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Plug your iPhone into this ceramic passive amplifier, optimized to boost The Megaphone comes in six colors, but if it's out of your price range. A passive amplifier for a stringed instrument (such as an electric guitar) comprises Klemarewski; Original Assignee: Andrzej Marek Klemarewski; Priority date. Note that yes, the megaphone device must vibrate for this to work, but instrument), not by direct contact between the speaker and the tube.
However, if the pickup 54 is too long, sound output is lowered. In one embodiment, the pickup 54 comprises an attachment point 57 that facilitates the securing of the attachment mechanism 56 to the pickup In the embodiment shown in FIG. Preferably, the pickup 54 is made from material with good acoustic properties. The pickup 54 not only transfers vibrations from the headstock 16, it also vibrates and these vibrations contribute to the volume and quality of the sound generated by the resonator Materials with good acoustic properties have a relatively high ratio of bending stiffness to density.
For example, wood has good acoustic properties and has traditionally been used for making stringed instruments. In addition to wood, other suitable materials for the pickup 54 include rigid plastics, glass fiber composites, graphite composites, and aluminum. It has been found that pickups 54 made from clear, straight grain wood of the following species performed well: The pickup 54 comprises first and second ends 60, 62, with an aperture 58 that extends between the first end 60 and the second end Preferably, the aperture 58 has a first diameter 64 proximate to the first end 60 and a second diameter 66 proximate to the second end 62, with the first diameter 64 being greater than the second diameter However, other dimensions are also possible.
In another embodiment, the pickup 54 may be solid throughout i. When the pickup 54 is attached to the headstock 16, the second end 62 contacts the headstock The attachment mechanism 56 provides constant pressure on the pickup 54, and as a result, the surface of the headstock 16 is subject to a generally perpendicular force gradient.
This perpendicular force gradient helps to ensure good physical contact between the second end 62 and the surface of the headstock Preferably, a portion of the pickup 54 is removed proximate to the second end 62 such that a resonating gap 68 is formed between the second end 62 and the headstock As best shown in FIGS.
The resonating gap 68 increases the level of sound amplification produced by the passive amplifier 50 and is defined, at least in part, by an upper edge 70, two opposed side edges 72, and the headstock Preferably, the resonating gap 68 extends approximately 0.
As a result of the resonating gap 68, two legs may be formed at the second end Proximate to the first end 60, the resonator 52 is attached.
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The resonator 52 may be in the form of a generally flared structure, such as the generally conic structure shown in FIGS. The resonator 52 may be attached to the pickup 54 by a number of fastening mechanisms, including bolts, screws, nails, staples, adhesives, etc.
The fastener opening 74 extends substantially perpendicularly to the aperture 58 and may extend through the entire width of the pickup The resonator 52 comprises a resonator opening 76, which is preferably located proximate to the apex of the resonator The resonator opening 76 is placed over the fastener opening 74 such that the resonator opening 76 and the fastener opening 74 are generally aligned.
A stiffener 78 may also be provided. The stiffener 78 comprises a stiffener opening 80, which is also aligned with the resonator opening 76 and the fastener opening An appropriate fastener 82 may be inserted through the stiffener opening 80, the resonator opening 76, and the fastener opening 74 to secure the stiffener 78 and the resonator 52 to the pickup A wingnut 84 may be threaded onto the end of the fastener 82 to secure the fastener 82 to the pickup The fastener 82 may be made from any suitable material, including metal or plastic.
Preferably, materials with low mass e. In an alternative embodiment shown in FIG. The resonating strip 86 lies between the resonator 52 and the pickup Preferably, the resonating strip 86 is between approximately 1. The resonating strip 86 is itself separated from the pickup 54 by one or more spacers The spacers are preferably between approximately 0. The resonating strip 86 may also have a strip opening to allow for the through passage of the fastener The resonating strip 86 is preferably made from wood e.
As discussed above, the resonator 52 may be in the form of a generally conic section. After the circular cutout 90 is cut radially along line A to form adjacent edges 92, 94, one edge 92 may be slid across the other edge 94 to form the generally conic section.
The shape of the conic section may be held in place using securing mechanism 96, such as adhesive tape or clips, to secure the resultant overlapping portions of the circular cutout 90 together.
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In an alternative embodiment shown in FIGS. For example, in FIGS. The use of substantially flat circular cutout 90 or substantially flat square cutout 98 for forming the resonator 52 is that they can be rolled into a tubular shape for shipping and storage. Although the cutouts shown in the Figures have a generally circular or generally rectangular shape, it is understood that other shapes for the cutouts are also possible.
Vibrations of the headstock 16 are transferred and conducted along the pickup 54 to the resonator The resonator 52 is preferably made from thin and relatively stiff material, such as paper, coated paper, plastic film such as polyester or polystyrene filmswood veneer, metallic foil, or other like material. The dimensions of the resonator 52 may vary.
Zooka A handy speaker that attaches to tablets, smartphones and laptops, the wireless Zooka speaker is a portable solution for those who want enhanced, high-quality sound on mobile devices. The speaker, made of durable silicone, can connect via Bluetooth within a feet range and also has an audio input.
The en&is Megaphone is the best looking passive speaker we've seen
Image courtesy of Carbon Audio. Carry your tunes with you even if you're going for a dive. The iSplash floating pool speakers can connect to a Bluetooth-enabled device up to 30 feet away. Image courtesy of iSplash. Plug your device in via a 3.How to connect a power amplifier to passive loudspeakers
The towel folds into a backpack for portability. Image courtesy of hi-Fun. Sony Sports Walkman This exercise music player is made to stay in place during extreme activity and can submerge under two meters of water.
Once you load it with your playlist, scan through the list on the player with easy-to-reach buttons. Check out our review to read more about the Sony Sports Walkman's underwater capabilities.
Image courtesy of Sony.
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The rugged case protects your iPhone from dirt and water, and the audio jack and charging ports both seal for complete protection when not in use. Image courtesy of The Joy Factory.
Crosley Cruiser Turntable If you prefer vinyl, the Crosley Cruiser is a compact, lightweight turntable that gets the job done. With built-in stereo speakers, the portable turntable is great for picnics and backyard parties.