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Resumen del manual
Hum and buzz are kept to a minimum by using direct current (DC) to operate the preamp heaters. This method of heater power is used in most professional audio equipment using tubes. One circuit of the preamp uses the classic "passive" type tone controls which tend to produce a flatter sound than the newer feedback type as used in the second channel. Because the passive tone networks tend to be less effective than the feedback type, we have provided more of these type controls to allow better control of the frequency spectrum, The right channel uses feedback type tone controls and is able to generate tremendous tonal variation with fewer knobs. To allow for all tastes, we have included BOTH types of tone circuits in your VTA. 1. The input jacks of your VTA are arranged in a unique switching circuit that allows added flexability in matching various input levels. Input "1" is the high gain input and should be used normally when plugging in your instrument. Input "2" is the low gain input and is to be used if the output from your instrument is overloading the high gain jack. When patching in the overdrive feature it is generally advisable to use the low gain jack of the preamp being overdriven. Due to the action of the switching circuit both jacks become automatically gain balanced when two instruments are plugged into jacks one and two of either channel. 2. The volume controls are used to vary the GAIN of the preamp. The setting of the volume control does not indicate output power, but rather is simply an indication of the sensitivity of the input preamp. It is possible to drive the amplifier to full power with very low volume settings if the output from the instrument is extremely high. The volume controls of your VTA are of the log (audio taper) type and most of the gain is obtained past the vertical (12:00 O'Clock) position, as in all professional sound gear. 3. The treble controls determine the amount of high frequency boost or cut in each channel:The control on the left channel is augmented by the high accent control. The feedback control on the right channel has tremendous boost and cut capability with only a single knob. 4. The bass controls determine the amount of low frequency boost or cut in cach channel. The bass control on the left channel is augmented by the low accent control. The feedback type bass control on the right channel is capable of extremely broad tonal variations with a single knob. 5. The low accent augments the bass control and allows selective boosting of the lower mid-range frequencies. 6 The high accent augments The treble control and allows selective boosting of the upper mid-range frequencies. 7. The presence control allows precise variation of the extreme гор end (treble) and tends to bring out the upper harmonics generated by any instrument. 8. The middle control enables the musician to precisely tailor the mid-range response for complete tonal balance. The middle control on the VTA represents much design ef...
Otros modelos de este manual:Instrumentos Musicales - VTA-800 (432.9 kb)
Instrumentos Musicales - VTA-400 (432.9 kb)
Instrumentos Musicales - VTA-800 (432.9 kb)