INSTALLATION INSTRUCTIONS

Settings for Best Performance

General:

At this point you are ready to get more specific on the settings for your amplifier.

High Pass:

-When in Hi Pass operation, this setting acts as a low frequency cut off for your system reproduction. The point that you set it at cuts off any frequencies from reproduction beyond this point. The 12 o’clock position is a great starting point. EXAMPLE: If you adjust the High Pass to 100Hz, the amplifier will not play frequencies below 100Hz but will play frequencies from 100Hz to the chosen Low Pass frequency.

-When in Low Pass/Bandpass operation, this setting acts as a low frequency cut off for your system reproduction aka Subsonic Filter. The point that you set it at cuts off any frequencies from reproduction beyond this point. The 12 o’clock position is a great starting point. EXAMPLE: If you adjust the High Pass to 25Hz, the amplifier will not play frequencies below 25Hz but will play frequencies from 25Hz to the chosen Low Pass frequency.

-When in Flat/Full operation, the High Pass crossover is bypassed.

Bass EQ:

This setting is a fixed bass boost at 45Hz that is variable from 0-6dB. This feature provides impact to your bass, but if not adjusted correctly, it can be over used and cause damage to your speakers and amplifiers. It is best to slowly turn this setting clockwise until the desired punch is felt. It is not recommended to exceed the 12 o’clock position unless listening at a low volume or a low recording quality as this can result in high distortion and possibly clipping.

Low Pass:

The Low Pass control acts as a ceiling and doesn’t allow frequencies to the right of the desired setting to be reproduced. Turning the potentiometer all the way to the right is a great starting point. EXAMPLE: If you adjust the Low Pass to 120Hz, the amplifier will not play frequencies above 120Hz but will play frequencies from 120Hz to the chosen Hi Pass or Subsonic frequency.

-When in Hi Pass operation, this setting is bypassed.

Level Control Setup:

Ensure that the Level is turned completely to the left prior to turning the system on. Next you should insert a CD or cassette that you are familiar with to use as a reference, and turn the head unit volume control to about 80% of its full setting. The system sound level will of course be very low, and the following procedures will help you to match the amplifier input sensitivities properly to the head unit output signal level.

It is important to match the amplifier LEVEL input sensitivity to the Radio/CD output sensitivity. This can be located in the Radio/CD manual. If the Radio/CD output sensitivity is 2 volts, then adjust the amplifier LEVEL input to 2 volts.

If you are not sure what the Radio output sensitivity is, follow these general guide lines:

Turn the level control up slowly, till you hear distortion, then back off a few degrees on the control. If at any point your amplifier goes into protection, you will need to turn the Level to the left a bit and then try again. If you reach a point where the output does not increase, stop turning the Level control to the right as the amplifier/speaker combo has reached its maxx output in this application.

2 or 3 way active systems (all):

Always start with the bass, or low frequency amplifier as a reference, by turning its control up to the point where distortion is audible, and back it off some. Now adjust the level control for the highs or tweeter channels in a 2 way active system, to balance the highs to lows.

In a 3 way active system, match the midrange level to the bass, and then the highs to the midrange and bass. It may be necessary to perform a few iterations of the midrange and highs level control settings to achieve a satisfactory sound balance.

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MB QUART NAU660, NAU260, NAU460 installation manual Settings for Best Performance
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NAU460, NAU660, NAU260 specifications

MB Quart has long been synonymous with high-performance audio systems, and their NAU series—specifically, the NAU660, NAU460, and NAU260—continues this legacy. Each model in the NAU series is engineered to provide superior sound quality and robust performance, making them ideal choices for car audio enthusiasts and home audio applications alike.

The NAU660 is the flagship model of the series, featuring a powerful power output of 600 watts. This model is designed to deliver crystal-clear sound across a wide frequency range, ensuring that every note and beat is faithfully reproduced. The NAU660 includes advanced Class D amplification technology, which not only enhances sound efficiency but also reduces heat generation, leading to increased longevity of the unit.

Next in line is the NAU460, which offers a balance between performance and affordability. With a power output of 400 watts, this model doesn't compromise on sound quality. It features high-quality components, including custom-engineered driver elements designed to deliver deep bass and clear highs. The NAU460 is particularly suitable for users looking to upgrade their factory audio systems without breaking the bank.

Lastly, the NAU260 is a versatile model that caters to compact car audio setups. With a power output of 260 watts, it is designed for urban drivers who want a quality audio experience without the bulk. Despite its smaller size, the NAU260 boasts impressive sound reproduction with enhanced bass response, making it perfect for modern music genres.

All three models feature user-friendly controls, allowing for easy adjustments to suit individual listening preferences. The sleek design ensures that they seamlessly integrate into any audio setup, whether in a vehicle or a home theater system. Additionally, these models incorporate various protection circuits to safeguard against overheating and short circuits, ensuring safe operation during extensive use.

The MB Quart NAU series is equipped with high-pass and low-pass crossover technologies, enabling users to optimize frequency output based on speaker configurations. This feature enhances the overall audio experience, ensuring that the right frequencies reach the right speakers.

In summary, the MB Quart NAU660, NAU460, and NAU260 each deliver impressive audio performance, tailored to meet the varying needs of audio enthusiasts. With advanced technology and robust design, these models exemplify MB Quart's commitment to innovation in sound quality. Whether for everyday use or a high-performance system, the NAU series stands out as a reliable choice.
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