Millennia TD-1 User Manual

Twin Direct

1

Recording Channel

Rev A3, 6/03 (2500)
© 2003, Millennia Media, Inc.

All rights reserved. Litho in U.S.A.

TD-1

Twin Direct

Instruction Manual

TD-1

2

ONE YEAR WARRANTY

Millennia Media will repair this product, free of charge, in the USA, in the
event of defect of materials or workmanship for one (1) year following
date of purchase. This warranty is extended only to the original pur­chaser. This limited warranty covers failures due only to defects in
materials and workmanship that occur during normal, intended use and
does not cover damage which occurs in shipment or failures which are
caused by products not supplied by Millennia. This limited warranty
does not cover failures which arise from accident, misuse, abuse,
neglect, mishandling, misapplication, faulty installation, improper adjust­ment, alteration or modification of product, incompatibilities, line-power
surges, acts of God, or service performed by anyone other than Millen­nia or its authorized agent. Vacuum tube failures are not covered under
warranty.

LIMITS AND EXCLUSIONS

There are no express warranties except as listed above. Millennia shall
not be liable for special, subsequent, incidental, consequential, or
punitive damages, including, but not limited to: damage to recordings,
broadcasts, microphones, mixing consoles, or any associated equip­ment, downtime costs, loss of goodwill, or claims of any party dealing
with purchaser for such damages resulting from the use of this product.
All warranties, express and implied, including the warranties of merchant­ability and fitness for a particular purpose are limited to the applicable
warranty period set forth above.

Some states do not allow the exclusion or limitation of incidental or
consequential damages, or length of time an implied warranty remains in
effect. As such, the above exclusions may not apply. This warranty gives
you specific legal rights and you may also have other rights which can
vary from state to state.

REAMP® is a registered U.S. trademark. REAMP technology is used

under license -- U.S. Pat no. 6,005,950.

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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

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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 instal­lation. 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 interfer­ence will not occur in a particular installation. If this equipment
does cause harmful interference to radio or television recep­tion, 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 re­ceiver

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 Prob­lems” (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

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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 Musi­cal 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 reason­able protection against harmful interference when the equip­ment is operated in a commercial environment. This equip­ment generates, uses, and can radiate radio frequency energy
and, if not installed and used in accordance with the instruc­tion manual, may cause harmful interference to radio commu­nications. 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 Prob­lems” (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.

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ICAN Class B Digital Equipment

This Class B apparatus meets all requirements of the Cana­dian 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

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INSPECTION

Congratulations on your purchase of the Millennia TD-1 TWIN DIRECT
recording channel. TD-1 is the culmination of meticulous listening tests
on innumerable circuit, topology, and packaging designs over decades
of audio product development experience. Your TD-1 is 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
and REAMP®, we feel it offers the world’s best sounding and most
sonically versatile DI + 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 exception­ally well.

NOTE: Any changes or modifications not expressly approved by
MILLENNIA MEDIA, INC. (Millennia) could void your authority to operate
this equipment under 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) for damage,
unusual marks, or shortages. It is your responsibility to report damage,
shortage, or mis-shipments in a timely manner. Millennia and/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.

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,

3. Read this manual carefully and completely before attempting to use
the TD-1. Improper operation could result in damage to product. It is the
user’s responsibility to understand the safe use and operation of this
device.

4. The shipping box of the 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
and return to Millennia at your earliest ability.

The material contained in this manual consists of information that is
property of Millennia and is intended solely for use by the purchasers of
the equipment described in this manual. Without express written permis-

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sion, Millennia prohibits the duplication of any portion of this manual or
the use thereof for any purpose other than the operation and/or mainte­nance of the equipment described in this manual. This manual may not
be duplicated in whole or in part without the written consent of Millennia.

TD-1, TWIN DIRECT, Speaker Soak, and Twin Topology are trade­marks of Millennia Media, Inc. All other 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 com­pleted warranty card immediately.

Features and specifications subject to change without notice.
© 2003- Millennia Media, Inc., All rights reserved

Serial No.
______________________________________________________________

Purchase Date
___________________________________________________________

Where Purchased
_________________________________________________________

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SAFETY PRECAUTIONS

For your safety and the safety of others, be sure to read and understand
all safety and operational instructions before attempting to use the TD-1.

WARNING: The TD-1 internal circuitry carries lethal voltages.

Carefully observe all warnings, precautions, and instructions on the TD-1
and as described in the instructions 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 liq­uids or any other materials or objects from spilling or falling into the TD-1
unit.

2. HEAT AND VENTILATION

Be sure to allow adequate ventilation to TD-1 and avoid using or installing
unit in close proximity to heat sources, such as heaters, stoves, radiators,
power amplifiers, spotlights, or other heat-producing appliances or equip­ment.

