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 10X MJ15022 +10 X MJ15023 Audio Power Audio Power Amplifier AMPS Transistor TO-3 US $38.99 
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 5 X MJ15022 + 5 X MJ15023 Audio Power Audio Power Amplifier AMPS Transistor TO-3 US $22.99
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 TDA2051 40W Hi-Fi AUDIO POWER AMPLIFIER BY ST US $4.95
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 Audio Power Amplifier Dummy Test Load 8 OHM / 100 Watts US $9.99
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 TEA2025B STEREO AUDIO AMPLIFIER BY SGS LOT OF 25 US $18.95
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 5PCS, LM1875T LM1875 Audio Amplifier IC'S IC Chips US $8.60
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 TEA2025B STEREO AUDIO AMPLIFIER BY SGS LOT OF 100 US $89.00
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 MJL4302A Audio Power Amplifier transistor Hi-Fi PNP US $2.20
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 Class AB Audio HiFi Power Amplifier Trainer Build / learn /modify K48 US $19.90
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 MJ15004 PNP Audio Power Amplifier transistors TO3 x2 US $3.30
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 MJL3281A Audio Power Amplifier transistor 260V 15A x2 US $4.20
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 Power Amplifier KIT 56W rms Audio HiFi Amp Low THD K333 US $18.92
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 NPN Transistor For Audio Amplifier, 2SC5200 (lot of 6) US $10.00
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 1pair (MJ15003 NPN + MJ15004 PNP) Audio Power Amplifier transistors TO-3 New US $2.99
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 10pairs (MJ15003 NPN + MJ15004 PNP) Audio Power Amplifier transistors TO-3 New US $32.99
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 4PCS,Original 2SJ201 & 2SK1530 Audio Amplifier MOS-FET US $34.99
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 10PCS,Original 2SJ201 & 2SK1530 Audio Amplifier MOS-FET US $79.99
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 2 X 15Watt Class D Audio Amplifier Board - TA2024 US $18.90
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 1pair (MJ15022 NPN + MJ15023 PNP) Audio Power Amplifier transistors TO-3 New US $3.89
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 20PCS,Original 2SJ201 & 2SK1530 Audio Amplifier MOS-FET US $158.00
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 10pairs (MJ15022 NPN + MJ15023 PNP) Audio Power Amplifier transistors TO-3 New US $38.99
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 2 Pcs 15A 60V NPN Audio Power Amplifier Transistor US $4.41
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 1pair (MJ15024 NPN + MJ15025 PNP) Audio Power Amplifier transistors TO-3 New US $3.29
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 10pairs (MJ15024 NPN + MJ15025 PNP) Audio Power Amplifier transistors TO-3 New US $36.99
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 20 LM4562MA LM4562NA Dual HiFi Audio Amplifier IC'S US $68.90
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 Dual Hi-Fi Audio Operational Amplifier LME49720NA/NOPB US $3.71
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 200X Toshiba TA7222AP Audio Power Amplifier Output IC US $363.99
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 200x M5218P M5218 MITSUBIS Stereo Audio Amplifiers IC's US $189.00
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 5P TDA7293 TDA 7293 Audio Amplifier IC With Mute ST NEW US $19.95
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 5P STA575 2 x 100W BASH Audio Power Amplifier ST Brand US $34.88
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 20PCS TDA7376B TDA7376 POWER AUDIO AMPLIFIER IC IC'S US $84.45
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 20pcs TDA7294 DMOS Audio Amplifier New Geniune ST ICs US $45.88
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 2 Channel 25Watt Class D Audio Amplifier Board - TDA7492 US $17.50
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 4PCS MJ15025 Audio Power Amplifier transistors TO3 US $11.50
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 4pcs MJ15004 PNP Audio Power Amplifier transistors TO3 US $10.80
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 4PCS MJ15003 NPN Audio Power Amplifier transistors TO3 US $10.88
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 4pcs LM391N-100 Power Audio Amplifier IC Driver IC'S US $21.90
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 5PCS MJ15025 Audio Power Amplifier transistors TO3 US $11.95
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 5PCS MJ15024 NPN Audio Power Amplifier transistors TO3 US $11.95
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 200X M5218A M5218 MITSUBIS Stereo Audio Amplifiers IC's US $194.50
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 5PCS OPA604AP OPA604 ORIGINAL BB Audio Amplifier IC's US $19.70
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 20PCS OPA604AP OPA604 ORIGINAL BB Audio Amplifier IC's US $19.97
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 5PCS JRC386BD JRC386 386BD AUDIO POWER AMPLIFIER NEW US $5.98
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 50pc M5218P M5218 MITSUBIS Stereo Audio Amplifiers IC's US $53.48
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 50pc M5218A M5218 MITSUBIS Stereo Audio Amplifiers IC's US $53.58
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 50 x HT8950 IC'S Voice Modulator IC for Audio Amplifier US $68.55
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 4P Toshiba TA7222AP Audio Power Amplifier Output IC US $8.11
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 20PCS MJ15025 Audio Power Amplifier transistors TO3 US $39.80
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 20PCS MJ15003 NPN Audio Power Amplifier transistors TO3 US $32.88
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 2pcs, LM391N-100 Power Audio Amplifier IC Driver IC'S US $11.68
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 20 pcs DIP IC LM380N 380N 2.5W Audio Power Amplifier US $31.50
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 20pcs LM391N-100 Power Audio Amplifier IC Driver IC'S US $64.99
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 200P MJ15003 NPN Audio Power Amplifier transistors TO3 US $241.50
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 20PCS JRC386BD JRC386 386BD AUDIO POWER AMPLIFIER NEW US $18.88
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 50X Toshiba TA7222AP Audio Power Amplifier Output IC US $105.29
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 2 pcs TDA7294 DMOS Audio Amplifier Original from ST ICs US $7.50
