Handbook for Sound Engineers

1292 Chapter 34 70 V transformer with a 0.5 dB loss. When this trans- former delivers 10 W to the loudspeaker, it draws 11.1 W f ...

Sound System Design 1293 will break after the repeated flexing of portable usage. Shields should be braided wire, not foil, for ...

1294 Chapter 34 34.5.1.4.8 Cable and Connectors for Microphones and Other Low-Level Devices Lo-Z balanced microphones use shield ...

Sound System Design 1295 The XLR-type connector is an industry standard for lo-Z balanced microphones. Unfortunately, in the pas ...

1296 Chapter 34 34.5.1.5 Cable and Connectors for Digital Audio Devices Cable and connectors for digital audio devices are deriv ...

Sound System Design 1297 the output impedance of the mixer/amplifier can be called the source impedance for the loudspeaker. The ...

1298 Chapter 34 load impedance required by a high-impedance micro- phone is many times higher than the load impedance required b ...

Sound System Design 1299 The first rule of level compatibility is to avoid connecting devices from different classifications unl ...

1300 Chapter 34 If the source device has a lower output level than the load device, a line-level preamplifier could be connected ...

Sound System Design 1301 which would still be within the safe limits for these power amplifiers. The easiest way to describe the ...

1302 Chapter 34 There are two primary reasons for careful grounding and shielding in an audio system. The first reason is safety ...

Sound System Design 1303 34.5.1.9.4 Older Two-Wire Audio Equipment Some newer equipment, especially consumer-type equipment, may ...

1304 Chapter 34 34.5.1.9.6 Grounding to Reduce External Noise Pickup After safety, the second reason to pay attention to groundi ...

Sound System Design 1305 there is only one audio cable connecting the two devices, a second ground connection, through the ac ca ...

1306 Chapter 34 Both transformer-coupled and active-balanced equipment can provide excellent hum and noise rejec- tion. As a gen ...

Sound System Design 1307 Keep the Cables Short. Rack mounting can help here, as can simple neatness. Keep Cables of the Same Typ ...

1308 Chapter 34 response. In entertainment sound reinforcement systems, equalization may also be used to enhance the sound quali ...

Sound System Design 1309 equalization process and mixer tone controls used to adjust for different microphone types (a more reas ...

1310 Chapter 34 trying to boost a diaphragmatic absorber (again, no more than about 3 dB at first) to help smooth system respons ...

Sound System Design 1311 box resonant frequency fb to help protect the loud- speaker from overexcursion. A 12 or 18 dB/octave lo ...