Definitive Technology Mythos ST-L User manual

Owner's Manual

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1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance
with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers,
stoves, or other apparatus (including amplifiers) that produce heat.
9. Do not defeat the safety purpose of the polarized or grounding plug.
A polarized plug has two blades with one wider than the other. A grounding
plug has two blades and a third grounding prong. The wide blade or the third
prong is provided for your safety. If the provided plug does not fit into your outlet, consult
an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at the plugs,
convenience receptacles, and at the point where they exit from the apparatus.
11. Only use attachments/accessories specified by the manufacturer.
12. Use only with the cart, stand, tripod, bracket, or table specified
by the manufacturer, or sold with the apparatus. When a cart or rack
is used, use caution when moving the cart/apparatus combination
to avoid injury from tip-over.
13. Unplug the apparatus during lightning storms or when unused
for long periods of time.
14. Refer all servicing to qualified personnel. Servicing is required when the
apparatus has been damaged in any way, such as when power supply cord
or plug is damaged, liquid has been spilled or objects have fallen into the
apparatus, or apparatus has been exposed to rain or moisture, does not
CAUTION
ATTENTION: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR
RISK OF ELECTRIC SHOCK
DO NOT OPEN
operate normally, or has been dropped.
15. WARNING: To reduce the risk of fire or electric shock, do not expose
this apparatus to rain or moisture. The apparatus shall not be exposed
to dripping or splashing and objects filled with liquids, such as vases,
shall not be placed on apparatus.
16. WARNING: The mains plug/appliance coupler is used as disconnect device;
the disconnect device shall remain readily operable.
17. Protective grounding terminal. The apparatus should be connected to a
mains socket outlet with a protective grounding connection.
18. Correct Disposal of this product. This marking indicates that this
product should not be disposed with other household wastes
throughout the EU. To prevent possible harm to the environment or
human health from uncontrolled waste disposal, recycle it responsibly
to promote the sustainable reuse of material resources. To return your
used device, please use the return and collection systems or contact retailer
where the product was purchased; they can take this product for environmental
safe recycling.
19. No naked flame sources, such as lighted candles, should be placed
on the apparatus.
20.
This lightning flash with arrowhead symbol within an equilateral triangle
is intended to alert the user to the presence of non-insulated “dangerous
ohemZ`^pbmabgma^ikh]n\ml^g\ehlnk^maZmfZr[^h_ln__b\b^gmfZ`gb-
tude to constitute a risk of electric shock.
Warning: To reduce the risk of electric shock, do not remove cover (or back) as
IMPORTANT SAFETY INSTRUCTIONS

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EN
there are no user-serviceable parts inside. Refer servicing to
qualified personnel.
The exclamation point within an equilateral triangle is intended to
alert the user to the presence of important operating and maintenance
instructions in the literature accompanying the appliance.
21. The battery (battery or batteries or battery pack) shall not be exposed
to excessive heat such as sunshine, fire or the like.

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TABLE OF CONTENTS
Performance Benchmarks of the Mythos ST-L........................................................................................................................................2
Unpacking and Inspecting Your Mythos ST-L ........................................................................................................................................3
What’s In Your Mythos ST-L Carton.....................................................................................................................................................3
Locating your Mythos ST-L Super Towers .............................................................................................................................................4
Aiming the loudspeakers into your listening area .................................................................................................................................4
5.1 Home Theater Conguration .......................................................................................................................................................5
Room Acoustics ...............................................................................................................................................................................5
Adjustable Gliders ...........................................................................................................................................................................6
Carpet Spikes .................................................................................................................................................................................6
Connections....................................................................................................................................................................................7-11
Subwoofer Tuning............................................................................................................................................................................11
Subwoofer Adjustment .....................................................................................................................................................................12
Remote control ................................................................................................................................................................................13
Fine Tuning .....................................................................................................................................................................................14
LED Indicators .................................................................................................................................................................................15
Troubleshooting...............................................................................................................................................................................17
Service...........................................................................................................................................................................................18
Technical Assistance.........................................................................................................................................................................18
Warranty........................................................................................................................................................................................19
Specications..................................................................................................................................................................................20-21

