Audio Engineering

222 Chapter 7 The effect of these is to modify the frequency response of the system, at the HF end, as a result of signal curren ...

Preamplifi ers and Input Signals 223 7.18.2.1 Standard Tone Control Systems These are either of the passive type, of which a typ ...

224 Chapter 7 capacitors and is therefore free from any possibility of introduced distortion, whereas the “ active ” network req ...

Preamplifi ers and Input Signals 225 0.015μ 0.015μ 0.15μ 10 K 100 K 100 K 100 K 4K7 8K2 Ein 1K 1500 pF 0V Eout Figure 7.57 : Cir ...

226 Chapter 7 network attenuation, whereas the active system gain block will typically have a gain of unity in the fi at respons ...

Preamplifi ers and Input Signals 227 If such networks are connected across an inverting gain block, as shown in Figures 7.63(a) ...

228 Chapter 7 7.18.2.2 Slope Controls This is the type of tone control employed by Quad in its type 44 preamplifi er and operate ...

Preamplifi ers and Input Signals 229 characteristics, but the tonal preferences of the recording or broadcasting balance enginee ...

230 Chapter 7 In the Clapham junction type system, so named because of the similarity of the possible frequency response curves ...

Preamplifi ers and Input Signals 231 By this means it is possible, by combining elements of frequency lift or cut, to choose fro ...

232 Chapter 7 Because the ideal solution to this requirement—that of employing a group of parallel connected amplifi ers, each o ...

Preamplifi ers and Input Signals 233         100 K 100 K 10 K 100 K 10 K 10 K 22 K 10 K 0V 0V 0V 0V 100 K 470 K 0.22μ 47 ...

234 Chapter 7 While such types of tone control are undoubtedly useful and can make signifi cant improvements in the performance ...

Preamplifi ers and Input Signals 235     ‘L’ input ‘R’ input ‘R’ output ‘L’ output 2K2 2K2 100 μ 0V 1K 4K7 1K Relative gain ...

236 Chapter 7 There are also occasions when a deliberate reduction in the channel separation is advantageous, as, for example, i ...

Preamplifi ers and Input Signals 237 inductor–capacitor passive circuit layout, which allows adjustment of the HF turnover frequ ...

Figure 7.73 : Steep-cut fi lter circuits.   0.22μ 0.22μ 4 μ 7 6K8 3K3 10 K Ein Eout 0V f 1  30 Hz 20 dB/octave High-pass (a) ...

Preamplifi ers and Input Signals 239 It is, perhaps, signifi cant in this context that recent improvements in compact disc playe ...

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Interfacing and Processing Ben Duncan 8.1 The Input For the user, “ the input ” is often just a socket—often one groped for amid ...