MartinLogan MO20IGB Manuel utilisateur

2

The lightning bolt flash with arrowhead

symbol, within an equilateral triangle,

is intended to alert the user to the pres-

ence of potentially “dangerous voltage” within the

product’s enclosure that may be sufficient to consti-

tute a risk of electric shock.

Le symbole de l’éclair avec une pointe en

forme de flèche, dans un triangle équila-

téral, avertit l’utilisateur de la présence

d’une « tension dangereuse » potentielle près du produit

qui peut être suffisante pour constituer un risque de

décharge électrique.

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 dispos-

al, according to the WEEE directive, require special

reuse and recycling processing. For this reason Martin

Logan has arranged with our distributors in European

Union member nations to collect and recycle this prod-

uct at no cost to you.

To find your local distributor please contact the

dealer from whom you purchased this product, email

[email protected] or visit the distributor locator at

www.martinlogan.com.

Please note, only this product itself falls under the

WEEE directive. When disposing of packaging and

other related shipping materials we encourage you

to recycle these items through the normal channels.

En vertu de la directive WEEE de l’Union euro-

péenne (directive sur les déchets électriques

et électroniques) entrée en vigueur le 13 août

2005, nous vous avisons que ce produit pourrait con-

tenir des matériaux réglementés dont l’élimination doit

faire l’objet de procédures de réutilisation et de recyclage

particulières. À cette fin, MartinLogan a demandé à ses

distributeurs dans les pays membres de l’Union europée-

nne de reprendre et de recycler ce produit gratuitement.

Pour trouver le distributeur le plus près, communiquez

avec le revendeur du produit, envoyez un courriel à

[email protected] ou consultez le site Web martin-

logan.com.

Notez que seul le produit est régi par la directive

WEEE. Nous vous encourageons à recycler les maté-

riaux d’emballage et autres matériaux d’expédition

selon les procédures normales.

The exclamation point within an equi-

lateral triangle is intended to alert the

user to the presence of important oper-

ating and maintenance (servicing) instructions in the

literature accompanying the appliance.

Le point d’exclamation dans un trian-

gle équilatéral avertit l’utilisateur de la

présence de directives importantes en

matière de fonctionnement et d’entretien (service)

dans les documents qui accompagnent l’appareil.

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.

AVERTISSEMENT!

• Pour les réparations, faites appel à

un technicien compétent.

• Pour éviter les risques d’incendie ou

de décharge électrique, n’exposez pas ce mod-

ule aux vapeurs d’eau ni à l’humidité.

• Veuillez éteindre l’amplificateur en cas de condi-

tions anormales.

•

Ne poussez pas l’enceinte au-delà de sa puissance nominale.

3

Connection ............................ 8

Single Wire Connection

(Motion 30i/15i) ..................8

Single Wire Connection

(Motion 60XTi/50XTi/40i/35XTi/20i) ....9

Bi-Wire Connection

(Motion 60XTi/50XTi/40i/35XTi/20i) ....9

Jumper Clips

(Motion 60XTi/50XTi/40i/35XTi/20i) ....9

Passive Bi-Amplification

(Motion 60XTi/50XTi/40i/35XTi/20i) ....9

Active Bi-Amplification ................10

Assembly and Placement ................ 11

Break In .........................11

Placement ........................11

Toe-In ..........................12

Installing the Grill Covers ..............12

Solid Footing

(Motion 60XTi/40i/20i) ............12

Installting On A Flat Surface

(Motion 50XTi/35XTi/30i/15i) .......13

Vertical Dispersion

(Motion 50XTi/30i) ................13

Frequently Asked Questions .............. 14

Troubleshooting ....................... 14

Contacting Customer Service ............14

General Information .................... 15

Warranty Information ................15

Serial Number .....................15

Service .........................15

Specifications ......................... 16

Dimensional Drawings .................35

Serial Number:_____________________________

Record your serial number here for easy reference.

You will need this information when filling out your

warranty registration. The serial number is located

near the binding posts and on the product carton.

