Product Spotlight: JL Audio AP600/6

A few decades ago, amplifiers designed for marine applications were not only huge but also inefficient and, crucially, not truly waterproof. Things have come a long way since then, and JL Audio has recently introduced a new series of products specifically for high-performance marine and powersport applications. In this spotlight, we’ll look at the new JL Audio AP600/6 amplifier.

Introducing JL Audio AP Amplifiers

Before we dive into the specifics of the AP600/6, let’s look at the features common to the entire AP Series of products. These amplifiers were designed to provide ultra-reliable performance in marine, powersport and even motorcycle applications. They are completely free of analog controls that might require removable panels or plugs. How did they accomplish this? The amplifiers use a digital signal processor for sensitivity, crossover, bass boost, infrasonic filter, and polarity adjustments. The up and down arrow and Mode/CH buttons on the front panel, combined with a simple dot-matrix display, make it easy for your installer to complete the configuration process. With the amplifier completely sealed, it has an IP67 water and dust intrusion rating.

The AP Series includes four products: the four-channel AP300/4, rated for 50W x 4 into four ohms or 150W x 2 into a pair of four-ohm bridged loads; the monoblock AP300/1, which can deliver 300 watts into a two-ohm load; and the impressive AP600/6, a staggered power six-channel amp. There is also an amp called the AP200/4BT. This amp is rated a 4 x 40 watts into four ohm and includes a BT audio streaming receiver and a controller to adjust volume, track selection or source (BT or Aux input).

The JL Audio AP200/4BT is a four-channel amp with Bluetooth A2DP and AVRCP.

JL Audio AP600/6 Specifications

The six-channel AP600/6 is rated to deliver 50 watts per channel into four ohms for the four main outputs and 100 watts per channel to channels five and six. These last two channels can be bridged to provide 300 watts into a single four-ohm load. At 2 ohms, the main channels deliver 75 watts, and channels five and six deliver 150 watts each. The amp isn’t designed to drive a two-ohm load in mono. This is an ideal solution for marine applications with four main speakers and two tower speakers, or could be used with two towers and a subwoofer – just to name a few configurations.

Additional specifications include a CTA-2006-D-compliant signal-to-noise ratio of better than 70 dB when referenced to 1 watt of output from 20 Hz to 20 kHz. Frequency response is listed as being 20 Hz to 20 kHz with a tight tolerance of 1 dB. Idle current is between 1 and 1.5 A, and dark current is specified to be under 1 mA. The six-channel amp has low- and high-voltage signal input ranges that accept 0.2 to 2 or 0.8 to 8 volts RMS.

All three pairs of channels can be run full-range or have high- or low-pass filters applied. The filters in the amp use second-order -12 dB/octave slopes and are adjustable from 20 to 500 Hz. The bass boost is centered nice and low at 37 Hz and can boost around this frequency by up to 18 dB. The AP600/6 has an adjustable infrasonic filter on channels five and six that’s adjustable from 20 to 50 hertz with a second-order slope. This amp doesn’t have a polarity reverse adjustment in the menu.

The amp has an Easy Tune mode that allows it to work with select Fusion source units with DSP and the Fusion Audio smartphone app.

JL Audio AP6006 — A dot-matrix display on the front panel makes setting up the amp easy for your installer.

Connections and Installation

Electrical connections are on pigtails at either end of the amp. The left side has six pairs of 18-AWG speaker-wire connections, along with a remote turn-on connection and an 8-AWG connection. These connections are 10 inches long. The right side has three pairs of RCA jacks and a factory service USB port connection. The amp doesn’t have a built-in over-current protection device, so your installer should install a 70-amp fuse on the end of the power wire. Four-AWG should be run to the battery connections to ensure efficient operation.

Footprint-wise, the AP600/6 measures 11.81 inches (30 cm) long, 5.9 inches (15 cm) wide, and is 1.86 inches (4.7 cm) thick. These dimensions exclude the wires and their injection-molded strain reliefs. The amp mounts using the provided M4 x 35mm (approx. #8 x 1-3/8) fasteners that pass through the corners of the cast aluminum heatsink.

Upgrade Your Marine or Powersports Application with JL Audio AP-Series Marine Amps Today!

Whether you are shopping for a small amp with a Bluetooth receiver to power a system in your fishing boat, or you want a higher-power solution like the AP600/6 for a small cruiser, the new AP Series of amplifiers from JL Audio should have what you need. Drop by a local authorized retailer today. You can find out more about the AP Series amplifiers by visiting the Garmin website.

