Earthquake Sound SUB-80X User Manual

Sound That Will Move You

SUB-80X

150 Watt

Digital

Powered

Subwoofer

Sound That Will Move You

Earthquake Sound reserves the right to amend details of the specifications without notice.

Copyright © Earthquake Sound Corporation

Earthquake Sound Corporation • 2727 McCone Avenue Hayward CA, 94545

Phone: [phone] Fax: [phone]

User's Manual

Dear Valued Customer,

Congratulation on your choice of the SUB-80X self powered subwoofer system,
one of Earthquake's newest designs in bass reproduction units.

With an integral high-power amplifier - 150 Watts, the SUB-80X subwoofer
combines tight bass extension with high output levels. Acoustically, it is designed
to match typical satellite speaker systems to enhance the over all sound quality
and performance of your system.

Key Connection and Controls:

Key Connection and Controls:

A) LINE IN RCA - Input jacks, accept up to 1.4 volts of audio input signal (mono
and stereo).

B) LIN OUT RCA - High pass filtered RCA output jacks with left and right line
output signals. The line out RCA's are not functional when the line in signal
(going into the subwoofer) is derived from a sub-filtered output of an external
processor.

C) XOVER FILTER - The 12dB/Octave variable crossover filter is designed to
control the subwoofer cut off frequency (range from: 40Hz to 130Hz).

D) VOLUME CONTROL - Manual adjustment of the sound level of the
subwoofer. Always start at MIN position and slowly increase the volume to reach
the desired subwoofer level.

E) PHASE SHIFT - 0 to 180 degrees subwoofer phase shift switch.
F) POWER SWITCH - For operating the amplifier automatic or manual power on.

In automatic mode, the SUB-80X will turn OFF in 15 minutes if no audio signal is
detected.

G), H) POWER INPUT - The SUB-80X operates in 115V and 230V environments.
A sliding switch located near the power plug allows for both operations.

I) HIGH LEVEL OUTPUT - High pass filtered output terminals designed to power
up stereo satellite speakers.

VOLUME

PHASE

O

180

AUTO

HIGH LEVEL OUTPUT

POWER

O

0

OFF ON

DIGITAL

P O W E R

P O W E R E D S U B W O O F E R

CROSSOVER

80Hz

120Hz

HIGH LEVEL INPUT

LEFT RIGHT

RIGHT

LEFT

SUB-80X

1 5 0 W A T T S

J) HIGH LEVEL INPUT - Clamp style input terminal, accepts high level audio
input from the main or front system speakers (up to 10 volts).

FUSE: 115V, T2A/250V
FUSE: 230V, T1A/250V

I

Listening Room & Subwoofer Position: Positioning Examples

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.

Fine Tuning:

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

CORNER LOADING
(HIGHLY RECOMMENDED)

CENTERED POSITION
(RECOMMENDED)

SUB-80X

LEFT

FRONT

LEFT

REAR

LEFT

FRONT

WIDE SCREEN /

FLAT PANEL

VIEWING POSITION

SUB-80X

WIDE SCREEN /

FLAT PANEL

RIGHT

FRONT

RIGHT

REAR

RIGHT

FRONT

Gapped Transition Between
Lower and Upper Bass

Uneven & Gapped Transition
Between Lower and Upper Bass

OVER GAPPED
CROSSOVER SETTING

LOWER
BASS

UPPER
BASS

OVER GAPPED
CROSSOVER SETTING
LOWER BASS ENCROACHING
ON UPPER BASS

LOWER
BASS

UPPER
BASS

BASEMENT LOADING
(STEALTH APPLICATION)

LEFT

REAR

VIEWING POSITION

VENTILATION DUCT

SUB-80X

RIGHT

REAR

Operating & Controlling Your SUB-80X

* Secure all connection before powering up/plugging in the AC cord into the
subwoofer.

* Connect the input signal to either the RCA lin in (A) or the High Level input
terminal (F); these two input devices can not be used simultaneously, choose the
one that best matches the output of your existing audio system.

* If needed, connect the RCA line out (B) to another amplifier to drive satellite
speakers (front or rear). The RCA line out has high pass filtered signal at about
70Hz (5dB/Octave cut off).

* The High Level input (I) for satellite speakers is fitted with a High Pass filter
(70Hz). It is only powered when the main or front speaker signals are driven into
the High Level input (J). These terminals are marked with red and black to
indicate the (+) & (-) respectively.

Features & Specifications:
Amplifier

- Power Output: 150 Watts

- Frequency Response: 23Hz - 180Hz

- Crossover Frequency: 40Hz - 130Hz

- Crossover Slope: 12dB per Octave

- Typical THD: 0.09%

- Input Impedance: 47,000 ohms

- Input Sensitivity: 50mV to 2.3V

- Power Supply: 115V/230V (50Hz~60Hz)

- Fuse Rating: 1 amp

Subwoofer

- 200 watts 8" subwoofer

- 1.5" high temperature voice coil

- Durable pressed paper cone

- Long Excursion santoprene surround

- 48oz high density magnet

* Adjust the subwoofer low pass filter cut off to near 100Hz at first, slowly bring
down the crossing point until you eliminate any vocals from emanating from the
subwoofer. An ideal crossing pint range from 55 to 70Hz

* In case the SUB-80X becomes out of phase with the satellite speaker, flip the
phase switch to correct the problem (maximum bass is only achieved when the
sub is in phase with rest of your speakers).

Cautions:

* Do not place the subwoofer in an environment exposed to dust, excessive
moisture or heat. Direct exposure to sun light will over time deteriorate the
enclosure finish and may cause the amplifier to overheat.

* To prevent electrical shock, never open the subwoofer cabinet before
disconnecting the power cord from the amplifier's main socket.

* In the event of a blown fuse, replace it with a 1 ampere fuse only. Over fusing
voids the warranty and will destroy the amplifier.

- 89dB 1W/1M

- FS: 38Hz

- Qts: 0.516

System

- Dimensions HxWxD:
13-1/2" x 9-1/2" x 13-3/4"

- Weight: 18.7 lbs / 8.5Kg

For Technical Issues Please Contact Us VIA:
Phone: [phone]
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