Calvary Audio Video Light Systems

Audio Video and Lighting Systems
Service Training Design Installation

Audio Video and Lighting system updates.
Complete New System Design and Installations.
Training on how to use the equipment you have.
Special Event and Vacation coverage for A/V staff.

Call, text or email today to schedule a site visit.

Blessings, Jeff Gefke




Quick way to setup Audio System Gain Structure

The Quick way to setup Audio System gain structure

  • Turn the amp input levels off
  • Turn the mixer Main output faders off
  • Use a test signal or program material that is constant on a mixer channel
  • Set channel input gain so the PFL readout  is around -0- unity
  • Turn off the PFL
  • Raise the main output faders until the main out level on the meters is about at -0- unity
  • Now raise the amp input levels until the clip indicators just come on and then back down a bit
  • Note do not  overload the speakers just to see the clip light come on, turn the amp up to the max level they can handle or is loud enough for the room. 
  • Run the main faders around 0 and mix with the channel faders as needed

By doing this the system is set for the best signal to noise, headroom and you know when the amps are at clip point by the main output meters on the mixer.

Note: Other devices in the signal path may be effected by this and need to be set for the level changes.

2012 Worship Tech Roundtable

Here is the overview of what we discussed at this years Worship Conference.

I will post a heading weekly and start the discussion with some product details and usage tips,

your comments and suggestions are welcome.

If you have a specific question and Need Help NOW send me a direct email to

Mixer Brands

  • Presonus
  • Yamaha
  • Soundcraft
  • Allen & Heath
  • Berringer

Sound Board

  • Setting gain Video link
  • Aanalog vs digital mixers
  • Setup operation
  • Pros/Cons
  • Mixer Location
  • Near Field Monitors


  • Sennheiser Headphones
  • Westone Earbuds

IEM Systems 

  • Aviom
  • Roland
  • Berringer
  • Hearback
  • In ear monitors advantages


  • Direct to Computer
  • Direct to Digital Recorder
  • Split direct from wireless receiver

Wireless Mics 

  • Sennheiser

Head Mics 

  • Countryman

Mics for stage pickup

  • RODE NT 1
  • PZM mics

Drum mics

  • PZM Plate mic Sennheiser, Shure

Stage Lighting 

  • Led lights color Temp
  • Conventional Lights
  • Ac and cooling requirements
  • Placement
  • Stage coverage zones

Lighting Control

  • Simple DMX Controlers
  • Difficultities with setup and operation
  • Elation
  • ADJ
  • ETC Element & Smartfade

HD VideoMixer

  • Atem Television Studio
  • NewTek Tricaster
  • RSG Roland…Edirol


  • WME
  • Flash

Video distro

  •  Video over cat5

Speaker Systems

  • Line Array vs Conventional
  • Speaker placement, coverage issues
  • Amp settings how to set input level


  • Bolts for mounting Hitachi projector


  • No Ground lifts
  • No Y cords

Recent Event, Worship Tech RoundTable

Recent Event, Worship Technologies Round table that took place in the coffee shop during the Calvary Chapel Worship Leaders Conference on Nov 12 2012.

Jeff Gefke from Calvary Audio was available to solve technology (and caffeine-deficiency) problems.

The Q&A session topics about Audio Video and Lighting will be covered in depth over the next few months on the cAVeMan Audio Video Light blog. The answers to real problems from real people (tech issues at least) will be presented and you will be able to contribute to the discussion.

Join in for the fun of learning what all those knobs really do and Select the Follow button to receive blog updates in your email.