Kustom Stereo Amplifier Dual 30 RC User Manual

OWNER'S MANUAL  
Dual 30RC  
Congratulations on the purchase of your new Kustom amp! Your Dual 30RC model  
successfully draws on more than 30 years of amplifier design and manufacturing  
experience at Kustom. This amp was planned from the ground up by our engineers to  
offer top-notch tone and dependable performance. Inside this manual, you'll find useful  
information about the amp's features and some suggested settings to illustrate its tonal  
capabilities. We wish you many years of enjoyment with your Kustom amplifier.  
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EQUALIZER  
MID  
LEAD  
RHYTHM  
LEVEL  
EFFECTS  
CD/TAPE  
INPUT  
GUITAR  
INPUT  
GAIN  
VOLUME  
LOW  
HIGH  
REVERB  
CHORUS  
HEADPHONE  
Dual 30RC  
CHANNEL  
SELECT  
PREAMP  
EFFECTS  
POWER  
LEAD  
RHYTHM  
USA  
UK  
ON  
OFF  
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3
4
5
6
7
8
9
10  
11 12 13  
14  
15  
16  
1.) CD/Tape Input - this 1/4" 3 conductor jack will allow you to plug in a CD player, tape or any other source  
to practice along with. It sums the left and right signals into a mono signal. To control the volume of the  
source, adjust the output volume of the device. We suggest you turn the volume all the way down then  
plug in and adjust the volume according to your taste.  
2.) Guitar Input Jack - this is a 1/4" 2 conductor input jack for plugging in your instrument. It is intended for  
guitars but will accept other instruments as well.  
3.) Lead Gain - adjust this clockwise to increase the amount of distortion you add to the overdrive signal.  
Used in the lower ranges of the control, you get a less distorted sound, a "bluesy" tone. As you increase  
the gain, you add tremendous amounts of distortion to the signal for a harder edged "crunch" tone.  
4.) Channel Switch - this switch selects which preamp you are using. It will switch between the Rhythm and  
Lead channels.  
5.) Lead Volume - this control is the output volume control for the Lead Channel. It follows the same tone  
circuit as the other channel. It's gain structure is determined by the lead gain control but this serves as the  
overall master volume for this channel.  
6.) Rhythm Level - this is the volume control for the clean channel. It's gain structure is preset for maximum  
signal before distortion and determines the output level of the amp.  
7.) Bass - this control is the bass control. It is passive and set to shelve frequencies at 65 Hz. This will effect  
the low frequency signals. Turning it fully clockwise, the signal is left alone. Turning it counterclockwise,  
the lows will be rolled off.  
8.) Preamp Switch - this switch selects which preamp style you are using. It will switch between the classic  
USA warm sound or Brighter sound famous in the UK.  
9.) Mid - this control is the midrange control. It is passive and set to shelve frequencies at 1KHz. This will  
effect the middle frequency signals. Turning it counterclockwise, your signal will "hollow out" the mids  
which is popular in today's music.  
10.) High - this control is the high control. It is passive and set to shelve frequencies at 5KHz. This will effect  
the high frequency signals. Turning it fully clockwise, the signal is left alone. Turning it counterclockwise,  
the highs will be rolled off.  
11.) Reverb Level - this control adds the spring reverb and mixes it into the main signal buss. Reverberation  
creates a trail like effect with the sound. It lets the notes "hang in the air" longer, extending the sound.  
12.) Chorus On/Off Switch - this is the switch to turn on and off the chorus circuit.  
13.) Chorus Level - this is the Speed Control for the chorus circuit.  
14.) Headphone Jack - this is a 1/4" 3 conductor jack for plugging headphones. It will sum the signal and put  
the sound in both ears, thereby creating a pseudo-stereo sound. Volume will be determined by the volume  
control on the channel you are on. It will disconnect the internal speaker when plugged in. This will allow  
quiet practicing.  
15.) Jewel Light - this jewel light lets you know that the amplifier is on.  
16.) Power - this switch turns on and off the AC power to the amp.  
