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Bottom bass reflex acoustic systems

 prices on 16 models  

 

— acoustic systems in which there is a phase inverter (FI; see "Acoustic design"), displayed on the underside of the speaker cabinet. It can be either the only FI or an addition to the front or rear air duct (see the relevant paragraphs).

For normal operation of the phase inverter, it is necessary that there is a certain free space in front of the duct outlet; it cannot be placed close to obstacles. Therefore, this variant is found in two specific varieties of AS. The first are floor and shelf models with specially designed stands that provide an optimal distance from the bass reflex output to the solid base of the stand (or to the surface on which the speaker is installed). The second is wall-mounted (suspended) models, designed for a large amount of free space under the speaker. But from an acoustic point of view, it cannot be unequivocally said that this option is better or worse than others — a lot depends on other design features, as well as on the personal preferences of listeners.

As for the combination with other types of FI, in such cases the lower air duct performs mainly an auxiliary function, further improving the sound quality at low frequencies.
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Speakers Polk Audio S55
Polk Audio S55
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Suitable for:homemade, floor
Type of acoustics:2.0 system, passive
Impedance:8 Ohm
Frequency range:32 – 40000 Hz
Colour:
Price from $315.00
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3 store 8 offers
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Speakers Polk Audio Reserve R700
Polk Audio Reserve R700
Suitable for:homemade, floor
Type of acoustics:2.0 system, passive
Impedance:4 Ohm
Frequency range:38 – 38000 Hz
Price from $1,099.00
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1 store 1 offer
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Speakers Polk Audio S60
Polk Audio S60
Suitable for:homemade, floor
Type of acoustics:2.0 system, passive
Impedance:8 Ohm
Frequency range:26 – 40000 Hz
Colour:
Price from $385.00
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1 store 5 offers
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Speakers Polk Audio S50
Polk Audio S50
Suitable for:homemade, floor
Type of acoustics:2.0 system, passive
Impedance:8 Ohm
Frequency range:33 – 40000 Hz
Colour:
Price from $245.00 up to $698.00 
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1 store 7 offers
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Speakers Adam A7V
Adam A7V
Suitable for:monitor, shelf
Type of acoustics:1.0, active
Frequency range:40 – 45000 Hz
Rated power:130 W
Price from $799.99
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3 store 3 offers
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Speakers Adam A4V
Adam A4V
Suitable for:monitor, shelf
Type of acoustics:1.0, active
Frequency range:52 – 45000 Hz
Rated power:130 W
Price from $499.99
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3 store 3 offers
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Speakers Adam A77H
Adam A77H
Suitable for:monitor, shelf
Type of acoustics:1.0, active
Frequency range:34 – 45000 Hz
Rated power:340 W
Price from $1,299.99
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2 store 2 offers
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Speakers Adam A8H
Adam A8H
Suitable for:monitor, shelf
Type of acoustics:1.0, active
Frequency range:31 – 45000 Hz
Rated power:340 W
Price from $1,499.99
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2 store 4 offers
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Speakers Polk Audio L800
Polk Audio L800
Suitable for:homemade, floor
Type of acoustics:2.0 system, passive
Impedance:3 Ohm
Frequency range:32 – 38000 Hz
Rated power:200 W
Colour:
Price from $2,999.00 up to $4,348.00 
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2 store 4 offers
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Speakers Martin Logan ElectroMotion ESL X
Martin Logan ElectroMotion ESL X
Suitable for:homemade, floor
Type of acoustics:2.0 system, passive
Impedance:8 Ohm
Frequency range:41 – 22000 Hz
Price from $2,246.11 up to $2,499.00 
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2 store 3 offers
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Speakers Martin Logan Electromotion ESL
Martin Logan Electromotion ESL
Suitable for:homemade, floor
Type of acoustics:2.0 system, passive
Impedance:8 Ohm
Frequency range:42 – 22000 Hz
Price from $1,399.98 up to $2,899.00 
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2 store 4 offers
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Speakers Polk Audio Reserve R600
Polk Audio Reserve R600
Suitable for:homemade, floor
Type of acoustics:2.0 system, passive
Impedance:4 Ohm
Frequency range:43 – 38000 Hz
Price from $849.00
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1 store 1 offer
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Speakers Wharfedale Diamond 225
Wharfedale Diamond 225
Suitable for:homemade, shelf
Type of acoustics:2.0 system, passive
Impedance:8 Ohm
Frequency range:45 – 20000 Hz
Colour:
Price from $349.00
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1 store 2 offers
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Speakers Wharfedale Diamond 220
Wharfedale Diamond 220
Suitable for:homemade, shelf
Type of acoustics:2.0 system, passive
Impedance:8 Ohm
Frequency range:56 – 20000 Hz
Colour:
Price from $259.00
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1 store 2 offers
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Speakers Polk Audio LSiM 707
Polk Audio LSiM 707
Suitable for:homemade, floor
Type of acoustics:2.0 system, passive
Impedance:8 Ohm
Frequency range:20 – 40000 Hz
Price from $5,599.00
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Speakers Polk Audio LSiM 706c
Polk Audio LSiM 706c
Suitable for:homemade, shelf
Type of acoustics:1.0, passive
Impedance:8 Ohm
Frequency range:30 – 40000 Hz
Price from $2,049.99
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