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, (10701-10702)
  PVC, Ø 5.8mm, (10801-10802)
2 = Shield No. 1: Bare copper wires (0.10 mm) 100% coverage
3 = Shield No. 2: Bare copper wires (0.10 mm) 100% coverage
4 = Viscose fiber coat: Counter wrapped to the twisted triple
5 = Insulation (cond): PVC, Ø 1.2 mm, white, brown and green, twisted triple
6 = Conductor: Stranded bare copper wires 96 x 0.05 mm (0.19mm²) 96x44 AWG = 24 AWG

Technical Datas:

Conductor resistance:    < 90 ohm/km
Shielding resistance:    < 20 Ohm/km
Capacitance: cond/cond:  < 150 nF/km
  cond/shield:  < 240 nF/km
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. Type Type Colour Spool Size Weight/
 Shipping Unit
10701 GAC-3 balanced 3 conductor 5.0 mm darkgray 100m 4.20 kg 4x100m
10702 GAC-3 balanced 3 conductor 5.0 mm black 100m 4.20 kg 4x100m
10801 GAC-3 balanced 3 conductor 5.8mm 5.8 mm black 100m 5.15 kg 4x100m
10802 GAC-3  balanced 3 conductor 5.8mm 5.8 mm brown 100m 5.15 kg 4x100m

Retail Prices July 2022:

Analog Cables Length/
Color **shipping unit CHF (Swiss Francs) Export EUR
per Rolle *per Meter per Rolle *per Meter
GAC-3 balanced 3 conductor 100 m black/dark gray  4x100m 201.45  2.55 178.15  2.25
GAC-3 balanced 3 conductor  100 m black/brown  4x100m 214.60  2.70 189.75  2.40

Please inquire via contact and avoid entering all datas. You can also simply send us an email to

Please see ordering Information link:
Terms: Prices are in CHF (Swiss Francs), this price is including Swiss Domestic 7.70%  VAT. Ex works Dietikon Switzerland. Packing and crate included. You can collect your order in Dietikon w/o any shipping fees.

Sold per meter and standard spools from Swiss warehouse.  *Price per meter only charged if not a full spool was ordered.

- Shipment from stock in Switzerland:  we can ship from Swiss sales office in Dietikon Switzerland. No minimum Order
Orders from Swiss warehouse can consolidate other products from our domestic range (such as connectors) and cables could be cut to order and/or even terminated with connectors.

Check possible remnant spools/leftover pieces at special prices from Swiss warehouse!
Link to Sale items

- shipment from warehouse in Germany:  stored in bonded warehouse c/o Streck Transport GmbH in Freiburg (Germany). Attention: German clients and EC clients w/o UID (Vat identification) number will be charged with 19% German VAT in addition! Minimum order for shipments from Germany warehouse is for each line item 1pc standard shipping unit or multibles thereof. Collections at warehouse possible by appintment only and with some restrictions.

**shipping unit/standard spool: The shipping units rules do only apply for orders being shipped from bonded warehouse in Germany. From our Swiss headquarters we can ship any quantity, per cut meter, full spool or shipping unit!

Full Pricelists (download) in Euro/US$ and CHF to be found here: Link

Please inquire via Contact and avoid entering all datas, you can simply send us an email to


Gotham Cables are available from our Swiss service lab soldered as per your desires.
Each cable is being made in our own service lab by our own staff at highest standards and to your specification.
Visit our soldering department here:  LINK 

Pricelist made up leads/Cable assemblies from Swiss servicelab

CHF CHF Made up Leads Retail price list updated Link

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 circuits. 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 plugged into a receptacle. 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 relief. This will give an extremely better (longer) lifespan of your cable.

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