Contact DeliveryMost Popular
GB4000 + SR4 Combo
The GB4000 paired with the SR4 30 MHz linear amplifier. Up to 15W variable contact output — 75× more powerful than most competing contact instruments — with four hookup sets supporting multiple simultaneous users.
SR4 Specifications
SR4 power output1–15 watts variable
vs competitorsUp to 75× more powerful
ConnectionSingle BNC cable to GB4000
Hookup sets4 sets · 8 connection points
Multiple usersYes — outputs connected together
Operating24/7 · no overheating
Frequency range1 Hz – 20,000,000 Hz
Channels2,000 · 873 pre-programmed
Why add the SR4?
The GB4000 alone is 10–15× more powerful than most alternatives. The SR4 takes that to 15W variable — the most powerful contact frequency instrument available today.
15W output — 75× more powerful than most contact devices
Four hookup sets for multiple users simultaneously
Single BNC cable setup — straightforward connection
All GB4000 multi-frequency and channel features active
Includes NZ-made stainless steel hand cylinders and foot plates
Runs 24/7 without overheating
Prefer non-contact?
The M.O.P.A. broadcasts at up to 190W through the air — no electrodes, 30+ foot range.
See the GB4000 + M.O.P.A. →Disclaimer: The GB4000 is a frequency generator and not a medical device. For educational purposes only.