Welcome to our quiz featuring 10 questions about bass and subwoofers.

Is your knowledge of low-frequency facts and figures up to par?

Time to find out!

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1.) The wavelength of a 40 Hz sine wave is:
A. 18.3 ft (5.58 m)
B. 27.5 ft (8.38 m)
C. 40 ft (12.2 m)
D. 80 ft (24.4 m)

2.) A bass reflex loudspeaker is also known as:
A. An omni-bass
B. A contra-bass
C. A vented baffle
D. None of the above

3.) In addition to its inherent extended LF range, a ported (vented) enclosure’s frequency response:
A. Extends much higher into the HF range than other LF loudspeaker systems
B. Measures 6 dB SPL higher than similarly powered LF loudspeaker systems with identical cone drivers
C. Drops off rapidly 1/2 octave below its resonant frequency
D. All of the above

4.) A W-bin is a well-known type of:
A. Folded horn design
B. Sub-bass system produced by Martin Audio
C. LF loudspeaker design used only for permanent installations
D. Drum fill/subwoofer system first developed for drummer John Bonham (Led Zeppelin)

5.) High acoustical impedance is applied to an LF horn’s throat so that:
A. High frequency output is band-passed
B. Amplifier impedance is lessened
C. Less driver excursion is required to produce high SPL
D. None of the above

6.) Which of the following was a ported (vented) LF horn design?
A. Altec 816
B. JBL Berkins Bin
C. Community Leviathon
D. Cerwin-Vega TurfShaker

7.) As an LF loudspeaker’s frequencies rise, its cone’s directional pattern will:
A. Begin to cancel its own output
B. Narrow sharply
C. No longer be measurable
D. All of the above

8.) The unique design technology of Servodrive was:
A. A belt-driven transducer system
B. Coupling of exponential horns
C. Reciprocating hydraulically controlled transducers
D. None of the above

9.) Extended Low Frequency (ELF) technology was devised by:
A. Gene Czerwinksi
B. Al Berkins
C. Tom Danley
D. Ron Wickersham and Ed Long

10.) The first commercially available directional subwoofer was the:
A. Meyer Sound PSW-6
B. Electo-Voice Cardioid One
C. Servodrive BassTech-7
D. None of the above

Thanks for playing!