Raccordement .......................... 22

Raccord à Un Fil

(Motion 30i/15i) .................22

Raccord à Un Fil

(Motion 60XTi/50XTi/40i/35XTi/20i) ...22

Raccord à Deux Fils

(Motion 60XTi/50XTi/40i/35XTi/20i) ...23

Pinces de Démarrage

(Motion 60XTi/50XTi/40i/35XTi/20i) ...23

Bi-Amplification Passive

(Motion 60XTi/50XTi/40i/35XTi/20i) ...23

Bi-Amplification Active ................24

Montage et Positionnement ................ 25

Rodage .........................25

Positionnement .....................25

Orientation .......................26

Installation des Couvercies de Grille ......26

Base Solide

(Motion 60XTi/40i/20i) ............26

Installation Sur Une Surface Plane

(Motion 50XTi/35XTi/30i/15i) .......27

Dispersion Verticale

(Motion 50XTi/30i) ................27

Foire Aux Questions ..................... 28

Dépannage. . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Communiquer Avec Le Service à La Clientèle ...28

Renseignements Généraux ................ 29

Renseignements Sur La Garantie .........29

Numéro de Série ...................29

Service .........................29

Spécifications .......................... 30

Plans Dimensionnels ..................35

Numéro de Série :__________________________

Veuillez inscrire votre numéro de série ici pour pou-

voir vous y référer facilement. Vous aurez besoin

de ce renseignement lorsque vous remplirez votre

enregistrement à la garantie. Le numéro de série

est situé près des bornes de raccordement et sur

l’emballage du produit.

4

x4

x2

x1

4mm

x4

x2

Motion 60XTi Motion 40i / 20i

Motion 40 only /

Motion 40 seulement

5

x2

x4

Motion 50XTi

x4

Motion 30i

6

x4

Motion 15i

x2

x4

Motion 35XTi

7

user’s manual

8

WARNING! Turn your amplifier

off before making or breaking any

signal connections!

Use the best speaker cables you can. The length

and type of speaker cable used in your system will

have an audible effect. Under no circumstance

should a wire of gauge higher (thinner) than #16

be used. In general, the longer the length used, the

greater the necessity of a lower gauge, and the

lower the gauge, the better the sound, with dimin-

ishing returns setting in around #8 to #12.

A variety of cables are available whose manufactur-

ers claim better performance than standard heavy

gauge wire. We have verified this in many cases,

and the improvements available are often more

noticeable than the differences between wires of dif-

ferent gauge. The effects of cables may be masked

if equipment is not of the highest quality.

Connections are done at the signal input section

on the rear electronics panel of the speaker. Use

spade connectors for optimum contact and ease

of installation. Hand tighten the binding posts, but

do not overtighten—do not use a tool to tighten the

binding posts.

Be consistent when connecting the speaker cables

to the signal input terminals. Take care to assign

the same color cable lead to the (+) terminal on

both the left and right channel speakers. If bass is

nonexistent and you cannot discern a tight, coher-

ent image, you may need to reverse the (+) and

(–) leads on one speaker to bring the system into

proper polarity.

SINGLE WIRE CONNECTION

(MOTION 30i/15i)

Connect the (+) wire from your amplifier to either

red (+) binding post and the (–) wire from your

amplifier to either black (–) binding post (Fig. 1a).

ConneCtion

Fig. 1b: Single-wire connection.

One channel shown.

Fig. 1a: Single-wire connection.

One channel shown.

9

SINGLE WIRE CONNECTION

(MOTION 60XTi/50XTi/40i/35XTi/20i)

Please take note of the jumper clips installed under

the binding posts. These clips attach the high-fre-

quency and low-frequency sections of the crossover

together. Leaving these in place, connect the (+)

wire from your amplifier to either red (+) binding

post and the (–) wire from your amplifier to either

black (–) binding post (Fig. 1b).

WARNING! Only after jumper

clips are removed may you con-

nect individual runs of speaker

cable from your amplifiers to the high-frequency

and low-frequency signal input binding posts.

Damage will occur to your amplifiers if the

jumper clips are not removed.

JUMPER CLIPS

(MOTION 60XTi/50XTi/40i/35XTi/20i)

In some countries federal law prohibits

MartinLogan from supplying jumper clips. If none

are found installed under your speakers binding

posts, please refer to ‘Bi-Wire Connection’ for con-

nection instructions.

BI-WIRE CONNECTION

(MOTION 60XTi/50XTi/40i/35XTi/20i)

This connection method replaces the jumper clips

installed under the binding posts with individual runs

of speaker wire from your amplifier. This doubles

the signal carrying conductors from the amplifier to

the speaker, thus direct-coupling each portion of the

crossover to the amplifier.

To bi-wire you must first loosen the binding posts

and remove the jumper clips. Connect one set of

wires to the upper set of binding posts which con-

nect to the high-frequency drivers. Then connect a

second set of wires to the lower binding posts which

connect to the low-frequency drivers. Next, connect

both sets of wires to the appropriate terminals on

your amplifier. Please take care to connect both (+)

wires to the (+) amplifier terminals and both (–) wires

to the (–) amplifier terminals. This is known as a par-

allel connection (Fig. 2).

