EarthQuake CP-8 User Manual
Sound That Will Move You
CouchPotato
300 Watt
Digital
Powered
Subwoofer
User's Manual
Dear Valued Customer,
CP-8 Installation Manual
On behalf of everyone here at Earthquake Sound Corporation,
thank you for choosing the Couch Potato (model no. CP-8) by
Earthquake.
The CP-8 is a self-powered subwoofer that allows the user to
deliver massive fast bass into their seating position. By placing
the subwoofer close to you, the bass is faster, more powerful
and it also carries massive sub harmonic vibrations with it.
With an integral high-power 300 Watts MAX amplifier, the CP-8
subwoofer provides for an RCA input, high level input with a
crossed high level output. CP-8 high output level is designed to
Let’s get familiar with Your Couch Potato (CP-8)
POWER SWITCH (Off/AUTO/On) - Complete with light
indicator. When switched to “AUTO” mode, the CP-8 will
turn off after 15 minutes if no audio signal is detected.
PHASE SHIFT - 0 to 180° subwoofer phase shift switch.
VOLUME CONTROL - Manual adjustment of the
subwoofer’s sound level. Always start at MIN position
and slowly increase the volume to reach the desired
subwoofer sound level.
match typical satellite speaker systems to enhance the over all
sound quality and performance of your system.
The slim enclosure design allows the user to place the CP-8
under the sofa, behind it or under the bed. Now you can have
massive bass while using unused space.
Enjoy.
+
VOLUME
PHASE
O
O
0
180
+
+
AUTO
OFF ON
+
POWER
+
+
CROSSOVER
80Hz
120Hz
+
RIGHT
+
LEFT
XOVER FILTER - This 12dB/Oct variable crossover filter
is designed to control the subwoofer’s cut off frequency
(range: 40Hz to 130Hz).
LINE OUT RCA - High pass filtered RCA output jacks with
left and right line output signals. The line out RCAs are
not functional when the line in signal is derived from a
sub-filtered output of an external processor.
LINE IN RCA - Input jacks to accept up to 2.3 Volts of audio
input signal (mono and stereo).
HIGH LEVEL OUTPUT - High pass filtered output
terminals designed to power up stereo satellite
speakers.
MAIN POWER FUSE - Always replace protection fuse
with one with similar value. An extra fuse is provided for
your convenience.
I
POWER INPUT SELECTOR - The CP-8 operates in 115V
or 230V environment. Simply slide the selector to the
required power input setting.
HIGH LEVEL INPUT - Clamp style input terminal accepts
high level audio input from main or front system
speakers (up to 10 Volts).
HIGH LEVEL OUTPUT
+
+
+
DIGITAL
P O W E R
P O W E R E D S U B W O O F E R
+
+
FUSE
+
FUSE: 115V, T2A/250V
FUSE: 230V, T1A/250V
+
HIGH LEVEL INPUT
+ +
LEFT RIGHT
+
+
Couch Potato
1 5 0 W A T T S
+
+
+
+
+
I
Key Connection and Controls
Figure 1.
+
+
+
+
+
+
+
www.earthquakesound.com 2
CP-8 Installation Manual
Operating & Controlling Your CP-8
Before you make any connections to power up your Couch Potato, please
double check the following:
1. The input power switch 110 AC or 220 AC based on your local
power.
2. Please make sure that the gain/volume knob is set to minimum.
3. Make sure that the power switch is set to OFF.
4. The crossover should be set to 10 o’clock position.
Connecting Your CP-8
LOW LEVEL INPUT CONNECTION
1. Locate the LINE IN RCA on the CP-8 amplifier (Fig. 1F)
2. Connect the CP-8 to the signal source, i.e. AV receiver. There is no
need to have both RCAs to the signal source since the subwoofer is
often operated in mono signal. If the receiver does not have
adequate signal level, then you may want to use both RCA inputs in
order to obtain higher signal level.
3. If needed, connect the LINE OUT RCA (Fig. 1E) to another amplifier
to drive satellite speakers (front or rear). The LINE OUT RCA has
high pass filtered signal at about 70Hz (5dB/Octave cut off).
HIGH LEVEL INPUT CONNECTION
The CP-8 has a HIGH LEVEL INPUT connection (Fig. 1J). For the best
performance, you might consider RCA connection if it is available on your
source. If not, then high level input will do.
1. Since bass is mono, you can connect the high level input of any of the
front speakers to your CP-8. For ease of wiring, pick the speaker that
is closest to the subwoofer. Simply piggy back a wire from the
speaker to the subwoofer and you’re up and running.
Note: The high level input 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 (Fig. 1J). These
terminals are marked with red and black to indicate the (+) & (-)
respectively.
2. Adjust the subwoofer low pass filter cut off to near 100Hz at first,
slowly bring down the crossing point until you eliminate any
emanating vocals from the subwoofer. An ideal crossing pint range
from 55 to 70Hz.
3. In case the CP-8 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).
(!) NOTE: DO NOT USE HIGH LEVEL AND RCA INPUTS AT THE SAME
TIME.
Cautions
Features & Specifications:
AMPLIFIER
- Power Output: 300 Watts
- Frequency Response: 20Hz - 180Hz
- Crossover Frequency: 40Hz - 130Hz
- Crossover Slope: 12dB per Octave
- THD: 0.001% @ 50 Hz.
- Input Impedance: 47,000 ohms
- Input Sensitivity: 50mV to 2.3V
- Power Supply: 115V/230V (50Hz~60Hz)
- Fuse Rating: 1 Amp
SUBWOOFER
- 300 watts 8" subwoofer
- 2" high temperature voice coil
- Durable pressed paper cone
- Long Excursion santoprene surround
- 48oz high density magnet
- 89dB 1W/1M
- FS: 38Hz
- Qts: 0.516
SYSTEM
- Dimensions (H - feet included x W x D):
7” (177.8mm) x 12” (304.8mm) x 24” (601mm)
- Weight: 24.58 lbs / 11.15 kgs
(!) 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.
For more technical support, please contact us by:
Phone: 1-800-576-7944
Email: tech@earthquakesound.com
www.earthquakesound.com 3
Loading...