Amp Hifi
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1959 HI FI BOOK = PRACTICAL HI-FI HANDBOOK = GORDON J KING = SERVICE INFO AMPS $31.63 |
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TA2022 HI-FI Audio Power Amplifier 90W+90W Digital AMP $119.00 |
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4 FRANCE HIFI QUAD MINIWATT 12AT7WA 6201 12AT7 MATCHED QUAD Audio Amp Tube NOS $94.05 |
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2 RARE 1962 HIFI RCA 6679/12AT7 6201 BLACK PLATE MATCHED SET PAIR Amp Audio Tube $56.05 |
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Super Mini 500 Watt Desktop HiFi Stereo Amplifier Amp $12.59 |
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2 TIX Drake J. Cole & Waka Flocka Flame 5/20 Hifi Buys AMP Sect-207 $198.00 |
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MATCHING PAIR OF 6V6 OUTPUT TRANSFORMERS ~HI-FI/GUITAR AMP~ *HAMMOND ORGAN PULL* $18.50 |
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MATCHING PAIR OF 6V6 OUTPUT TRANSFORMERS ~HI-FI/GUITAR AMP~ *HAMMOND ORGAN PULL* $16.52 |
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2 TIX Drake J. Cole & Waka Flocka Flame 5/20 Hifi Buys AMP Sect-102 $337.00 |
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AMP Class A Hybrid Tube Headphone Amplifier Hi-Fi Hifi 6N11 Pro Audio Equipment $39.59 |
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New Pyle PVA2 60 Watts Hi-Fi Mini Stereo Amplifier Amp $64.24 |
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New Pyle PVA3U 60 Watts/ Hi-Fi Mini Amplifier USB SD Card Player Amp $91.74 |
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Vintage Audio Amp solid State ELECTRO-VOICE E-V 1122 HIGH END HI-FI PREAMPLIFIER $125.00 |
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BMW E90 E92 E60 E61 E63 M5 LOGIC 7 AMPLIFIER TOP HIFI SYSTEM BECKER AMP L7 OEM! $615.00 |
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PCB for Gainclone Audio Amplifier LM3875 Gold Plated HiFi Amp Qty:4 $18.70 |
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6 PCS TDA2030 TDA2030A IC Amp Audio 18W HI-FI Pentawatt $9.99 |
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old vintage 6L6GC Black Plate RCA Tube Pair TV7′d USA tubes 6L6 hi-fi guitar amp $32.00 |
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2 TIX Miranda Lambert 7/13 Hifi Buys AMP Sect-PIT $225.00 |
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New Altnux 500W 2Ch Mini HiFi Stereo Audio AMP Car Amplifier for Motorcycle Boat $36.59 |
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Mini USB Audio 2CH Stereo Little HIFI Digital Amplifier AMP AMPS MA-180 $9.92 |
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Power Amplifier KIT 56W rms Audio HiFi Amp Low THD K333 $19.00 |
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Mini Hi-Fi Audio Amplifier Amp for Mp3 iPod Home Music $12.59 |
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New HiFi Stereo Amplifier Car Music Power Audio 2CH Amp $12.99 |
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Banzai V2 CMOY Headphone Amplifier DIY Kit PCB Amp HiFi $17.00 |
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Tube 6N11 + LM3886 HIFI Audio Amplifier Home Audio AMP $135.00 |
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LM4780 Dual Audio Power Amplifier IC 2x60W Amp HiFi $9.90 |
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EMERSON 10LD6/LL802 NOS NIB MADE IN GERMANY hi-fi stereo tube ,tube amp part $5.37 |
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6N11 Hi-Fi Class A Hybrid Tube Headphone Amplifier AMP $53.95 |
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NEW 500 WATT MINI SIZE CAR MP3 HI-FI STEREO SPEAKER AMPLIFIER AMP $16.70 |
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USB Hi-Fi Audio Stereo Power Amp Amplifier For Car cz17 $12.77 |
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VINTAGE CHOKE 7H @60mA FROM WW2 FOR RADIO OR HIFI AMP USE $7.89 |
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Pro Hi-Fi Class A Tube Headphone Amplifier 6N11 AMP NEW $55.59 |
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w/ Tracking 6N11 Hi-Fi Class A Tube Stereo Headphone Amplifier Amp+Power G016 $53.99 |
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UK 10pc Silver film MICA Capacitor 1000pF 500V fr hifi audio amp guitar amp tone $9.49 |
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UK 10pc Silver film MICA Capacitor 150pF 500V fr hifi audio amps guitar amp tone $8.54 |
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UK 10pc Silver film MICA Capacitor 180pF 500V fr hifi audio amps guitar amp tone $8.54 |
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UK 10pc Silver film MICA Capacitor 33pF 500V for hifi audio amps guitar amp tone $8.54 |
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UK 10pc Silver film MICA Capacitor 390pF 500V fr hifi audio amps guitar amp tone $8.54 |