Back Panel - (not pictured)  
Speaker Out - this is a 2 conductor 1/4" speaker output jack. This will disconnect the internal speaker and  
allow an external speaker cabinet to be employed. Rating is 8 ohms.  
Line Output - this is a 2 conductor 1/4" line output jack. This will allow an external amplifier or mixing  
board to be supplied with the signal from this amp. This signal is attenuated and comes from the power  
amp.  
Effects Loop I/O - these are 2-2 conductor 1/4" jacks. This will allow an external effects device or  
equalizer to be patched back in before the power amp section in this amp. One is send and the other is  
return.  
Footswitch Jack - this is a 3 conductor 1/4" jack. This is for hooking up a footswitch to switch channels  
and to turn on/off the chorus.  
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Suggested Settings  
(These settings are general starting points. They  
are designed to get you close to the sound you  
are looking for. If the control is not shown, then it  
doesn't apply to this particular sound. )  
EQUALIZER  
MID  
LEAD  
RHYTHM  
LEVEL  
EFFECTS  
GAIN  
VOLUME  
LOW  
HIGH  
REVERB  
CHORUS  
CHANNEL  
SELECT  
PREAMP  
EFFECTS  
LEAD  
RHYTHM  
USA  
UK  
ON  
OFF  
Clean Rhythm or Country Guitar - these settings are the basic clean sounds and for general rhythm  
guitar, country lead guitar, and funky/chunky rhythm sounds. Usually, country guitar is a brighter, more  
trebly edged sound. The bottom end depends on what type of guitar you are using. Reverb and  
Chorus depends on taste.  
Rhythm guitar is mostly a clean full type of sound. A little less treble than the country sound and a bit  
more midrange. Reverb and Chorus, again depends on taste.  
EQUALIZER  
MID  
LEAD  
RHYTHM  
LEVEL  
EFFECTS  
GAIN  
VOLUME  
LOW  
HIGH  
REVERB  
CHORUS  
CHANNEL  
SELECT  
PREAMP  
EFFECTS  
LEAD  
RHYTHM  
USA  
UK  
ON  
OFF  
Blues Lead or Mellow Crunch - this setting is particularly useful in blues or softer rock songs and It  
is good for leads as well as rhythm parts. It is good for power chords in back of leads.You need to  
switch to the lead channel to make these settings work. Blues, depending on the guitar you use,  
usually adds treble but with more midrange and a "fat" bottom end. This setting does not have as  
much gain as full out crunch, adjust the gain control to the amount of distortion you desire. Blues  
usually has a reverb trail on the notes. Chorus is sometimes used to create a vibrato style sound.  
Adjust to taste.  
EQUALIZER  
MID  
LEAD  
RHYTHM  
LEVEL  
EFFECTS  
GAIN  
VOLUME  
LOW  
HIGH  
REVERB  
CHORUS  
CHANNEL  
SELECT  
PREAMP  
EFFECTS  
LEAD  
RHYTHM  
USA  
UK  
ON  
OFF  
Alternative/Harder Edged Rock - this setting will deliver more of a cutting tone. Whether used for  
rhythm or lead sounds, it will "cut" through the drums and get you heard. If you need more "grunge",  
increase the gain control for more distortion. This style of music requires a slightly thinner, harder  
edged tone full of midrange. Less reverb is required as it tends to muddy up faster songs but Chorus  
give the tone a fatter fuller sound. Adjust to taste.  
EQUALIZER  
MID  
LEAD  
RHYTHM  
LEVEL  
EFFECTS  
GAIN  
VOLUME  
LOW  
HIGH  
REVERB  
CHORUS  
CHANNEL  
SELECT  
PREAMP  
EFFECTS  
LEAD  
RHYTHM  
USA  
UK  
ON  
OFF  
Heavy Metal/Maximum Crunch - this setting is a good starting point for the "notched out middle"  
sounds associated with metal and heavy alternative sounds. Adjust the Treble, Lows, Reverb and  
Chorus to taste. Usually, for a rhythm tone, you want to have more lower end and less for leads.  
Distortion is an integral part of this style of music and this amp delivers it quite well.  
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