Millennia TD-1 User manual

Twin Direct
1
TD-1
Twin Direct
Recording Channel
Instruction Manual
Rev A3, 6/03 (2500)
© 2003, Millennia Media, Inc.
All rights reserved. Litho in U.S.A.

TD-1
2
ONE YEAR WARRANTY
MillenniaMediawillrepairthisproduct,freeofcharge,intheUSA,inthe
eventofdefectofmaterialsorworkmanshipforone(1)yearfollowing
dateofpurchase. This warranty is extended only to the originalpur-
chaser. This limited warranty covers failures due only to defects in
materialsand workmanship that occurduring normal, intended useand
doesnotcover damage which occurs in shipment or failures whichare
caused by products not supplied by Millennia. This limited warranty
doesnot cover failures whicharise from accident, misuse,abuse,
neglect, mishandling, misapplication, faulty installation, improper adjust-
ment,alterationormodificationofproduct,incompatibilities,line-power
surges,actsof God, or service performed by anyone other thanMillen-
niaorits authorized agent. Vacuum tube failures are not coveredunder
warranty.
LIMITS AND EXCLUSIONS
There are no express warranties except as listed above. Millennia shall
notbeliable for special, subsequent, incidental, consequential, or
punitivedamages, including, but notlimited to: damage torecordings,
broadcasts, microphones, mixing consoles, or any associated equip-
ment, downtime costs, loss of goodwill, or claims of any party dealing
with purchaser for such damages resulting from the use of this product.
Allwarranties,expressandimplied,includingthewarrantiesof merchant-
ability and fitness for a particular purpose are limited to the applicable
warrantyperiodsetforthabove.
Somestatesdonot allow the exclusion or limitation of incidental or
consequential damages, or length of time an implied warranty remains in
effect.Assuch, the above exclusions may not apply. This warrantygives
you specific legal rights and you may also have other rights which can
vary from state to state.
REAMP® isa registered U.S. trademark. REAMP technologyis used
underlicense -- U.S.Patno. 6,005,950.

Twin Direct
3
TABLE OF CONTENTS
GOVERNMENTAL NOTICES 4
INSPECTION 7
SAFETY PRECAUTIONS 9
DESIGN CRITERIA 11
QUICK START 12
FRONT PANEL FUNCTIONS
Input Section 13
Equalizer Section 17
Routing Section 19
REAR PANEL FUNCTIONS 20
SIGNAL FLOW DIAGRAM 26
GROUND LIFTING & ISOLATION 28
JUMPER MAPS 29
ASSEMBLY INSTRUCTIONS (Rack Mount, etc..) 31
PERFORMANCE GRAPHS 33
SPECIFICATIONS 36
CONTACT INFORMATION Back Cover
http://www.mil-media.com

TD-1
4
FCC NOTICE
INFORMATION FOR THE USER
This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential instal-
lation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interfer-
ence will not occur in a particular installation. If this equipment
does cause harmful interference to radio or television recep-
tion, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by
one or more of the following measures:
1) Reorient or relocate the receiving antenna
2) Increase the separation between the equipment and re-
ceiver
3) Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
4) Consult the dealer of an experienced radio/TV technician
for help.
The user may find the following publication prepared by the
Federal Communications Commission helpful:
“How to Identify and Resolve Radio-TV Interference Prob-
lems” (Stock Number 004-000-00345-4)
Available exclusively from the Superintendent of Documents,
Government Printing Office, Washington, DC 20402 (telephone
202-512-1800)
FCC WARNING
Changes or modifications not expressly approved by the party
responsible for compliance to Part 15 of the FCC Rules could
void the user’s authority to operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation
is subject to the following two conditions: (1) This device may

Twin Direct
5
not cause harmful interference, and (2) This device must
accept any interference received, including interference that
may cause undesired operation. This Product Certified to
meet the Standards in the categories: Audio/Video and Musi-
cal Instrument Apparatus for Household, Commercial, and
Similar General Use EMI: FCC Part 15 Class B; ICAN ICES-003
Class B; EN55022 Class B
CE NOTICE
INFORMATION FOR THE USER
This equipment has been tested and found to comply with the
limits for a Class B or Class 2 digital device, pursuant to EN
55022 Rules. These limits are designed to provide reason-
able protection against harmful interference when the equip-
ment is operated in a commercial environment. This equip-
ment generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the instruc-
tion manual, may cause harmful interference to radio commu-
nications. Operation of this equipment in a residential area is
likely to cause harmful interference in which case the user will
be required to correct the interference at his own expense.
The user may find the following publication prepared by the
Federal Communications Commission helpful:
“How to Identify and Resolve Radio-TV Interference Prob-
lems” (Stock Number 004-000-00345-4)
Available exclusively from the Superintendent of Documents,
Government Printing Office, Washington, DC 20402 (telephone
202-512-1800
WARNING
Changes or modifications not expressly approved by the party
responsible for compliance to EN 55022 Rules could void the
user’s authority to operate the equipment.

