Tech Support
- Technical support from FUSION Electronics
General FAQs
A simple guide to the Ohms Law.

What is Fusions 1 year Consumer Warranty Policy ?
FUSION Electronics offers a limited one year warranty on all car audio products - ensuring all FUSION speakers, subwoofers, amplifiers, active enclosures, bass packs, head units or accessories are free from defects in material and workmanship, accirding to the following terms and conditions:
- The limited warranty for the FUSION product purchased extends to the first twelve (12) months beginning on the date of purchase of the product.
- The limited warranty extends only to the original consumer purchaser (consumer) of the product and is not assignable or transferable to any subsequent purchaser/end user.
- The limited warranty extends only to consumers who purchase the product in one of the countries (or areas) set forth on www. fusionelectronics.com. The limited warranty is only valid in FUSION’S intended country (or area) of sale of the product.
- During the limited warranty period, FUSION or its authorised service network will repair or replace, at FUSION or FUSION’S authorised dealer, any defective product or parts thereof with new and return the product to the consumer in working condition. No charge will be made to the consumer for either parts or labour in repairing or replacing the product. All replaced parts and cosmetic parts should be free of defects at the time of shipment and, therefore shall not be covered under these limited warranty terms.
- Repaired product will be warranted for the balance of the original warranty period or for ninety (90) days from the date of repair, whichever is longer.
- All warranty claims must be accompanied with a copy of this warranty card, and a copy of proof of purchase date.
The consumer shall have no coverage or benefits under this limited warranty if any of the following conditions are applicable:
- The product has been subject to: abnormal use, abnormal conditions, improper storage, exposure to excessive moisture or dampness, exposure to excessive temperature or other such environmental conditions, unauthorised modifications, unauthorised connections, unauthorised repair including but not limited to use of unauthorised spare parts in repairs, misuse, neglect, abuse, accident, alteration, improper installation, acts of God, spill of foods or liquids, maladjustment of customer controls or other acts which are beyond the reasonable control of FUSION, including deficiencies in consumable parts such as fuses, and breakage or damage to antennae unless caused directly by defects in materials or workmanship, and normal wear and tear of the product.
- FUSION was not notified by the consumer of the alleged defect or malfunction of the product during the applicable limited warranty period.
- The product serial number or the accessory date code has been removed, defaced or altered.
- The product was used with or connected to an accessory not supplied by FUSION or fit for use with FUSION product, or used in a manner other than its intended use.
If a problem develops during the limited warranty period, the consumer should take the following step-by-step procedure:
1.The consumer shall return the product to the place of purchase for repair or replacement processing.
2.The consumer shall also be charged for any parts or labour charges not covered by this limited warranty. The consumer shall be responsible for expenses related to
reinstallation of the product.
3.If the product is returned to FUSION after the expiration of the warranty period, FUSION’s normal service policies shall apply and the consumer will be charged accordingly.
THE BENEFITS CONFERRED BY THIS LIMITED WARRANTY APPLY TO THE EXTENT THAT THEY ARE NOT SUPERCEDED BY ANY OTHER RIGHTS AND REMEDIES UNDER ANY APPLICABLE LEGISLATION THAT CANNOT BE EXCLUDED. OTHERWISE, TO THE EXTENT PERMITTED BY LAW, ANY IMPLIED WARRANTY IS EXCLUDED AND THE FOREGOING WARRANTY IS THE PURCHASER’S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED. TO THE EXTENT PERMITTED BY LAW, FUSION SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES OR A LOSS OF ANTICIPATED BENEFITS OR PROFITS, OUT OF USE OR INABILITY TO USE THE PRODUCT.
- Some states in America do not allow the exclusion or limitation of consequential damages, so the above limitation and exclusion may not apply to you. This warranty gives you specific legal rights which may vary from state to state.
- FUSION neither assumes nor authorises any authorised service centre or any person or entity to assume for it any other obligation or liability beyond that which is expressly provided for in this warranty.
- All warranty information, product features and specifications are subject to change without notice.
Why does my Mono block or single channel amplifier have 4 speaker terminals ?
Some Mono block (single channel) amplifiers have 4 speaker output terminals as shown below. These are internally linked Positive together and Negative together, this is to make connection to multi coil Subwoofers easier when you configure in parallel. You can connect each coil directly to the terminals (one per side) rather than at the subwoofer.
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Why do my Headlights/Dash lights pulse in time with the bass of my music ?
