QSW3 - Loudspeaker MB QUART - Free user manual and instructions

Product Type	Car Audio Subwoofer
Model	QSW3
Brand	MB Quart
Peak Power Handling	500W
RMS Power Handling	250W
Impedance	4 ohms (single voice coil)
Sensitivity	90 dB @ 1W/1m
Frequency Response	20 Hz - 200 Hz
Woofer Size	12 inches (30 cm)
Cone Material	Polypropylene with rubber surround
Mounting Depth	5.5 inches (140 mm)
Mounting Hole Diameter	11.25 inches (286 mm)
Overall Diameter	12.5 inches (318 mm)
Weight	5.2 kg (11.5 lbs)
Recommended Enclosure Volume (Sealed)	1.25 cubic feet (35 L)
Recommended Enclosure Volume (Ported)	2.0 cubic feet (57 L)
Ported Tuning Frequency	35 Hz
Voice Coil Diameter	2 inches (50.8 mm)
Magnet Weight	80 oz (2.27 kg)
Safety Precautions	Do not expose to moisture; keep out of reach of children; ensure proper mounting to avoid injury
Maintenance	Clean with a dry microfiber cloth; avoid harsh chemicals
Warranty	1 year manufacturer warranty
Parts & Repairability	Contact MB Quart support for replacement parts; recone kits available

Frequently Asked Questions - QSW3 MB QUART

How do I connect the QSW3 subwoofer to my amplifier?

Use a 4-ohm compatible amplifier. Connect the positive terminal of the sub to the positive output of the amp, and the negative to negative. If using multiple subs, ensure total impedance matches the amp's specifications.

What is the RMS power rating of the QSW3?

The QSW3 has an RMS power handling of 250W. It is recommended to use an amplifier delivering between 200W and 300W RMS for optimal performance.

What size enclosure do I need for the QSW3?

For a sealed box, use 1.25 cubic feet. For a ported box, use 2.0 cubic feet tuned to 35 Hz. Actual volume may vary slightly depending on vehicle and personal preference.

Can I use the QSW3 in a sealed enclosure?

Yes, the QSW3 works well in a sealed enclosure. A sealed box will provide tight, accurate bass with a smooth roll-off. Recommended volume is 1.25 cubic feet.

What is the mounting depth of the QSW3?

The mounting depth is 5.5 inches (140 mm). Ensure your enclosure has sufficient depth to accommodate the subwoofer without obstruction.

How do I clean the QSW3 subwoofer?

Gently wipe the cone and surround with a dry microfiber cloth. Avoid using water or cleaning products, as they may damage the materials. Keep the subwoofer away from dust and moisture.

What is the impedance of the QSW3?

The QSW3 has a single 4-ohm voice coil. When wiring to an amplifier, ensure the total impedance load is within the amp's stable range (e.g., 4 ohms for one sub, 2 ohms for two subs in parallel).

What gauge wire should I use for the QSW3?

For runs up to 10 feet, use 12 AWG speaker wire. For longer runs, use 10 AWG to minimize power loss. Ensure connections are tight and secure.

Is the QSW3 compatible with my car's factory stereo?

The QSW3 requires an external amplifier, as factory stereos usually lack enough power. Use a line output converter (LOC) if your stereo has no RCA outputs. Ensure the amplifier's input sensitivity matches the stereo's voltage.

Does the QSW3 come with a protective grille?

The QSW3 typically does not include a grille. To protect the subwoofer from physical damage, consider purchasing an aftermarket grille or mounting it in a location where it is not exposed to direct impact.

USER MANUAL QSW3 MB QUART

Product display of MBQUART speakers and electronic components (no visible text or symbols)

The first step of installing a speaker system is thorough planning. Choose a suitable location for your speaker components carefully. Follow these suggestions to ensure proper imaging and maximum performance:

1. Choose a location that offers the least amount of obstruction between the components and your ears. Pay also attention to the position of the seats, headrests and other constructional systems in the interior space of the car.
2. Try to mount the speakers on the same arrangement. They should be installed at the same height and directly across from each other. Do not mount one speaker higher, lower, further forward or further backward from the opposite speaker.
3. The tweeter should always be installed as close as possible to the midrange and bass speaker.
4. Always take a look behind the chosen mounting locations to ensure that there is proper clearance for the rearside of the speakers and avoid obstructions such as window tracks, wire harnesses, gas tank etc.
5. Maximum performance is achieved when the speaker is securely mounted to a door panel or rear speaker deck. There should be no gaps between the speaker basket and the mounting surface
6. Please handle the components with care, otherwise they will get damaged.
7. Please pay attention to the correct polarity (+ or -) for all terminals and connections.
8. Never connect the speakers to the electrical ground or with the body of the vehicle.

WARRANTY

This MB Quart product has a 3-year warranty from date of purchase.

To maintain your warranty coverage upright, keep your original purchase receipt to prove the date of purchase. Any damage of the product, based on incorrect or improper use, accident, incorrect and improper installation, modification of the barcode, natural disaster or any non-appropriate interventions, repairing or alteration outside our factory or authorized service centers, and caused by other acts, which are unauthorized, because have been made in an incompetent manner, is excluded from the warranty. This warranty is limited only to defective parts and especially excludes all incidental or consequential damages and those who are associated with.

Please return the defective product along with a copy of your purchase receipt and a detailed malfunction description to the dealer from whom you purchased the product.

SPECIFICATIONS QS75

• 7,5 cm (3") Midrange-Speaker
  • 60 Watts/RMS, 120 Watts/MAX
• Impedance 4 Ohms
  • Frequency Response 400 - 5000 Hz

• Aluminum cover grille
• 6dB Bandpass In-Line Crossover
- Mounting Diameter 73 mm
- Mounting Depth 41 mm

WIRING DIAGRAM QS75

IMPORTANT:

Please pay attention to the correct polarity (+ or -) for all terminals and connections.

The loudspeakers must be operated with the supplied in-line crossover. If you are running the loudspeakers active with an amplifier, note the recommended frequency values for the setting of the filters:

500-600 Hz, 12 dB for high-pass and 3000 Hz, 12 dB for low-pass.

WIRING DIAGRAM QSW3 WITH QS75

IMPORTANT:

Please pay attention to the correct polarity (+ or -) for all terminals and connections. The midrange speakers and tweeters must must be operated with the CSW3 crossover.

QUARTS

MBQUART

GERMAN AUDIO TECHNOLOGY

Distribution: Audio Design GmbH

Am Breilingsweg 3 · D-76709 Kronau/Germany

Tel. +49 7253 - 9465-0 · Fax +49 7253 - 946510

www.audiodesign.de

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