Question
A 3.1 sound system has _____.
This question was previously asked in
RRB ALP 2018 CBT 2 Fitter Question Paper (21-Jan-2019) (Shift 3)
The correct answer is
3 speakers and one subwoofer
Understanding 3.1 Sound System Components
The designation "3.1" in a sound system refers to its specific channel and speaker configuration.
- The integer part (3) represents the number of main audio channels/speakers. These typically handle the full range of sound frequencies.
- The fractional part (.1) represents a dedicated channel for low-frequency effects (LFE). This channel is handled by a subwoofer, which specializes in producing deep bass sounds.
Analyzing the 3.1 Configuration
Therefore, a 3.1 sound system is defined by its inclusion of three main speakers plus one dedicated subwoofer.
Based on this definition:
- Option 1 is incorrect because tweeters are components *within* speakers, not a separate main element defining the ".1".
- Option 2 is incorrect as it omits the dedicated LFE channel component.
- Option 3 is incorrect because bass and treble are audio characteristics or controls, not hardware components in this context.
- Option 4 correctly identifies the configuration: 3 speakers and one subwoofer.
The standard setup for a 3.1 system comprises three front speakers (left, center, right) and one subwoofer for low-frequency effects.
Was this answer helpful?
Similar Questions
- A tuning fork is struck harder. Which of the following increases as a result?
- During the propagation of sound in air, rarefaction is the region where:
- When a sound is produced, what travels through the medium?
- Megaphones, loudhailers, horns and musical instruments like trumpets and shehnais are designed to:
- In a mixer, which control determines the amount of signal to be sent to the right or left channels?
- What are the speakers that handle the higher range of audio frequencies called?
In a PA system, a _____ is used to adjust the amplitude of different frequencies to achieve the desired quality of sound output.
- What is the full form of DTS?
- A sound of single frequency is called a:
Important Questions from Sound
We hear an echo due to
- What is required for the generation of a sound wave?
An infrasound microphone enables the remote detection of aircraft wake vortices, clear air turbulence, tornadoes, and seismic events at frequencies below:
- If the temperature of air increases, what happens to the speed of sound and the minimum distance to hear an echo?
- Which of the following is an example of a longitudinal wave?
Need Expert Advice?
Upcoming Exams
RRB NTPC
September 27, 2026
Test Series
Railways
RRB ALP 2026 Mock Test series
1035 Tests 1 Tests Free
889 Attempts
4.3(235)
English, Hindi
More Questions from RRB ALP
