GAC-3 Ultraflexible 3-conductor microphone cable (Neumann wire) 1070x/1080x

GAC-3 (10701/10702) 3 Conductor Microphone Cable!
GAC-3 , 5.8mm  (10801/10802) 3 Conductor Microphone Cable large diameter!
also known as the Neumann/Gotham Microphone Cable

now in bown available
Balanced double shielded analoge audio cable! Legendary vintage "Neumann cable" construction.
Industrial exklusive 3 conductor construction for Microphone, only available from Gotham Audio.
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.
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)

Paper from "Neil A Muncy" (AES Member) 
Noise Susceptibilty in Analog and Digital Signal Processing Systems Presented at 97th AES Convention San Francisco November 1994 Revised April 13, 1995 Journal of the Audio Engineering Society Vol 43 #6 June 1995 p.435-453

AES paper:Neil A Muncy


1 = Jacket: PVC, Ø 5.0mm / 0.19in, (10701-10702)
  PVC, Ø 5.8mm / 0.23in, (10801-10802)
2 = Shield No. 1: Bare copper wires (0.10 mm / 38AWG) 100% coverage
3 = Shield No. 2: Bare copper wires (0.10 mm / 38AWG) 100% coverage
4 = Viscose fiber coat: Counter wrapped to the twisted triple
5 = Insulation (cond): PVC, Ø 1.2 mm / 0.05in, white, brown and green, twisted triple
6 = Conductor: Stranded bare copper wires 96 x 0.05 mm (0.19mm²) / 96x44AWG (24AWG)

Technical Datas:

Conductor resistance:    < 90 ohm/km / < 24.4Ohm/1000f
Shielding resistance:    < 20 Ohm/km / < 6.1Ohm/1000ft
Capacitance: cond/cond:  < 150 nF/km / < 45.7 nF/1000ft
  cond/shield:  < 240 nF/km / < 73.2 nF/1000ft
Characteristic impedance: at 10 kHz: 150 Ohm
Test voltage: cond/cond:  500 veff
  cond/shield:  2000 veff
Operating voltage:    low voltage
Temperature range: flexi-installed: -5° to +50° C
  fix-installed: -30° to +70° C

Ordering Information:

Order No.
Spool Size
10701 GAC-3 5.0 mm / 0.19 in darkgray 100m/328ft 4.20 kg/9.1lbs 4x100m
10702 GAC-3 5.0 mm / 0.19 in black 100m/328ft 4.20 kg/9.1lbs 4x100m
10801 GAC-3 5.8mm 5.8 mm / 0.23 in black 100m/328ft 5.15 kg/11.3lbs 4x100m
10802 GAC-3 5.8mm 5.8 mm / 0.23 in brown 100m/328ft 5.15 kg/11.3lbs 4x100m

Retail Prices:

Order No. Analog Cables Length/
Spool metric
Color **Export shipping unit USD  (USCS) USD (metric)
per spool * per ft per spool * per meter
GAC-3 100 m 328 ft black
4x100m 311.60 0.95 311.60 3.12
GAC-3 (5.8mm)
NEW now in bown available
100 m 328 ft black
4x100m 328.00 1.00 328.00 3.28

please ask for a quotation here: (link)   

Please indicate your address and details, indicate product and quantity and requested delivery date.

How to wire 3-Conductor cables to XLR connectors:

3 Conductor cables 10701/10801  will best be wired/soldered as follows:

Each conductor to each Pin:  Pin1= green plus shields, Pin2= brown (Signal+),  Pin3= white (Signal -). Put each a few strands of each layer of the shields together with the green conductor to the ground Pin 1.
Cut away any spare strands from the shields and secure that no loose strands are hanging around. Use a shrinking tube to avoid short ciricuits. We do not recommend to put any ground to the body shell on either side of your XLR line. The connector shell will get to ground once pluged into a recepacle. The round construction of a 3 conductor cable will give many more moving cycles to your interconnect cable as the perfect round cable will distribute/allow any movement in any direction of the cables bending point at the connectors strain releif. This will give an extremly better (longer) livespan of your cable.

RCA/Phono/Jack unbalanced wiring: Many clients use our 3 conductor perfect round cable also for unbalanced interconnects. In thgis case we recommend to only use 1 conductor (brown) for you signal and put all other wires or parts tereof to ground with the shields. this will increase your noise protection! However for umnbalanced application we do have our perfect unbalanced wires 1001x, and 1000x.