LD1500 Preamp Effects Processor Bluetooth Performance Reverb Processor Spectrum Equalizer Microphone Feedback Suppressor Tuner 1. Microphone: - Input interface: 14 TRS balanced connector - Input impedance: 2K ohms - Frequency response: 20Hz to 30kHz, +-1dB (peaktrough) - THD (total harmonic distortion): 0.015% at +4dBu voltage, 1kHz - Noise level: ≤-80dB - High-frequency EQ: ±7dB10kHz - Midrange EQ: ±7dB2kHz - Low-frequency EQ: ±7dB100Hz 2. Port connections: - Line input: RCA - Input impedance: 56k ohms 3. Speaker line output: - Frequency response: 20Hz-30kHz, ±1dB (peaktrough) - High-frequency range: ±7dB10kHz - Low-frequency range: ±7dB100Hz 4. Subwoofer output: - Low-frequency adjustment: 25Hz, -250Hz, -18dBoct - THD (total harmonic distortion): 0.015% at +4dBu voltage, 1kHz - Output impedance: 100 ohms 5. Power supply: AC 110-240V, 50-60Hz 6. Power consumption: 15W 7. Remote control power: 2 AA batteries (not included) 8. Size: about 48 x 15.5 x 7.5cm Features: 1. Advanced feedback suppression circuitry prevents howling 2. Synthetic resin knobs with superior damping for smoother adjustment and extended lifespan 3. Full metal enclosure with stainless steel paint finish; top panel vents prevent overheating 4. Digital HD display for clearer signal frequency readouts and easier adjustments 5. Non-slip pads prevent bottom scratches 6. Includes remote control for convenient distance adjustments