TD-1
6
ICAN Class B Digital Equipment
This Class B apparatus meets all requirements of the Cana-
dian Interference-Causing Equipment Regulations.
Cet appareil numérique de la classe B respecte toutes les
exigences due Reglement sur le materiel brouilleur du
Canada
BZT Declaration (German)
Bescheinigung de Millennia Media, Inc. hiermit wird bescheinigt,
dass die Direct Box TD-1 “TWIN DIRECT” in Übereinstimmung
mit den Bestimmungen der VFG 523/1969, DIN 57871 / VDE 0871
/ 09.84, und DIN 75875 Part 1 A2 / 10.90 (Amtsblattvertugung)
funk-entstört ist.
Der Deutshchen Bundespost wurde das Inverkehrbringen dieses
Gerats angezeight und die Berechtigung zur Überprüfung der
Serie auf Einhaltung der Bestimmungen eingeräumt.
Einhaltung mit betreffenden Bestimmungen kommt darauf an,
dass geschirmte Ausführungen gebraucht werden. Für die
Beschaffung richtiger Ausführungen ist der Betreiber
Verantwortluich.
Dieses Gerät wurde sowohl einzelnals auch in einer Anlage, die
einen normalen Anwendungsfall nachbildet, auf die Einhaltung
der Funkentstörbestimmungen gerprüft. Es ist jedoch möglich,
dass die Funkentstörbestimmungenunter Ungunstigen
Umständen bei anderen Gerätekombinationen nicht Eingehalten
werden. Der Betreiber ist für die Einhaltung der
funkeutstörungsbestimmungen seiner gesamten Anlage
verantwortlich, in der dieses Gerät betrieben wird.
Millennia Media, Inc.

Twin Direct
7
INSPECTION
Congratulations on your purchase of the Millennia TD-1TWINDIRECT
recordingchannel.TD-1istheculmination of meticulous listening tests
on innumerable circuit, topology, and packaging designs over decades
ofaudio product development experience. Your TD-1is a finely tuned
instrument intended for critical professional applications — with the
added benefits of selectable vacuum tube DI amplifier, all discrete FET
solid state DI amplifier, variable input impedances, Speaker Soak(tm),
and REAMP®, we feel it offers the world’s best soundingand most
sonicallyversatileDI + recording path. With the emergence of 24+bit
digital audio, recording engineers are faced with a new requirement for
undistorted dynamic range. Twin Direct meets this challenge exception-
ally well.
NOTE: Any changes or modifications not expressly approved by
MILLENNIAMEDIA, INC. (Millennia) couldvoid your authority tooperate
thisequipmentunder the EC, ICAN, or FCC rules.
1. Copyright: You acknowledge that no title to the intellectual property in
the TD-1 is transferred to you.
2.Inspection: Inspect packing box(es),TD-1, and cable(s) fordamage,
unusualmarks, or shortages. It is yourresponsibility to report damage,
shortage,or mis-shipments in atimelymanner. Millenniaand/or its
dealers will not be responsible for claims arising from damage in
shipping, nor will claims for shortage or mis-shipments be honored, more
than 10 days after ship date.
3.Read this manual carefully and completelybefore attempting to use
theTD-1. Improper operation could resultin damage to product. Itis the
user’sresponsibilitytounderstandthesafeuseandoperationofthis
device.
4.Theshippingboxofthe TD-1 system will include (1) Owner’s Manual,
(2) TD-1, (3) a UL approved power cord, (4) Owner’s Registration Card,
(5) Four rubber feet with mounting hardware, and (6) Steel carrying
handle with mounting hardware. Fill out the Owner’s Registration Card
andreturntoMillenniaat your earliest ability.
Thematerial contained in thismanualconsistsof information thatis
propertyofMillenniaandisintended solely for use by the purchasers of
theequipmentdescribedinthismanual. Without express written permis-

TD-1
8
sion,Millenniaprohibits the duplication of any portion of this manualor
theusethereoffor any purpose other than the operation and/or mainte-
nance of the equipment described in this manual. This manual may not
beduplicated in wholeorin part withoutthewrittenconsent ofMillennia.
TD-1, TWIN DIRECT, Speaker Soak,and Twin Topology are trade-
marksofMillenniaMedia,Inc. Allother trademarks are property of their
respective holders. TD-1 serial number is located on the rear left side of
each unit. We suggest that you record the serial number in the space
provided below. Refer to it whenever you call an authorized Millennia
repair facility or the manufacturer. Make sure that you return your com-
pletedwarrantycardimmediately.
Featuresandspecificationssubjectto change without notice.
©2003- Millennia Media,Inc.,All rightsreserved
Serial No.
______________________________________________________________
Purchase Date
___________________________________________________________
Where Purchased
_________________________________________________________

