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I'm so glad I was able to find a site to download my missing manuals. Very reasonable prices and they kept me informed about the process and I had my manual within less than a day. The only thing I wish was an option is a 100% English version with no spanish or anything. But overall great site.
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The manual is complete with excellent quality! One suggestion, show number of pages and weather it is multi-lingual. The AD 600 Manuel is about 76 pages and over half is non English. This results in a larger print job than usually needed. Having this information, one could select the desired pages for printing.
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I've been looking for a copy of the original user/owner manual. Just what the doctor ordered, thank you.
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the manual was very helpful thank you very much no one else was able to help me thanx
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This is an excellent handbook. We had no information on the appliance until we obtained this and are now able to use the appliance to its full potential. Strongly recommended.
400RB Series Sound Tips
The 400RB Series has several unique features which, if used properly, will obtain that sound you have been searching for.
Sound Tips
The Equalizer:
The Equalizer is used to fine tune your sound. When adjusting it, do it just a little at a time. These are active circuits, and small changes can make a big difference in your sound. With a little experimentation you will find that this equalizer is very easy to use, never sounds weird and provides you with a large variety of great sounds, unique to GK.
Boost/Master:
Turning up the Boost control, will add a little growl to your tone. This is an unmistakable GK trade mark sound, that you will grow to appreciate. Raising the Boost while lowering the Master will add more growl while keeping the sound level the same. Growl is actually a small amount of even order harmonic distortion, that sounds great through a woofer. For most playing situations, the Master is set between 12 & 3 o�clock. The cleanest sound is obtained by setting the Master above 12 o�clock, and going above 3 o�clock for maximum power situations.
Contour:
Increasing the Contour level will scoop out midrange frequencies while boosting the highs and lows. The sound, once again, is unique to GK and unavailable on any other Bass amp.
Direct Out:
The 400RB provides a low noise, high quality balanced direct out for connection to PA and recording consoles. With the Pre/Post EQ switch set to �Pre� (Out), the direct output signal is fed directly from our low noise, high headroom, FET input stage providing a low noise output superior to external direct boxes and impedance transformers. The Direct Output signal is only effected by the -10dB Pad, and Tuning Mute controls. This allows you to adjust your tone and volume on stage without changing the Direct Out signal level and confusing your sound man. Changing the Pre/Post EQ switch to �Post� (In), sends the �GK sound� and preamp response to the Direct Out jack. This gives you complete control over the Direct Out�s tone and volume. In addition, a Ground (Gnd) Lift switch is included to remove hum and buzz when connecting to equipment powered by a different ground system.
String Bass:
The way a Bass amp deals with the instrument low string is a critical part of it�s sound. In fact, a five string instrument requires an entirely different low end response than a four string instrument. No equalizer can make the necessary adjustments to accommodate both. However, the String Bass button on the 400RB Series does just that. When it is out, the 400RB is voiced like the 800RB (the world�s classic four string amp). Push it in and the 400RB is voiced for five string instruments. For some playing styles you may want it in, even with a four string instrument.
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