3. POWER SOURCES AND POWER CORD PROTECTION

The TD-1 Power Supply should be connected to a power source only of
the type described in the operating 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, and the point where the AC power cord exits the TD-1.

4. GROUNDING

For your safety, it is extremely important that the grounding pin of the 3-wire
power cable (included with unit) be inserted into a grounding type 3-pin
power outlet. If you are unable to insert the plug into an existing outlet, con­tact an electrician to install a properly grounded 3-pin power outlet, prefer­ably that with OFI / CFI protection, if available.

5. DAMAGE REQUIRING SERVICE

This unit should be repaired or serviced by qualified personnel whenever:

· The AC power cord has been damaged, or

· Objects have fallen or liquid has spilled into any TD-1 unit, or

· The unit does not function properly or exhibits a marked change in perfor-

· The unit has been abused, dropped, or damaged, or

mance, or

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· The unit has been exposed to rain or moisture

6. SERVICING

Lethal voltages are found inside the TD-1 chassis. The user should
not attempt to repair or service this unit. All servicing and/or repairs should
be referred to Millennia.

If, after reading all instructions, precautions, and warnings, you have re­maining questions, please contact Millennia directly before attempting to
use your TD-1. Retain this owner’s manual as a record of your purchase to
aid positive identification in the event of loss.

Before connecting power to the TD-1, assure that the rear panel voltage
selection fuse block switch is set correctly. In the USA 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
change both fuses to the correct types. See “Rear Panel” instructions for
proper fuse requirements.

The TD-1 enclosure measures approximately 8.5" wide x 3.5" high x

13.5" deep and is designed for mounting (in pairs) into a standard 2U,
19" equipment rack. If the TD-1 is mounted in a road case or other rack
which is prone to strong vibration or shock, it is highly recommended that
the rear of the TD-1 be supported or otherwise reinforced to withstand
such conditions. TD-1 contains high voltage vacuum tube and discrete
transistors, many running in Class-A bias. As such, the TD-1 TWIN
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, do not defeat
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
thoroughbred design is not achieved without certain operating criteria.
Back-to-back Zener diodes protect the super-matched discrete bipolar
input transistors against high transient energy spikes common when
inserting and extracting XLR connectors. To maintain top performance
and protect the TD-1’s sensitive HV-3 front-end, it is advised that you do

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not insert or extract XLR connectors with power on. Get in the habit of
disabling AC power and waiting about ten seconds for the phantom
power to fully “ramp down” before inserting or removing a microphone.
This is good advice for protecting your microphone investments, as well.

DESIGN

The TD-1 TWIN DIRECT is a collection of core Millennia products
designed into a sophisticated recording channel + direct box. We
believe TD-1 is the world’s most versatile and absolutely best sounding
DI (direct injection) box — and much more. TD-1 offers numerous signal
path topologies (vacuum tube, discrete transistors, monolithics, three
different audio transformers, speaker soak, REAMPs, etc.) all sonically
optimized to their respective strengths.

TD-1 offers Twin Topology DI input stages which can be switched to
employ high voltage vacuum tube (12AT7) -or- 100% discrete transistor
(J-FET) amplifiers. The user may also select low, medium, or high input
impedance on both input topologies, making TWIN DIRECT the most
versatile DI available. The TD-1 also offers two bands of Millennia’s
acclaimed NSEQ-2 fully parametric equalization, used by top mastering
facilities around the globe, fully sweepable from 20 Hz to 25 kHz. The
NSEQ-2 bands are provided for high-resolution audio sculpting of
instruments such as guitar, bass and keyboard, or artistic and corrective
work — adding “air” and “punch,” removing “mud,” and so forth — all with
the natural, artifact-free audio qualities NSEQ is known for. Numerous
functions and routing paths are available, as noted by name:

1.) HV-3 discrete hybrid solid state microphone preamplifier (option)

2.) STT-1 ORIGIN vacuum tube DI Input with selectable impedances

3.) Class-A biased discrete J-FET DI input with selectable impedances

4.) NSEQ-2 dual band fully parametric equalizer, 20 Hz - 25 kHz

5.) Patented REAMP® dual guitar simulation outputs (Strat & Les Paul)

6.) Numerous Ground-Lift and Ground-Isolation switches and jumpers

7.) SPEAKER SOAK

8.) Audiophile-grade headphone output with level adjustment

9.) Class-A biased discrete solid-state FET output stage

10.) High performance DIT-01 output transformer, 3 Hz - 300 kHz

TWIN DIRECT has four available audio inputs:

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guitar amplifier Input Selection