Definitive Technology DI 8R Speaker System User Manual

Definitive Technology
Mythos Nine Loudspeakers
Thank You
Thank you for choosing the Definitive Technology Mythos Nine Loudspeaker
System. Our engineers have spent many years in developing this product. In order
to ensure that you experience the finest performance possible, we encourage you
to take a moment to fully read this owner’s manual and familiarize yourself with
the proper installation and set-up procedures for your Mythos Nine speakers.
Unpacking Your Mythos Nine Speakers
Mythos Nine
Frequency Response:
Nominal Impedance:
Driver Complement:
28" long x 5.4" wide x 4.13" deep (711mm l x 137mm w x 105mm d)
(speaker only, not including bracket)
13 lbs. (6 kG)
90 dB
38 Hz – 30 kHz
8 ohms
Two each 41⁄2" (11.4cm) BDSS High output drivers pressure coupled to
two 41⁄2" x 8" (11.4cm x 20.3cm) Low Bass Radiators, One 1" (25mm)
ferro-magnetic fluid damped Pure Aluminum dome tweeter.
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 delivery company that delivered your
loudspeaker. Please unpack your system carefully. Save all cartons and packing
materials in case you move or need to ship your system. Record the serial number
found on the back of the Mythos Nine in the appropriate place on the product
registration card, answer all questions and send it in.
Various parts and accessories that you will need to use your Mythos Nine are in the
carton but are easy to overlook. Open both ends of the shipping carton. Carefully
examine the contents of the shipping carton and packing material to find the plastic
bags with accessories.
Specifications subject to change without notice.
Definitive Technology
Positioning the Mythos Nine
The Mythos Nine may be used vertically as a L&R main or surround
speaker or oriented horizontally and used as a center channel loudspeaker.
The Mythos Nine may be placed directly
on top of TVs that have at least 5-inches
(13 cm) of flat surface on top. Do not
place the speaker on top of any surface
that is not large or stable enough to
securely support the speaker. If the
speaker seems at all unstable or “tipsy”
place the speaker somewhere else. The
warranty does not cover damage caused
by falls due to improper positioning of
the speaker. If the speaker is above seated
listener height, extend the leveling foot
to point the speaker downward
(See Using the Leveling Foot on page 3).
When used as a center speaker the
Mythos Nine may be mounted on the
wall above or below the video screen.
It may be placed on a table or shelf
in front of the TV.
3”(75 mm)
If placed on a shelf under a TV, adjust the
leveling feet (screwed all the way in) to
aim the speaker up towards the listeners.
When used as L&R main or surround
speaker the Nine must be wallmounted flanking the screen as
illustrated. Allow at least 3 inches
(75 mm) between the edge of the
video screen and the nearest edge of
the speaker. If you need a speaker
that can be shelf-mounted, please
contact your Definitive Technology
retailer. Definitive offers other
models of Mythos Series speakers
that have shelf-mount stands.
Even if you intend to place the Mythos Nine on a TV or shelf, you must attach the wall-mount bracket to the speaker. See Using the Leveling Foot on page 3.
Wall Mounting the Mythos Nine
We recommend that wall mounting of speakers be performed
by professional installers or by those appropriately skilled in the
use of power tools and the knowledge of building codes and
structural issues.
We recommend that you determine a suitable location for
your speaker installation, and that you complete all wiring
(especially “hidden” in-wall wiring) before mounting
brackets to your walls.
Mythos Brackets are not suitable for ceiling mounting.
2. Make sure the location you have selected for wall-mounting
does not conceal behind-wall electrical wiring or plumbing.
3. The supplied cardboard mounting template is double-sided; one
side is for horizontal orientation and the other is for vertical
mounting. Be sure to face the correct side toward you. Hold the
cardboard template (included) in the intended location. Make
sure the speaker clears the ceiling, adjacent walls, corners, beams,
lighting fixtures and door/window frames. Leave at least
11⁄2" (38 mm) above or to the side of the speaker location to
allow the speaker to slide onto the bracket.
4. Make sure the center of the template is
centered with the TV screen’s center points.
The Mythos Nine loudspeaker comes with a wall mounting bracket and
template that makes secure mounting a breeze. Follow these directions
for installing the wall mounting bracket.
1. Two 1⁄4"–20 screws have been factory installed on the back of
the speaker. Gently hand-turn the screws to make sure they are
in as far as they can go. Do not force them beyond the “stop”
point. The screws cannot screw all the way into the speaker and
should protrude as shown in the illustration.
5. When mounting the speaker horizontally
use a bubble level to make sure the template
is level. When mounting the speaker
vertically, use a plumb line to find perfect
vertical. If the TV is off-level or off plumb,
the speaker will look better if it is off-level
or plumb in exactly the same way as the TV.
6. Use push pins to secure the template to the wall.
7. Mark the location of pilot holes noted on the Mounting Template
with a pencil; remove the template.
8. Pre-drill the pilot-hole locations for mounting screws (not
included). Use screws rated to hold securely in the wall material
(we recommend #10 screws).
9. It is best if at least one screw hits a wall stud. If there is no stud
behind the pilot hole location, install wall anchors (not included)
to secure the bracket screws. Follow the wall anchor manufacturer’s
directions. Each wall anchor should be rated to hold at least onehalf of the product net weight [see specifications on front cover].
