Head First 2D Geometry

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triangle properties

Use what you know about your venue to quickly reduce your

speaker options to just two. (Cross out ones you’re rejecting.)

The ideal speakers are wider and longer

than the venue…but only by a little

There’s no point in paying extra so that people outside the

venue can hear the show, but you need to be sure that everybody

inside can hear.

Wasted.

People can’t hear.

People can’t hear.

Wasted.

People

can’t hear.

Too wide and short Too narrow and long Just wide and long enough

Spread Angle 60m 100m 200m

60º $1500

$2500 $3000 $4000

$2000 $3000

90º

174 Chapter 4

narrowing down your choices

Q:

Is this for real? Are speakers really sold by angles?

A: Yup. Common sizes are 60º, 90º, and 120º. Bass

speakers tend to be broad, and tweeters (for higher

frequencies) are narrower, but all vary. Apparently for

perfect sound quality you need to sit so that you and

your two stereo speakers (left and right) make a perfect

equilateral triangle. But that’s only for really hardcore

music geeks.

Q:

And don’t we need more than one speaker?

A: What you’re really ordering is a speaker system, which

would probably have more than one unit.

Spread Angle 60m 100m 200m

60º $1500

$2500 $3000 $4000

$2000 $3000

90º

The venue length is 75m.

Both these speakers are going to reach the back.

Use wh