Datasheet

audio
Ultraflexible 3-conductor microphone cable
The European Choice in Professional Audio Wiring double shieldeddouble shielded
Construction
Technical Specifications
Ordering Data
GAC-3
Order No. Type ø mm Colour Spool Size Weight /Spool Shipping Unit
10701 GAC-3 5 grey 100 m 4.1 kg 4 x 100 m
10702 GAC-3 5 black 100 m 4.1 kg 4 x 100 m
10801 GAC-3 5.8 black 100 m 5.1 kg 4 x 100 m
10899 GAC-3 5.8 brown 250 m 12.7 kg 2 x250 m
Conductor resistance < 95 Ohm /km
Shielding resistance < 20 Ohm /km
Capacitance cond /cond < 150 nF /km
Capacitance cond /shield < 240 nF /km
Characteristic impedance at 10 kHz 150 Ohm
Test voltage cond /cond 500 V eff.
Test voltage cond /shield 2000 V eff.
Operating voltage low voltage
Temperature range (flex) - 5° to +50° C
Temperature range (fix) -30° to +70° C
Why three conductors for an audio signal? Here are some answers:
Grounding/shielding: With the third conductor put to ground, together with the two shields, we have increased
RF-rejection to 115dB (20dB better than standard) at 25 kHz. This fact has also been conformed at the AES-paper
held by Mr Neil A. Muncy ("Noise Susceptibility in Analog + Digital Signal Processing Systems") in November 1994.
The GAC-3 was named the best performing microphone cable available.
Round Construction: 3-conductor constructions are round constructions, and since the cable has the freedom to
move in all directions, especially on the strain relief of a connector, the cable will survive more movement cycles.
Phantom Power: The 3rd conductor can be wired as a drain wire for a reliable connection of phantom power to the
microphone without affecting the shield.
Each of the three conductors consists of 96 (!!) strands of 0.05mm copper wires being the finest stranding for audio
cables available which gives you improved flexibility, better signal transport and longer lifetime (moving cycles).
(Heavy duty version with 5.8mm Ø also available).
1 Jacket PVC, ø 5.0 mm (10701 - 10702)
PVC, ø 5.8 mm (10801 - 10899)
2 Shield No. 1 Bare OF copper wires (0.10 mm), 100% coverage
3 Shield No. 2 Bare OF copper wires (0.10 mm), 100% coverage
4 Viscose fiber coat Counter wrapped to the twisted triple
5 Insulation (cond.) PVC, ø 1.20 mm, white, brown and green, twisted triple
6 Conductor Stranded bare OF copper wires, 96x0.05 mm (0.20 mm²)
other c u available!
Contact
orlso
www.gotham.ch
Microphone
Cables
Microphone wiring diagram (Quad wiring)
GAC-3 XLR-Connector
1 = green pin 1
2 = brown pin 2
3 = white pin 3
4 = screen pin 1
1
GAC-3 MICROPHONE
2
3
4
+
-
brown
white
green
put screens + green line together