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PERFORMANCE BENCHMARKS
OF THE MYTHOS ST-L
Mythos ST-L represents a major redesign of this consummate
Denitive Technology oor standing loudspeaker. Like the original
Mythos ST, Mythos ST-L features a built-in powered subwoofer
in an elegant extruded aluminum enclosure. But the ST-L is more
than a renement of the previous model. It is, in fact, a meticulous
rethinking of the original high performance super tower. Drivers,
tweeter, amplier and user interface, all have been signicantly
developed to offer serious audio listeners elegant appearance,
greater convenience and exhilarating performance.
tImproved mid- and high-frequency detail
tOverall higher output
tLower harmonic and intermodulation distortion
tFlatter frequency response on- and off-axis
tMore extended, lower-distortion bass response
tGreater soundstage width and depth
tEasier foot/spike height adjustment
tMore convenient bass-level adjustment
tImproved appearance

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UNPACKING AND INSPECTING YOUR MYTHOS ST-L
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 Denitive 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. Please record the serial
numbers found on the back of your Mythos ST-Ls in an appropriate place and
register them online at: www.denitivetech.com/registration/
WHAT’S IN YOUR MYTHOS ST-L CARTON
Inside each Mythos ST-L loudspeaker carton you should nd:
1. One Mythos ST-L Super Tower with attached AC power cord
2. Literature Packet (Letter and Owner’s Manual)
3. Accessory Box (Remote Control, batteries,
(4) Carpet spikes)
AAA AAA
LEFT BASS
RIGHT BASS
LOW LEVEL
-+
-+
-+
STEREO BASS
ON OFF
MUTE
POWERON OFF
LR

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LOCATING YOUR MYTHOS ST-L SUPER TOWERS
The following guidelines are for a 2-Channel setup, a classic conguration that optimizes the Mythos ST-L’s performance for the most
critical listener. Please remember that no two rooms and listening set-ups are the same, so don’t be afraid to experiment with your speakers.
Whatever sounds best to you is what matters.
AIMING THE LOUDSPEAKERS INTO YOUR
LISTENING AREA
To enjoy the most realistic stereo image and lifelike sound, place the speakers
so that an equilateral triangle is created between the speakers and your
favorite listening position
If your room arrangement forces you to place the speakers farther apart than
the distance from which you are listening, angle the speakers toward the
middle. Angling the speakers in (pointed directly at the listener) will result in a
somewhat brighter, clearer sound. This angling creates a sharper focus and a
more solid central image; generally, we recommend that you take some time to
experiment with speaker positioning and toe-in angle to nd the best balance
between image width and focus. Do your positioning experiments before
installing the spike feet.
LEFT SPEAKER TV & CENTER SPEAKER RIGHT SPEAKER
1'-2'FT
2-CHANNEL SETUP

5.1 HOME THEATER CONFIGURATION
Four Mythos ST-L Super Towers will make an astounding 5.1 home theater.
When used as left and right surrounds, do not locate the speakers forward of
your listening position. If you use the towers as left and right rear surrounds,
position them wide apart if possible. (For instance, if there is a couch in the
center of the rear wall, position the speakers wider apart than the couch). If a
full Mythos ST-L Home Theater loudspeaker setup isn’t in the budget right now,
Denitive Technology also offers a complete line of center channel and surround
loudspeakers, any of which will blend with your Mythos ST-L front stage. We
specically recommend the Mythos Ten for the best-match center channel speaker.
Note: Each loudspeakers Identity Switch should be set to “Left” or “Right” depending
on which side of the room the speaker is located.
ROOM ACOUSTICS
Ideally, the speakers should be placed at one to two feet from room boundaries,
such as large pieces of furniture, walls and especially corners. Placing a speaker
closer to room boundaries increases bass, but may result in a “boomy” or
bass-heavy sound and degradation of stereo imaging. Try varying the speakers’
distance from the rear walls, side walls, and corners until the best balance
between low frequency extension and clarity is achieved. If you cannot get the
speakers at least one foot from the room boundary, treat the adjacent room
boundaries with absorbing or diffusing material to improve performance.
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LEFT SPEAKER TV & CENTER SPEAKER RIGHT SPEAKER
LEFT REAR
SURROUND RIGHT REAR
SURROUND
20º20º
5.1 HOME THEATER SETUP

