When buying a battery make sure they are rechargeable, have high mAh (energy capacity), and can output at least an amp at any time.

要买可充电的那种，有高mAh(能量的容量)，能在任何时候至少可以输出1安培。

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Is it possible to make MIDI controller for guitar amp?

有可能使吉他音箱MIDI控制器吗？

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According to the ETF Finder at ETF Channel, SYMC and AMP collectively make up 1.31% of the iShares Morningstar Mid Value Index Fund ETF (JKI) which is higher by about 1.7% on the day Monday.

FORBES: Connect

"These have been difficult decisions to make because of the impact on our people, " said AMP's chief executive Andrew Mohl.

BBC: Insurer to cut 1,900 jobs

Audyssey's amp is a music player for iPhone, iPad and iPod Touch that can make a subpar pair of headphones sound passable and a good pair sound stellar.

WSJ: Studio Sound to Go | App Happy