After listing the 9 most elegant indoor gardening & planter concepts, we tried to hunt some of the coolest amplifiers for your iPhone and collected 11 such designs. Even while we were searching the web for passive amps, we wonder the amps are craze among iPhone users and coolest designs shows compatibility with iPhone only. Quite adorable, most of these amplifiers are passive and thus are ecofriendly. Even otherwise, who doesn’t want to save energy, especially, when go green is the trend. Following are the top 11 entries for the coolest iPhone amp collection.

1. Bike Horn iPhone from Lowtechatmo

This one is a green DIY project that used old bike horn with PVC. The weight of the horn keeps it steady and helps the music sound expand a bit for you.

2. Horn Bike iPhone Amplifier Case from Bone

Bone’s Bike iPhone case is perfect for those who love to ride their cycle. The case holds the iPhone with the help of a strap that ties to the handle bar and includes a horn shaped amp to expand and direct sound toward user’s ears. Cycling and this passive iPhone amplifier, which provides 30 decibels of amplification, make it great green thing to own.



3. iAcoustic Amplifier for your iPhone and iPod Touch

Made from real metal horn and wooden base, iAcoustic is one of the most stylish acoustic amps you’ll find for your Apple gadgetry. It doesn’t just look nostalgic and classic, but can also boost the sound upto 60 decibels.

4. Trumstand iPhone Dock from Japanese manufacturer Pleiades

Trumpstand is a bit costly as it’s an awesome shining passive amp plated with gold, brass or silver with an aluminum base. You can expect a quality bass boost from this fine elegant amplifier.

5. PH III Passive Amplifier

Handmade in Canada, this wonderful acoustic iPhone amplifier is all made from ceramic and weighs only 800 grams. An elegant boost of 60 decibels is quite acceptable, keeping in mind the aesthetics of the design.

6. Phonophone II iPod Speaker

Again a ceramic design that uses old school gramophone shape to amplify sound from you iPod, and not iPhone.

7. Ozaki iSuppli Gramo iPhone Charger / Speaker

We are not sure about the amplification mechanism, but it does work as a charger for your iPhone when it runs out of juice. Put the phone on the stand and enjoy some music or attend hands free calls while the batteries charge.

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8. ARKCANARY II Analog aAoustic Speaker for the iPhone 4 from HaA Design

ARKCANARY II is Kickstarter project, which seeks to provide ecofriendly as well as cost effective accessory for your iPhone. The long horn with a case at the base, in which you can slide your iphone, gives it cool effect.



9. The MegaPhone Acoustic iPhone Amp from Italian studio En & Is Design

MegaPhone does actually look like a mega thing. It might have gained inspiration from alphorn and Brancusi as the design strongly brings back memories of these epic shapes.

10.Steampunk Victrola iPhone Amplifier by Rockwel

Victrola is an upcycled piece of art and a natural amplifier that holds your iPhone 4 and gives a mild boost to the music. The trumpet is welded on the top of a spittoon and the phone can rest on the base. It’s vintage looks distinguishes it from ceramics and wooden amplifiers.



11. Acoustic iPhone Amplifier from Salvaged Phonograph Horns

This one might not have smoothness of ceramic, but incredible use of salvaged phonograph horn and a wooden base give it vintage style and as compared to others, it can amplify the sound up to 30 %. The sound effect is no match for digital speakers as it brings back old-fashioned quality.