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Earthquake CP-8 — Review & Specs | Pricepect | Pricepect

Home Home Theater SubwoofersEarthquake CP-8

Earthquake CP-8 — image 1

Earthquake

Earthquake CP-8

Expert Review Analysis

The Earthquake Sound Couch Potato CP8 is a slim, 7‑inch high, powered 8‑inch down‑firing subwoofer delivering 150 W RMS (300 W peak) output for tight spaces, with a built‑in Class AB amp, auto on/off sensing, and versatile placement options.

✓ Best for: Small apartments, home offices, or furniture‑constrained rooms where a discreet, powerful subwoofer is needed; ideal for near‑field listening, movie nights, gaming sessions, and music playback in modest‑size spaces.✗ Not ideal for: Large open rooms or dedicated home‑theater setups that require very high SPL or deep sub‑30 Hz performance; users without wall gain or who need a standalone low‑frequency solution may find it lacking.

Pros

✓Exceptional output for its compact size, delivering seat‑shaking bass down to 20 Hz at high SPL levels.
✓Versatile placement under sofas, beds, or sideways, allowing discreet integration into small rooms.
✓Value‑driven performance with a 300 W peak Class AB amplifier at a modest price point.

Price History

Current

$259.00

Average

$267.05

Lowest

$215.95

Highest

$355.00

Good Deal — 3% below average

Best Seller Rank History

Now#129Best#32Worst#377 -8

Lower = better sales rank

Specifications

Audio

Driver Diameter8 in (203.2 mm) mm

Voice Coil Diameter2 in (50.8 mm) mm

Surround MaterialSantoprene

Frequency Response20 Hz – 180 Hz

Crossover Frequency Range40 Hz – 120 Hz

Controls

Gain ControlAdjustable

Phase Switch Range0° – 180°

Auto On/OffEnabled

Design

Height177.8 mm mm

Width601 mm mm

Depth304.8 mm mm

Weight11,158 g g

Enclosure TypeDown-firing bass reflex

General

BrandEarthquake

ManufacturerEARTHQUAKE

ModelCP8

ColorBlack Laminate

Release Date2011-10-17

Performance

Maximum SPL108.7 dB dB

SPL at 20 Hz102 dB dB

SPL at 21.7 Hz75 dB dB

Ports

RCA Low-Level InputStereo RCA

RCA Low-Level OutputStereo RCA

High-Level InputSpeaker level

High-Level OutputSpeaker level

Power

Continuous Power150 W W

Peak Power300 W W

Amplifier ClassClass AB

Electrical

THD0.001% @ 50 Hz

Input Impedance47 kΩ

Input Sensitivity50 mV–2.3 V

Acoustic

Free‑air Resonance (Fs)38 Hz

Qts0.516

Dimensions & Weight

Height7.0 Inches

Width12.0 Inches

Depth24.0 Inches

Weight24.6 pounds

Research Sources

thewireszone.com

soundapproach.com

audiosciencereview.com

earthquakesound.com

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User Reviews

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4.1

(96 reviews)

$259.00

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CP8Black Laminate 5 years limited warranty

Home Theater Subwoofers

✓Near‑field bass that physically shakes furniture, enhancing movie and gaming immersion.

✓Musical refinement that blends seamlessly into mixes with grounded rhythm sections.

Cons

✗Performance heavily depends on room or wall gain; without it the low‑frequency response drops to around 41 Hz.
✗Occasional port noise and resonances can introduce audible distortion around 30‑40 Hz.
✗Limited maximum output for very large rooms, making it unsuitable as a sole subwoofer in spacious spaces.
✗At high volumes the sub can become prominent in music, drawing attention rather than staying invisible.
✗Distortion tolerance is required when pushing the unit to its upper SPL limits.

From Expert Reviews

Praised by Experts

✓Professional tester praised its "very powerful output" for seat‑shaking bass in films like Apollo 13 and Interstellar.
✓Impressive near‑field bass that blends into mixes with "grounded and realistic" rhythm sections.
✓Measurements show a flat response to 21.7 Hz at 75 dB and compliance with CTA‑2010A down to 20 Hz.

Criticized by Experts

✗Performance is heavily dependent on room/wall gain; without gain the low‑frequency cutoff rises to about 41 Hz.
✗Port noise and resonances cause audible distortion around 30‑40 Hz, though somewhat forgiving to the ear.
✗Limited low‑end extension in large open spaces, making it less suitable as a standalone sub for big rooms.

From User Reviews

Users Love

✓Deep extension to 20 Hz at moderate volumes, providing satisfying sub‑bass for music and movies.
✓Easy concealment under furniture thanks to its slim 7‑inch height and black laminate finish.
✓Dynamic immersion that transforms setups, delivering strong mid‑bass and near‑field grunt.
✓Strong mid‑bass response that enhances rhythm sections without overwhelming the main speakers.

Users Complain About

✗Distortion tolerance needed at higher volumes; some users notice harshness around 30‑40 Hz.
✗Low‑end performance relies on room gain and proper placement; without it bass can feel thin.
✗Rattles and resonances appear during frequency sweeps, indicating port or enclosure vibration.
✗The bass can be overly prominent in certain music tracks, drawing attention away from the mix.

Expert Opinion

Professional reviewers highlight the CP8's impressive power and near‑field impact, noting its flat response to the low‑20 Hz region and its ability to shake seats in cinematic content. However, they caution that its performance hinges on room gain and that port noise can surface at the deepest frequencies, making it a strong but room‑dependent subwoofer.

What Users Say

Everyday users appreciate the CP8's deep bass extension, discreet form factor, and the immersive experience it adds to movies and music. Common praise centers on easy installation and powerful grunt, while recurring complaints focus on distortion around 30‑40 Hz, reliance on wall gain, and occasional rattling from the port.

Common Complaints

Distortion around 30‑40 Hz, audible port noise and resonances, heavy reliance on room/wall gain for low‑end extension, and occasional rattling during sweeps.

What People Are Saying

“very powerful output”
YouTube professional tester

“really impressive”
YouTube professional tester

“grounded and realistic”
YouTube professional tester

How It Compares

vs. SVS SB-1000 Pro

Advantages

✓Taller enclosure provides more consistent low‑frequency response without heavy reliance on room gain.

Disadvantages

✗Significantly taller (13.5 in) making it less discreet for furniture‑constrained spaces.

Choose the SVS SB‑1000 Pro for larger rooms where consistent deep bass is priority; choose the CP8 for tight spaces needing a slim profile.

vs. Hsu Research VTF-2 MK5

Advantages

✓Higher overall output and deeper bass extension suitable for larger home‑theater setups.

Disadvantages

✗Larger and less concealable than the CP8, requiring floor space.

Select the VTF‑2 MK5 when maximum SPL and deep bass are needed; the CP8 is better for discreet, near‑field applications.

vs. REL HT/1003

Advantages

✓Similar compact size and placement flexibility while offering refined musical integration.

Disadvantages

✗Lower peak power (150 W) and less low‑frequency reach compared to the CP8.

The REL HT/1003 suits audiophiles prioritizing musical nuance; the CP8 delivers higher power and deeper extension for movie‑centric setups.

Rating Trend

Rating4.1/ 5Reviews96+28 reviews -0.31