PASSIVE BI-AMPLIFICATION

(MOTION 60XTi/50XTi/40i/35XTi/20i)

For those that desire ultimate performance, these

speakers may be passively bi-amplified using the

existing internal passive crossover elements.

This method takes the bi-wiring concept one step

further. You will have a dedicated channel of

amplification directly connected to the high- and

low-frequency sections of the crossover. There are

two different methods for bi-amping with two stereo

amplifiers. The first and most common is referred

to as Horizontal Bi-amping. The second method is

referred to as Vertical Bi-amping. With either meth-

od you may use two stereo amplifiers or four mono

amplifiers, or two mono amplifiers and one stereo

amplifier. Get the idea? With either form of passive

bi-amplification, your preamplifier must have dual

outputs. If your preamplifier is not so equipped, you

must either purchase or construct a “Y” adapter.

Fig. 2: Bi-wire connection.

One channel shown.

10

Horizontal Passive Bi-Amplification

Horizontal bi-amping allows you to use two differ-

ent types, models or brands of amplifiers (i.e. tubes

on top, transistor on the bottom). However, we rec-

ommend that you use two identical amplifiers (i.e.

same brand and model). If you must use two differ-

ent amplifiers, it is essential that they have the same

gain or that one of the two have adjustable gain

so that you can match their gain characteristics. If

the amplifiers of choice do not have the same gain

characteristics, then a sonic imbalance will occur.

With horizontal bi-amping, one amplifier drives the

high-frequency section of the speaker while the sec-

ond amplifier drives the low-frequency section. To

horizontally bi-amp your speakers you must loosen

the binding posts and remove the jumper clips.

Connect the low-frequency amplifier to the lower

set of binding posts of both speakers. Connect the

high-frequency amplifier to the upper set of binding

posts. Next, connect the left and right preamplifier

outputs to the appropriate left and right inputs of

both amplifiers (Fig. 3).

Vertical Passive Bi-Amplification

The very nature of vertical bi-amping dictates that

both amplifiers be identical. With vertical bi-amp-

ing, each of the stereo amplifiers is dedicated to

one speaker. For instance, the left channel of each

amplifier drives the low-frequency section while the

right channel drives the high-frequency section. To

vertically bi-amp your speakers you must loosen the

binding posts and remove the jumper clips from

both speakers. Starting with one speaker, connect

the right channel to the lower binding posts and

the left channel to the upper binding posts. Repeat

the same procedure for the other speaker. Connect

the left preamplifier outputs to both inputs of the left

channel amplifier and the right preamplifier outputs

to both inputs of the right channel amplifier (Fig. 4).

ACTIVE BI-AMPLIFICATION

We do not recommend active bi-amplification. The

internal crossover can not be bypassed. This con-

nection method seriously degrades performance.

Fig. 3: Horizontal bi-amplification connection.

One channel shown.

Fig. 4: Vertical bi-amplification connection.

One channel shown.

11

WARNING! Installation other

than that described in the body of

this document requires specific

documentation from MartinLogan.

BREAK IN

Allow approximately 72 hours of break-in at 90

dB (moderate listening levels) before any critical

listening.

PLACEMENT

Although your speakers are designed to deliver a

superb sonic performance when placed close to a

wall, you may notice improved imaging and detail

if you are able to place the speakers (measured

from the tweeter and woofers) 2–3 feet from the

front wall and 2 or more feet from the side walls

(Fig. 5).

Assembly And PlACement

Fig. 5: Motion 60XTi/40i/35XTi/20i/15i

12

TOE-IN

To achieve superior stereo imaging we recom-

mend that you aim them towards the primary

listening position.

INSTALLING THE GRILL COVERS

To install this speaker’s magnetic grill covers simply

move them into place (Fig. 6).

SOLID FOOTING

(MOTION 60XTi/40i/20i)

With the use of the included outriggers and

spikes, your speakers will be firmly planted on the

floor, bass will tighten, and imaging will become

more coherent. To avoid floor damage, do not

implement the spikes until you are secure in the

positioning. The included spikes use a standard

1/4 - 20 thread.

Outrigger and Spike Installation (Fig. 7):

1) Carefully lay your speaker on its side.

2) Remove existing feet or spikes.

3) Motion 60XTi: Use the 4mm Allen tool and the

four bolts provided with the speaker to attach

the outriggers to the bottom of the speaker.

