A T O N | A275 INSTALLATION MANUAL |
Applications
4/6/8 Ohm Speakers with Volume Controls
• Audio Output to Line Inputs 1 & 2
Speakers | Speakers |
|
| Line Level | |
| Analog Audio | |
| Output | |
ATON | L | R |
VOLUME | ||
CONTROL |
|
|
AVC100R |
|
|
or AVC100SL |
|
|
A275 |
|
|
Figure 2-3: 4/6/8 Ohm Speakers w/ Volume Controls
Using A275 with Impedance Match Volume Controls and Maximum Speaker Wattage
Volume Control
Impedance Match Setting
1X
2X
4X
8X
8Ohm
Speaker Pairs
4
6
8
16
Max Wattage
Available Per
Speaker
18.0
12.0
6.0
1.0
6Ohm
Speaker Pairs
3
4
6
12
Max Wattage |
| 4 Ohm | Max Wattage |
Available Per |
| Speaker Pairs | Available Per Speaker |
Speaker |
|
|
|
|
|
|
|
24.0 |
| 2 | 36.0 |
18.0 |
| 3 | 24.0 |
9.0 |
| 4 | 12.0 |
1.5NOT RECOMMENDED
System Design Considerations
Adding multiple speakers to a power amplifier reduces the amount of power sent to each speaker as the total available wattage is divided among the connected speakers. Beyond customer volume preferences, several factors affect overall amplifier output including input signal gain, impedance, AC voltage, wire run length and gauge, insertion losses with volume controls, room size, etc. This chart assumes simple math and does not represent actual dB, SPL calculations, etc. It is provided as a guideline only to demonstrate theory
&provide some basic design guidance. You can never overpower a system because you have dynamic headroom, or spare power as needed. If you underpower / underamplify a system, the amplifier tends to be pushed past its safety zone which eventually leads to clipping and system failure.
Indoor applications for background audio need only be a few watts, typically 1 to 10. For primary listening areas, you should plan on 5 to 20 watts or more depending upon application. Outdoor applications require a greater amount of power since there is little reflectivity of sound and listening area is larger, so plan on 40 watts or more!
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