STEREO AMPLIFIER, 20W / CHANNEL

CAT# AMP-15
$25.95 each
Quantity:  
 
Great stereo sound for home, business or workshop. Ideal for music or PA applications, this 20W per channel amplifier was designed for use in a portable outdoor music system. Easy to connect - the speakers connect to pigtail leads and a 3.5mm phone plug is provided for input of a computer, iPhone, AppleTV or other music source. There are no external controls; volume is controlled from the music source. But, using an iPhone or comparable source, you get plenty of volume adjustment, from silent to quite loud. A button on the front panel mutes the sound. It glows green when on, red when mute. Also has a 120Vac output cord for connection of other auxiliary equipment. Heavy-duty metal cabinet, 9.5" x 8.5" x 2".
Spec sheet available in PDF format.
Average Customer Review:  (7 Reviews) Write A Review

Customer Comments

Average Customer Review:  (7 Reviews) Write A Review

A customer from COLTON, SD USA
Quality amplifier
This is a very well made amplifier, that uses a class D (TDA8922B) 2x50W device. It's sealed up for outdoor use, and had a generous circuit board if you wish to engineer adaptations. It sounds great.

A customer from TULSA, OK USA
Wowzers!
Our train club wanted to do some cute stuff with sound, so I ordered 4 Sanda MP3 players and one of the amps as a test rat. If you're much into "ripping" MP3's, done correctly, the Sensa will work fine with a GOOD 8 gig micro card. Connected to a pair of good home stereo speakers thru this amp, the sound when someone presses the "RED BUTTON!", of a real train going past at 50MPH I recorded with some borrowed AKG shotguns to an MPEG4 files, sounds like the train roaring by you. The pigtail speaker leads are minus 1/2, no DC power option is -3/8, and - 1/8 for no volume control (fixable) and the fixed wires out the back. The AC out is fine if you need a semi "Panasonic" type plug.
The sound quality is excellent, and honestly, it sounds better than the $40-50 20WPC chip-amp semi-kits from the Pacific Rim e-tailers. If you have a 5.1 or 7.1 soundcard in your desktop, for this price, get three of four of them, go on the 'net to get some easy-to-build, not high-buck DIY mini-monitors and mini-sub, and kick it in your home office/corner.
The A-E buyer who got these deserves a raise and a steak and lobster dinner!

A customer from OLATHE, KS USA
Watch out for subwoofers! Works great bridged, too!
Very nice amplifier! Be careful when connecting to subwoofers. The two channels amplify out-of-phase, and the speakers are then also connected out-of-phase for no net inversion. (This is done to halve the peak current requirements on the power supplies, as described in the TDA8922B data sheet.) Some subwoofers assume that the negative lead on the speakers share a common ground, so if you connect both channels of the AirGo, one channel will be shorted out. The work-around is to only connect one channel to the subwoofer, using the green (ground) and white (positive) outputs. Most music sources have low frequencies shared equally on both channels, so this works fine. An alternative work-around is to use separate subwoofers, with the first (green/white) channel wired normally into its main speaker and subwoofer, but with the second (red/black) channel wired out of phase into its subwoofer (red=ground, black=hot), and the phase switch on this subwoofer set opposite to that on the first channel. (The main speaker should also be connected out-of-phase to the subwoofer's speaker output.)

Makes a great single-channel bridge amplifier, too. Connect the inputs in parallel and connect an 8+ ohm speaker to the white and black outputs. Here are the measured results:

65W RMS into 8 ohms, bridged (inputs parallel, white and black outputs)
1.3V PP for full output

at half-amplitude output (650mV PP in):
-3dB at 10Hz and 25kHz
harmonics more than -50dB at 1kHz, -40dB at 10kHz

A customer from Bronx, NY USA
Easy Does it
This unit is sturdy built, neat looking and it works GREAT. It has replaced a wireless Bluetooth speaker that needed constant recharging. No-nonsense, truly plug and play.

A customer from S. Kalifornia
Incredible Value!
For the quality of parts, build quality, and performance, this amp is a great deal! It may be "overbuilt" and kinda big but for the price you make compromises (just move that crap away on your shelve to make room). The input and speaker wires can redone with jacks/terminals since the cable are on terminal connectors to the main board.