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 Toroid 500VA Transformer ZM500 60/50Hz PRI: 0V-0V-115v Toroidal Audio Amplifier US $36.95
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 50 LM4562MA LM4562NA Dual HiFi Audio Amplifier IC'S US $138.00
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 2P x HT8950 IC'S Voice Modulator IC for Audio Amplifier US $6.88
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 10 pcs Power IC LM383T LM383 7W Audio Power Amplifier US $41.30
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 2P Toshiba TA7222AP Audio Power Amplifier Output IC US $6.93
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 2P TDA7376B TDA7376 POWER AUDIO AMPLIFIER IC IC'S US $12.88
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 2p TDA7293 TDA 7293 Audio Amplifier IC With Mute ST NEW US $12.98
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 2P STA575 2 x 100W BASH Audio Power Amplifier ST Brand US $15.98
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 50PCS TDA7376B TDA7376 POWER AUDIO AMPLIFIER IC IC'S US $203.85
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 50pcs TDA7294 DMOS Audio Amplifier New Geniune ST ICs US $114.99
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 2PCS OPA604AP OPA604 ORIGINAL BB Audio Amplifier IC's US $9.48
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 200 HT8950 IC'S Voice Modulator IC for Audio Amplifier US $328.00
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 5 x HT8950 IC'S Voice Modulator IC for Audio Amplifier US $11.88
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 20pc M5218P M5218 MITSUBIS Stereo Audio Amplifiers IC's US $30.99
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 5PCS,TDA7376B TDA7376 POWER AUDIO AMPLIFIER IC IC'S US $28.88
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 20pc M5218A M5218 MITSUBIS Stereo Audio Amplifiers IC's US $31.99
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 50PCS OPA604AP OPA604 ORIGINAL BB Audio Amplifier IC's US $126.85
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 2PCS MJ15025 Audio Power Amplifier transistors TO3 US $6.70
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 2PCS MJ15024 NPN Audio Power Amplifier transistors TO3 US $6.30
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 2PCS MJ15003 NPN Audio Power Amplifier transistors TO3 US $6.88
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 3P TDA7293 TDA 7293 Audio Amplifier IC With Mute ST NEW US $16.90
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 30X Toshiba TA7222AP Audio Power Amplifier Output IC US $67.99
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 5pc M5218P M5218 MITSUBIS Stereo Audio Amplifiers IC's US $7.99
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 5pc M5218A M5218 MITSUBIS Stereo Audio Amplifiers IC's US $9.27
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 50PCS MJ15025 Audio Power Amplifier transistors TO3 US $91.95
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 50PCS MJ15024 NPN Audio Power Amplifier transistors TO3 US $88.80
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 50PCS MJ15003 NPN Audio Power Amplifier transistors TO3 US $72.80
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Audio Amplifier
Picking The Best Audio Amplifier For Your Speakers
Audio amplifiers are available in a flood of different technologies and types. Picking the perfect model for a specific application would seem to be a daunting undertaking. I will describe some basic amplifier terminology and help you pick the perfect model regardless of what your particular application may be.
Audio amplifiers are the crucial connection between your source such as a DVD or Blu-Ray player and your speakers. An amplifier will convert the relatively weak source audio into a signal powerful sufficient to drive your speakers.
Even though some audio sources have already a built-in amplifier, a separate amplifier offers you more flexibility for picking the model that best complements your speakers. Some of today's miniature amplifier models can be hidden almost anywhere due to their small size.
Output wattage is one of the elements that most people will take into account first when selecting an amplifier as driving low-sensitivity speakers or driving speakers in large rooms or outdoors requires relatively high wattage. You shouldn't use an amplifier with significantly higher output power than your speakers can handle. Overdriving your speakers can do irreparable harm to your speakers.
However don’t be overly concerned about wattage. An amp supplying 20 to 50 Watts will give you more than plenty of power to sufficiently drive a speaker in any but the largest room.
There are two conventions for specifying amplifier wattage. The first one specifies how much power the amplifier is able to deliver constantly. That figure is often labeled rms or continuous power. The second number is known as peak or maximum power and tells how much the amp can deliver for small bursts. Normally you ought to select an amplifier based on rms power. However, make certain that the amplifier has adequate headroom or peak power to avoid clipping of music signals.
However, audio quality is just as important as having adequate audio power. Consequently be sure to also look at factors related to the quality of the amplifier. One of these parameters is referred to as total harmonic distortion or THD. No amplifier is completely ideal and the amplified signal will contain some error components which will distort the signal to some level. THD is either expressed in percent or dB. A smaller distortion number means a lower distortion of the audio signal by the amplifier. The level of distortion will be less than 0.05% for a high-quality amplifier. Consumer type amplifiers have higher distortion figures. Typical figures are up to 10% depending on the output power.
Another figure related to audio quality is known as signal-to-noise ratio and describes the amount of unwanted noise the amplifier will add to the signal. Higher-end amplifiers will achieve a signal-to-noise ratio of at least 100 dB while consumer grade amplifiers will usually have a signal ratio of at least 80 dB.
The bulk of today’s amplifiers are based on a technology called Class-D which provides higher energy efficiency than amplifiers based an Class-A or Class-AB technologies. High efficiency means that little power is wasted as heat which can make the amplifier rather small. High power efficiency has led to the development of very small amplifiers. Some of these latest mini amplifiers are no bigger than a deck of cards. However, when selecting a Class-D (digital) amplifier, be certain that the amplifier has little distortion and a high signal-to-noise ratio.
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