QP2320 - Receiver Citronic - Free user manual and instructions

Product Type	Quad Power Amplifier
Model	QP2320
Brand	Citronic
Power Supply	230V AC 50Hz (IEC)
Output Power RMS @ 8Ω	4 x 300W
Output Power RMS @ 4Ω	4 x 450W
Output Power RMS @ 2Ω	4 x 580W
Input Connections	4 x XLRF (balanced)
Output Connections	4 x XLRM (parallel from inputs), 4 x SPK connectors
Input Impedance	20kΩ
Frequency Response	5Hz - 50kHz
Total Harmonic Distortion (THD)	0.05%
Slew Rate	40V/µs
Signal-to-Noise Ratio	103dB
Controls	4 x channel gain controls
Circuit Protection	Short-circuit, DC, overload, soft-start
Dimensions (W x D x H)	483 x 439 x 88mm
Weight	23.5kg
Cooling	Front and rear ventilation grilles, internal fans
Indicators	Power, Protect, Clip, Signal LEDs per channel
Safety	Do not expose to rain/moisture; no user-serviceable parts; disconnect before cleaning
Cleaning	Soft cloth with neutral detergent; vacuum vents; avoid strong solvents
Spare Parts / Repairability	No user-serviceable parts; refer servicing to qualified personnel
Warranty	Damage from misuse not covered

Frequently Asked Questions - QP2320 Citronic

What is the minimum impedance per channel for the QP2320?

The minimum impedance per channel is 2Ω. Ensure the combined load on each channel is not lower than this.

How do I connect multiple amplifiers in parallel?

Use the XLR parallel output connectors on the rear panel to cascade the signal to other amplifiers. These outputs are simply connected in parallel with the inputs.

What does the red PROTECT LED indicate?

The red PROTECT LED lights when internal protection circuitry detects a fault (e.g., short circuit, DC offset, overheating). Switch off and check speakers and cables; if it persists, consult qualified service personnel.

Why is there no sound even though the power LED is on?

Check that input signals are present, cables are connected, and the channel gain controls are not turned fully down. Also verify speaker cabinets and leads.

How can I prevent the amplifier from overheating?

Ensure adequate airflow around the unit, do not cover the front or rear ventilation grilles, and rack-mount with proper support. Keep away from heat sources and direct sunlight.

What is the soft-start function?

The soft-start function performs internal checks before engaging power to the amplifiers, taking a few seconds. This reduces inrush current and protects the unit.

How do I clean the amplifier?

Use a soft cloth with neutral detergent for the casing. Clean ventilation grilles with a vacuum cleaner. Do not use strong solvents.

What does the CLIP LED signify?

The red CLIP LED illuminates when the output signal is reaching clipping level. If it lights more than briefly, reduce the volume to avoid distortion and potential speaker damage.

Can I use this amplifier in a 4-zone mono system?

Yes, the QP2320 can be used as a 4-zone mono system by treating each channel independently. It can also be configured as 2 stereo amplifiers or a stereo subs + stereo mid-tops.

What should I do if the amplifier goes into Protect Mode?

Switch off and disconnect from mains. Check speakers for short circuits using a multimeter, inspect cables, and ensure cooling vents are clear. Power up again; if still in Protect Mode, seek qualified service personnel.

USER MANUAL QP2320 Citronic

Caution: Please read this manual carefully before operating

Damage caused by misuse is not covered by the warranty

Introduction

Thank you for choosing the Citronic QP-series quad power amplifiers as part of your sound reinforcement system. These high output amplifiers are designed to offer high quality, dependable service for mobile and installed systems. Please read this manual fully and follow the instructions to achieve the best results with your new purchase and to avoid damage through misuse.

Warning

To prevent the risk of fire or electric shock, do not expose any of the components to rain or moisture. If liquids are spilled on the casing, stop using immediately, allow unit to dry out and have checked by qualified personnel before further use. Avoid impact, extreme pressure or heavy vibration to the case No user serviceable parts inside – Do not open the case – refer all servicing to qualified service personnel.

