Duncan TARA Manuale d'uso - Pagina 3

Sfoglia online o scarica il pdf Manuale d'uso per Amplificatore per strumenti musicali Duncan TARA. Duncan TARA 8. True acoustic response amplifier

Introduction

Congratulations on your purchase of the Seymour Duncan True Acoustic Response

Amplifier. This amplifier has been crafted specifically to fill the needs of the acoustic

guitarist. Every feature has been specifically chosen to give you an unprecedented

amount of control over your sound while allowing the flexibility to handle virtually any

playing situation. It is truly a performance system design.

The cabinet and speaker system were designed to hi-fi standards, providing very flat

transparent sound with an extended bottom end. Each of the two channels will accept

three inputs (Mic, Instrument, & Effects Return) while allowing incredible tone shaping

with two sets of 5-band graphic equalizers and a contour switch. Anti-feedback controls

in both channels have been optimized to allow very high sound pressure levels without

annoying feedback. You can play guitar through one channel, sing through the other,

and mix your drum machine in through one of the three-buffered effects loops. In short,

we think you will find your TARA amplifier has the flexibility to handle any playing

situation, from solo club gigs to studio work.

A Discussion on Feedback

An acoustic guitar, which sounds warm, rich and responsive when, played without

amplification can feedback annoyingly when amplified. The sound from the speakers

interacts with the guitar's natural resonance to cause feedback. There are two

dominant resonant sources, the air cavity and the soundboard. The air cavity is the

lower of the two, generally falling around 100Hz. The soundboard, which produces 90%

of the guitar's acoustic output, resonates around 200Hz.

Our T.A.R.A

. amplifier has several features which are designed to control unwanted

feedback. Each channel has a phase switch and a notch filter with variable frequency

and depth. Generally, the phase switch is used to knock out the air cavity resonance of

the guitar and the notch filter is used to control the soundboard resonance. The phase

switch inverts the polarity of the amplifier's output relative to the resonance of the guitar.

Changing the phase of the output signal can effectively control the low frequency air

cavity resonance, although in very loud settings you may actually need to block the

sound hole. The notch filter is very useful in controlling soundboard feedback. Once

the notch filter is "tuned" to your guitar's soundboard, the depth control can be used to

cut more or less depending on how loud you are playing. You only want to notch out

"just enough" to control feedback so that the guitar retains as much of its acoustic

characteristics as possible. Proper use of the phase and notch controls will allow you to

play at high volume levels without feedback and without unduly compromising the

natural timbre of your instrument.