headway EDB-2 VAP - 3.2 Input Cable and Leads Notes; Cable Shielding and Interference

3.1.4 MIC INPUT XLRs CHANNEL 1 and 2 - Impedance < 3.4k
Ohm. XLR input accepts dynamic, ribbon, condenser, silicon
condenser and electret condenser microphones, with On/Off Switch
and phantom power (48v & 10v). See: Microphone Inputs 8.1.2
3.2 INPUT CABLE / LEADS NOTES
Suitable jack leads as used to the Input of the EDB-2 VAP should
have at least 80% screening, preferably braid shielded (not to be
confused with woven braided jacket outer) or, at least, conductive
plastic shielding with extra extensive lapped screening to minimise
hum and radio interference
Denmark can have a particular problem with hum when using mains
electricity to run a sound system. This is because there is no mains
earth, therefore everything has to be exceptionally well shielded,
particularly at high impedance
3.2.1 LEADS FOR PASSIVE PICKUPS - For the highest
impedance passive pickups such as piezo cable or film pickups, we
recommend using cables 2m (6') max. of standard quality (e.g. Klotz
or Van Damme), and 3m (9') of low capacitance cable, (e.g.
Sommer Cable) into pre-amp input
Headway offers Sommer Cable jack leads with quality lightweight
jack plugs
For high impedance passive piezo pickups, such as piezo ceramic
or Headway's popular "The Band2", we recommend the use of
quality cables of 3-5m (9'-15') max. to EDB-2 VAP
P. 31