Definitive Technology Mythos Gem Manuel utilisateur

Please Inspect For Shipping Damage

Each loudspeaker leaves our plant in perfect condition. Any visible or concealed

damage most likely occurred in handling after it left our plant and should be

reported at once to your Deﬁnitive dealer or the shipping company which deliv-

ered your loudspeaker.

Congratulations

Congratulations on your purchase of the Deﬁnitive

Technology Mythos Gem Satellite/Surround Speaker System.

This revolutionary loudspeaker utilizes state-of-the-art

components (homopolymer-coned bass-midrange drivers,

moving coil ferroﬂuid-cooled pure aluminum dome high

frequency radiators, uniphase crossover networks, etc.),

housed in a beautiful non-resonant polished aluminum

aircraft-grade cabinet in order to achieve the most lifelike

sound possible in your listening room for many years to come.

Your Mythos Gem is a unique speaker which may be used

as a high-performance rear or side surround matched with any

of our Mythos or any of our other ﬁne speakers. In addition,

it is a superb front left and right satellite speaker which may

be combined with any of our subwoofers. Four Mythos Gem

speakers combined with a Mythos Seven center channel

and a Deﬁnitive subwoofer make a fantastic, complete,

high-performance home theater 5.1 speaker system.

Mythos Gem™

Satellite/Surround Speaker System

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It is critical for proper performance that both speakers (left and right) be connect-

ed in proper phase. Note that one terminal on each speaker (the +) is colored red and

the other (the -) is colored black. Please make certain that you connect the red (+)

terminal on each speaker to the red (+) terminal of its channel on your ampliﬁer or

receiver, and the black (-) terminal to the black (-) terminal. It is essential that both

speakers be connected in the same way to the ampliﬁer (in phase). If you experience

a great lack of bass, it is likely that one speaker is out of phase with the other.

Usually if distortion is heard when the speakers are being driven at

loud levels, it is caused by driving (turning up) the ampliﬁer too loud and

not driving the speakers with more power than they can handle. Remember,

most ampliﬁers put out their full rated power well before the volume control

is turned all the way up! (Often, turning the dial half way up is actually full

power.) If your speakers distort when you play them loud, turn down the

ampliﬁer or get a bigger one.

The Mythos Gem is a tremendously versatile speaker which makes a perfect left

and right channel front satellite speaker (when used with a Deﬁnitive subwoofer)

as well as a superb rear or side surround speaker. We will describe the various

aspects of its use for both of these applications starting with the simplest instructions

ﬁrst: for its use as a rear or side surround.

The Mythos Gem is designed to be extremely ﬂexible in terms of their place-

ment when used as surround speakers. They may be used on the side walls, rear

walls or in the rear corners of the listening room. When placed along the side walls

the speakers should normally be located adjacent to or behind the listening position.

The speakers may also be placed near the rear corners of the room or located on the

rear wall. If you have your couch or listening position near or against the rear wall,

we suggest rear wall placement of the Mythos Gem with them positioned on either

side of the couch and in from the side wall. High placement is preferred; however,

midwall or ﬂoor placement is certainly acceptable. Normally speakers would be

hung on the wall with the input connection plate up against the wall, however, the

Mythos Gem may also be placed on shelves or stands. Of course, experimentation is

encouraged to get the best performance in your particular room. As a starting point,

we suggest mounting the speakers on the side walls behind the listening position

about 3-6 feet off the ﬂoor and halfway between the listening position and the rear

wall.

When using Mythos gem in Dolby EX and other 6.1 and 7.1 systems (which they

are perfect for), one pair will normally be located on the side walls as described

When a pair of Mythos Gems is used in conjunction with a Deﬁnitive sub, they

may be connected either directly to the left and right channel of your ampliﬁer or

receiver, or to the left and right speaker level outputs on a Deﬁnitive sub (when the

Deﬁnitive sub is connected via the high-level speaker wire inputs to the left and

right channel speaker outputs on your receiver). Connecting the Mythos Gems to a

Deﬁnitive Sub (which includes a built-in high-pass crossover for the Mythos Gems)

will result in greater dynamic range (the system can be played louder without over-

driving the satellites) and is recommended for most installations, especially when

the system is being used for home theater. Because this is the most common set-up,

the following instructions relate to wiring the Mythos Gems to a Deﬁnitive sub.

Wiring 2 Mythos Gems and 1 Deﬁnitive Sub for Stereo (2-Channel) Use

1) First, wire the red (+) terminal of the left channel speaker wire output of your

receiver or ampliﬁer to the red (+) terminal of the left channel speaker wire (high

level) input of your Deﬁnitive Sub.

2) Next, wire the black (-) terminal of the left channel speaker wire output of your

receiver or ampliﬁer to the black (-) terminal of the left channel speaker wire (high

level) input of the Deﬁnitive sub.

