1. Bubuka
This manual provides essential information for the safe and efficient operation of your QSC PLD 4.3 1400 Watt Four Channel Power Amplifier. The PLD 4.3 is designed for professional audio applications, offering flexible power distribution, advanced digital signal processing (DSP), and robust performance. Please read this manual thoroughly before installation and operation to ensure optimal performance and longevity of your equipment.
Fitur konci:
- Four channels of full-function onboard loudspeaker DSP with crossover and parametric EQ filters.
- Powerful Intrinsic Correction processing maximizes the sonic performance of QSC loudspeakers.
- 20 factory preset configurations that can be modified and stored in 50 user presets.
- PowerLight universal switch mode power supply with Power Factor Correction (PFC) for high efficiency, improved audio performance, and low weight.
- Four input XLR connectors and six NL4 output connectors.
2. Setélan
2.1 Ngabongkar sareng Inspeksi
Ati-ati ngaleupaskeun ampCabut bungkusna. Pariksa unitna pikeun tanda-tanda karusakan anu mungkin kajantenan nalika transit. Upami kapendak karusakan, langsung hubungi dealer anjeun.
2.2 Rak Pamasangan
The QSC PLD 4.3 amplifier features a 2-space design, reducing weight and rack space requirements. Mount the amplifier securely in a standard 19-inch equipment rack using appropriate rack screws. Ensure adequate ventilation around the unit.

Gambar 1: Hareupeun view of the QSC PLD 4.3 Power Amplifier, showing the display, controls, and ventilation grilles.
2.3 Ngahubungkeun Input
The PLD 4.3 features four routable XLR input connectors. Connect your audio source (e.g., mixer, audio interface) to the appropriate XLR inputs on the rear panel.
2.4 Kaluaran Nyambungkeun
The amplifier provides six NL4 output connectors for connecting to loudspeakers. Ensure correct polarity and impedance matching for your speaker system. The Flexible Amplifier Summing Technology (FAST) allows for various channel configurations (1-channel, 2-channel, 3-channel, 4-channel) to optimize power delivery to different loudspeaker setups.
2.5 Sambungan Daya
Nyambungkeun amplifier to a suitable AC power source using the provided locking IEC power cable. The Power Factor Correction (PFC) ensures efficient and reliable current draw from a single AC breaker.

Figure 2: Rear panel of the QSC PLD 4.3 Power Amplifier, highlighting XLR inputs, NL4 outputs, and the locking IEC power connector.
3. Operasi anu Amppangagung
3.1 Kadali Panel hareup
The front panel features a color display, navigation buttons (HOME, ENTER, EXIT, GAIN), and a rotary encoder for intuitive control and configuration. Input and output mute buttons, along with signal and clip indicators, provide real-time status.
3.2 Fleksibel Amplifier Summing Technology (FAST)
FAST allows for active distribution of amplifier power across channels in various combinations. This enables the amplifier to drive a wide range of loudspeaker systems efficiently, from single high-power subwoofers to multi-channel full-range setups.
3.3 Loudspeaker Processing
The PLD 4.3 integrates sophisticated independent loudspeaker processing per channel, optimizing both amplifier and loudspeaker performance. This includes:
- Input Sensitivity and Gain adjustment.
- Dynamics Processing (RMS and Peak Limiting).
- Source Selection.
- High-pass and Low-pass Crossover Filters (Butterworth, Linkwitz-Riley, Bessel slopes).
- Paramétrik EQ.
- Alignment Delay.
- IIR and FIR Filtering.
- Intrinsic Correction.
3.4 Preset Wizard
The Preset Wizard streamlines setup by providing access to top loudspeaker selections and pre-configured settings. This feature simplifies the configuration process, allowing users to quickly assign and optimize outputs for specific speaker models.
Video 1: Hiji leuwihview of the QSC PLD and CXD series processing amplifiers, demonstrating key features such as Flexible Amplifier Summing Technology (FAST), Power Factor Correction (PFC), sophisticated loudspeaker processing, the Preset Wizard, and the intuitive user interface. This video also highlights the 2-space design and connectivity options.
4. Pangropéa
4.1 beberesih
Rutin ngabersihan exterior tina ampLap nganggo lawon anu lemes sareng garing. Hindarkeun nganggo pembersih atanapi pangleyur anu abrasif. Pastikeun kisi-kisi ventilasi bébas tina lebu sareng runtah pikeun ngajaga aliran hawa anu leres.
4.2 Ventilasi
The amplifier relies on proper ventilation to prevent overheating. Ensure that the front and rear ventilation openings are not obstructed. Operate the amplifier in an environment with adequate air circulation.
4.3 Panyimpenan
Lamun teu dipaké pikeun période nambahan, nyimpen éta amplifier in a cool, dry environment, protected from dust and extreme temperatures.
5. Cara ngungkulan
If you encounter issues with your QSC PLD 4.3 amplifier, tingali léngkah-léngkah ngungkulan masalah umum ieu:
- Henteu aya kakuatan: Check the power cable connection, the power outlet, and any circuit breakers. Ensure the power switch on the rear panel is in the 'ON' position.
- Henteu aya sora: Verify all input and output connections. Check the input source and loudspeaker connections. Ensure the amplifier channels are not muted and gain settings are appropriate.
- Panyimpangan: Reduce input gain to prevent clipping. Check speaker impedance and ensure it matches the amplifier's capabilities. Inspect speaker cables for damage.
- Overheating: Ensure adequate ventilation. Check for obstructed air vents. Reduce the load on the amplifier if it consistently overheats.
For more detailed troubleshooting or persistent issues, consult the comprehensive QSC PLD Series manual available on the official QSC website or contact QSC technical support.
6. Spésifikasi
| Fitur | Spésifikasi |
|---|---|
| merek | QSC |
| Nomer modél | PLD4.3 |
| Jumlah Saluran | 4 |
| Kaluaran Wattage | 1400 Watts (per channel, specific load dependent) |
| Total Kaluaran Daya | 5600 Watt |
| Item Beurat | 20.9 pon |
| Ukuran produk (L x W x H) | 23 x 7 x 20 inci |
| Tipe Pamasangan | Pemasangan di Permukaan (biasana dipasang dina rak) |
| Bahan | Beusi sténless |
| Spesifikasi Met | FCC |
| UPC | 684284060563 |
| Tanggal Kahiji Sadia | 24 Agustus 2013 |
7. Garansi jeung Rojongan
For detailed warranty information, product registration, and technical support, please visit the official QSC website or contact your authorized QSC dealer. Keep your purchase receipt as proof of purchase for warranty claims.
QSC Websitus: www.qsc.com