Be sure to follow JL Audio on Facebook, Instagram or YouTube to learn more about their impressive automotive, marine, and powersport solutions.

This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.

Don’t Put All Your Songs in One Folder on Your USB Drive

With the rise in popularity of digital media files over the last decade, car audio enthusiasts find themselves being more likely to carry a USB memory stick than a stack of compact disks. When it comes to organizing all those MP3, WMA, AAC and FLAC files, most manufacturers suggest that you don’t put all the songs in one folder. Read on to find out why.

How Car Radios Understand USB File Structure

Unlike a computer, your car radio is very limited in its ability to interpret different USB drive formats and the subsequent file structure. Most systems require that the USB drive be formatted using the FAT or FAT32 file format. Some new multimedia receivers can understand NTFS and exFAT file formats, so larger storage devices can be used.

Songs Folder — You have several formatting options. Be sure to choose one that works with the capabilities of your receiver.

Next, you need to maintain a standard long file name format that allows for a total of 255 characters, including the file extension (.mp3, .wma or .flac). An important part of the standard is avoiding command characters such as /, \, *, :, ?, “, <, > and|. These characters may be misinterpreted by the system and result in a file being unreadable, or on extreme cases, cause the system to stop reading subsequent filenames.

Folder Structure and File Limits

In most cases, you are limited to no more than eight folder layers. So, beyond the root folder, you may have subfolders by genre of music, artist name and album name. This configuration is fine as the music is stored four layers deep. It is worth noting that extremely long folder names may, depending on the radio and its available memory, cause problems. We recommend keeping everything as short and efficient as possible.

Different source units have significantly different limits on the total number of tracks they can play and the number of files or subfolders they can interpret. Many radios have a limit of 255 or 999 files or folders per directory and can only detect up to 999 files. Some radios increase this to 5,000 or 9,999 tracks. A few units on the market can read an impressive 65,535 files per folder, and there are a couple with supposedly no limits at all.

Don’t Put All Your Files in One Folder

When you are planning on buying a new radio, it’s worth spending a few minutes to find out whether it will play your music as you have it organized on your USB stick. Some radios won’t randomize songs in different folders, and others are extremely finicky about the total number of files. If you need help choosing a receiver that will sound great and play your digital media collection, drop by your local specialist mobile enhancement retailer and give the radio you have in mind a try!

This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.

How Do Laser Shifter Systems Work?

Sold as a means of preventing police officers from measuring the speed of your vehicle, laser shifter systems are amazing feats of engineering. Laser-based speed measurement guns measure distances very accurately and very quickly. Police use these hand-held guns to pick out a single vehicle in heavy traffic and find out in a split second how fast it’s going. With no time to slow down, a laser shifter system is your only hope of not getting a ticket – assuming you are traveling above the speed limit.

How Do Police Laser Systems Work?

Police laser guns emit a series of narrowly focused light pulses at a target. The system measures the time it takes for those pulses to reflect back to the gun. Knowing the speed of light, the gun can calculate how far away the object is. If the series of pulses arrives back to the gun at an increasingly faster rate, the object is getting closer to the gun. If the time between pulse reflections is slower, the object is moving away. Using calculus (that math you learned in high school but never thought was necessary), the gun can calculate the vehicle speed, often in less than 0.3 of a second.

Laser Shifter — Police laser guns transmit a series of light pulses to determine your distance.

How Do Laser Defusers Work?

The laser defuser system uses a pair (or more) of transceivers on the front (and optionally the rear) of your vehicle to detect the light pulses from the laser gun. The transceivers have IR receivers that are similar to those used to detect signals from your TV remote control. As soon as the system detects a signal, it sets to work analyzing the pattern of pulses to determine what type of laser gun is being used. It compares the pattern to a look-up table and immediately starts broadcasting light pulses that are similar, but not identical, to those it received. This process happens in less time than it takes the gun to measure the vehicle speed. The pattern of confusing light signals and reflections from the vehicle prevents the laser gun from accurately determining your distance or speed.

How Do We Use Laser Defuser Systems?

The key to being able to continue driving without interruption lies in how your laser shifter system is used, more than what it does. As soon as the system detects a signal, you will receive an alert so that you can start to slow down. Once at a safe speed, you can cancel the shifted signal transmission and allow the officer to take a reading.