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ADJUSTABLE GLIDERS
Mythos ST-L feet can be leveled and stabilized using either the rubber-tipped
glides, which are already installed on the knurled thumb screws or with oor
spikes, which are included in the accessory box.
The knurled knobs that protrude above the base are threaded, so you can
level your speakers while they stand upright. Simply grip the knurled knob
and turn clockwise to raise height at that corner or counter-clockwise to
lower height. A spirit level will help you achieve perfect verticality.
CARPET SPIKES
Use the optional carpet spikes to provide much greater stability and
performance when placing your loudspeakers on carpeting.
Note: take care when using the spikes, as they may cause damage to wooden
or other oors, which are susceptible to being scratched. Denitive Technology is
specically not responsible for damage that may result from the use of spikes.
RAISE THE HEIGHT
CARPET SPIKES
KNURLED
KNOB
RUBBER-TIPPED
GLIDES
LOWER THE HEIGHT

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CONNECTIONS
HIGH LEVEL CONNECTIONS
THE 5-WAY BINDING POST
Mythos ST-L Super Towers have gold-plated 5-way binding posts, which are
the audiophile standard. They give you tremendous hookup exibility when
it comes to the type of connector you want to use, including spade and pin
connectors, single and dual banana plugs and, of course, bare wire. The
following directions are for bare wire:
BARE WIRE HOOKUP
Follow the hookup directions included with your receiver. Strip 1/2 inch
(12.7mm) of insulation from each of the two conductors of the wire to
expose the bare metal and twist each of the individual conductors into
single un-frayed strands. Note that one of the terminals on the rear of each
speaker is red (+) and the other is black (–). 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 wire
has some indicator (such as color-coding, ribbing or writing) on one of the
two conductors to help you maintain consistency.
To connect wire to the binding post, unscrew the binding 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. Tighten the nut back down on the binding post until it rmly
meets the wire. Do not over tighten.
LOOSEN HEX NUT. INSERT SPEAKER WIRE
THROUGH HOLE.
TIGHTEN HEX NUT. DO NOT INSERT INSULATED
SECTION OF SPEAKER WIRE.
1 2
3 4

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BI-WIRING
Bi-wiring in effect provides the midrange drivers and tweeter with separate
signal paths, improving their damping factor and reproducing recorded mate-
rial with greater clarity, depth and detail. Each Mythos ST-L Super Tower has
a set of Bi-wire (high level) 5-way binding posts, and an LFE input. Simply
run separate speaker wires to the low and high frequency drivers from a
single amplier.
Note: You must remove the jumper strips that connect the terminals before you
bi-wire your loudspeakers.
Connect one set of speaker wires to the upper terminals (tweeter) on
each speaker and one set of wires to the lower terminals (midrange/
subwoofer). Connect the other ends of both wire sets to the corresponding
amplier outputs.
Important Note: Both speakers must be connected in the same way (in correct
polarity) to their own channel of the amplier. If you experience a great lack of
bass, it’s likely that one speaker is out of polarity with the other.
AMPLIFIER
LEFT CHANNEL RIGHT CHANNEL
BI-WIRING

