Radial Engineering Twin-Iso Users Manual

Order No. R800 1024

T W I N - I S O™ L I N E I S O L AT O R

The Radial Twin-Iso is a balanced 2 channel, +4dB line-level isolator that has been
specifi cally developed for professional touring systems as a means to eliminate hum and
buzz caused by ground loops when interfacing various equipment such as two consoles,
remote towers and drive racks.

Central to the Twin-Iso is the use of Jensen audio transformers, world-renowned for their
sound quality. These assure the very best signal transfer without distortion caused by
saturation or phase shift. All connections are balanced XLR following the AES standard with
pin-1 ground and pin-2 hot. To add versatility, a polarity reverse switch is provided for each
channel to ensure absolute phase is maintained throughout the audio signal path.

The Twin-Iso uses the same compact 14 gauge steel enclosure as our DI products, ensuring
it will fi t anywhere and last for years. The Radial J-Clamp offers a tidy way to mount a Twin­Iso in discrete places like under a conference table. Up to eight may be rackmounted in just
two 19” rack spaces using the Radial J-Rak. The Radial Twin-Iso is a simple yet extremely
effective tool for the professional audio engineer and system designer.

R a d i a l S m a r t S h e e t

Features

• Jensen transformer-equipped for optimum sound quality

• Transformer isolation eliminates ground loops

• +4dB line-level with up to +22dB signal handling

• Phase reverse switch for each channel

Applications

• Sub-mixing two consoles together

• Mixer to a remote amp rack or speaker tower

• Mixer to recorder or broadcast feed

• Between professional VTR and PA system

Cool stuff

• Handles huge transients without distortion

• Completely passive, no power needed

• Eliminates hum and buzz caused by ground loops

• Dual-mono or stereo operation

• 3 year transferable warranty

GROUND LIFT SWITCH
disconnects XLR pin-1 on both
INPUT-1 and INPUT-2.

LINE-LEVEL INPUTS +4dB
balanced input, AES standard with
pin-1 ground and pin-2 hot.

FULL BOTTOM PAD improves
electrical isolation and keeps the
Twin-Iso from moving around.

LINE-LEVEL OUTPUTS +4dB
isolated & balanced output, AES
standard with pin-2 hot.

POLARITY REVERSE fl ips the
polarity from pin-2 to pin-3 on the
XLR for signals that may be out of
phase.

BOOK-END DESIGN enclosure
creates a protective zone around the
switches & connectors.

JENSEN audio transformers
provide 100% isolation to elimi­nate noise caused by ground
loops, and they sound great!

Typical application
Sub-mix the outputs of one mixer into a second mixer.

R a d i a l E n g i n e e r i n g L t d . · T el: 604-942-1001 · Fax: [phone] · www. r ad i a l e n g . c o m · e m a i l i n f o @ r a d i a l e n g . c o m

R a d i a l S m a r t S h e e t © 2 0 0 6 S u b j e c t t o c h a n g e w i t h o u t n o t i c e .

HEAVY-DUTY WELDED I-BEAM
enclosure of 14 gauge steel makes
it impossible to torque the PC board.
Eliminates cold solder joints.

ISOLATED XLR rugged glass-fi lled
nylon connectors for true dual chan­nel operation.

HIGH CYCLE SWITCHES are
rated for 20,000 operations.

MILITARY-GRADE PC board with
full ground plane to reduce suscepti­bility to RF noise.