4) Thread new spikes into holes and screw them

in all of the way. If the speaker does not sit

level loosen one spike until level is achieved.

Fig. 6 Fig. 7

Motion

60XTi

Motion 40i/20i

13

5) Tighten the jam nut snugly by hand. Do not

over tighten the nut.

6) Right the speaker. Caution: Make sure your

hands and any cabling are clear of the spikes.

Do not slide speaker as spikes are sharp and

can damage your floor or carpet.

7) Adjust to level by rotating spikes. Tighten the

jam nut securely when satisfied that speaker

is level. Caution: “Walking” the speaker may

result in a broken spike.

INSTALLING ON A FLAT SURFACE

(MOTION 50XTi/35XTi/30i/15i)

If you have a surface that provides a wide, level,

and stable platform, the speaker can be placed

directly on top. When using the speaker in this

configuration, affix the pads to the bottom of the

speaker at the rear contact points (fig. 8). Note:

This speaker is not magnetically shielded and

therefore should not be placed directly beside or

atop a CRT television.

VERTICAL DISPERSION

(MOTION 50XTi/30i)

For optimal performance, the Folded Motion

tweeter should be aimed in the direction of your

ears when sitting in your primary listening position.

If your speaker is installed near or slightly below

ear height, orient the speaker so the flat side is on

bottom. When this speaker is installed on a low

surface, orient the speaker so the angled side is on

bottom (see figure 9).

Fig. 8 Fig. 9

14

How do I clean my speakers?

Use a dust free cloth (such as a micro fiber cloth)

or a soft brush to remove dust from your speakers.

Do not spray any kind of cleaning agent on or in

close proximity to the drivers.

Could you suggest a list of suitable elec-

tronics and cables ideal for MartinLogan

speakers?

We have no favorites and use electronics and

cables quite interchangeably. We would suggest

listening to a number of brands—and above all

else—trust your ears. Dealers are always the best

source for information when purchasing additional

audio equipment.

Is there likely to be any interaction

between my speakers and the televi-

sion in my A/V system?

Yes. These speakers are not shielded and should

be kept at least 2 feet away from a CRT television.

Will exposure to sunlight affect the life

or performance of my speakers?

We recommend against placing any loudspeaker

in direct sunlight. Ultraviolet (UV) rays from the sun

can cause deterioration of cabinet, speaker cones,

etc. Small exposures to UV will not cause a prob-

lem. Filtering of UV rays through glass will greatly

reduce the negative effects.

Should I use a 4, 6, or 8 Ohm rated

amplifier with my speakers?

All of our Motion series speakers are compatible

with 4, 6 or 8 Ohm output audio amplifiers and

receivers. Many of the most popular brands of AV

receivers and amplifiers with 4, 6 and 8 Ohm out-

put ratings have been thoroughly tested with all of

our Motion series products and we have found no

compatibility issues except under extreme listening

conditions. For the best performance and sonic

purity when using our Motion series products use

of an amplifier or AV receiver with either a 4 or 6

Ohm output is recommended!

Frequently Asked questions

No Output

• Check that all system components are turned

on and source material is playing.

• Check speaker wires and connections.

• Check all interconnecting cables.

• If you are unable to resolve your problem,

please contact your dealer or MartinLogan cus-

tomer service (see below).

troubleshooting

MartinLogan customer service is available

Monday–Friday between the hours of 8am–5pm

(central time) by calling (785) 749-0133 or by

emailing [email protected].

ContACting Customer serviCe

15

WARRANTY INFORMATION

Your speakers are provided with an automatic

Limited 90 Day Warranty coverage. You have

the option, at no additional charge, to receive a

Limited 5 Year Warranty coverage. To obtain the

Limited 5 Year Warranty coverage you need to

complete and return the Certificate of Registration

to MartinLogan within 30 days of purchase. For

your convenience MartinLogan also offers online

warranty registration at www.martinlogan.com.

MartinLogan may not honor warranty service

claims unless we have a completed Warranty

Registration card on file! If you did not receive a

Certificate of Registration with your new speakers

you cannot be assured of having received new

units. If this is the case, please contact your autho-

rized MartinLogan dealer.

SERIAL NUMBER

The serial number is located on back of the speak-

er, directly beneath the binding posts. The serial

number may also be found on the product carton.

SERVICE

Should you use your MartinLogan product in a

country other than the one in which it was originally

purchased, we ask that you note the following:

1 The appointed MartinLogan distributor for any

given country is responsible for warranty servicing

only on units distributed by or through it in that coun-

try in accordance with its applicable warranty.

