Earthquake Sound SUB-80X Manual De Usuario

Subwoofer positioning is integral to the successful application of any surround 
sound system. It is very important to keep in mind that the proximity of the 
subwoofer to a wall or a corner contributes to an increase in efficiency (SPL) 
because of the "mirror effect" also referred to as "corner loading".

It is therefore advisable that you place the SUB-80X near a wall, or preferable in 
the corner of the room. That will increase the subwoofer effect by 2 to 3 decibels, 
without raising the volume control of the SUB-80X.

The fine tuning process includes creating a smooth transition of music between 
the subwoofer and the next speaker up: usually a woofer or a mid-range. As 
shown in the graph below; a smooth transition between lower and upper bass is 
directly relative to the crossover setting and the capability of the next woofer up 
to reproduce lower frequencies. Keep in mind that vocals extend down to 70Hz, 
adjust your SUB-80X accordingly.

Original Input Signal

Smooth Transition Between
Lower and Upper Bass

IDEAL
CROSSOVER SETTING

LOWER 

BASS

UPPER

BASS

Gapped Transition Between
Lower and Upper Bass

OVER GAPPED
CROSSOVER SETTING

LOWER 

BASS

UPPER

BASS

Uneven & Gapped Transition
Between Lower and Upper Bass

OVER GAPPED
CROSSOVER SETTING
LOWER BASS ENCROACHING 
ON UPPER BASS 

LOWER 

BASS

UPPER

BASS

CENTERED POSITION
(RECOMMENDED)

WIDE SCREEN /

FLAT PANEL

RIGHT 

FRONT

RIGHT

REAR

LEFT

REAR

LEFT 

FRONT

SUB-80X

VIEWING POSITION

CORNER LOADING
(HIGHLY RECOMMENDED)

WIDE SCREEN /

FLAT PANEL

RIGHT 

FRONT

RIGHT

REAR

LEFT

REAR

LEFT 

FRONT

SUB-80X

VIEWING POSITION

VENTILATION DUCT

SUB-80X

BASEMENT LOADING
(STEALTH APPLICATION)