Using the Leveling Foot
If you are going to use the Mythos Nine in horizontal mode on a shelf
or table, first attach the wall bracket to the speaker as described above.
Attach the one “L” bracket to the wall bracket using one M4 x 10mm
screw provided. Thread the foot screw into “L” bracket and adjust to
required height.
Attaching the Logo Badge
10. For masonry walls, use a masonry drill bit to pre-drill holes, and
use masonry anchors and screws (not included).
11. Pull the speaker wires through the hole in the bracket.
12. Screw the bracket to the wall.
13. The bracket has two sets of keyhole slots, one set for vertical and
the other set for horizontal orientation. When the wall mounting
bracket is securely screwed to the wall, line up the speaker’s
protruding Mounting Screws with the appropriate keyhole slots on
the wall mounting bracket. Let the speaker slide straight down
(in horizontal alignment) or push the speaker sideways (vertical
alignment), allowing the screw heads to slip behind the smaller
end of the keyhole slots. Gently push the edge of the speaker
opposite the screw heads toward the wall until the speaker snaps
onto the lower lip of the bracket.
Mythos Nine can be mounted either vertically as main or surround
speakers, or horizontally for use as a center channel speaker. The logo
badge is not pre-attached to the grille and is packaged in a plastic bag
along with the other accessories, and should be affixed in the correct
place on the grille once you have determined the speaker’s alignment.
For horizontal (center channel) use, align the badge with the location
on the long side of the grille (see illustration); for vertical use, align the
badge with the location on the short side of the grille. To affix the logo
badge, hold the grille in your hands as shown in the illustration. Using
your thumbs, carefully press the badge posts through the cloth and into
the two badge slot holes. The logo badge should snap into place. Do not
press the badge too hard or you may crack the grille.
Vertical orientation
badge slot
Horizontal orientation
(center channel) badge slot
Connecting the Mythos Nine
To connect the speaker to your receiver or amplifier, strip 1⁄2 inch
(15 mm) of insulation from each conductor of the speaker wire to
expose the bare metal and twist each of the individual conductors into
single un-frayed strands.
Mounting the Mythos Nine to an articulating
TV bracket
If you have a Plasma or LCD TV that is attached to the wall via a
swing-out articulating bracket such as those offered by Chief, Sanus
and OmniMount, the Mythos Nine speaker may be attached
to the bracket without using the supplied wall-mount plate. Simply
use 1⁄4"–20 screws to attach the speakers directly to the TV bracket.
Consult the TV bracket manufacturer’s user manual for more
specific speaker mounting instructions.
Note that one of the terminals is marked with red band (+) and the other
is marked with black band (-). Make certain that you connect the wire
from the red (+) terminal of your amplifier or receiver to the red (+)
terminal on your speaker and the wire from the black (-) terminal of your
amplifier or receiver to the black (-) terminal on your speaker. Most
speaker wire has some indicator (such as color-coding, ribbing or writing)
on one of the two conductors to help you maintain consistency. It is
essential to connect both speakers to the amplifier in the same way (in
phase). If you experience a lack of bass or poor surround effect, it is likely
that one or more of the channels is connected in incorrect polarity and
needs to be rewired, paying closer attention to connect positive to
positive; negative to negative on all channels.
To connect wire to the binding post [see figure above], unscrew the
knurled nut and insert the bare wire into the hole near the base of the
binding post. Do not insert the insulated part of the wire into the hole as
this will not give you a good connection. Twist the hex nut back down
the binding post until it firmly meets the wire. Do not over-tighten.
Connect a single RCA cable from the “SUB OUT” of your receiver to the
LFE input of the subwoofer (not included). This connecting method
bypasses the subwoofer’s internal “crossover” or low pass filter and relies
on the crossover filter built into your receiver.
Receiver/Speaker Set-up
Access Your Receiver’s “Speaker Set-up” or “Speaker
Configuration” Menu
1. In the Speaker Set-up/Configure function of your receiver, set all
channels that are connected to Mythos Nines to “Small.”
2. Select “Yes” when asked if you are using a subwoofer.
3. Set the subwoofer crossover frequency on the receiver to 100 Hz.
Service and warranty work on your Definitive loudspeakers will
normally be performed 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 location 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.
For more information on Definitive Technology Loudspeakers and accessories,
visit, or email
Definitive Technology, Owings Mills, Maryland, USA. 800-228-7148
Definitive Technology Offices
11433 Cronridge Drive, Owings Mills, Maryland 21117
Phone: (800) 228-7148 (US & Canada),
01 (410) 363-7148 (all other countries)
Technical Assistance
It is our pleasure to offer assistance if you have any questions
regarding your Mythos Nine or its set-up. Please contact your nearest
Definitive Technology dealer or call us directly at (800) 228-7148
(US & Canada), 01 (410) 363-7148 (all other countries) or e-mail
Limited Warranty:
5-Years for Drivers and Cabinets,
3-Years for Electronic Components
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 shipping 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 maximum of the unit, cosmetic
appearance of cabinetry not directly attributable to defects in materials or workmanship, 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.
This product complies with the essential requirements
of the EMC directive 89/336/EEC.