and are safe to use. To calculate heat dissipation, you measure the device's power consumption (in watts) and use the thermal resistance (how well the device transfers heat) to determine how much heat needs to be managed. This information helps design proper cooling systems, ensuring the device remains within safe temperature limits.
The heat dissipation list for all Audac devices is in the link below.
Information sheet English
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| Code | Quantity | Length | Width | Height | Cubage | Weight |
|---|---|---|---|---|---|---|
| PRODUCT | 1 | 0,22 m | 0,30 m | 0,06 m | 0,00396 m³ | 2,39 kg |
| PCS | 1 | 0,25 m | 0,43 m | 0,08 m | 0,00860 m³ | 2,78 kg |
| INNER | 1 | - | - | - | - | 2,12 kg |
| MASTER | 8 | 0,44 m | 0,54 m | 0,34 m | 0,08078 m³ | 23,34 kg |
| PALLET | 112 | - | - | - | - | 237,44 kg |
