MartinLogan Installer Series Manual de usuario

ML-300

user’s manual

Table of Contents

Important Operating Instructions: Read Before

Operating Subwoofer

Subwoofer Assembly Parts List (one subwoofer)

• 1 subwoofer with mounting bracket attached

• 1 mounting template

• 1 paint mask

• 1 wire tie

Required, not included

• 1 MartinLogan Amplifier ML-300 (for use with up to 2 MartinLogan ML-300 subwoofers)

Important Operating Instructions: Read Before Operating Subwoofer. . . . . . . . . . . 2

Subwoofer Assembly Parts List ....................................2

Safety Warning and WEEE Recycling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Your New Subwoofer .........................................4

The Listening Room ...........................................4

Guidelines for Deciding on Subwoofer Placement . . . . . . . . . . . . . . . . . . . . . . . 5

Subwoofer Placement .........................................5

Color Match Painting .........................................6

Installation into a Wall Without a Backbox (Pictorial) . . . . . . . . . . . . . . . . . . . . . 7

Installation into a MartinLogan Backbox (Pictorial) . . . . . . . . . . . . . . . . . . . . . . . 8

Installation into a Wall Without a Backbox . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Frequently Asked Questions.....................................11

Troubleshooting.............................................11

Warranty ................................................12

Service ..................................................12

Specifications..............................................13

Dimensional Drawings ........................................14

Subwoofers covered by this manual are designed for use with a MartinLogan

ML-300 Subwoofer Amplifier only. Using this subwoofer with any other brand

of amplifier may cause permanent damage and will void the warranty.

NOTE: For even better performance, two ML-300 subwoofers may be used. Refer

to info on page 5 and 6.

Safety Warnings and WEEE Recycling

The lightning bolt flash with arrowhead symbol within an equilateral triangle is

intended to alert the user to the presence of uninsulated “dangerous voltage”

within the product’s enclosure that may be of sufficient magnitude to constitute

a risk of electric shock.

The exclamation point within an equilateral triangle is intended to alert the

user to the presence of important operating and maintenance (servicing)

instructions in the literature accompanying the appliance.

The fire within an equilateral triangle is intended to alert the user to the poten-

tial of creating a fire hazard if they do not follow the instructions.

The dollar sign within an equilateral triangle is intended to alert the user that

they run the risk of causing damage that could be potentially expensive to

repair if they don't follow the instructions.

WARNING!

• Refer servicing to a qualified technician.

• To prevent fire or shock hazard, do not expose this module to moisture.

• Turn amplifier off should any abnormal conditions occur.

• Do not drive speaker beyond its rated power.

In accordance with the European Union WEEE (Waste Electrical and Electronic

Equipment) directive effective August 13, 2005, we would like to notify you

that this product may contain regulated materials which upon disposal, accord-

ing to the WEEE directive, require special reuse and recycling processing.

For this reason MartinLogan has arranged with our distributors in European Union

member nations to collect and recycle this product at no cost to you. To find your local

distributor please contact the dealer from whom you purchased this product, email

info@martinlogan.com or visit the distributor locator at www.martinlogan.com.

Please note, only this product itself falls under the WEEE directive. When dis-

posing of packaging and other related shipping materials we encourage you

to recycle these items through the normal channels.

Your New Subwoofer

Break-In

When you first begin to play your subwoofer, it may sound a bit bass shy. This is due

to the high quality, long-life components used in the driver. Allow approximately 72

hours of break-in at 90 dB (moderate listening levels) before any critical listening.

Cleaning

Clean subwoofer housing with a soft, damp cloth. Do not use a strong or abrasive

cleaner or get any part of the subwoofer wet.

If you wish to paint your subwoofer you must do so before installing it. See the section

on ”Color Match Painting” (page 6) for full details.

Optional MartinLogan Backbox

The MartinLogan in-wall subwoofer can also be installed into an optional MartinLogan

back box (sold separately). If you decide to use a backbox, follow the instructions for

placement and installation included with the box.

MartinLogan in-wall subwoofers are suitable for use in a wide variety of listening

environments. Note however, that room construction, dimensions and furnishings all play

a part in the quality of sound you ultimately achieve. Try to follow these guidelines:

a) Strong, rigid walls are preferred for best bass balance. For even better results we

recommend adding additional bracing and acoustic damping material to the cavity

prior to installation. See section on ”Subwoofer Installation” later in this manual for

more details.

b) It is important to note that just as the amount of soft furnishings has a decided impact

on mid and high frequencies, those frequencies below 150 Hz are dramatically

affected by the room itself—its size, shape, as well as the physical boundaries of

the room.

The extra care you take in correctly positioning your subwoofers will result in greater

listening enjoyment. Follow the guidelines for placement below to achieve optimal sound

in your room.

The Listening Room

When considering subwoofer placement directly into a wall, keep the following in mind:

• DO NOT install subwoofers into lath or plaster—over time, the bass vibrations will

cause material to crack;

• DO NOT install subwoofers into cavities that contain ductwork;

• DO NOT locate subwoofers close to wall-mounted fixtures that may vibrate (remember

to check the other side of the wall too!);

• DO NOT install subwoofers in a cavity that already contains an in-wall speaker;

• If installing in a wall with metal studs, make sure studs are securely fastened so that

they do not vibrate or rattle;

• Some acoustic bleed-through into the adjacent room is unavoidable. See section

on ”Subwoofer Installation” for suggestions to reduce bleed-through.

Subwoofer Placement

Although not required, you will achieve best results using MartinLogan in-wall subwoofers

in pairs. Using a pair of subwoofers will allow you to randomize the standing waves

within your listening room so that bass is distributed in a more uniform manner. Two

subwoofers also ensures even lower distortion, especially at high output levels.

