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TR-2
DUAL CHANNEL TRANSFORMER BOX
DESIGNED & MANUFACTURED BY:
ASL Intercom B.V.
Zonnebaan 42
3542 EG Utrecht
The Netherlands
Tel: +31 (0)30 2411901
Fax: +31 (0) 30 2667373
Email: info@asl-inter.com
Web:
www.asl-inter.com
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INPUT SIDE
The TR-2 transformer box is equipped with two broadcast quality
600 : 600 ohm line transformers which can handle signal levels
up to +26 dBu. There are various input and output connectors
which makes this unit very versatile. Input or output ground may
be lifted.
The transformers are housed in a strong metal box, covered with
a plastic ‘skin’. This ensures the box cannot make conductive
contact with the metal housings of other equipment, possibly
causing undesirable ground loops.
The TR-2 transformer box may be very useful when:
- Connecting ENG equipment to a sound reinforcement
system
- Connecting a touring PA system to the ‘house-PA’
- Distributing audio signals over long distances
- Connecting non-professional CD or cassette players to a
professional system
- Connecting line outputs of instruments (keyboards) or
backline equipment (amps) to a mixing console
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OUTPUT SIDE
The input side of the TR-2 is equipped with one Neutrik Combo
connector (¼” stereo jack + XLR-3 female) and one RCA
connector per channel. The Combo and RCA connector of one
channel are paralleled. The output side is equipped with one
XLR-3 male connector per channel.
Each transformer is placed between the input side and the output
side. The presence of different connector types allows matching
between different standards (e.g. RCA or jack to balanced XLR,
or unbalanced XLR to balanced XLR).
The ground-lift switch on the output side has 3 positions. In the
center position the ‘grounds’ of the connectors on both sides of
the box are connected to the metal pieces of the box and to the
screen of the transformers. In the left position of the switch the
input side is ground lifted, in the right position the input side.
NOTE: The TR-2 transformer box is designed for low impedance
(line level) signals. It can’t be used for high impedance signals,
such as the ones from instrument pick-ups, in which case an
active or passive DI-BOX should be used.
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TECHNICAL SPECIFICATIONS
Max Output Level
(THD = 0.5%, f = 50 Hz, Source = 50
ohm, Load = 600 ohm)
+26 dBu
Frequency Response
(Load = 600 ohm, Source = 50 ohm)
12 Hz – 40 kHz (+/- 0.25dB)
Total Harmonic Distortion
(20 Hz – 20 kHz, Source = 50 ohm)
<0.02% at any output level up to 0 dBu
<0.03% at any output level up to +10
dBu
ASL reserves the right to alter specifications without prior notice.
Insertion Loss
(Load = 600 ohm, Source = 500 ohm)
1.6 dB
Common Mode Rejection Ratio
(Load = 600 ohm, Source = 50 ohm)
at 50 Hz: 78 dB
at 1 kHz: 69 dB
at 20 kHz: 42 dB
Dimensions
42 x 86 x 132 mm
Weight
700 grams
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