Here are some basic questions and answers that will help you determine your LOC needs and lead you down the path to a proper sound upgrade. Do you need just the basic? LOCs are the original integration pieces in car audio. The most basic ones are passive devices. These units have been around since aftermarket car audio became a viable market. Do you need a signal sense 12 volt turn on output?
More advanced versions of the LOC include models that can detect input signal and create a remote output to turn on an aftermarket amplifier or other device. Line Output Converters Line output converters LOCs are used to convert a head unit's speaker outputs or the outputs of an OEM amplifier into a signal suitable to drive the preamp inputs of an amplifier. Most line output converters LOCs used in the past few years are designed for high output head units. The speaker output of a high powered head unit is designed to operate in a bridged configuration.
The speaker wires from the head unit each have half of the DC battery voltage on them when the head unit is on. When the head unit is off , the voltage on the output wires is 0 volts DC. Construction: First, let's look at the most basic line output converter.
This one acts as a voltage divider covered on the Resistors page to simply reduce the signal level. These can work on some OEM amplifiers but should probably be avoided for most installs. These have no transformers so they cannot provide any isolation and cannot effectively block the pulse of DC that DC biased amps will have.
The high-power line output converter is better suited for those. A high powered line output converter consists, primarily, of a transformer and often a high power resistor commonly a10 watt resistor. The resistor is used to load the amplifier in the head unit. Some amplifiers will exhibit less than ideal manners when they are unloaded.
Remember that we said that the head unit's outputs had a large quick increase in DC voltage when the head unit is switched on.
The transformer will pass the difference in voltage between the two input terminals. Since the DC voltage increases simultaneously on both of the input terminals of the line output converter and therefore the transformers in the converter , the pulse of DC is canceled out.
If the line output converter simply used resistors as a voltage divider with no transformer , the turn on pop would be severe for most amplifiers. Another benefit of using transformers in the converter is that it allows the shield ground on the output of the converter to float. This means that it can be grounded to any point in the vehicle and there will be no chance of creating a ground loop between the output shield ground and the head unit's ground.
These require 12v power to output a signal. These converters also handle up to watts per channel meaning OEM Amplified systems and high powered systems are not an issue. They also lend themselves to having better sound quality output plus they have additional features like Bass restoration, line driver capabilities, remote turn on, channel summing in select models.
Fine for a factory audio system but you want your new speakers and amplifier to sing! Line driver capabilities AudioControl LC products have a high powered, low noise pre-amplifier which will feed up to 8.
Channel summing capabilities Factory audio systems can be more complicated than you think, with separate tweeter and mid-bass driver outputs from amplifiers, picking up signals from your factory audio system can be confusing for some of the best of us.
AudioControl LC products feature channel summing capabilities which are where your tweeter and mid-range signals are fed into the Active Line Out Converter and turned into a full range signal. GTO is a system that automatically turns on the AudioControl product when it detects the presence of a signal on the main input. This eliminates the hunt for a turn on wire for the AudioControl line out converter and your aftermarket amplifiers.
0コメント