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C-Audio Pulse 2x1100 Amplifier Test Results
Classic large and lightweight amp from C-Audio after full repair and service
This amplifier was repaired by us following failure of the power supply and output devices. The amplifier performs well with no surprises or nasties. Low distortion and high power in a lightweight, albeit large, package.
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All results taken with sine wave input into a resistive dummy load of 8, 4 and 2 ohms (where applicable), two channels simultaneously driven (unless otherwise stated), at the threshold of clipping. These results should be considered maximum 'continuous RMS' power ratings (>5 seconds). Distortion measurements, labelled THD%, are taken with an HP8903A audio analyser (80kHz Bandwidth). | |||||||||||||||||||||||||||||||||||
| Manufacturer | C-Audio |
|---|---|
| Model | Pulse 2x1100 |
| Weight | 11 kg |
| Power to weight Ratio1 | 256.6 W/kg |
| Notes | Mains hovered around 242V. Very deep casework. 22-07-2010 |
| Manufacturer's Website | - |
1 Power to weight ratio is calculated by taking the average of the power measurements at 4 ohms, multiplying by the number of driven amp channels, and then dividing this value by the weight of the amplifier.
Click the images below for full-size versions
Description of Images:
- Amplifier front panel.
- Amplifier internals. Switched-mode power supply sits in between the output stages.
- Close-up of the power supply
- Amplifier internals. The Fluke scopemeter on the right shows the mains voltage and waveform.
- Rear of amplifier case
- 1kHz, 8R sine wave, very much into clipping.
- 1kHz, 8R sine wave, full power.
- 40Hz, 8R sine wave, at clipping. The slanting of the tops and bottoms of the waveform is caused by power supply ripple. In this case, it's very good - excellent clippping behaviour.
- 40Hz, 8R sine wave, further into clipping. Excellent clipping behaviour.
- 40Hz 8R sine wave, full power. Excellent performance.
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