± 16V)

Figure 17 : P.C. Board and Component Layout for the Circuit of Figure 16 (1:1 scale)

MULTIWAY SPEAKER SYSTEMS AND ACTIVE

BOXES

Multiway loudspeaker systems provide the best

possible acoustic performance since each loud-

speaker is specially designed and optimized to

handle a limited range of frequencies. Commonly,

these loudspeaker systems divide the audio spec-

trum into two or three bands.

To maintain aflat frequencyresponse over the Hi-Fi

audio range the bands covered by each loud-

speaker must overlap slightly. Imbalance between

the loudspeakers produces unacceptable results

therefore it is important to ensure that each unit

generates the correct amount of acoustic energy

for its segmento of the audio spectrum. In this

respect it is also important to know the energy

distribution of the music spectrum to determine the

cutoff frequencies of the crossover filters (see Fig-

ure 18). As an example a 100W three-way system

with crossover frequencies of 400Hz and 3kHz

would require 50W for the woofer, 35W for the

midrange unit and 15W for the tweeter.

TDA2030A

8/15