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Tallus's new AMP152 is an economical, easy means to add quality whole house audio to your automated home. The novel amplifier design occupies an unused PC expansion slot and is powered by the PC power supply. The PC sound card audio output simply plugs into the input of the amplifier board. Speaker leads just plug in and you have a zone of audio!

Amplifier Design:

The AMP152 is a new T-Class design which is a high efficiency, high audio quality design. High efficiency allows for a small heat sink free design that won't add much heat to the interiour of the PC case. Power consumption is also minimized allowing reuse of the PC power supply for clean, regulated power. The design also has a very small footprint, which allows for room inside the PC.

But the real benefit of T-Class is the audio quality. This design has been favorably compared to amplifiers costing many times the price. Class T amplifiers offer both the audio fidelity of Class AB (likely found in home stereo receivers) and the power efficiency of Class D amplifiers (usually used in subwoofer amps).With inexpensive PC sound card audio quality exceeding almost all high end audio processors, you can have a quality audio experience at the low price of the AMP152. The AMP152 is perfect to drive high efficiency in wall speakers.

The modular design of the AMP152 makes it super easy to add another zone of audio. Just add another AMP152 card and plug it in! The AMP152 is a perfect mate for MusicLobby 3 multizone audio system. MusicLobby 3 controls the zone's volume of the PC's sound card, which feeds into the AMP152. Installed in the PC, it leverages low cost case and power supply that you already purchased making for a clean, economical alternative to traditional standalone whole house audio controllers.

Amplifier Specifications:

Class-T architecture  
Single Supply Operation 
Audiophile Quality Sound 
 0.03% THD+N @9W, 4 Ohm 
 0.18% IHF-IM @1W, 4 Ohm 
 11W @4 Ohm, 0.1% THD+N 
 6W @8 Ohm, 0.1% THD+N 
Room Filling Power  
 15W @ 4 Ohm, 10% THD+N 
 10W @ 8 Ohm, 10% THD+N 
High Efficiency  
 81% @ 5 W, 4 Ohm 88% @ 10 W, 8 
Dynamic Range = 102 dB 
Each AMP152 supports two channels of audio (one Zone)  
Occupies one PCI case slot. Does not require insertion into motherboard slot. - cannot be installed over motherboard slots that have tall electronic components near the expansion slot 

Purchase AMP152 [AMP152 Buy Link]


Shut down the PC.

Find a PCI slot that does not have tall components that might interfere with the AMP152 installation. Best is to use a slot that is not nearby high heat producing PC cards (like a video card).

Remove the blank slot filler by removing the attaching screw.

Replace the blank slot with the AMP152. Make sure the AMP152 is not contacting any other electrical components on other cards, or the motherboard. Replace the attachment screw to affix the card in the PC.

Connect an unused Molex 4 pin power supply wire to the corresponding connector on the AMP152. The AMP152 comes with a "Y" adapter to splice into an already used power supply line if no unused are available.

Make sure your power supply has enough reserve current to handle the PC's needs, as well as the AMP152(s) needs.

Install additional AMP152 cards as needed (one per zone of audio).

Take a minijack stereo patch cord and plug it into the PC sound card's sound output. See your sound card's documentation for which jack to use. Plug the other end into the AMP152 audio input connector.

Take the mono minijack wire (included with AMP152) into one of the AMP152's output channels. Connect the bare end of this wire to your speaker. Make sure the wires to the speaker are of correct gauge for the distance that your speaker is from the PC. Thicker for longer distance. Ideally and normally, this wire should be multistranded for best audio reproduction. Make sure there are no electrical shorts in the speaker wire and that the end of the wire is properly terminated to a speaker that can handle the audio output of the AMP152. Since the AMP152 is intended for ambiant listening areas and does not put out high power, the speaker should also be of a relatively efficient design.

Connect the second speaker in the same way as the first, but to the second channel's audio output.

Power up the PC and start playing music!