HORN BI-AMP OPERATION:
Unique Horn Bi-Amp system sends the high frequencies to the horn through a separate 50W amplifier. This has many advantages: The horn level is controlled from the front panel. The horn is not overpowered by the larger amp so failures are reduced. When the woofer amp hits the rails (growl) the horn stays clean.
Bass players have always liked the growl they get from a slightly overdriven power amp. The problem is that growl sounds great through woofers but will destroy the horn (tweeter). In a typical full range system, there is no way to get that growl while keeping the definition that the horn provides. In GK’s Horn Bi-Amp system, an active (electronic) crossover allows a full range signal through to the main (woofer) amplifier, while only the high frequency portion of the signal (5kHz and above) is allowed through to the 50 watt horn amplifier
THE VALVE EFFECT (BOOST):
Your GK amplifier incorporates what we call the Valve Effect, or G.I.V.E (Gate Induced Valve Effect technology). We use field effect devices with the gate biased in such a way that emphasizes the optimum harmonic content of the signal. This is controlled by the Boost knob. Raising the Boost while lowering the Master will add more growl while keeping the sound level relatively consistent. The ‘growl’ is actually a small amount of even order harmonic distortion. For most playing situations, start with the Boost at 12 o’clock. Reduce for a cleaner sound or increase for more growl.
The equalizer in GK amplifiers is unique in the industry and reflects over 30 years of continuous development and refinement. We’ve developed a rotary, four-band, active equalizer optimized for bass guitar. The active circuitry allows you to either boost or cut at a given frequency with greater integrity in signal reproduction. The treble is a shelving type control that boosts the high frequencies evenly. Respectively, the bass is a shelving control that evenly boosts the low frequencies. The high mid and low mid are peak (band pass) type controls with fairly wide Q (bandwidth) patterns which are much more ‘musical’ sounding. Each of the four bands are connected in series, meaning the output of the first band is fed directly into the input of the next and so on. This eliminates the rippling or combing that can happen with parallel EQ circuits. The overall result from all of this is an equalizer that’s flexible, yet easy to use and sounds natural even at extreme settings.
4 band active EQ and voicing filters based on the classic 800RB provide extensive tone shaping capability.
Balanced DI with level control, Pre/Post and Ground Lift switches to feed the house, Tuner output, FX Loop for connecting outboard accessories on the front. And two ¼ inch speaker jacks and two twist lock speaker connectors to ensure reliable and safe cabinet connections, mounted in the rear.
Analog power amp and power supply deliver classic feel and 700 Watts of hard hitting punch.
Double sided boards ensure stable performance under the most rigorous tour conditions.
Boost control adds tube like harmonics and signature "GK growl" using G.I.V.E. technology.Big Iron
Analog power amp and toroidal transformer provide the current required to control the speakers at high volume.
Inherited from the 800RB, this unique design varies the EQ bandwidth to retain a musical response even at extreme settings.