CAP-4320 - Receiver DENVER - Free user manual and instructions

Product Type	Car Audio Amplifier
Brand	Denver
Model	CAP-4320
Dimensions (W x H x D)	280 x 170 x 53 mm
RMS Output Power (4Ω)	60W x 4 channels
RMS Output Power (2Ω)	90W x 4 channels
Bridged Power (4Ω)	180W x 2 channels
Total Harmonic Distortion (THD)	< 0.15%
Frequency Response	10 Hz - 30 kHz (±2 dB)
Signal-to-Noise Ratio	> 90 dB
Input Sensitivity	200 mV - 8 V
Recommended Fuse	2 x 25A
Power Supply Voltage	12V DC (negative ground)
Crossover Modes	Full, HPF, LPF
Bass Boost	0 - 12 dB
Speaker Impedance (Stereo)	4Ω - 8Ω
Speaker Impedance (Bridged)	3Ω - 8Ω (subwoofer), 4Ω - 8Ω (full range)
Protection Circuits	Thermal, short circuit
Installation	Professional installation recommended; ensure dry, ventilated location
Warranty	Refer to manufacturer

Frequently Asked Questions - CAP-4320 DENVER

What should I do if there is no output from the amplifier?

Check the remote turn-on voltage at the amplifier (must be +12V). Verify the power and ground connections are secure and the fuse is not blown. Ensure audio input cables and speaker wires are properly connected.

Why does the audio cycle on and off?

This may be due to thermal protection engaging if the amplifier overheats (chassis temperature >90°C). Ensure proper ventilation. Also check for blown speakers or loose audio input connections.

How can I fix distorted output?

Reduce the gain setting if it is set too high. Check the speaker impedance load: ensure it is not below 2Ω in stereo or 4Ω in bridged mono. Verify that speaker wires are not shorted and that speakers are properly connected.

What is the recommended speaker impedance for bridging?

For subwoofer use, the minimum load is 3Ω; for full range operation, use 4Ω minimum. Connecting lower impedances may cause overheating and trigger thermal protection.

Why is the bass response poor?

Check speaker polarity: incorrect wiring can cause cancellation at low frequencies. Also ensure the crossover (HPF/LPF) settings are configured correctly. Reset crossovers as described in the manual.

What causes the amplifier fuse to blow?

Common causes: excessive current draw due to low speaker impedance (below 2Ω stereo or 4Ω mono), short circuits in power wiring, or using a fuse with a lower rating than recommended (2 x 25A). Check and replace with proper size.

How do I connect the power wires?

Connect the +12V terminal to the battery with a fuse (same rating as original) placed as close to the battery as possible. Ground securely to a metal part of the car. Use wire gauge at least 10 AWG for power and ground. The remote terminal (REM) should receive +12V from the head unit's remote or antenna wire.

Can I use this amplifier with 2Ω speakers?

Yes, in stereo mode each channel can drive 2Ω loads (90W RMS). For bridged operation, the minimum impedance is 3Ω (subwoofer) or 4Ω (full range). Using lower impedances may cause overheating.

How do I configure the crossover?

Use the crossover mode switch: FULL for no filtering, HPF for high-pass (adjustable 32Hz-2kHz), LPF for low-pass (adjustable 32Hz-250Hz). Set the frequency according to your speakers and subwoofer requirements.

What is the function of the bass boost?

The bass boost allows you to add up to 12dB of gain at low frequencies. Adjust the control knob from 0dB to 12dB. Use it sparingly to avoid distortion or overdriving the speakers.

USER MANUAL CAP-4320 DENVER

denver-electronics.com

OWNER'S MANUAL

CAR AUDIO SYSTEM

PLEASE READ CAREFULLY BEFORE INSTALLING OR OPERATING THIS UNIT.

CAP-4320

WARNING

Make sure you choose a suitable place to mount the unit. The position should be completely dry with a good circulation of air, and from a mechanical point of view very stable.

System Planning

Proper system planning is the best way to maximize your amplifier performance. By planning your installation carefully you can avoid situations where the performance of the reliability of your system is compromised. Your authorized dealer has been trained to maximize your system's sonic potential. Your dealer is a valuable resource in helping you with your system design and installation.

Speaker Requirements

Each channel of your amplifier can easily drive 4Ω speaker loads when used in the stereo mode. When a channel-pair is bridged, the recommended minimum load impedance is 3Ω for subwoofer use, and 4Ω for full range operation. Although operation with lower impedances is not likely to cause immediate damage to the internal circuitry, the unit will most likely overheat, causing the thermal protection circuitry to shut down the amplifier. When the chassis cools down, normal operation will resume. Continuing to operate the amplifier under these conditions is not recommended and will reduce its life expectancy.