Bass is less and less directional as it goes down in frequency. For best sonic integration,

placing one subwoofer in the wall at the front of the room and the other in the wall at

the rear usually provides the best performance and sonic integration. If this location

is not possible, keeping in mind the guidelines provided earlier, you may place your

subwoofers anywhere in the wall without affecting the stereo image of your front speakers

or the soundstage of your multichannel speaker system.

Figure 1a & 1b: highlight how bass output is generally affected by placement. When

seated in the typical listening area of your room, placing the subwoofers in the various

positions will typically result in bass performance as follows:

Fig. 1a: Corner placement close to the floor provides the best balance of output and

accuracy.

Fig. 1b: Along a Wall: Placement anywhere along the walls close to the floor, but

outside the “shaded” area will provide slightly reduced output, though still acceptable

accuracy.

If desired, for further optimized bass performance and even greater output, you can install

an additional pair of MartinLogan in-wall subwoofers. Figure 2 provides recommended

placement for four subwoofers.

Guidelines for Deciding on Subwoofer Placement

Fig. 1b Two subwoofers close to floor in middle

of walls

Fig. 1a Two subwoofers close to floor in corners

of room

Broken lines in figures represent alternate placement for a pair of subwoofers

Fig. 2 Recommended placement for four subwoofers

Color Match Painting (optional)

Your new subwoofer has a textured finish in neutral white to blend into any area. They

may also be painted to match any décor. If you plan to paint your subwoofers, to avoid

“painting them to the wall”, we recommend that you paint before installation.

Please note:

• Do not paint the surface behind the grilles;

• Do not heat-cure your newly painted subwoofers;

• Avoid painting the rear of the subwoofers—protect by masking (paint mask included).

To Paint, Follow These Steps:

1) Remove the metal grille and position the paint mask (included) in its place.

2) In a well-ventilated area, apply several light coats of paint, letting the subwoofer

housing dry completely between coats. Follow the paint manufacturer’s directions.

3) When painting grille, be careful not to plug holes with paint and re-attach after paint

has dried. It is easier to spray the grille than to use a brush. Remove protective cloth

(if included). Remove grille before painting.

Installation Into A Wall Without A Backbox

Fig. 3a

Connect subwoofer as outlined in the Owners Manual included with your MartinLogan

subwoofer amplifier.

Fig. 3b

Fig. 3c

a) Holding the subwoofer’s front lip

with your thumbs and index fingers,

push the mounting screws toward

each other with your other fingers,

so the mounting brackets can fit

through the hole with an “up-and-in”

motion. Release the screws and

gently push the subwoofer into the

backbox.

b) Tighten screws.

INSTALLING GRILLE

Installation Into A Wall With A Backbox

Connect subwoofer as outlined in the MartinLogan Subwoofer Amplifier instructions

and MartinLogan Backbox connection instructions.

IMPORTANT! If installing a subwoofer into a backbox.

Instructions for installing your subwoofer into a backbox were provided with the backbox.

If you no longer have the instructions, follow the instructions on the preceding page.

Stiffening and Strengthening the Cavity

Although MartinLogan in-wall mounting systems are some of the most rigid on

the market, when installing your subwoofer directly into a wall to help avoid bass

vibrations and minimize acoustic bleed-through, we recommend the following:

• Additional cross-bracing will further stiffen the cavity. Without substantially reducing

the size of the cavity, we suggest placing two to three pieces of 2˝ x 4˝ stud within

the cavity, evenly spaced above and below the cutout. Additional bracing can

also be sandwiched to the studs/joists on either side of the subwoofer.

• New construction offers an excellent opportunity to strengthen and stiffen the

cavity with additional bracing or construction-grade stiffening adhesives applied

directly to the drywall. (See Dealer for more information.)

1. Mounting

Keeping in mind the recommendations above, place mounting template onto wall.

Cut hole as indicated in Fig. 3a.

Damping Material and Other Acoustic Treatments

To ensure optimal results, do not compact damping material during the damping

process described below. Additional soundproofing treatments (see Dealer for more

information) can be used against the back wall of the cavity or above and below the

cutout on the inside front of the wall.

For optimum performance, loosely place a minimum of…

• Two pieces, 8˝ (20 cm) to 12˝ (30 cm) long, of standard fiberglass insulation

in the wall. R-12 for 2˝ x 4˝ (5 cm x 10 cm) walls or R-20 for 2˝ x 6˝ (5 cm x

15 cm) walls. Place one piece just above and just below the mounting hole;

• A half-thick piece of fiberglass insulation, the same height as the subwoofer,

in the wall directly behind the mounting hole, allowing enough space for the

subwoofer to properly recess into the cavity.

Installation Into A Wall Without A Backbox

2. Connecting and Installing

You are now ready to connect and install the subwoofers. If you are color match

painting do so now before proceeding. Follow painting instructions provided

earlier.

With grille removed and bracket attached to speaker, place subwoofer against wall

and follow the directions below.

Connecting Subwoofer:

Connect subwoofer cable as outlined in the Owners Manual

included with your MartinLogan subwoofer amplifier (sold

separately). Once connected, follow directions below.

Installing Subwoofer:

a) Holding the subwoofer’s front lip with your thumbs and index fingers, push the

mounting screws toward each other with our other fingers, so the mounting brackets

can fit through the hole with an “up-and-in” motion. (Fig.3b)

b) Release the screws and gently push the subwoofer into the wall;

c) Alternately tighten all screws until subwoofer is firmly installed. (Fig. 3c)

3. Installing the Grille

Press the grille into the groove on the front face of the speaker (not shown).

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