The Martin Audio CDD8 is rated 3.2/5 for sound quality, #33 of 47 8-Inch PA Speakers. See all PA & Live Sound rankings for every top pick.

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Brand: Martin Audio
#33 Martin Audio CDD8: $960 Passive eBay
Same family: the Martin Audio CDD-LIVE 8 (smallest powered model, ranked higher, estimated 3.4/5), the Martin Audio CDD-LIVE 12 (powered model, estimated 3.1/5), the Martin Audio CDD-LIVE 15 (largest powered model, estimated 3.5/5), the Martin Audio CDD5 (smaller passive model, estimated 3/5), the Martin Audio CDD6 (smaller passive model, estimated 3.1/5), the Martin Audio CDD10 (larger passive model, rated 3.1/5), the Martin Audio CDD12 (larger passive model, rated 2.9/5) and the Martin Audio CDD15 (larger passive model, rated 3.3/5).
Pros: An ultra compact passive 8 inch coaxial speaker for on wall installations with consistent coverage. Medium-quality vendor data shows a 4.1 ideal-subwoofer preference score. The coaxial Differential Dispersion driver gives point-source summation of the LF and HF sections for consistent coverage, and the ultra-compact enclosure mounts horizontally or vertically for on-wall installation use. Measured bass extension of 128Hz (-3dB).
Cons: Being passive, it needs an external amplifier and crossover, and its compact on-wall design targets installed foreground music over full PA main duty.
Is the Martin Audio CDD8 right for you?
Skip it if
- you want neutral sound: its measured preference score is 4.1 even with a subwoofer.
- you will not add a subwoofer: bass rolls off below about 128 Hz.
- you want the best value: the higher-rated QSC K8.2 costs about $210 less.
| Released | Jun 2015 (11 years ago) |
|---|---|
| AES Input | No |
| Amplifier Power | Passive speaker; use external amplification within the 200W AES / 800W peak handling rating |
| Aux Input | No |
| Bass Extension (-3dB) | 128Hz (measured, vendor Spinorama data) |
| Bluetooth | No |
| Cabinet Material | Composite material |
| Coaxial Input | No |
| Configuration | Passive 2-way coaxial PA speaker |
| Coverage | 80-110° horizontal (user-rotatable), 60° vertical |
| Crossover Frequency | 2.3kHz passive |
| DSP | No (passive; used with a DX-series controller or MA Series amplifier for EQ and limiter presets) |
| Dimensions | 16.1”H x 10.1”W x 9.9”D (410 x 256 x 252 mm) |
| Drivers | 8” coaxial woofer, 1” exit compression driver |
| Frequency Response | 70Hz - 20kHz (±3dB, manufacturer specified); 55Hz (-10dB) |
| Guitar Input | No |
| HDMI Input | No |
| Inputs | Low-profile 13A push-lock input and link |
| Maximum SPL | 123dB peak / 117dB continuous |
| Microphone Input | No |
| Optical Input | No |
| Passive | Yes |
| Power Handling | 200W AES / 800W peak (manufacturer specified) |
| RCA Input | No |
| Rigging | Six M6 inserts for wall/ceiling brackets |
| Spinorama Preference Score | 1.11 |
| Spinorama Preference Score with Perfect Sub | 4.14 |
| TRS Input | No |
| USB Input | No |
| Weight | 20.9 lbs (9.5 kg) |
| XLR Input | No |
- Links
- Reviews, Comparisons and Sound Samples
Frequency Response
How the Martin Audio CDD8 measures across the audible range. A flatter listening window (the sound arriving straight at you) is more neutral: peaks sound forward or harsh, dips sound recessed. The estimated in-room response adds what a typical room does, and there a gentle, even tilt down toward the treble is ideal. Both curves are shifted so their 300 Hz to 3 kHz average sits at 0 dB.
Measurement data: spinorama.org, measured by the manufacturer.
EQ for a Neutral Response
Flattens the measured listening window from the Martin Audio CDD8's own bass extension up to 16 kHz. Set a preamp of -3.2 dB, then add these filters to any parametric equalizer in the signal path: the speaker's app or DSP if it has parametric EQ, a miniDSP, Equalizer APO or Wavelet. Boosts are kept to 3 dB, and EQ cannot fix how evenly the speaker spreads sound off-axis, which is why some speakers gain more than others. Predicted preference score with this EQ: 1.4, up from 1.1 (4.5 with an ideal subwoofer, up from 4.1). Calculated by Speaker Ranking from the spinorama measurements above.
| Filter | Frequency | Gain | Q |
|---|---|---|---|
| High shelf | 8,000 Hz | +1.3 dB | 0.70 |
| Peak | 535 Hz | -1.1 dB | 1.57 |
| Peak | 874 Hz | -2.6 dB | 4.00 |
| Peak | 1,504 Hz | +3.0 dB | 3.40 |
| Peak | 2,690 Hz | +1.6 dB | 4.00 |
| Peak | 5,080 Hz | -1.4 dB | 4.00 |
| Peak | 6,735 Hz | +1.3 dB | 0.50 |
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