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BI-AMPING
Bi-amping improves the way your sound system handles
those more demanding moments when listening to music
or watching cinema. When a piece of music is at its
most demanding, bi-amping can help each section of
your speaker by giving each driver and tweeter their
own source of power, creating a sense that the sound
being reproduced is more effortless, less constrained.
CAUTION: You must remove the jumper strips that con-
nect the terminals before you bi-amp your loudspeakers;
you will damage your loudspeakers if you don’t.
After removing the jumpers, connect the speaker wires
from the high frequency amplier outputs to the upper
set (tweeter) of terminal posts on each speaker. Follow
the same procedure for connecting the low/mid
frequency amplier outputs (midrange/subwoofer)
to the lower set of terminals. Maintain correct wiring
polarity (+ to +, – to –) in all connections.
HIGH FREQ. AMPLIFIER
LEFT CHANNEL RIGHT CHANNEL
MID/LOW FREQ. AMPLIFIER
LEFT CHANNEL RIGHT CHANNEL
REMOVE
REMOVE
BI-AMPING

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WIRE RECOMMENDATIONS
The Mythos ST-L is an ultra-performance loudspeaker and should be used with high
quality audiophile-grade speaker wire. Consult your retailer for specic brand and
model recommendations. Use at least 14 gauge stranded cable.
LOW LEVEL CONNECTIONS
USING THE LFE INPUT ON YOUR MYTHOS ST-Ls
In most multi-channel systems the best hookup method is simply to connect speaker
wires to the high level inputs. Set “Speaker Set Up” or “Bass Management” of the multi-
channel receiver/processor to Front L&R = LARGE and Subwoofer = NO. With this
method you will get every iota of performance that your system can deliver.
You also have the option to use the low level LFE input in addition to the speaker wires.
This method gives you more control of the LFE channel level relative to the L&R channel's
bass. Use a “Y” connector (available from your dealer) out of the LFE output on your
receiver or processor to feed two line level cables, connecting one to the LFE input on
your left Mythos ST-L and the other to the LFE input on your right speaker. Set “Speaker
Set Up” or “Bass Management” of the multi-channel receiver/processor to Front L&R =
LARGE and Subwoofer = YES.
LOW LEVEL

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USING MULTI-CHANNEL, SACD OR DVD-AUDIO WITH YOUR ST-Ls
Because of the nature of their bass management systems, a multi-channel Home Theater System, SACD player or DVD-Audio player
(or any other format that requires using 6- channel or more interconnects) requires the use of an LFE connection between your
receiver or processor and your Mythos ST-L Loudspeakers. This will simply give you more control over your bass. If you are using
one of these players, or have a multi-channel home theater system, use the connection method outlined in the “Using the LFE Input”
section and set your speakers to “Large.”
POWERING UP THE ACTIVE SUBWOOFER
Your Mythos ST-L Super Towers contain a built-in, active powered subwoofer section. This means each Mythos ST-L must be plugged
into an electrical socket of the appropriate voltage using the plug on the end of the electrical cord, which is attached to the speaker
through the hole at the bottom of the base. The Mythos ST-L has a special circuit that automatically turns the powered subwoofer
section on when a signal is fed to the loudspeaker and does not require an on-off switch. Please note that it is normal for you to
hear a small pop from the speaker when the amp powers up.
SUBWOOFER TUNING
Tuning ST-L built-in subs is accomplished in two steps: a coarse setting, which involves the controls on the back of each tower, and
a ne tuning adjustment, which is accomplished from your listening position using the Bass Remote Control. Begin by following the
“Coarse Sub Adjustment” steps.
SETTING LEFT AND RIGHT CHANNEL CONFIGURATION (IDENTITY SWITCH)
The Identity Switch tells which loudspeaker to respond to which commands from the remote control. Each Mythos ST-L Super Tower
can be congured as either a left or right channel loudspeaker. This is done by setting the L/R identity switch, which is on the back
of each loudspeaker, to correspond to the loudspeaker’s left or right orientation.