The speed at which you complete the “slow and cancel” process is crucial to your success. If you lollygag and drive past the officer with the laser signal shifted, he or she will know what you are up to and may choose to follow you.

A smooth but efficient application of the brakes to prevent the nose of the car or truck from dipping, then a subsequent tap on the Mute (or similar) button should take no more than a few seconds. The officer will likely be in the process of taking a second measurement of your vehicle and, if you’ve done your job, will get a reading that won’t raise an eyebrow.

Expert Installation Is Required

One final point we want to highlight is the importance of proper installation. Laser defusers, shifters, sensors, transceivers or whatever you choose to call them require very accurate installation. If they aren’t aligned perfectly and positioned according to manufacturer guidelines, the system may not function properly. Done wrong, your investment in protection will be rendered useless.

As with most premium automotive enhancements, choosing a retailer who has the tools, training and materials to complete the installation properly should take significant precedence over any other aspect of the project. Ask to see examples of their work and, if possible, have a look behind the scenes at how they mount components, run wiring and make connections. If it doesn’t look right to you, it probably isn’t.

Our team asks that you always obey all traffic laws and drive carefully at all times.

This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.

How Does a Police Radar Gun Work?

Police officers in North America have been using radar guns to catch speeders since 1949. This relatively simple technology evolved from military applications before World War II, where long-range installations were the size of a medium-size apartment building. Modern radar guns aren’t quite pocket-sized, but they are easily transportable and can be hand-held or installed permanently in a police vehicle. Let’s look at how a radar gun works.

How Does Speed-Detecting Radar Work?

In simple terms, a radar gun transmits a narrow beam of radio-frequency energy out the front of the gun and looks for that signal to be reflected back to the gun after bouncing off an object. Unlike lidar and laser guns, the speed measurement is calculated by how much the received signal has changed in frequency after reflecting off the moving object. This phenomenon is called a Doppler effect and is the same reason that a car sounds different as it approaches and drives away from you.

Police Radar — Radio frequency signals bouncing off a stationary object are reflected to the source at the same frequency.

Please Explain Doppler Effect to Me!

Imagine that you have a tennis ball machine shooting balls at a stationary object once every second. The balls bounce back to the machine and arrive once per second. If you start to move the object toward the ball launching machine, the balls bounce back faster and faster as the object approaches the machine. This increase in return speed represents an increase in frequency.

If an object is moving away from the tennis ball machine, it will take longer for each ball to bounce back, thus representing a decrease in frequency. The digital signal processor in modern radar guns is configured to analyze the changes in the reflected signal very quickly and display a speed reading in less than a second.

Different Radar Bands

In North America, police officers use radar guns that operate in the X, K and Ka band frequency ranges. X band is the oldest technology and operates between 8 and 12 GHz; the K band is between 18 and 27 GHz; and the Ka band is between 27 and 40 GHz. X band radar is prone to interference from automatic door opening systems. K band (K is short for Kurz, which is the German word for short) and Ka (K-above band) radar are less resistant to atmospheric absorption than X band and less effective over long distances. Most of the new radar guns such as the Stalker II and the Kustom Talon use Ka band signals, so if your detector goes off, you know you need to react right away.

Radar Detectors Provide Early Warnings

Unlike lidar, the radar signal isn’t as precise at long distances, allowing it to spread well beyond the vehicle being measured. The high-sensitivity radar receiver in a radar detector is tuned to pick up extremely low-level signals and alert you that radar is in use. You need to act quickly when a radar detector goes off. Your local specialist mobile enhancement retailer can help you choose the perfect portable or custom-installed radar for your application and ensure that the system is installed cleanly. Drop by and find out what’s available today!

This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.

Product Spotlight: KICKER KEYLOC

There are a dozen or so high-quality line output converters available to help your installer integrate an amplifier into a factory-installed audio system. That said, most of them are simple devices that do nothing more than adjust voltage gain and perhaps apply some equalization to the signal. KICKER’s KEYLOC is a unique solution because it features a built-in digital signal processor that undoes equalization, delays, and all-pass filters applied to the factory signal. The goal is to establish a clean signal that you can build on. Let’s check out the outstanding KICKER KEYLOC.

Basic Features of the KICKER KEYLOC

Let’s start with the basics. The KEYLOC is a two-channel line output converter that can accept up to 10 volts of signal in low-level mode and an impressive 40 volts in high-level mode. In low-level mode, the KEYLOC presents a 60-ohm load to the driving amplifier. Many factory-installed source units and amplifiers will go into protection mode without a proper load. External resistors are available from KICKER if needed for high-level operation. The maximum output of the KEYLOC is 10 volts.