This happens as a result of your amplifier trying to draw as much current (amps ) as it can to produce large/loud bass notes, low frequency notes are the biggest culprit. In some cases the Alternator is unable to supply enough to the amp and other devices. As a result of this other devices may not function correctly like headlight etc. You need to ensure that your alternator is providing the correct Amperage or it may need replacing or reconditioning. Apply a load test to your battery to ensure it is in good working condition. Do not assume that adding a capacitor or a second battery will solve the problem because if the alternator is not providing enough Amperage it will only solve it temporarily. Investigate a higher output alternator.
What Size Inline Fuse Should I Use For the power cable to My Amplifier ?
The Inline fuse should be fitted as close to the battery as possible and the rating (amperage) the same or higher than the total on board fusing of your Amplifier. This fuse is to protect the power cable from grounding and potentially starting a fire.
My 4 channel Amplifier CA-AM40700/CA-AM41200 has only 2 channels working.
This could be happening if you have selected 4 channel on the Input selection switch but have only 2 channels connected. The input selector must be set to the correct position. If 2 channel is selected (with 2 channels connected) the output is supplied to all 4 output channels and if 4 channels are connected but 2 channels are selected you will only get 2 output channels. For more information contact us at Tech Email
What is the best way to match my Speakers/Subwoofer to an Amplifier ?
My speakers are 300 watts “MAX” and 90 watts “Rated Power” what size amp
do I need to drive them to achieve the best performance.
. When you are choosing an amplifier to drive speakers or a Subwoofer you should
use the “RMS” per channel ratings(Amplifier) and the “Rated Power”
(Speaker/Subwoofer) as the reference for your choice. Always define which
ratings you are comparing and try and get them as close as you can.
“Max/Peak” Power Rating
The “MAX/PEAK” power rating of a speaker is the amount of power
that the speaker can handle in short bursts or peaks without causing
permanent damage to the voice coil.If this rating is exceeded constantly
you will risk burning the voice coil.
“Rated Power” Power Rating
The “Rated Power” rating of the speaker is generally considered to be the
nominal constant power that the speaker will handle continuously
without causing damage.
Therefore if your speakers are rated at 90 watts (Rated Power) you should drive
them with an amplifier that is capable of supplying 90 watts RMS per
Channel or as close to that as possible. That is not to say that an amp
capable of a higher output cannot be used if the amplifier settings are
managed responsibly realising the potential to overdrive your speakers
exists. This rule also applies to using an amplifier that is under driving
your speakers. Constantly driving a distorted signal from an overdriven
Source to your speakers can cause damage to the voice coils
How do I bridge my Amplifier ?
Bridge mode is commonly used to get more output power from amplifiers by combining two single channels output into one output. This can only be done safely if you know the minimum load (Ohms) permissible when bridged. This is more common when driving Subwoofers that have Dual voice coils or when you have multiple Subwoofers. First check the installation manual or look at the speaker terminal block on the amplifier as they normally have a diagram showing the bridged connections.
This is an example of a 4 channel amp speaker connection terminal block. As shown bridging is achieved by connecting the positive terminal from the left channel and the negative terminal of the right channel to the corresponding terminals on the subwoofer coil or coils depending on configuration. There are a number of different configurations depending on the load applied to the amplifier. See Subwoofer coil configuration. It all depends on whether you have a 4 Ohm, 2 Ohm or 1 Ohm stable amplifier (mono). An example of the different power ratings for a four channel amplifier are as follows.

100 Watts RMS x 4 @ 4 Ohms
200 Watts RMS x 2 Bridged @ 2 Ohms
These are examples only to give you an idea how this works. This also applies for 2 channel amplifiers and depends on whether they class AB or D class amps as the 1 Ohm rating applies to D class amps in general.
Install tips and guides
My Amplifiers Protection Light Is On
If the protection LED is illuminated this indicates the Amplifier is in protection mode due to a fault condition. There are numerous causes for this and it may mean the Amplifier will need to be inspected and diagnosed by a Technician. It may also be a speaker or subwoofer causing the fault condition.
To eliminate this as a possible cause disconnect the speakers or subwoofer from the output of the amplifier . If the Amplifier still goes into protection mode with nothing connected to the out terminals this indicates a fault with the amplifier.
Power Cable Voltage Drop Table
When running power cable for Amplifiers it is wise to calculate what the voltage drop will be especially if you are using long runs . The below table will help you to calculate the correct size cable you require.

Amplifier Gain Control Adjustment (input sensitivity)
The gain or level pot is not a volume knob, it is used to match the relative output level (voltage) of your source unit to the input circuit of your amplifier. The gain control determines how far you have to increase the volume on your source unit for the amplifier to reach full power. If you have your gain set too low your amplifier will not be able to reach full power and this could allow the source unit to clip which in turn will result in a distorted signal being delivered to your speakers. This is especially relevant with low voltage sources (lower than 2.5volts typically OEM units). With higher voltage sources (2.5volts or higher) if the gain is set too high the amplifier will be able to reach full power at a lower volume control setting from the source unit. This will allow the amplifier to be driven into clipping. The gain settings should generally be set lower, meaning a higher setting on the volume control of the source, to minimize amplifier clipping.
