Features & Applications
Features
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Applications
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Detailed Description FFA-6004
FFA-6004 supplies four channels for medium and larger full-range systems, loudspeaker frequency sections and stage monitoring. The current model page specifies 900 W per channel at 8 Ω and 1500 W per channel at 4 Ω. Full-power delivery with all channels operating into 4 Ω loads supports systems with several separately amplified sections.
Amplification and power supply
FFA’s proprietary Class D PWM output stage works with a high-current switch-mode supply to provide efficient amplification. The supply incorporates soft start. A side-chain TCA clip limiter controls overload, while output-DC protection, current protection, short-circuit protection and thermal shutdown form part of the protection system.
Four balanced female XLR inputs are accompanied by parallel male XLR links. The speakON arrangement supports four-core bi-amp wiring through the additional pins on channels 1 and 3. Individual front-panel level controls and signal, level, clip and protection indicators provide access to the functions needed during system operation.
Operation and installation
The aluminium chassis occupies two rack units and weighs 10 kg according to the current model page. Rear-to-front forced-air cooling uses a signal-proportional 80 mm fan. FFA lists larger full-range cabinets, mid/HF sections of touring or installed systems, high-power stage monitors and medium-output bass cabinets among its intended applications.
Explore Full Fat Audio amplifiers at B-Star and the Full Fat Audio range. Manufacturer references: Manufacturer brochure / overview — FFA-4004 / FFA-6004 (PDF page 1), Manufacturer datasheet — FFA-4004 / FFA-6004 (PDF page 2), FFA amplifier user manual.
Technical Specifications FFA-6004
AMPLIFIER |
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| OUTPUT CHANNELS | 4 |
| POWER PER CHANNEL AT 8 Ω | 900 W |
| POWER PER CHANNEL AT 4 Ω | 1500 W |
| TOTAL RATED OUTPUT AT 4 Ω | 4 × 1500 W |
| VOLTAGE GAIN | 32 dB |
| THD+N | Typical 0.05% at 4 Ω, 1 kHz; percentage unit confirmed by the FFA user manual |
| FREQUENCY RESPONSE | 20 Hz–20 kHz, ±0.5 dB |
| OUTPUT STAGE | FFA Class D PWM |
| POWER SUPPLY | High-current switch-mode supply with soft start |
| LOUDSPEAKER PROTECTION | DC at output; clip limiting using a side-chain TCA circuit |
| AMPLIFIER PROTECTION | Short circuit, current overload, thermal shutdown and high-frequency stability circuit |
| 4 Ω OUTPUT CONFIGURATION | All four channels driven simultaneously, as described on the model page |
CONNECTIONS |
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| ANALOGUE INPUTS | 4 × balanced Neutrik female XLR |
| INPUT WIRING | Pin 1: ground; pin 2: hot (+); pin 3: cold (−) |
| ANALOGUE LINKS | 4 × male XLR parallel signal-through connections |
| LOUDSPEAKER OUTPUTS | Neutrik speakON per channel |
| BI-AMP WIRING | Channels 1 and 3 also use pins 2+/2− for four-core loudspeaker wiring |
| MAINS CONNECTOR | 1 × Neutrik 20 A powerCON |
CONTROLS AND INDICATORS |
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| LEVEL CONTROLS | 40-position potentiometer per channel |
| POWER CONTROL | Power-on switch |
| SIGNAL INDICATOR | Green at −20 dB |
| LEVEL INDICATOR | Yellow at −3 dB |
| CLIP INDICATOR | Red |
| PROTECTION INDICATOR | Red for overcurrent, low AC mains or the 3-second power-up mute |
MAINS POWER AND COOLING |
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| MAINS REQUIREMENT (MODEL SOURCE) | 1 × 16 A, 230 V AC circuit; published operating range 185–230 V AC; 120 V version configured at the factory |
| COOLING | High-airflow 80 mm fan with signal-proportional speed control |
| AIRFLOW | Rear to front |
MECHANICAL |
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| ENCLOSURE | Tour-grade aluminium chassis |
| RACK FORMAT | 19-inch rack; 2U |
| DIMENSIONS H × W × D | 88 × 483 × 510 mm |
| DEPTH REFERENCE | Includes integral rear rack support |
| WEIGHT | 10 kg |
Model-page values are used where the archived shared datasheet or older user manual differs. Refer to the linked model documents for the applicable hardware and mains configuration.
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