Chris Cid

CJ Monster Mouth

An iPhone stand & sound amplifier.

Front view of the handmade wooden iPhone stand and passive amplifier speaker “CJ Monster Mouth”

iPhone stand & speaker

CJ Monster Mouth is a handmade, wooden portable stand and sound amplifier.

Designed to improve the sound flow and direction, while improving the frequencies response.

Alternative front view of the handmade wooden iPhone stand and passive amplifier speaker “CJ Monster Mouth”

iPhone speaker suffers from harmonic distortions when the volume is high.

The main goal was to improve the sound quality, instead of only amplifying the volume. While creating a portable product that works as an iPhone stand.

Top view of the handmade wooden iPhone stand and passive amplifier speaker “CJ Monster Mouth”
Back side view of the handmade wooden iPhone stand and passive amplifier speaker “CJ Monster Mouth”
Back view of the handmade wooden iPhone stand and passive amplifier speaker “CJ Monster Mouth”
Alternative front view of the handmade wooden iPhone stand and passive amplifier speaker “CJ Monster Mouth” with an iPhone and charging cable attached

Designing the horn shape

To improve the sound quality, an exponential horn was necessary. Also, to create a portable stand, the horn has to have a rectangle shape.

Front view of the handmade wooden iPhone stand and passive amplifier speaker “CJ Monster Mouth” with an iPhone attached

Exponential horns are controlling efficient the mid and high range of frequencies. Amplifying these ranges without adding much sound color.

Rectangle horns are increasing the horizontal dispersion, causing to lobe distortion. To reduce the lobe distortion, the side “inner cheeks” added in the shape of the horn.

The inner cheeks are also helping to normalize the high & mid‐range frequencies.

Front view of the handmade wooden iPhone stand and passive amplifier speaker “CJ Monster Mouth” with an iPhone and charging cable attached

The particular horn shape —including the “teeth” shapes— results to a better balance on mid/high‐range of frequencies.

The limited bass of iPhone speaker, is slightly affected and normalized; Resulting to a better balance between low and mid/high‐range.

Side view of the handmade wooden iPhone stand and passive amplifier speaker “CJ Monster Mouth” with an iPhone attached

Material

The wood that I choosed was, zebrawood (Microberlinia brazzavillensis) for the top and bottom sections, and teak (Tectona grandis) for the middle section, including the “teeth”.

Side view of the handmade wooden iPhone stand and passive amplifier speaker “CJ Monster Mouth” with an iPhone and charging cable attached
Back view of the handmade wooden iPhone stand and passive amplifier speaker “CJ Monster Mouth” with an iPhone and charging cable attached

Cable management

On the back side, a hole is accommodating the Lightning charging cable.

Close up back view of the handmade wooden iPhone stand and passive amplifier speaker “CJ Monster Mouth” with an iPhone and charging cable attached
Close up top view of the handmade wooden iPhone stand and passive amplifier speaker “CJ Monster Mouth” with an iPhone and charging cable attached