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SUBWOOFER ADJUSTMENT
1. Select “Left” on the slide switch on the input panel of the Left unit (as you face the
speaker) and “Right” on the right speaker.
2. Set the “Subwoofer Gain” on each speaker’s input plate to 0dB (the correct setting for
most systems and rooms).
3. Set the balance control on your receiver or preamp to full left channel (or disconnect the
right channel speaker if you don’t have a balance control).
4. On the remote, press the Low Level Off button to make sure that function is disengaged.
5. Now play a mono music recording that has a good balance of bass and midrange. Set
the Left Bass level control until you hear a good balance of bass to midrange.
As you change bass level, the white LEDs on the front of the speaker will indicate the varia-
tion + or – from 0dB in 1dB increments (see explanation of LEDs on page 15).
If you have to turn the bass level nearly all the way up to +7dB to get the bass level you
want, go back to the subwoofer gain button (Sub Gain) on the input panel and switch to the
+10 dB position.
If you have to turn the bass level all the way down to get the bass level you want, go back
to the subwoofer gain switch on the input panel and switch to the –10 dB position. Repeat
the process for the other channel (the other tower).
SUB LEVEL
SUB GAIN

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REMOTE CONTROL
Note: For your convenience, the IR receiver is located on each loudspeaker just below the D’Appolito Array (Midrange/
Tweeter/Midrange complement) near the top of the tower. This location lets you aim your remote at a normal listening height
from any where in the room.
The Mythos ST-Ls remote makes it easy to set just the right amount of bass output to compensate for program material,
listening level differences and room acoustics. The remote is the best tool for perfectly adjusting the built-in subwoofers
to achieve seamless blending with the mid-range drivers.
1. Power ON/Off: Press these buttons to turn the subwoofer on or off.
2. Mute L/R: Mutes either the left or right subwoofer. Hitting the speaker’s Mute button again,
or the corresponding Bass Level toggle, will take the loudspeaker out of mute.
3. Left Bass and Right Bass +/–: Increases/decreases the left and right loudspeaker’s subwoofer levels respectively.
Note: the volume range goes from –7 to 0 to +7 and is indicated by the LEDs at the base of the loudspeaker, beneath
the Denitive Technology logo.
4. Low Level On/Off: Engaging Night Mode compresses the dynamic range so that the peak bass volume level is
reduced—ideal for leaving family members, or neighbors, undisturbed late at night.
5. Stereo Bass Control: This increases or decreases both loudspeakers’ subwoofer levels simultaneously.
Note: If the line of sight from your listening position to the IR receiver on the loudspeaker is obstructed, the remote will
not work. Connect an IR remote repeater (optional, available from most audio/video specialty dealers) to the IR remote
jack on the back of the loudspeaker. Labeled "IR IN."
LEFT BASS
RIGHT BASS
LOW LEVEL
-+
-+
-+
STEREO BASS
ON OFF
MUTE
POWERON OFF
LR

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FINE TUNING
ADVANTAGES OF TUNING FROM THE LISTENING POSITION
Subwoofer levels can be set for each channel independently to compensate for room acoustics or placement anomalies. For example, if one
speaker is placed closer to a wall or corner than the other, it will probably have greater bass output due to boundary reinforcement. Realizing
consistent bass output between two speakers in a stereo pair makes an enormous difference in timbre and imaging accuracy.
FINE ADJUSTMENT
Now switch back to a stereo recording and use the Stereo Bass control to make your nal adjustment (you will probably want to turn the bass
level down a bit). As you make settings adjustments, the white LEDs on the front of the towers light up to indicate the setting value and then
turn off a few seconds later.
1. Sit in your favorite listening position with remote in hand.
2. Play a piece of music you are very familiar with that has good deep bass content.
3. Using the Stereo Bass control on the remote, adjust the volume up or down to taste.
The bass should have impact without sounding too “heavy.”

