Crown DC300A
2 channel/Stereo Power Amp
Specifications
Performance
- Frequency Response: ±0.1 dB from DC to 20 kHz at 1 watt (see Figure 6.9).
- Phase Response: +0/–15 degrees from DC to 20 kHz at 1 watt (see Figure 6.5).
- Signal-to-Noise Ratio: (20 Hz to 20 kHz) At least 110 dB below rated maximum average power (see Figure 6.8).
- Harmonic Distortion (THD): Less than 0.001% from 20 to 400 Hz and increasing linearly to 0.05% at 20 kHz at rated maximum average power.
- Intermodulation Distortion (IMD): (SMPTE-IM 60 Hz and 7 kHz) Less than 0.05% from 0.01 to 0.25 watts, and less than 0.01% from 0.25 to rated maximum average power.
- Damping Factor: Greater than 750 from DC to 400 Hz
- Crosstalk: See Figure 6.6.
- Slew Rate: Greater than 8 volts per microsecond.
- Voltage Gain: (At maximum output) 20.6:1 ±2% or 26.3 dB ±0.2 dB.
- Also see the power matrix. Note: Maximum average power per channel at 1 kHz with 0.1% or less THD.
- Dual mode (both channels driven): 305 watts into 4 ohms. 175 watts into 8 ohms. 100 watts into 16 ohms.
- Bridge-Mono mode: 610 watts into 8 ohms. 355 watts into 16 ohms.
- Load Impedance: Rated for 16, 8 and 4 ohm use. Safe with all types of loads.
- Power Supply: 1 kilowatt transformer with computergrade filter capacitors storing over 48 joules of energy.
- Power Requirements: Requires 50 to 400 Hz AC with selectable transformer taps for 100, 120, 200, 220 and 240 VAC (±10%) operation. Draws 40 watts or less at idle and 500 watts at rated power.
Independent level controls and power switch are located on the front panel. Non-interacting DC balance
controls are mounted on main PC board under electronics cover. A Dual-Mono switch is located below the
input jacks on the back panel.
Indicators
- Power: This yellow indicator remains lit while the amplifier is turned on.
- IOC: These red indicators are normally off. They flash in the unlikely event of the output waveform differing from the input by 0.05% or more. They act as sensitive distortion indicators providing proof of performance.
- Input Impedance: Nominally 25 K ohm.
- Input Sensitivity: 1.75 volts ±2% for 310 watts into 16 ohms.
- Input: ¼ inch unbalanced phone jacks.
- Output: Color coded binding posts (banana jacks).
- Output Impedance: Less than 7 milliohms in series with less than 3 microhenries. See Figure 6.2.
- Dual: Unbalanced, dual channel.
- Bridge-Mono: Balanced, single channel.
- Overall Protection: AC line fused. Thermal switch in
- AC line protects against overheating caused by insufficient ventilation. Controlled slew rate voltage amplifiers protect overall amplifier against RF burnouts. Input overload protection is furnished by internal resistance at inputs of amp.
- Amplifier Output Protection: Short, mismatch, and open circuit proof. Limiting is instantaneous with no flyback pulses, thumps, cutout, etc. No premature limiting on transients.
- Turn-On: Instantaneous, with minimum thumps and no program delay
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