Most speakers designed for car audio operation are 4Ω impedance. Connecting two such speakers in parallel will result in a 2Ω impedance load as seen by the amplifier. Some subwoofer models feature a dual 4Ω voice coil design. Connecting these voice coils in parallel will result in a 2Ω nominal impedance, which is not recommended for use with bridged channels of your amplifier.

EN EN
8Ω 8Ω
4Ω 4Ω
Series wiring Series wiring
Parallel wiring Parallel wiring
Series/parallel wiring Series/parallel wiring

Power Connection Leads

Notes on the power supply

Connect the + 12V power input lead only after all other leads have been connected.

Be sure to connect the ground wire of the unit securely to a metal part of the car.

A lose connection may cause a malfunction of the amplifier.

REMOTE: The unit is turned on by applying + 12Volts to this terminal. This terminal dose not draw heavy current like the two power terminal so a thinner connecting wire is acceptable.

Standard 18 GAUGE is fine and the standard colour is yellow. If the radio is equipped with a power antenna control wire, it can drive this terminal. If the power antenna wire is already in use, you can still splice into it. With this method, the unit will turn on automatically with the radio. Use the power supply lead with a fuse attached whose value is the same as original fuse.

Place the fuse in the power supply lead as close as possible to the car battery.

During a full power operation. Maximum current will run through the system. Therefore, Make sure the that the leads to be connected to the + 12v and GND terminals of the unit respectively must be larger than 10-Gauge (AWG. 10).

System 1 4 channel mode

EN EN
4~8Ω 4~8Ω

System 2 bridged connection subwoofer

EN EN
4~8Ω 4~8Ω

Trouble Shooting
Symptom Possible Cause Action to Take

no output low or no remote turn-on input check remote turn-on voltage output at amplifier and correct as needed
	fuse blown check power wire integrity and reversed polarity repair as needed and replace fuse
	power wires not connected check power wire and ground connections and repair of replace as needed
	audio input not connected or no output from source check input connections and signal integrity, repair or replace as needed
	speaker wires not connected check speaker wires and repair or replace as needed
audio cycles on and off	speakers are blown check system with known working speaker and repair or replace speakers as needed
	thermal protection engages make sure there is proper ventilation when amplifier heatsink for amplifier and improve ventilation as temperature exceeds 90°C needed
	loose or poor audio input check input connections and repair or replace as needed
distorted output amplifier level sensitivity set too high; exceeding maximum output capability of amplifier reset gain referring to the tuning section of the manual for detailed instructions
	impedance load to amplifier check speaker impedance load if below 2Ω stereo or 4Ω mono rewire speakers too low to achieve a higher impedance
	shorted speaker wires check speaker wire connections and repair or replace as needed
	speaker not connected to check speaker wiring and repair of amplifier properly replace as needed refer to the installation section of this manual for detailed instructions

Symptom Possible Cause Action to Take

distorted output	speakers are blown check system with known working
		speakers and repair or replace as needed
poor bass response	speakers wired wrong polarity causing cancellation at low frequencies	check speaker polarity and repair as needed
	crossover set incorrectly reset crossovers referring to the multi-cross crossover configuration section of this manual for detailed instructions
battery fuse blowing	impedance load to amplifier too low	check speaker impedance load, if below 2Ω stereo or 4Ω mono rewire speakers to achieve a higher impedance
	short in power wire or incorrect power connections	check power and ground connections and repair as needed
	fuse used is smaller than recommended	replace with proper fuse size
	too much current being drawn	check speaker impedance load, if below 2Ω stereo or 4Ω mono rewire speakers to achieve a higher impedance
	short in power wire or incorrect	check power and ground connections and repair as needed
amplifier fuse blowing	too much current being drawn	check speaker impedance load, if below 2Ω stereo or 4Ω mono rewire speakers to achieve a higher impedance and replace with recommended fuse size
		check power and ground connections and repair as needed
	fuse used is smaller than recommended	replace with proper fuse size

Specifications

CAP-4320

RMS output power 4Ω (Watts) 60W RMSx4CH

RMS output power 2Ω (Watts) 90W RMSx4CH

Bridged power 4Ω (Watts) 180W RMSx2CH

THD <0.15%

Frequency response (±2db) 10Hz\~30KHz

Signal to noise ratio >90dB

Sensitivity 200m V\~8V

Recommended fuse type 2 x 25A

Dimensions 280x 170 x 53(mm)

Please notice - All products are subject to change without any notice. We take reservations for errors and omissions in the manual.

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