Guide to Setting Gain Control
If you do not have the correct equipment (oscilloscope) this may help
you to set your gain.
1. Once you have installed the system power it down.
2. adjust the amplifier gain to the minimum.
3. power up the system and adjust the volume control of your source unit
to about 3/4 of the way up.
4. slowly increase the gain control until it reaches the maximum level you
are comfortable with or until it starts to clip, and then reduce the level
until you are happy that you will not damage your speakers or Subwoofer.
General Amplifier installation guide
Before any wiring and installation is performed, FUSION recommends you first plan the complete installation. Look at wiring routing, amplifier location and fitment. Please re-check the installation at completion
.
Appropriate mounting is very important for prolonged life expectancy of any amplifier. Select a location that allows enough space so sufficient airflow is maintainable and a location that provides protection from moisture. Keep in mind that an amplifier should never be mounted upside down. Upside down mounting will compromise heat dissipation through the heatsink and could engage the thermal protection circuit.
Excessive heat will shorten your amplifiers life. To maximise heat dissipation, be sure to leave at least 2.5 inches of clearance around the amplifier. If space is of the essence and the amplifier must be mounted in an enclosed or restricted area, a small 3 inch fan should be used in correspondence with a duct so the heat can flow past the heat sink.
WARNING: Do not mount any amplifier on a subwoofer enclosure as extended exposure to vibration may cause malfunction of the amplifier
INSTALLATION WARNING
1: Ensure the vehicle 12 volt lead is removed from the battery before any equipment is connected
2: Investigate the vehicles gas tanks, brake lines and electrical wiring locations before you begin installation
3: Attach the product securely to the vehicle to prevent damage in the event of an accident
4: Ensure all wiring is protected to avoid damage or pinching of the cables
WIRING
Make sure before any connection is made to the amplifier or source unit, ensure that you turn the audio system off. Failure to do so could result in either the stock system or your new FUSION product being damaged. FUSION will not warranty damaged amplifiers due to incorrect installation.
When wiring FUSION amplifiers, ensure that the wires are away from sharp objects and that rubber grommets and insulated bungs are used when wiring through door jams and any other steel panels.
CONNECTION
Note: Ensure the audio system is off during the installation of FUSION product. Once the installation is complete FUSION recommends that you turn the volume of the source unit up slowly so not to damage the speakers. Please recheck the complete installation prior to turning the audio system on.
GROUND/EARTH
Always ensure that the ground connection point is a clean bare metal connection and it is a good idea to apply silicone over the bolt and connection to prevent rust forming. If the amplifier is powered on without an Earth connection or a poor connection this will cause damage to the amplifier and / or head unit as it will try to find an earth via the least path of resistance which could be through the RCA connectors back to the Head Unit . This will burn the Earth track on the Head Unit or it may go through the chassis of the Amp to the floor of the car. This is traceable by a technician to verify the cause of the damage.
Trouble shooting
General Amplifier Trouble Shooting
My Amplifier isn’t working.
- Check to see which, if any, LED indicator is on.
No LED
- If neither indicator is on first check your inline fuse in the power cable near the battery. (If blown replace with the same rated fuse ).
- Ensure the Earth/Ground and power connections on the terminal block of the Amplifier are clean and tight.
- Ensure your remote wire has a good connection at the amplifier and Head Unit/Source.
- Check amplifier fuses, if blown replace with the same rated fuse but if they fail again you may have a problem in your amplifier circuit.
Do not replace with a higher rated fuse as this could result in major damage.
- If the problem persists please consult your authorized dealer at your place of purchase.
Protection LED On
- If the red protection LED is on it may be that the amp has gone into Thermal protection (overheating).
- Let the amp cool down for 15-30 minutes and try again.
- If the amp still goes into protection it could be the result of a speaker/sub problem, disconnect the speaker/sub from the amp and turn the amp on.
If the power indicator comes on and stays on that would indicate that you have a problem with your speaker/sub.
- If the protection LED comes on you may have an intenal problem with your amp.
- There could be a fault that needs professional diagnosing and servicing.
- If the problem persists please consult the authorized dealer at your place of purchase.
Power LED On No Sound
- This can indicate that the amp is not receiving a signal from the head unit/source, check your RCA cables and settings.
- Check the wiring connections on the output of your amp and the subwoofer.
- You may have a problem with the output circuit of your amplifier.
- If the problem persists please consult the authorized dealer at your place of purchase.