3) Repeat Steps 1 and 2 for the right channel.

4) Wire the red (+) terminal of the left Mythos Gem to the left channel red (+)

speaker wire (high level) on the back of the Deﬁnitive sub.

5) Wire the black (-) terminal of the left Mythos Gem to the left channel black (-)

speaker wire (high level) on the back of the Deﬁnitive sub.

6) Repeat steps 4 & 5 for the right Mythos Gem.

7) Set the low frequency ﬁlter control on the back of the Deﬁnitive sub to approximately

2 o’clock. Please note that the exact frequency will depend on many factors including

speciﬁc positions of the speakers in the room, so you might experiment with a slightly

higher or lower setting to achieve ideal blending between the sub and the satellites for

your particular set-up. Listen to a wide variety of music to determine the correct setting

for this in your system.

8) Set the subwoofer level control so that it sounds properly balanced with the satellites.

Please note that the exact level depends on many factors including your room size, posi-

tion of the speakers, etc. as well as your personal listening taste, so you might experi-

ment with the subwoofer level while listening to a wide variety of music until you

achieve the ideal setting for your system.

9) If your receiver allows you to choose whether or not the main speakers are to receive

a full-range signal, choose full range (or “Large Left and Right Main Speakers”). 3

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above and an additional 1 or 2 speakers will be located on the rear wall as described

above. IMPORTANT, PLEASE READ: When the Mythos Gem is used as a rear

or side surround speaker, the bass management of your receiver or decoder for those

channels should be set to “Small.”

There are many different variations of the basic Dolby ProLogic and Dolby

Digital AC-3 formats and features, as well as a multiplicity of ways in which the

speakers can be hooked up to these systems. We will discuss the simplest and most

effective hookups and adjustments. If you have a particular question regarding your

set-up, please call us.

For Dolby ProLogic Systems

Follow Steps 1-9 provided earlier. The subwoofer will receive its low frequency

signal through the full-range speaker level outputs. If, however, your system has a

separate subwoofer RCA low level output which has a remote control level adjust-

ment, you might also want to hook this up using an RCA-to-RCA low level cable

to the LFE/subwoofer-in low level input (the lower RCA input) on a Deﬁnitive sub.

Then use your remote control sub level adjustment to ﬁne-tune the low frequency

level for different types of program material. You might ﬁnd you want a higher level

for some music or for movies.

For Dolby Digital AC-3 5.1 Systems

Please note that Dolby Digital decoders have bass management systems (systems

which direct the bass to the various channels) which vary from unit to unit. It is

absolutely critical that the bass management system be properly set in order to

achieve proper performance.

The simplest way to hook up and use your system with Dolby Digital decoders is

to hook up the left and right front Mythos Gems and Deﬁnitive sub as described in

Steps 1 through 9 earlier. Wire your center channel to the center channel out on your

receiver (or center channel ampliﬁer) and your left and right rear surround speakers

to the rear channel outputs on your receiver or rear channel ampliﬁer (taking care that

all speakers are in phase, i.e. red (+) to red (+) and black (-) to black (-). Set the bass

management system of your receiver or decoder for “Large” left and right main speak-

ers, “Small” center, “Small” rear surround speakers and “No” subwoofer. All the

bass information including the .1 channel LFE signal will be directed to the main left

and right channels and into the subwoofer giving you all the beneﬁts of Dolby Digital

AC-3 5.1.

Optional Hook-Up

An option on this hook-up (if your decoder will allow you to select “Large” left and

right main speakers and “Yes” subwoofer), in addition to the hook-up as described

above, is to use an RCA- to-RCA low level cable to connect the LFE/sub-out on your

receiver to the low-level LFE/sub-in (the lower RCA input) on a Deﬁnitive sub. Tell

your bass management system that you have “Large” left and right main speakers,

“Yes” subwoofer and “Small” center and “Small” surrounds. You will then be able to

raise the LFE .1 channel level being fed to the subwoofer by either using the LFE/sub

remote level adjustment on your decoder (if it has one) or the LFE .1 channel level con-

trol on your Dolby Digital channel balancing procedure. This set-up has the advantage

of allowing you to set the low frequency level on the Deﬁnitive sub for smooth

balance with music while also allowing you to “juice up the bass” for movies with

the controls on your decoder. It should also sound somewhat better.

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Since Dolby Digital is capable of delivering a full-range bass signal to the rear

channels, some more elaborate systems will include an additional Deﬁnitive sub for

the rear channels. In this case, simply wire the Mythos Gems to the Deﬁnitive sub

as described in 1 thru 8 earlier, except wire to the rear surround outputs. Set the

bass management system for “Large Rear Speakers.”

