Power Consumption
Power consumption states the electrical input power used by a component under a specified operating condition.
It is expressed in watts. Standby, idle, typical and maximum draw are different measurements; multiplying operating power by time gives energy use.
Power Consumption — Subwoofer
Here consumption describes the electrical input used by the subwoofer’s amplifier and supporting electronics. The reported operating state determines what the wattage represents.
Compare idle, standby and driven conditions; this is not its acoustic output or amplifier power rating. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — External Clock
Here consumption describes the electrical input used by the external clock and its supporting circuits. The reported operating state determines what the wattage represents.
Compare normal operation and standby; oscillator warm-up may be a separate stated condition. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — Crossover
Here consumption describes the electrical input used by the crossover’s filters, processing and output circuits. The reported operating state determines what the wattage represents.
Compare the stated operating and standby conditions; this is not the power delivered by downstream amplifiers. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — Phono Preamp
Here consumption describes the electrical input used by the phono stage and its supporting circuits. The reported operating state determines what the wattage represents.
Compare normal operation and standby, including whether an external supply is included. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — DAC
Here consumption describes the electrical input used by the DAC’s digital and analogue circuitry. The reported operating state determines what the wattage represents.
Compare the stated operating mode and supply boundary; this is not analogue output power. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — Upscaler
Here consumption describes the electrical input used by the upscaler’s processing and interface circuits. The reported operating state determines what the wattage represents.
Compare the stated processing and standby conditions, including any separately powered supply. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — Equalizer
Here consumption describes the electrical input used by the equalizer’s processing and supporting circuits. The reported operating state determines what the wattage represents.
Compare normal and standby conditions, rather than interpreting consumption as signal output power. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — Headphone Amp
Here consumption describes the electrical input used by the headphone amplifier and its supporting circuits. The reported operating state determines what the wattage represents.
Compare idle and driven conditions; headphone output power is a separate measurement. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — Power Supply
Here consumption describes the electrical input used by the external supply together with the load included in the measurement. The reported operating state determines what the wattage represents.
Compare the specified connected load; input draw differs from available DC output power. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — Music Server
Here consumption describes the electrical input used by the server’s computing, storage and interface hardware. The reported operating state determines what the wattage represents.
Compare the stated idle or active workload and installed storage configuration. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — Optical Equalizer
Here consumption describes the electrical input used by the optical equalizer and any included cartridge supply. The reported operating state determines what the wattage represents.
Compare the stated operating setup and whether cartridge power is included. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — Streamer
Here consumption describes the electrical input used by the streamer’s processing and interface circuits. The reported operating state determines what the wattage represents.
Compare normal playback and network-standby conditions, which may have different consumption. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — CD Transport
Here consumption describes the electrical input used by the CD transport’s drive, control and output circuits. The reported operating state determines what the wattage represents.
Compare playback, stopped and standby conditions rather than treating them as equivalent. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — Preamp
Here consumption describes the electrical input used by the preamplifier’s gain, buffer and control circuits. The reported operating state determines what the wattage represents.
Compare normal operation and standby, including the scope of any separate supply. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — Power Amp
Here consumption describes the electrical input used by the power amplifier’s supply and audio stages. The reported operating state determines what the wattage represents.
Compare idle, stated audio output and maximum conditions; mains draw is not rated speaker output power. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — SACD Transport
Here consumption describes the electrical input used by the SACD transport’s drive, control and output circuits. The reported operating state determines what the wattage represents.
Compare the stated disc-playback or standby condition and the included supply. A maximum rating and a typical operating measurement answer different questions and should retain their labels.
Power Consumption — SFP Ethernet Cable
For an SFP Ethernet module, consumption is power taken from the host port, rather than a direct mains connection. It contributes to the host’s power and thermal budget.
Compare the same module type and operating condition. Optical transmit power is a separate quantity, and the module’s electrical consumption is not the power consumption of the complete network device.