The KEYLOC measures 5.5 by 2.75 inches in footprint and is 1.375 inches thick. A Molex connector on the left side includes two speaker input channels, power and ground connections, and remote turn-on and remote output wiring. The remote output activates automatically when the KEYLOC detects a DC offset voltage on the input speaker wires, enabling an aftermarket amplifier to turn on. There are a pair of RCA output jacks on the right side of the chassis to feed your new amplifier.

The top panel of the KEYLOC features two stereo potentiometers and a display with five LEDs. The pots are for adjusting input sensitivity and output voltage. The LEDs indicate power and are part of the signal testing and KEY processing features of the KEYLOC.

KICKER KEYLOC — The LED display on the front panel of the KEYLOC provides your installer with information about frequency response and correction processing.

Audio Analysis Tool

Depending on the design of your factory audio system, it might be difficult to find a full-range signal. The Low, Mid, and High LEDs on top of the KEYLOC can be used with the provided pink-noise test track to determine whether you have a full-range signal. The Low indicator illuminates when there is sufficient audio information in the 20 Hz to 200 Hz range. The Mid indicator monitors 200 Hz to 2 kHz, and the High LED monitors audio above 2 kHz. If you are missing low- or high-frequency information, the KEY processing will not produce a full-bandwidth signal for your new equipment.

The KEY to Audio Excellence

The KEYLOC uses KICKER’s patent-pending KEY algorithm to analyze a special audio test signal. The signal includes sine sweeps, pink noise, and impulses, which reveal frequency response, signal delay, and all-pass filter processing. Once measured, the KEYLOC applies its own signal processing to eliminate these attributes from the audio signal. The result is a flat frequency response signal that will allow new speakers, amplifiers, and processors to sound amazing. The process is fully automated and takes between two and 10 minutes to complete. Your installer can even temporarily bypass the correction to demonstrate how much the system has improved thanks to the KEYLOC.

Why You Need the KICKER KEYLOC

Factory-installed audio systems are typically designed to extract the best possible performance from inexpensive speakers. As such, radios and amplifiers include signal processing such as equalization, delays, and all-pass filters to create an optimized listening experience. Don’t be fooled: this processing is present even in simple “radio-only” systems and isn’t exclusive to premium systems with complex multi-channel amplifiers.

The goal of upgrading a car audio system is, of course, to make it sound better. As such, you are likely to add subwoofers and new speakers to the vehicle. The equalization that worked with the factory speakers is not likely to be ideal for the higher-performance options you’ve chosen. Eliminating factory processing with a product like the KICKER KEYLOC is crucial to achieving great sound in your car, truck, or SUV. The KEYLOC is also great for motorcycles, side-by-sides, and marine applications.

Visit a KICKER Dealer Today

When it’s time to make your vehicle’s stereo sound better, drop by an authorized KICKER retailer to find out whether the KEYLOC is needed to undo the signal processing built into your factory-installed audio system. You can find an authorized KICKER retailer near you using the Dealer Locator on the KICKER website.

Be sure to follow Kicker on Facebook, Instagram and YouTube to keep up with the latest product releases from our friends in Stillwater.

This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.

Product Spotlight: JL Audio AP600/6

Introducing JL Audio AP Amplifiers

JL Audio AP600/6 Specifications

Connections and Installation

Upgrade Your Marine or Powersports Application with JL Audio AP-Series Marine Amps Today!

Don’t Put All Your Songs in One Folder on Your USB Drive

How Car Radios Understand USB File Structure

Folder Structure and File Limits

Don’t Put All Your Files in One Folder

How Do Laser Shifter Systems Work?

How Do Police Laser Systems Work?

How Do Laser Defusers Work?

How Do We Use Laser Defuser Systems?

Expert Installation Is Required

How Does a Police Radar Gun Work?

How Does Speed-Detecting Radar Work?

Please Explain Doppler Effect to Me!

Different Radar Bands

Radar Detectors Provide Early Warnings

Product Spotlight: KICKER KEYLOC

Basic Features of the KICKER KEYLOC

Audio Analysis Tool

The KEY to Audio Excellence

Why You Need the KICKER KEYLOC

Visit a KICKER Dealer Today

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