Your Mythos Gems should sound good right out of the box; however, an

extended break-in period of 20-40 hours or more of playing is required to reach

full performance capability. Break-in allows the suspensions to work in and

results in fuller bass, a more open “blossoming” midrange and smoother high

frequency reproduction.

-I

Variation on the Optional Hook-up

One variation on the optional hook-up is to hook up and adjust the system as

described under “Optional Hook-Up” except select “Small Left and Right Main

Speakers” and a “Subwoofer” on the bass management system (along with “Small

Center” and “Small Rear Surrounds”). The advantage of this over the Optional Hook-

Up will be somewhat greater dynamic range (i.e., you can play the system louder).

However, depending on the speciﬁc characteristics of the crossovers designed into your

bass management system, the transition and blending between the satellites and sub-

woofer may not be quite as smooth and continuous as the Optional Hook-Up, or with

the basic hook-up detailed above in Steps 1-9. However, if you wish to play the system

louder, you can experiment with this variation. In addition, this variation is also one

which can be used if your decoder bass management system does not allow a

“Large Left and Right Main Speakers” and “Subwoofer” setting.

We encourage you to experiment with the various settings on your subwoofer,

settings on your decoder, and hook-up options as described until you ﬁnd the best

combination for you.

It is important that some simple set-up recommendations be followed in order to

assure optimum performance in your room. Please remember that although these

recommendations are usually valid, all rooms and listening set-ups are somewhat

unique, so do not be afraid to experiment with the speakers. Remember, whatever

sounds best to you is correct.

The Mythos Gem Loudspeakers may be placed on a stand or shelf or be mounted

on the wall. Placement close to the wall will increase the bass output while

placement further from the rear wall will decrease the bass output.

When used as fronts, the speakers should usually be placed 6 to 8 feet apart

and kept away from the side walls and corners. A good rule of thumb is to place

the speakers separated by one half the length of the wall they are positioned along,

and each speaker one quarter the length of the wall behind them away from the

side wall.

Your Mythos Gem comes with an optional wall-bracket designed to securely

mount your speaker ﬂush to your wall. The bracket can ONLY be used with a

vertical installation. For safety, it is extremely important that this bracket be installed

with molly-bolts or similarly effective fasteners appropriate for the construction of

your wall. Be sure to use all four of the mounting holes when fastening the bracket

to the wall. Never use unanchored or improperly anchored screws in your wall.

Professional installation is strongly recommended. Your dealer can either arrange

this for you, or refer you to a qualiﬁed installer.

To determine the bracket’s position on the wall, use the mounting template which

comes with your speakers. If you are mounting your Mythos Gem close to anything

above it, please allow an extra 1 1/4 inches above the top of the speaker for the

speaker to slide onto its bracket.

If your speaker wires are to be hidden inside the wall, be sure to conform to your

local building codes. When installed on the bracket, the center of the Mythos Gem

speaker terminals will be as indicated on the template.

To install the Mythos Gem on its bracket, securely fasten the mounting screw

supplied into the threaded hole on the rear of the speaker, screwing it in as far as it

will go. The speaker will then hang in the “keyhole” on the bracket. After placing the

screw in this opening, pressing down ﬁrmly on the top of the speaker will seat

the speaker properly and avoid any rattles during use.

In addition, the Mythos Gem has a threaded insert on the back which may be

used with a wall-mount pivoting bracket such as the Deﬁnitive ProMount 80.

-M

It is our pleasure to offer assistance if you have any questions regarding your

Mythos Gems or their set-up. Please contact your nearest Deﬁnitive Technology

dealer or contact us directly at 410-363-7148.

Service and warranty work on your Deﬁnitive loudspeakers will normally be per-

formed by your local Deﬁnitive Technology dealer. If, however, you wish to return

the speaker to us, please contact us ﬁrst, describing the problem and requesting

authorization as well as the locations of the nearest factory service center. Please

note that the address given in this booklet is the address of our ofﬁces

only. Under no circumstances should loudspeakers be shipped to our

ofﬁces or returned without contacting us ﬁrst and obtaining return

authorization.

Deﬁnitive Technology Ofﬁces

11433 Cronridge Drive, Suite K

Owings Mills, Maryland 21117

phone: 410-363-7148

VERY IMPORTANT: SETTING CHANNEL BALANCE AND BASS MANAGEMENT SYSTEMS

Dolby Digital and Dolby ProLogic systems and decoders have a critical channel balancing

procedure for the left and right front speakers, center channel, rears and subwoofer (if it

is hooked up through the LFE or Sub Out low-level connection) which must be followed if

the system is to perform properly. We have spoken with many system users with problems

relating to the overall sound of their system which could be clearly traced back to improper

system balance.

