Setting the Unit

What’s what

Front side

Rear side

To adjust the switch, use a flathead screwdri- ver if needed.

1Power indicator

The power indicator lights up to indicate power ON.

2GAIN (gain) control

Adjusting gain controls CHANNEL A (chan- nel A) and CHANNEL B (channel B) helps align the car stereo output to the Pioneer amplifier. Default setting is the NORMAL position.

If output remains low, even when the car stereo volume is turned up, turn controls to lower level. If distortion occurs when the car stereo volume is turned up, turn these con- trols to higher level.

!If using only one input plug, set the gain controls for speaker outputs A and B to the same position.

!For use with an RCA equipped car stereo (standard output of 500 mV), set to the NORMAL position. For use with an RCA equipped Pioneer car stereo, with max.

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02

output of 4 V or more, adjust level to

English

 

match that of the car stereo output.

 

3LPF (low-pass filter)/HPF (high-pass fil- ter) select switch

Switch the settings based on the connected speaker.

!When the Subwoofer is connected: Select LPF. This eliminates high range frequency and outputs low range fre- quency.

!When the full range speaker is con- nected:

Select HPF or OFF. HPF eliminates low range frequency and output high range frequency. OFF outputs the entire fre- quency range.

4INPUT SELECT (input select) switch

Select 2CH for two-channel input and 4CH for four–channel input.

Setting gain properly

!Protective function included to prevent malfunction of the unit and/or speakers due to excessive output, improper use or improper connection.

!When outputting high volume sound etc., this function cuts off the output for a few seconds as a normal function, but output is restored when the volume of the head unit is turned down.

!A cut in sound output may indicate impro- per setting of the gain control. To ensure continuous sound output with the head unit at a high volume, set amplifier gain control to a level appropriate for the preout maximum output level of the head unit, so that volume can remain unchanged and to control excess output.

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Pioneer GM-6400F owner manual Setting the Unit What’s what, Setting gain properly
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GM-6400F specifications

The Pioneer GM-6400F is a versatile four-channel power amplifier designed to provide a significant boost in sound quality and performance for car audio systems. This robust amplifier is engineered to enhance your listening experience by delivering clear and powerful audio reproduction.

One of the main features of the GM-6400F is its impressive power output. With a maximum power of up to 640 watts, this amplifier is capable of driving multiple speakers without distortion, ensuring that every note and beat is delivered with precision. The GM-6400F can deliver 75 watts RMS per channel at 4 ohms, making it suitable for a wide variety of speakers, and produces a punchy and dynamic sound that can fill any vehicle.

Additionally, the amplifier incorporates advanced Class D technology, which contributes to its efficiency and compact size. Class D amplifiers are known for generating less heat compared to traditional Class AB amplifiers, allowing the GM-6400F to utilize a smaller chassis without sacrificing power or performance. This enables easier installation in tight spaces without compromising sound quality.

The GM-6400F also features a built-in low-pass filter that allows users to tailor the sound to their preference. This filter can be adjusted to focus on specific frequencies, making it easier to blend with subwoofers or enhance specific elements of the audio mix. Furthermore, the amplifier provides a variable bass boost which can add extra thump to low frequencies for those who desire a more pronounced bass experience.

With its durable construction, the Pioneer GM-6400F is built to endure the rough conditions of a mobile environment. The amplifier’s sleek design ensures not just performance but also aesthetic appeal, making it a great addition to any audio setup. An easy-to-read LED indicator on the front panel helps monitor the amplifier’s status without the need for complex diagnostics.

Overall, the Pioneer GM-6400F is an exceptional choice for car audio enthusiasts seeking a powerful yet efficient amplifier. Its combination of advanced technology, user-friendly features, and robust build quality makes it a top contender for enhancing sound in any vehicle audio system. Whether you’re listening to your favorite music or experiencing cinematic sound effects, the GM-6400F is designed to elevate your auditory experience on the road.
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