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UK 10pc Silver film MICA Capacitor 47pF 500V for hifi audio amps guitar amp tone $8.54 |
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UK 10pc Silver film MICA Capacitor 500pF 500V fr hifi audio amps guitar amp tone $8.54 |
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Portable HiFi Tube headphone amplifier amp battery T10 $118.95 |
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10pcs Silver film MICA Capacitor 180pF 500V for hifi audio amps guitar amp tone $5.99 |
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2 TIX Brad Paisley The Band Perry & Scotty McCreery 9/15 Hifi Buys AMP Sect-102 $315.00 |
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Mini Hi-Fi Stereo Audio Amplifier Amp Car Motorcycle $15.97 |
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2 TIX Toby Keith & Brantley Gilbert Sect PIT 8/24 Hifi Buys AMP $340.00 |
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2 TIX Toby Keith & Brantley Gilbert Sect PIT 8/24 Hifi Buys AMP $310.00 |
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2 TIX Toby Keith & Brantley Gilbert Sect PIT 8/24 Hifi Buys AMP $370.00 |
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2 TIX Jason Aldean & Luke Bryan 5/18 Hifi Buys AMP 206 $203.00 |
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2 TIX Jason Aldean & Luke Bryan 5/18 Hifi Buys AMP 206 $225.00 |
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Hi-Fi For Pleasure, Feb 1982, British Hi-Fi, Valve & Transistor Amps, Digital $3.95 |
Choosing The Right Audio Amplifier For Your Home
Choosing the perfect audio amplifier can be overwhelming given the large number of different types and technologies. Regardless of your application, I will explain some essential amplifiers terms which will be useful when picking the right model.
An audio amplifier will connect your audio source with your speakers by converting the fairly weak source signal into a strong enough signal to drive your speakers.
Even though some audio sources have already a built-in amplifier, a separate amplifier gives you more flexibility for picking the model that best complements your speakers. Some of today’s mini amplifier models are small enough to hide them virtually anywhere.
When picking an amplifier, your first consideration probably is the amplifier output wattage. You will need a high wattage if you are driving speakers with a low sensitivity (expressed in dB/W), for driving speakers in large rooms or for outdoor speakers. You shouldn’t use an amplifier with significantly higher output power than your speakers can handle. Overdriving your speakers can do irreparable damage to your speakers.
However, amplifier wattage is not everything. Good sound quality is probably more important than raw power. A 20 to 50 Watt amp should be sufficient for most real-world applications.
There are two conventions for specifying amplifier wattage. The first one specifies how much power the amplifier is able to deliver continuously. That number is often called rms or continuous power. The second number is called peak or maximum power and tells how much the amp can deliver for short bursts. You should choose an amplifier that has sufficient rms power, although 10 to 30 Watts should be plenty for most applications but has enough headroom for peaks that occur in music signals.
There are other parameters that are more important than wattage when selecting an amplifier. One important parameter is called total harmonic distortion or THD in short. No amplifier is absolutely perfect and the amplified signal will include some error components which will distort the signal to some degree. THD is either expressed in percent or dB. The amount of distortion varies between amplifier models. A smaller distortion means higher audio quality. Audiophile amplifiers will have distortion numbers of typically less than 0.05%. Consumer-grade amplifiers will have distortion figures of up to 10%.
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. Consumer-grade amps will have a signal-to-noise ratio (SNR) of at least 80 dB. Higher-end amps will have an SNR of 100 dB or more. Audiophile amps will have an SNR of close to 120 dB.
There are several amplifier technologies available. Today’s amplifiers are mostly Class-D amplifiers. Class-D amplifiers have a high power efficiency and waste little energy as heat. Some of today’s mini amplifiers are no larger than a deck of cards. However, when picking a Class-D (digital) amplifier, be sure that the amplifier has low distortion and a high signal-to-noise ratio.
About the Author
Gunter Fellbaum has been engineering audio and electronic products for over 10 years. You can find additional information regarding audio amplifier technologies and mini amplifier products at Amphony’s website.
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6L6GC Hi-Fi SE Vacuum Tube Stereo Amplifier