Most of us are familiar with connecting speakers to a stereo system: you pull the two conductor speaker cable, connect the red wire to the red terminal on the amp, connect the black wire to the black terminal on the amp, repeat on the right speaker, and then repeat on the left speaker. It’s all pretty simple and straight forward… and it works great for stereo audio in a single room.
But what do you do when you need to distribute audio to speakers in multiple areas? Or if the application won’t really support left and right stereo audio? That’s where a 70/100 volt (or “70/100v”) system comes in…
70/100v amplifiers have a higher signal voltage than conventional stereo audio amplifiers (commonly referred to as “8 Ohm” systems) and allow for more speakers and longer signal distances. This is ideal for any room or building requiring more than two speakers. These systems are commonly used in paging or background music applications, but are a great way to distribute audio anywhere using a very simple wiring concept.
The TL-A70-40W provides 40 watts of power and four audio inputs—a microphone input, two analog stereo line inputs), and a digital audio input (typically a CD player, streaming audio player, or other media player). You can select from any of the three line inputs, and mix it with the microphone together into a single audio stream. That audio stream can be broadcast to multiple speakers simultaneously.
Note:
- The full product specifications below are from the manufacturer and may contain information related to other package quantities that will not apply to the product that you are reviewing. Please confirm the actual content and/or package quantity from the main product specifications page.
- These specifications may represent the entire product series/model/line to which this product belongs with specific configuration differences between the individual products stated.
- These specifications may have been copied from the same product in other region/country in which case there might be minor differences in region-specific data such as Input Voltage, Terms of Warranty etc.
I/O Connections
Analog Inputs: Two(2) RCA jack, One(1) 3.5mm TRS jack
Digital Input: One(1) optical jack
MIC Input: One(1) 3-pin captive screw connector/3.81mm
IR Input: One(1) 3.5mm TRS Jack
RS232 Control: One(1) 3-pin captive screw connector/3.81mm
RS232 ID Selector: One(1) 16 ID codes for control
Button Control(Front Panel): Five(5) buttons in total
MIC Signal Type Selector: One(1) 3-position slider switch
70V or 100V amplifier Output: One(1) 3-pin captive screw connector/3.81mm
DC 24V Power: One(1) Power connector with locking screw (5.5mm outside diameter, 2.1mm inside diameter)
Audio Performance
Input Impedance: >10k Ω
Output Type: Constant voltage 70V or 100V
Maximum Rated Power Output: 40 Watts
Frequency Response: 120 Hz ~ 20 kHz
Common Mode Rejection Ratio (CMRR): >70 dB at 20 Hz ~ 20 kHz
Signal to Noise Ratio (SNR): 80 dB (Max)
Total Harmonic Distortion + Noise (THD+N): 1% at 1 kHz; 0.3% at 20 kHz at Nominal Level
Voltage Gain: 26 dB
Chassis and Environmental
Enclosure: Painted aluminum
Dimensions (W x H x D): 130mm x 44mm x 144mm (5.12in x 1.73in x 5.67in)
Shipping Weight: 1.10Kg(2.43bls)
Operating Temperature (Environment): -10° ~ +40° C(+14° ~ +104° F)
Operating Temperature (Chassis): 45° C(113° F)
Operating Humidity (Environment): 10% ~ 90% Non-condensing
Storage Temperature (Environment): -15° ~ +70° C(+5° ~ +158° F)
Storage Humidity (Environment): 10% ~ 90% Non-condensing
Power, ESD, Regulatory
Maximum Power Consumption: 45W
Power Supply: DC 24V at 2.5A
ESD Protection: 15KV
Regulatory: CE, FCC
Other
Indicators: 1 Power, 2 Input Select ,4 Signal select, 1 Up, 1 Down, 1 Mute
Included Items: Installation guide, Power adapter, Mounting ears(2 ea),Mounting screws(4 ea), RS232 cable, Plastic cushions (4 ea), Pluggable terminal black