MB QUART ONYX OWC254 Manuale utente

ONYX

OWC254 / OWC304

Thank you for choosing the MB Quart ONYX subwoofer for your car audio sound

system. With proper installation, you are on the path to experiencing your music in a

way you only imagined possible. Here at MB Quart, we call this “Sound In Every Detail.”

The ONYX series subwoofers have been designed for the enthusiast looking for

accurate bass and solid reliability in their woofer. The ONYX series subwoofers

feature the following:

- Push & Insert Style Speaker Terminals

- Deep Drawn Stamp Steel Basket

- Heat-Dispersing Vented Pole Plate

- Anti-Resonant Magnet Cover

- Injection Molded Polypropylene Cone

- UV Resistant Butyl Rubber Surround

- 1.5” High Temp Voice Coil

- Red Nomex Spider

OWC254

175-350

25.4 cm / 10” 25.4 cm / 10”

35-250 35-250

175-350

25.4 cm / 10”

35-250

83.96

175-350

25.4 cm / 10”

35-250

83.96

83.96 83.96

175-350

25.4 cm / 10”

35-250

83.96

175-350

25.4 cm / 10”

35-250

83.96

260mm / 10.24”

228mm / 8.98”

118.5mm / 4.67”

130.3mm / 5.13”

OWC304

175-350

35-250

35-250 35-250

84.6

175-350

35-250

84.6

84.6 84.6

175-350

35-250

84.6

175-350

35-250

84.6

30.48 cm / 12”

30.48 cm / 12” 30.48 cm / 12”

30.48 cm / 12”

315.3mm / 12.41”

278mm / 10.94”

139.4mm / 5.49”

153.5mm / 6.04”

OWC254 / OWC304

DVC 4-Ohm Coil Wiring

SERIES COILS

1+ 1-

2- 2+

8-Ohms

SERIES COILS / PARALLEL SUBS

1+ 1-

2- 2+

1+ 1-

2- 2+

2.66-Ohms

1+ 1-

2- 2+

1 2 3

SERIES COILS / PARALLEL SUBS

1+ 1-

2- 2+

1+ 1-

2- 2+

2-Ohm

1 2

1+ 1-

2- 2+

1+ 1-

2- 2+

PARALLEL COILS

1+ 1-

2- 2+

2-Ohms

1+ 1-

2- 2+

SERIES COILS / PARALLEL SUBS

1+ 1-

2- 2+

4-Ohms

1 2

PARALLEL COILS / PARALLEL SUBS

1+ 1-

2- 2+

1+ 1-

2- 2+

1-Ohm

1 2

OWC254 / OWC304

SUBWOOFER INSTALLATION DIRECTIONS

Enclosure Materials

Typically, 5/8” or 3/4” MDF (Medium Density Fiber Board) is best

for most applications. 3/4” MDF is recommended.

Enclosure Build Materials

Connecting joints need to be glued and screwed to ensure no

air escapes and joints do not separate under high pressure.

Mitered and rabbit joints also help to ensure the enclosure joints

are secure.

Bracing

Internal bracing is also recommended to prevent flexing and to

strengthen the enclosure.

Note: The volume taken up by the bracing should be added to the

total enclosure interior volume.

There are two common bracing methods.

1. Corner Bracing: These help prevent the connection joints

from separating under heavy vibration and air pressure.

Use 1” x 1” MDF at all interior joints

2. Diagonal Bracing: These internal braces connect the top side

to the bottom side as well front side to back side. This prevents

the wood from bowing or pushing outwards.

Use 1” x 2” with 1” surface contact that is glued and screwed.

OWC254 / OWC304

Q The energy losses of relative damping (ratio of stored to dissipated

energy or ratio of reactive to resistive energy).

Fs Free air resonance of driver in Hz.

Qms Mechanical Q.

Vas Volume of air equivalent to driver from the rest position.

Cms Mechanical compliance of a loud speaker piston.

Mms Moving mass of total loud speaker piston assembly.

Xmax The maximum linear excursion of a loud speaker.

Sd Surface area of the cone.

Dia The piston diameter of a loud speaker.

Qes Electrical Q of a system.

Re DC resistance.

Le VC inductance.

Pe Maximum input power.

Qts Total Q of the system.

Sens Sensitivity. An efficiency measurement in dB’s.

Vc Volume of a closed or sealed enclosure

Vb Volume of a vented enclosure.

Fc The resonant frequency of a closed or sealed system

Fb The resonant frequency of a vented system

F3 The half-power (-3dB) frequency of a loud speaker enclosure

Qtc The Q of a loud speaker at Fc in a closed box, considering both

it’s electrical and mechanical resistance.

QL The Q of a vented box, resulting from all box losses.

DV Diameter of vent.

LV Length of vent.

H Height.

W Width.

D Depth

Glossary of Terms

OWC254 / OWC304

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