2 Should a MartinLogan product require servicing

in a country other than the one in which it was

originally purchased, the end user may seek to

have repairs performed by the nearest MartinLogan

distributor, subject to that distributor’s local servic-

ing policies, but all cost of repairs (parts, labor,

transportation) must be borne by the owner of the

MartinLogan product.

3 If, after owning your speaker for six months, you

relocate to a country other than the one in which

you purchased your speaker, your warranty may be

transferable. Contact MartinLogan for details.

generAl inFormAtion

16

sPeCiFiCAtions*

Frequency Response .....................

Dispersion ............................

Sensitivity.............................

Impedance ............................

Crossover Frequency.....................

High Frequency Driver ...................

Mid Frequency Driver ....................

Low Frequency Drivers ...................

Cabinet ..............................

Components ...........................

Recommended Amp Power ................

Binding Post Inputs ......................

Weight...............................

Dimensions (HxWxD) ....................

Motion 60 XTi

35–25,000 Hz ± 3 dB

80° x 30°

94 dB @ 2.83 volts/ meter

4 Ohms. Compatible with 4, 6 or 8 Ohm rated

amplifiers.

400 & 2,200 Hz

1.25” x 2.4” (3.2cm x 6.1cm) Folded Motion

Transducer with 4.5” x 2.75” (11.4cm x 7cm)

diaphragm.

6.5” (16.5cm) aluminum cone with cast polymer

basket. Sealed chamber format. Rigid structured

dust cap to reduce cone break-up modes.

Two 8” (20.3cm) aluminum cone with cast alumi-

num basket. Non-resonant asymmetrical chamber

format. Rigid structured dust cap to reduce cone

break-up modes.

Ported

Custom air core coil and low DCR steel laminate

inductors. Polypropylene film capacitors in series

and low DF electrolytic capacitors in parallel.

Tweeter thermal/current protection.

20–400 watts

Custom 5-way bi-wire tool-less binding posts

66 lbs. (30 kg)

47.95” x 11.42” x 14.38”

(1217.93 x 290 x 320 mm)

*Specifications are subject to change without notice.

17

Motion 40i

40–25,000 Hz ± 3 dB

80° x 80°

92 dB @ 2.83 volts/ meter

4 Ohms. Compatible with 4, 6 or 8 Ohm rated

amplifiers.

500 & 2,600 Hz

1” x 1.4” (2.6cm x 3.6cm) Folded Motion

Transducer with 5.25” x 1.75” (13.3cm x 4.4cm)

diaphragm.

5.5” (14cm) aluminum cone with cast polymer basket.

Non-resonant asymmetrical chamber format. Rigid

structured dust cap to reduce cone break-up modes.

Two 6.5” (16.5cm) aluminum cone with cast poly-

mer basket. Non-resonant asymmetrical chamber

format. Rigid structured dust cap to reduce cone

break-up modes.

Ported

Custom air core coil and low DCR steel laminate

inductors. Polyester film capacitors in series and

low DF electrolytic capacitors in parallel. Tweeter

thermal/current protection.

20–300 watts

Custom 5-way bi-wire tool-less binding posts

45 lbs. (20.4 kg)

42.49” x 7.56” x 12.81”

(1079.12 x 192 x 325.25 mm)

Motion 20i

46–25,000 Hz ± 3 dB

80° x 80°

90 dB @ 2.83 volts/ meter

4 Ohms. Compatible with 4, 6 or 8 Ohm rated

amplifiers.

500 & 2,600 Hz

1” x 1.4” (2.6cm x 3.6cm) Folded Motion

Transducer with 5.25” x 1.75” (13.3cm x 4.4cm)

diaphragm.

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Two 5.5” (14cm) aluminum cone with cast poly-

mer basket. Non-resonant asymmetrical chamber

format. Rigid structured dust cap to reduce cone

break-up modes.

Ported

Custom air core coil and low DCR steel laminate

inductors. Polyester film capacitors in series and

low DF electrolytic capacitors in parallel. Tweeter

thermal/current protection.

20–200 watts

Custom 5-way bi-wire tool-less binding posts

33 lbs. (15 kg)

36.56” x 6.81” x 11.78”

(928.74 x 173 x 299.21 mm)

18

Frequency Response .....................

Dispersion ............................

Sensitivity.............................

Impedance ............................

Crossover Frequency.....................

High Frequency Driver ...................

Mid Frequency Driver ....................