Safety

• Check for correct mains voltage and condition of IEC lead before connecting to power outlet
• Ensure speaker leads are good condition with no short connections or damaged plugs
• Check impedance of speaker loads do not exceed the minimum stated load for the amplifier
• Do not allow any foreign objects to enter the case or through the ventilation grilles

Placement

• Keep out of direct sunlight and away from heat sources
• Keep away from damp or dusty environments
• When rack-mounting, ensure adequate support for the base of the amplifier and firm fixings for the front
• Ensure adequate air-flow and do not cover cooling vents at the front and rear of the amplifier
• Ensure adequate access to controls and connections

Cleaning

• Use a soft cloth with a neutral detergent to clean the casing as required
• Use a vacuum cleaner to clear ventilation grilles of any dust or debris build-ups
• Do not use strong solvents for cleaning the unit

Front Panel

1. Cooling vents
2. Protect LED indicators
3. Clip LED indicators
4. Signal LED indicators
5. Channel gain controls

Rear Panel

1. Cooling fan vents
2. Parallel input and output XLRs (balanced)
3. Speaker output connectors
4. IEC mains inlet and fuse

Operation

Determine how the system is to be connected. This quad amplifier may be treated as 2 stereo amplifiers, a stereo subs + stereo mid-tops amplifier or a 4-zone mono system.

Connect speaker cabinets to channel outputs using good quality leads and ensure that the combined load on each channel is no lower than 2Ω

(for speaker loads connected in parallel, 4 + 4 = 2 ... or even... 8 + 8 + 8 + 8 = 2 )

Connect each signal input from mixer or other line level source via the XLR connectors on the rear panel using good quality XLR leads.

If the signals are to be cascaded onto other amplifiers, connect these via the XLR line parallel signal outputs. These are simply connected in parallel together with the relative inputs.

Connect the amplifier to the mains outlet, making sure that the IEC lead is earthed, in good condition and connected securely.

With channel gain controls turned fully down, switch on the power to the amplifier. This unit has a "soft-start" function which makes some checks before engaging power to the amplifiers, which may take a few seconds.

With mixer (or other signal source) levels turned down, gradually increase the amplifier's channel gain controls to the required level (normally full) and then gradually increase the signal level from the mixer or sound source until sound can be heard through the speakers and then continue increasing up to the required level.

During use, green "SIGNAL" LEDs will illuminate to show when a signal is present and red LED "CLIP" LEDs illuminate if the output is reaching clip level. If the red CLIP LEDs illuminate more than very briefly, reduce the volume until they hardly light up at all.

If the internal protection circuitry detects a fault in the speakers or amp, the channel(s) will enter Protect Mode and red "PROTECT" LEDs will illuminate on the front panel to show this. Switch the amplifier off and check the entire system (including leads) before powering up again. If still in Protect Mode, seek advice from qualified service personnel.

Before powering down, turn the channel gain controls fully down to avoid loud noises when switching off.

Specifications

	QP1600	QP2320
Power supply	230Vac 50Hz (IEC)
Power RMS @ 8Ω	4 x 200W	4 x 300W
Power RMS @ 4Ω	4 x 300W	4 x 450W
Power RMS @ 2Ω	4 x 400W	4 x 580W
Input : Line	4 x XLRF balanced
Output : Line	4 x XLRM (parallel from inputs)
Input impedance	20KΩ
Frequency response	5Hz - 50kHz
THD	0.05%
Slew rate	40V/usec
S/N ratio	103dB
Controls	4 x channel gain
Speaker outputs	4 x SPK connectors
Circuit protection	Short-circuit, DC, overload, soft-start
Dimensions	483 x 439 x 88mm
Weight	22kg	23.5kg

Troubleshooting

No power light on front panel switch	Ensure IEC inlet is connected to mains and mains lead is in good condition
	Ensure mains outlet is switched on
Power light is on but no other LEDs and no output	Check input signal and connection leads
	Ensure channel gain controls are not turned fully down
Power light and Signal LEDs are lit but no output	Check speaker cabinets are in good working order
	Check speaker leads are OK and connected properly
"PM" (Protect Mode) LED is lit and there is no output	Switch off and disconnect from mains
	Check speakers are in good working order and not shorted out (using a multi-tester)
	After checking all connected items, power up again
	If still in Protect Mode, switch off again and refer to qualified service personnel
	Ensure cooling vents are clear and amplifier is not overheated
Output is very distorted and "CLIP" LEDs are lighting	Check the speaker impedance is not below rated Ohms
	Turn down the input level from audio source
	Turn down channel gain controls
Output is working but at very low level	Ensure input source is at line level
	Increase input level from audio source
	Turn up channel gain controls

Disposal: The "Crossed Wheelie Bin" symbol on the product means that the product is classed as Electrical or Electronic equipment and should not be disposed with other household or commercial waste at the end of its useful life. The goods must be disposed of according to your local council guidelines.