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LED INDICATORS
There is a single Power LED on the back panel of
each loudspeaker. There are 15 LEDs on the front
panel below the Denitive Technology logo that
light to indicate any change you make in volume
levels or power status.
Remote Control LED Indicates
Power On LED on rear panel shines red.
White LED’s turn on sequentially from the middle
to the outside then show the base trim value and
end at blue LED center.
Power Off All LEDs on front of tower shine, then turn off
sequentially.
Volume Levels
(Stereo Bass, Left & Right Bass)
On front of tower: Indicated by +/-7 white LEDs
to the left and right of the blue center LED.
Low Level Mode On: Center Blue LED turns to red and dims
Off: Center red LED turns blue and trim value
shown on white LEDs. Hold and then fade to dim
Blue LED
Mute On: Center blue LED turns red and then fades in
and out until mute condition is terminated
Off: Center red LED turns blue, trim value is
shown on white LED’s, hold and then fade to dim
blue LED
Rear Panel Controls LED Indicates
Sub Level +/- Indicated by +/–7 white LEDs on front panel.
Subwoofer Gain –10, 0, +10 indicated by 3 blue LEDs
Amplier Power On/Off Indicated by red LED
VOLUME LEVELS UPVOLUME LEVELS DOWN

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USING THE MYTHOS ST-L LOW-LEVEL CONTROL
Your Mythos ST-Ls have a low level control on the remote control, which initiates dynamic range compression of the subwoofers to bring
down their overall levels. This feature is especially invaluable for late-night movie viewing when others in the home are trying to sleep.
ADDING AN EXTERNAL SUBWOOFER TO YOUR MYTHOS ST-L
Although the built-in subwoofers in your Mythos ST-Ls deliver superb low frequency response and are all that are required for amazing
performance, some listeners go for the ultimate performance and add an additional powered subwoofer to their system. If you choose to do
so, we strongly suggest using the SuperCube8000 (www.denitivetech.com/SuperCube8000) in order to achieve the highest level of sound
quality possible. This should be driven with an additional RCA low-level cable connected to the LFE output of your receiver or processor. Your
receiver or decoder’s bass management system should still be set to “Large” left and right main speakers and “Yes” subwoofer.
SPEAKER BREAK-IN PERIOD
Your Mythos ST-L Super Towers should sound good right out of the box; in fact, there is no specic speaker break-in period. The best
recommendation we can make is to play your speakers. We have found that after around 40-60 hours (or more) of normal playing, the
suspensions work in, and this results in fuller bass, a more open “blossoming” midrange and smoother high frequency reproduction.

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TROUBLESHOOTING
IMPORTANT NOTE REGARDING DISTORTION
If you hear distortion when the speakers are being driven at high volume levels, it’s because you’re driving (turning up) the amplier too loud
and not from driving the speakers with more power than they can handle. Remember, most ampliers produce their full-rated power well
before the volume control is turned all the way up! If your speakers distort when you play them loud, turn down the amplier.
IMPORTANT NOTE ON INTERNAL OVERLOAD PROTECTION
The subwoofers feature an internal overload protection circuit, which will turn the subwoofers off or down if overdriven or overheated;
after a few minutes, they will resume normal operation.
If you experience any difculties with your Mythos ST-Ls, try the suggestions described below. If you are still having problems, please consult
your Denitive Technology Authorized Dealer for assistance.
1. Make sure all your system interconnects and power cords are solidly in place.
2. Should you experience any level of hum or noise, try plugging the power cords into the same power outlet as your amplier.
3. The system has sophisticated internal protection circuitry. If for some reason the protection circuitry is tripped, please turn down your
system’s volume and wait ve minutes before trying the system again. If the amplier should overheat, the system will turn off until the
amplier cools down and resets.
4. Check to be sure that your power cord has not been damaged.
5. Check that no foreign objects or liquid have entered the cabinet.
6. If you cannot get the subwoofer driver to turn on, or if no sound comes out and you are sure the system is set up properly,
please bring the loudspeaker to your Denitive Technology Authorized Dealer for assistance, but please call rst.