Time for Processors | Rockford Fosgate 500.2 guide

III.MOVE THE DECK. If you're at this step, it's time to turn your system into an “amplified deck” by temporarily relocating the deck right ON TOP of the clean amplifier. Then using very, very short signal cables, connect the output of the deck into the input of the amp and test for noise. Play a zero bit track – silence – and make sure all is completely quiet.

A.If still noisy, you're in a heap of trouble. We suggest that you try another deck and give us a call so that we can put your name into the record books. It's a bad car audio day for you.

B.If the deck is quiet, then congratulations, you're on your way to a successful installation. It is now time to slowly, methodi- cally, reinstall the deck back into its final position. Test for noise each step of the way. If the noise returns, suspect the signal cables. Forget shielding because it will have only a very, minimal effect within the audio band. We highly suggest using twisted pair cables or a balanced transmission system for cable induced noise.

Time for Processors:

By the end of Step III, you should have the deck playing quietly with the amp, with the quiet cables quietly routed. So it's time to add the signal processors – one at a time – back into the system. Simply repeat Steps II and III with the equalizer, then the electronic crossover, etc. However, before MOVING THE SIGNAL PROCESSORS to the amplifier, we highly suggest that you power the noisy process from an isolated power supply rather than the car's +12 volts DC and chassis ground. Make sure to also connect the turn- on lead to the isolated power supply. If the processor is now quiet, then it is highly probable that the component has inadequate isolation. Solutions include changing components or permanently adding an external isolated power supply (Call Autosound 2000 at 209-465-3450 for info on isolated power supplies).

Summation:

During the design stage of your vehicles, try to avoid using extra batteries and high output alternators. Extra batteries are nothing but loads as soon as the engine is started and high output alternators usually make more noise than stock alternators. Also, extra batteries installed in the trunk of a car will ALWAYS force extra ripple current to flow over the car.

Install Stiffening Capacitors® as close to the power supply input of your amplifier as possible. The big caps will feed the switching power supplies of your amps and minimize the inductive losses in your power wiring. Plus, they will help your peak system response.

In problem cases, we highly recommend the use of twisted pair cable rather than coaxial cable for RCA leads. This practice will greatly minimize cable induced noise – especially in four channel amps!

Don't forget that your system is only as good as its worst component. Do NOT use components with inadequate power supply isolation or you will be asking for problems.

The best electrical ground on a car is the CHASSIS of the car. Do NOT run ground leads up to the case of the alternator or the negative battery post. Keep ALL ground leads as short as possible.

With properly isolated components, it does NOT matter where the component is grounded. We're sorry to say that with inadequately isolated components, it matters! With poorly isolated components, different grounds can cause different noises.

The deck is the signal reference ground for the entire sound system. The deck usually has THREE connections to the car's chassis: The black ground lead, the base of the antenna, and the metal-to-metal bond between the case of the deck and the chassis of the car. With three grounds, there is usually NO cause to worry about the ground of a deck.

Amplifiers are usually designed with adequate power supply isolation. This means that it should not matter where a deck is grounded. (Decks are grounded three times and amps float. This is car audio!)

The more components installed on a signal path, the more chances for noise to enter a system. The more electrical accessories on a car, the more noise will be produced by the alternator.

This information was compiled from more than 20 years of working in car audio. If you would like more information on this topic, or any other technical aspects of car audio, please call 800-548-8200 and ask for a subscription to Autosound 2000 Tech Briefs

— the monthly magazine for the technically inclined.

– 26 –

500.2 specifications

The Rockford Fosgate 500.2 is a powerful, high-performance amplifier that embodies the brand's signature commitment to quality and innovation in the world of car audio. Designed for audiophiles and casual listeners alike, this amplifier can dramatically enhance the sound experience in your vehicle, making it a popular choice for many car enthusiasts.

At the heart of the Rockford Fosgate 500.2 is its robust power output. The amplifier delivers a remarkable 250 watts per channel at 2 ohms, which ensures that even the most demanding speakers receive ample power. This efficiency allows users to enjoy loud and clear sound without distortion, even at higher volumes. The amplifier's dynamic power management ensures that the audio performance remains consistent across various listening scenarios.

One of the standout features of the 500.2 is its Smart Technology, which includes built-in thermal protection and short circuit protection. This design not only prolongs the life of the amplifier but also enhances performance by preventing overheating and damage during extended use. This is especially beneficial for users who love listening to music at high volume for prolonged periods.

The 500.2 also features a variable high-pass and low-pass crossover, allowing for precise sound tuning. Whether you are aiming for deep bass or crisp highs, the adjustable crossover settings enable users to customize their audio experience to their liking. With a frequency response range of 20 Hz to 20 kHz, this amplifier is versatile enough to handle a wide array of musical genres and audio formats.

Additionally, the amplifier's compact design allows for easy installation in various vehicle types without sacrificing valuable space. Its sleek and stylish chassis not only provides durability but also adds an aesthetic touch to your audio setup.

Lastly, the Rockford Fosgate 500.2 is built with quality materials that make it reliable and long-lasting. The unit's professional-grade construction ensures that it can withstand the rigors of daily use in a car environment. Overall, the Rockford Fosgate 500.2 is an excellent investment for anyone looking to upgrade their car audio system, offering powerful sound, innovative technology, and customization features that cater to both casual listeners and serious audiophiles.