




The AM Series marine amplifiers deliver superior audio amplification specifically engineered for marine conditions, elevating your listening experience on the water with exceptional sound quality. The Class-AB amplifier design ensures efficient performance with minimized distortion. It supports connecting up to two speakers per channel at 2 ohms or bridging two channels at 4 ohms to boost power output. Conformal coated PCBs offer enhanced protection against harsh marine conditions, while the heat sink improves heat dissipation, increasing component durability.
CLASS-AB AMPLIFIER TECHNOLOGY
The Class-AB design provides high power output with reduced distortion to the connected speakers/subwoofers for an enhanced level of audio performance.
ENHANCED SYSTEM PERFORMANCE
The AM Series amplifiers feature built-in variable bass boost, a subsonic filter and variable low/high pass crossover filters for enhanced performance and system protection.
MARINE-READY DESIGN WITH CONFORMAL COATED PCBS
Helping to extend the life of your amplifiers, the AM Series amplifiers are designed with conformal coated PCBs to provide extra protection from the marine elements.
HEAT SINK TECHNOLOGY
The incorporated heat sink is designed to dissipate heat efficiently, providing more thermal stability and enhanced component reliability.
500-WATT 4-CHANNEL AMPLIFIER
The AM Series 500-watt 4-channel amplifier can power up to a maximum of four pairs of speakers or two pairs of speakers and one subwoofer.
| Channels | 4 |
|---|---|
| Physical dimensions (Height) | 229 mm (9.02") |
| Physical dimensions (Width) | 4-Channel: 366 mm (14.41") |
| Physical dimensions (Depth) | 53 mm (2.09") |
| Weight | 4-Channel: 3.25 kg (7.17 lbs) |
| Operating temperature range | 0° to 50° C (32° to 122° F) |
| Warranty | 1 year |
| Operating voltage | 10.8-16 VDC |
| Amplifier class | Class AB |
|---|---|
| Rated continuous (RMS) power (14.4 V input @ 4 Ohm < 1% THD) | 4-Channel: 65 W x 4 |
| Rated continuous (RMS) power (14.4 V input @ 2 Ohm < 1% THD) | 4-Channel: 100 W x 4 |
| Frequency response (+0, -1dB) | 5 Hz-38 kHz (-3 dB, dB @ 4 Ohm rated power) |
| Input sensitivity @ RCA inputs | 0.3 V-8 V RMS (user adjustable) |
| Input voltage range @ RCA inputs | 0.3 V-8 V RMS (user adjustable) |
| Input impedance | 5 kΩ nominal |
| Current consumption (StandBy) | < 1 mA @ 14.4 V input |
| Current consumption (Idle) | < 1 A @ 14.4 V input |
| Current consumption (Max) | 4-Channel: 50 A |
| Fuse rating | 4-Channel: 2 x 25 A ATC blade-type (SAE J1171 compliant) |
| High-pass/low-pass full range filter | Yes (user selectable) |
|---|---|
| HP variable crossover frequency range | 40 Hz-600 Hz |
| LP variable crossover frequency range | 40 Hz-160 Hz |
| Bass boost | 0 dB-18 dB, user adjustable |
Get your Fusion AM504 4 Channel Marine Amplifier in 3 Simple Steps
1
Place an order with confidence using our secure checkout process
2
Allow our warehouse team some time to process your order. Receive order updates via email throughout the process
3
Join over 100,00 other happy Davo's customers. Let us be by your side for all your fishing and outdoors pursuits
Davo's Tackle and Outdoors Online has become a brand that is synonymous with a range of Fishing and Outdoors products that is second to none; at the sharpest pricing available globally.













The AM Series marine amplifiers deliver superior audio amplification specifically engineered for marine conditions, elevating your listening experience on the water with exceptional sound quality. The Class-AB amplifier design ensures efficient performance with minimized distortion. It supports connecting up to two speakers per channel at 2 ohms or bridging two channels at 4 ohms to boost power output. Conformal coated PCBs offer enhanced protection against harsh marine conditions, while the heat sink improves heat dissipation, increasing component durability.
We are working towards a goal of offering customers the biggest range of Fishing And Outdoors products in Australia. The number of products we currently have available is growing daily.
Our customer support office hours are Tuesday only 8am-4pm only. Feel free to use our contact us page to get in touch.
We specialise in Fishing, Dive, Boating and any kind of Outdoors Equipment.
Yes. We are a fully licensed and accredited Australian retailer for every brand of product that we sell. This means all purchases you are making are made through a fully licensed and registered retailer. More details can be found on our Warranty page.
Our inventory and warehouse is directly linked to display accurate stock levels on our website. If you are able to add a product to your cart then we currently have the item available and ready to ship.
Sign up for a back in stock notification on the product page to receive an email as soon as a product becomes available again.
Yes. A few seconds after you place an order you will receive an order confirmation email. Please be sure to check all junk folders.
We like to keep it very simple. We offer free shipping on all orders over $150 in Australia excluding some bulky items like Fishing Rods. We offer a small fixed rate shipping fee for any order of $150 or less in Australia that does not contain bulky items.
We charge a small shipping fee for all bulky items such as fishing rods and other long or heavy products. The small shipping fee that is charged for bulky items will vary depending upon the product.
Our carriers charge us larger fees to ship these items, however we subsidize majority of this cost to provide our customers the best expedience available when shopping for fishing and outdoors equipment online at the best pricing available globally.
It is likely that your order contains bulky items such as Fishing Rods or other long or heavy products.
Yes. We offer International Shipping on most products to a selection of countries. We don’t offer international shipping on certain products. More details are available on our Shipping page.
We are unable to offer an express shipping service.
Most orders are sent via Australia Post. Some items are sent via Star Track Express, Couriers Please, Sendle or Aramex. We decide on who to send an order with during the processing stage.
We ship a large volume of rods daily and we are proud to say we have refined our shipping technique to ensure all rods are delivered in perfect condition.
Rod are fully insulated with high density bubble wrap. After this, rods are inserted into a purpose built and cut to size rod tube which is professionally capped at each end.
We do not offer a click and collect.
We ship orders every business day from our warehouse. We have courier pick ups from our warehouse daily.
Please allow an estimated 1 to 10 fulll business days for you order to be processed. Please note this is an estimate only and the processing stage may take longer than this estimate.
After an order completes the processing stage, you will be sent an automated shipment email containing tracking details.
After an order is processed by our warehouse, the courier delivery times may vary depending on the coruier used and the delivery address.
More detailed information on order processing time frames can be found on our shipping policy page.
We have an ultra simple returns process. All details are available on our returns page.
We are more than happy to assist with this. All details are available on our Warranty page.
Yes. We are a fully licensed and accredited Australian retailer for every brand of product that we sell. This means all purchases you are making are made through a fully licensed and registered retailer. More details can be found on our Warranty page.