CAT CAT Amplifiers and Loudspeakers

Question 1

What does the damping factor of a power amplifier measure?

Accepted Answer

The ratio of load impedance to amplifier output impedance

Answer

Damping factor is the ratio of the load impedance to the amplifier's output impedance and affects how well the amp controls loudspeaker cone movement.

Question 2

Which loudspeaker enclosure type uses a tuned port to extend low-frequency response?

Accepted Answer

Bass reflex (ported)

Answer

A bass reflex enclosure uses a tuned port or slot that resonates to reinforce bass frequencies and extend the low-frequency response.

Question 3

What is the purpose of a crossover network in a multi-way loudspeaker system?

Accepted Answer

To divide the audio spectrum and route each band to the appropriate driver

Answer

A crossover network splits the full-range audio signal into frequency bands so that each driver (woofer, mid, tweeter) only receives the range it is designed to reproduce.

Question 4

In a 70-volt distributed speaker system, what component is mounted at each speaker to match impedance?

Accepted Answer

A line-matching transformer

Answer

Each speaker in a 70V system has a small step-down transformer that converts the high-voltage line to a level the speaker voice coil can handle.

Question 5

A power amplifier is rated at 500 W into 8 Ω. What is the expected output voltage (RMS) at full rated power?

Accepted Answer

63 V

Answer

Using V = √(P × R) = √(500 × 8) = √4000 ≈ 63 V RMS.

(CAT) Commercial Audio Technician Practice Test

(CAT) Commercial Audio Technician Practice Test

CAT CAT Amplifiers and Loudspeakers