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.
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