SW-1 DSP Subwoofer Amplifier
ELECTRONICS CURRENT DRAW AND BTU GUIDE
| Quick US 120V Breakdown | Total Max number of SA2’s | Total Max number of SA3’s |
Total Max number of SA8’s |
| 15A Branch Circuit | 4 | 3 | 2 |
| 20A Branch Circuit | 5 | 4 | 3 |
|
Watts in Rack Only (for rack cooling) |
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|
Product |
Standby | Idle | 12.50% | 25.00% | 33.30% |
100% |
| SA-2 / SA-2DSP | 0.43 | 24 | 42.8 | 61.5 | 74 | 174 |
| SA-3 / SA-3DSP | 0.43 | 29 | 57.1 | 85.3 | 104 | 209 |
| SA-8 / SA-8DSP / IA-8DSP | 0.3 | 30.5 | 60 | 89.6 | 109.2 | 219.5 |
| SW-1 / SW-1DSP | 0.15 | 12.8 | 21.6 | 30.4 | 36.3 | 83.3 |
|
BTU/hr*Waste Heat Not Used for Audio |
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|
Standby |
Idle | 12.50% | 25.00% | 33.30% |
100% |
| 1.5 | 81.9 | 145.9 | 209.8 | 252.5 | 593.7 |
| 1.5 | 99 | 194.9 | 290.9 | 354.9 | 713.1 |
| 1 | 104 | 205 | 306 | 373 | 749 |
| 0.5 | 43.7 | 73.7 | 103.8 | 123.9 | 284.2 |
|
Total Current Draw 120V Mains (in amps) |
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| Product | Standby | Idle | 12.50% | 25.00% | 33.30% |
100% |
| SA-2 / SA-2DSP | 0 | 0.2 | 1.4 | 2.6 | 3.39 | 9.78 |
| SA-3 / SA-3DSP | 0 | 0.24 | 2.04 | 3.84 | 5.03 | 14.24 |
| SA-8 / SA-8DSP / IA-8DSP | 0 | 0.25 | 3.8 | 7.1 | 9.3 | 15(1) |
| SW-1 / SW-1DSP | 0 | 0.11 | 0.63 | 1.15 | 1.5 | 4.28 |
|
Total Current Draw 230V Mains (in amps) |
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|
Standby |
Idle | 12.50% | 25.00% | 33.30% |
100% |
| 0 | 0.1 | 0.73 | 1.35 | 1.77 | 5.1 |
| 0 | 0.13 | 1.06 | 2 | 2.63 | 7.43 |
| 0 | 0.25 | 2 | 3.7 | 4.9 | 12(1) |
| 0 | 0.19 | 0.37 | 0.68 | 0.88 | 2.54 |
Current Draw is based on 4Ω loads across all outputs, with all outputs driving the same source material (mono input signal).
8Ω loads would be approximately half the current draw typically.
Use the 12.5% column for calculating high-volume level operating conditions.
12.5% is 1/8th power pink noise, which is the equivalent of typical of program material being played at onset of clipping levels.
The 33% Column is typical of the power draw when the amplifiers are experiencing extreme clipping on program material.
The 100% Column is the theoretical maximum power draw with a pure sign wave input.
NOTES: (1) Maximum continuous current draw is limited by the maximum safety ratings of the SA-8 / IA-8. Short term power to the speaker terminals are approximately double.
Documents / Resources
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WISDOM SW-1 DSP Subwoofer Amplifier [pdf] User Guide SW-1 DSP Subwoofer Amplifier, SW-1 DSP, Subwoofer Amplifier, Amplifier |