Low Frequency Drivers ...................

Cabinet ..............................

Components ...........................

Recommended Amp Power ................

Binding Post Inputs ......................

Weight...............................

Dimensions (HxWxD) ....................

Motion 50 XTi

50–25,000 Hz ± 3 dB

80° x 30°

94 dB @ 2.83 volts/ meter

4 Ohms. Compatible with 4, 6 or 8 Ohm rated

amplifiers.

900 & 2,200 Hz

1.2” x 2.4” (3.2cm x 6.1cm) Folded Motion

Transducer with 4.5” x 2.75” (11.4cm x 7cm)

diaphragm.

N/A

Two 6.5” (16.5cm) aluminum cone with cast poly-

mer basket. Non-resonant asymmetrical chamber

format. Rigid structured dust cap to reduce cone

break-up modes.

Ported

Custom air core coil and low DCR steel laminate

inductors. Polypropylene film capacitors in series

and low DF electrolytic capacitors in parallel.

Tweeter thermal/current protection.

20–300 watts

Custom 5-way bi-wire tool-less binding posts

29 lbs. (13.2 kg)

7.56” x 22.83” x 12.52”

(192 x 580 x 318 mm)

19

Motion 30i

65–25,000 Hz ± 3 dB

80° x 80°

91 dB @ 2.83 volts/ meter

4 Ohms. Compatible with 4, 6 or 8 Ohm rated

amplifiers.

400 & 2,600 Hz

1” x 1.4” (2.6cm x 3.6cm) Folded Motion

Transducer with 5.25” x 1.75” (13.3cm x 4.4cm)

diaphragm.

N/A

Two 5.5” (14cm) aluminum cone with cast poly-

mer basket. Non-resonant asymmetrical chamber

format. Rigid structured dust cap to reduce cone

break-up modes.

Ported

Custom air core coil and low DCR steel laminate

inductors. Polyester film capacitors in series and

low DF electrolytic capacitors in parallel. Tweeter

thermal/current protection.

20–200 watts

Custom 5-way tool-less binding posts

18 lbs. (8.2 kg)

6.89” x 16.54” x 10.16”

(174.95 x 420 x 258 mm)

Motion 35 XTi

50–25,000 Hz ± 3 dB

80° x 30°

92 dB @ 2.83 volts/ meter

4 Ohms. Compatible with 4, 6 or 8 Ohm rated

amplifiers.

2,200 Hz

1.2” x 2.4” (3.2cm x 6.1cm) Folded Motion

Transducer with 4.5” x 2.75” (11.4cm x 7cm)

diaphragm.

N/A

6.5” (16.5cm) aluminum cone with cast polymer

basket. Non-resonant asymmetrical chamber

format. Rigid structured dust cap to reduce cone

break-up modes.

Ported

Custom air core coil and low DCR steel laminate

inductors. Polypropylene film capacitors in series

and low DF electrolytic capacitors in parallel.

Tweeter thermal/current protection.

20–250 watts

Custom 5-way bi-wire tool-less binding posts

17 lbs. (7.7 kg)

13.5” x 7.56” x 11.68”

(343 x 192 x 296.75 mm)

Frequency Response .....................

Dispersion ............................

Sensitivity.............................

Impedance ............................

Crossover Frequency.....................

High Frequency Driver ...................

Mid Frequency Driver ....................

Low Frequency Drivers ...................

Cabinet ..............................

Components ...........................

Recommended Amp Power ................

Binding Post Inputs ......................

Weight...............................

Dimensions (HxWxD) ....................

Motion 15

60–25,000 Hz ± 3 dB

80° x 80°

92 dB @ 2.83 volts/ meter

5 Ohms. Compatible with 4, 6, or 8 Ohm rated

amplifiers.

2,700 Hz

1” x 1.4” (2.6cm x 3.6cm) Folded Motion

Transducer with 5.25” x 1.75” (13.3cm x 4.4cm)

diaphragm.

N/A

5.25” (13.3cm) aluminum cone with cast basket.

Non-resonant asymmetrical chamber format.

Rigid structured dust cap to reduce cone break-up

modes.

Ported

Custom air core coil and low DCR steel laminate

inductors. Polypropylene film capacitors in series

and low DF electrolytic capacitors in parallel.

Overall system thermal/current protection.

20–200 watts

Custom 5-way binding posts

12 lbs. (5.4 kg)

11.42” x 6.81” x 9.38”

(290 x 173 x 238.25 mm)

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MartinLogan MO20IGB Manuel utilisateur

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