ART Pro Audio DTI User Manual

Dual Transformer / Isolator

Artcessories

User's Manual

IMPORTANT SAFETY INSTRUCTION – READ FIRST

This symbol, whenever it appears,
alerts you to the presence of
uninsulated dangerous voltage
inside enclosure-voltage that may be
sufficient to constitute risk of shock.

Read Instructions: Retain safety and operating instructions for
future reference. Heed all warnings printed here and on the
equipment. Follow the operating instructions printed in this us er
guide.

Do not open: There are no user serviceable parts inside. Refer
any service work to qualified technical personnel only.

Grounding: Only connect the unit to equipment with properly
grounded mains power. Do not defeat the grounding and
polarization means of the power cord plug of the connected
equipment. Do not remove or tamper with the ground
connection on the power cord of the connected equipment.

Environment: Protect from excessive dirt, dust, heat, and
vibration when operating and stori ng. Avoid tobacco as h, drink
spillage and smoke, especially that associated with smoke
machines.

Handling: Protect the controls from damage during transit. Use
adequate padding if you need to ship the unit. To avoid injury to
yourself or damage to the equipment, take care when lifting,
moving or carrying the unit.

Servicing: Refer servicing to qualified technical personnel.

This symbol, whenever it appears,
alerts you to important operating
and maintenance instructions in
the accompanying literature.
Please read the manual.

Installation: Install the uni t in accordance with the instructions
printed in the user guide.

INTRODUCTION:

Thanks for purchasing Applied Research and
Technology’s Dual DTI. The DTI (Dual
Transformer/Isolator) is a high quality totally passive
audio interface that uses a pair of high performance
transformers to totally separate input and output signal
grounds, thereby isolating two systems and reducing
hum and ground-loop noise. The DTI's audio
transformers have an extremely flat and wide frequency
response and can handle high signal levels while
maintaining an isolated balanced output. This gives the
DTI a very clean and neutral sound with a wide variety
of signal sources. The transformers are wound for 1:1
unity gain and are designed to be used with impedances
from 600 ohms to 100 kohms.

What further sets the DTI apart from other lesser
isolation boxes is it's connection versatility. We have
provided XLR, 1/4-inch phone, and RCA type phono
connections on all inputs and outputs. This allows the
DTI to easily fit into virtually any audio system and
breathe clean patch point between all types of the
systems.

Signal Flow Chart

SPECIFICATIONS:

Frequency Response: 10Hz-50kHz +/-.5dB@

+4dBu
THD: .01% Typical @ 1kHz,
+18dBu, <.05% @ 100Hz,
+24dBu
Insertion Loss: .4dB@100k Ohm load,

5.5dB @ 600 Ohm load

Input Connections: XLR female balanced,

1/4-inch TRS balanced /

unbalanced, and RCA jacks
Output Connection: XLR male balanced, 1/4-inch
TRS balanced / unbalanced
and RCA jacks

Power requirement: Passive
Dimensions HxWxD(in): 1.75 x 4.2 x 3.5
HxWxD(mm) : 44.5 x 107 x 89

Weight (lbs/kg): .75 / .34

WARRANTY INFORMATION:

Limited Warranty (USA only)

Applied Research and Technology will provide warranty
and service for this unit in accordance with the following
warrants:
Applied Research and Technology, (ART) warrants to
the original purchaser that this product and the
components thereof will be free from defects in
workmanship and materials for a period of three years
from the date of purchase. Applied Research and
Technology will, without charge, repair or replace, at its
option, defective product or component parts upon
prepaid delivery to the factory service department or
authorized service center, accompanied by proof of
purchase date in the form of a valid sales receipt.

Exclusions

This warranty does not apply in the event of misuse or
abuse of the product or as a result of unauthorized
alterations or repairs. This warranty is void if the serial
number is altered, defaced, or removed.
ART reserves the right to make changes in design or
make additions to or improvements upon this product
without any obligation to install the same on products
previously manufactured.
ART shall not be liable for any consequential damages,
including without limitation damages resulting from loss
of use. Some states do not allow limitations of incidental

or consequential damages, so the above limitation or
exclusion may not apply to you. This warranty gives you
specific rights and you may have other rights, which
vary, from state to state. The warranty terms listed
above are only valid within the United States of America.
For units purchased outside the United States, an
authorized distributor of Applied Research and
Technology will provide service. For information on
warranty and service policies outside of the U.S., please
contact your local distributor.

Please fill in the following information for your reference:

Date of purchase: _________________________
Purchased from: _________________________

SERVICE:

The following information is provided in the unlikely
event that your unit requires service.

1. Be sure that the unit is the cause of the problem.

Check to make sure that the unit has power
supplied, that all cables are connected correctly,
and that the cables themselves are in working
condition. You may want to consult with your dealer
for assistance in troubleshooting or testing your
particular configuration.

2. If you believe that the ART unit is at fault, go to

www.artproaudio.com. Select "Support", then

"Return Authorization Request" to request a return
authorization number.

3. If you are returning the unit for service, pack the

unit in its original carton or a reasonable substitute.
The original packaging may not be suitable as a
shipping carton, so consider putting the packaged
unit in another box for shipping. Print the RA
number clearly on the outside of the shipping box.
Print your return shipping address on the outside of
the box.

4. Include with your unit: a note with the RA number

and your contact information, including a return
shipping address (we cannot ship to a P.O. box)
and a daytime phone number, and a description of
the problem, preferably attached to the top of the
unit. Also include a copy of your purchase receipt.