Twin Direct
9
SAFETY PRECAUTIONS
For your safety and the safety of others, be sure to read and understand
allsafety and operational instructions before attemptingto use the TD-1.
WARNING: The TD-1 internal circuitry carries lethal voltages.
Carefullyobserveallwarnings,precautions,and instructions on the TD-1
andasdescribedintheinstructions supplied with the unit.
1. WATER, MOISTURE, AND SPILLAGE
Do not attempt to use the TD-1 in, near, or around water or in unusually
moist environments, such as near a sink or swimming pool. Prevent liq-
uids or any other materials or objects from spilling or falling into the TD-1
unit.
2. HEAT AND VENTILATION
Besuretoallowadequateventilation to TD-1 and avoid using or installing
unitinclose proximity to heat sources, such as heaters, stoves,radiators,
poweramplifiers,spotlights, or other heat-producing appliances or equip-
ment.
3. POWER SOURCES AND POWER CORD PROTECTION
The TD-1 Power Supply should be connected to a power source only of
thetypedescribedintheoperating instructions or as marked on the Power
Supply. Route the power cord so that it is not likely to be walked on or
pinched by having objects placed on it. Pay particular attention to plugs,
receptacles,andthe point where the AC power cord exits theTD-1.
4. GROUNDING
Foryoursafety, it is extremelyimportantthatthegrounding pin of the 3-wire
power cable (included with unit) be inserted into a grounding type 3-pin
poweroutlet. If you are unable to insert the pluginto an existing outlet, con-
tact an electrician to install a properly grounded 3-pin power outlet, prefer-
ablythatwith OFI / CFI protection, ifavailable.
5. DAMAGE REQUIRING SERVICE
Thisunitshouldberepairedorservicedbyqualifiedpersonnelwhenever:
· The AC power cord has been damaged, or
· Objects have fallen or liquid has spilled into any TD-1 unit, or
·The unitdoesnotfunction properlyorexhibitsa markedchangeinperfor-
mance, or
· The unit has been abused, dropped, or damaged, or

TD-1
10
·The unit has beenexposed to rain ormoisture
6. SERVICING
Lethal voltages are found inside the TD-1 chassis. Theusershould
notattemptto repair or service this unit.Allservicingand/orrepairsshould
bereferredtoMillennia.
If, after reading all instructions, precautions, and warnings, you have re-
mainingquestions,please contact Millennia directly before attempting to
useyourTD-1.Retainthisowner’smanualasarecordofyourpurchaseto
aidpositive identificationintheevent ofloss.
Beforeconnectingpower to the TD-1, assure that the rear panelvoltage
selectionfuse block switch is set correctly. IntheUSA or Japan, TD-1 is
shipped with the voltage selection block set to 100-120 VAC. If you
change the voltage selection block to 200-240 VAC usage, be sure to
changebothfusesto the correct types. See “Rear Panel” instructions for
properfuserequirements.
The TD-1 enclosure measures approximately 8.5" wide x 3.5" high x
13.5"deep and is designed formounting (in pairs) into astandard 2U,
19"equipment rack. If the TD-1 is mounted in aroad case or other rack
whichis prone to strong vibrationor shock, it is highlyrecommended that
the rear of the TD-1 be supported or otherwise reinforced to withstand
suchconditions.TD-1containshighvoltage vacuum tube and discrete
transistors, many running in Class-A bias. As such, the TD-1TWIN
DIRECT runs quite warm and should be mounted for proper ventilation
with at least one rack screw space open above and below the unit.
TD-1 is designed on a common ground topology. For high quality
operation, and for your own safety and the safety of others,donotdefeat
the power cord earth grounding pin. If required, earth ground can be lifted
safely via built-in switching, described later.
TD-1 FRONT-END PROTECTION: Millennia Music & Media
Systems enjoys a reputation for what many top engineers and producers
call the world’s most musically accurate and dynamically uniform
microphone preamplifier — the HV-3: an option on the TD-1. But this
thoroughbreddesignis not achieved without certain operating criteria.
Back-to-back Zener diodes protect the super-matched discrete bipolar
inputtransistorsagainst high transient energy spikes common when
insertingandextracting XLR connectors. To maintain top performance
andprotecttheTD-1’ssensitiveHV-3 front-end, it is advised that you do