Also note that Dolby Digital decoders have bass management systems (systems which

direct the bass to the various channels) which vary from unit to unit. This bass management

system must also be properly adjusted. If your Mythos Gem loudspeakers are hooked up

with speaker level wires coming directly from your ampliﬁer and you are using a separate

subwoofer which is connected to your receiver only with a LFE low-level connection, your

receiver’s or decoder’s bass management system should be set for “Small” left and right

main speakers, “Small” center, “Small” surrounds, and “Yes” subwoofer. If your Mythos

Gem loudspeakers are hooked up with speaker level wires coming directly from your sub-

woofer (as described in the hook-up directions) and your subwoofer is connected to your

receiver or ampliﬁer with speaker level wire, then your receiver’s or decoder’s bass man-

agement system should be set for “Large” left and right main speakers, “Small” center,

“Small” surrounds, and “No” subwoofer if your subwoofer is just hooked up to your ampli-

ﬁer with speaker level wires, or “Yes” if your subwoofer is hooked up to your ampliﬁer with

both speaker wires and a LFE low-level connection (as described in the hook-up directions).

If you are using the Mythos Gem speakers as rear or side surround speakers, set the rear or

side surround bass management to “Small”. Also, do not be afraid to experiment.

Remember, whatever sounds best to you is correct.

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Dimensions: 10.25"H x 4.25"D x 4.13"W

Frequency Response: 60Hz – 30kHz

Efﬁciency: 89 dB

Nominal Impedance: Compatible with 8 ohm outputs

Driver Complement: Two 3.5" long-throw upper bass/midrange drivers with

butyl rubber surrounds, one ferroﬂuid-dampened pure

aluminum dome tweeter

Enclosure: Polished extruded aircraft-grade aluminum

Rec. Assoc. Ampliﬁcation: 10 – 200 watts per channel

This product complies with the essential requirements of

EMC directives 89/336/EEC and 73/23/EEC (inclusive of

93/68/EEC) and carries the CE mark accordingly.

CZAT 012809

Deﬁnitive Technology warrants to the original retail purchaser only that this Deﬁnitive Technology

Loudspeaker Product (the “Product”) will be free from defects in materials and workmanship for a period of

ﬁve (5) years covering the drivers and cabinets, and three (3) years for the electronic components from the

date of the original purchase from a Deﬁnitive Technology Authorized Dealer. However, this warranty will

automatically terminate prior to the expiration of ﬁve (5) years for the drivers and cabinets and three (3) years

for the electronic components if the original retail purchaser sells or otherwise transfers the Product to any

other party. The original retail purchaser shall hereinafter be referred to as “you.” Defective Products must be

shipped, together with proof of date of purchase, prepaid insured to the Authorized Dealer from whom you

purchased the Product, or to the nearest factory service center. Product(s) must be shipped in the original ship-

ping container or its equivalent; in any case the risk of loss or damage in transit is to be borne by you. If, upon

examination at the Factory or a Deﬁnitive Technology Authorized Dealer, it is determined that the unit was

defective in materials or workmanship at any time during this Warranty period, Deﬁnitive Technology or the

Deﬁnitive Technology Authorized Dealer will, at its option, repair or replace this Product at no additional

charge, except as set forth below. All replaced parts and Product(s) become the property of Deﬁnitive

Technology. Product(s) replaced or repaired under this Warranty will be returned to you, within a reasonable

time, freight collect.

This Warranty does not include service or parts to repair damage caused by accident, misuse, abuse,

negligence, inadequate packing or shipping procedures, commercial use, voltage in excess of the rated maxi-

mum of the unit, cosmetic appearance of cabinetry not directly attributable to defects in materials or work-

manship, or service, or repair or modiﬁcation of the Product which has not been authorized by Deﬁnitive

Technology. Deﬁnitive Technology makes no Warranty with respect to its Products purchased from dealers

or outlets other than Deﬁnitive Technology Authorized Dealers. This Warranty is in lieu of all other

expressed Warranties. If this Product is defective in material or workmanship as warranted above, your sole

remedy shall be repair or replacement as provided above. In no event will Deﬁnitive Technology be liable to

you for any incidental or consequential damages arising out of the use or inability to use the Product, even if

Deﬁnitive Technology or a Deﬁnitive Technology Authorized Dealer has been advised of the possibility of

such damages, or for any claim by any other party. Some states do not allow the exclusion or limitation of

consequential damages, so the above limitation may not apply to you.

All implied warranties on the Product are limited to the duration of this expressed Warranty. Some states

do not allow limitation on how long an implied Warranty lasts, so the above limitations may not apply to you.

This Warranty gives you speciﬁc legal rights, and you also may have other rights which vary from state to

state.

Limited Warranty:

5-Years for Drivers and Cabinets,

3-Years for Electronic Components

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