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Thread: A remarkable little amplifier.

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    Senior Member Mark Harwood's Avatar
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    Default A remarkable little amplifier.

    Out in the garden or shed I like to use a portable stereo system that's based on an amazing device called the "T-Amp".
    It's a 12 Volt amplifier, with power input and a compartment for eight AA cells. I run it on cells, as it's very efficient. The reason for that is that it's a Pulse Width Modulation (PWM) amplifier. You may like to research the technical aspects on the Web, and you'll need to use the Web to find one too, but what that means is that it produces very little heat.
    The sound is stunning. The output is effectively 6 Watts per channel, but using efficient and low impedance 'speakers (4 Ohms is said to be ideal, but my 6 Ohm pair work just fine), there is plenty of sound for casual listening. The clarity, openness, and depth are beyond the abilities of much more expensive domestic kit. It may be hard to believe that a flimsy-looking little thing, weighing only a few ounces and powered by batteries, is probably better than your cherished hi-fi, but trust me and try to track one down. Expect to pay £25-30. They're available in the USA; I got mine in England second-hand.
    So what I've done is to tape together an old pair of Mordant-Shorts, tape the T-Amp loosely to the top, and wire them together with enough 'speaker wire to allow replacement of cells. The CD source is a Sony personal CD player. Some Sonys have a Line output option, which is ideal. The sound quality from models such as the D-NE series is real hi-fi.
    As a result, I believe I have one of the best-sounding portable systems in the world.
    "Music is a social act of communication among people, a gesture of friendship, the strongest there is."
    - Malcolm Arnold.

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    Senior Member Mark Harwood's Avatar
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    These amplifiers are being imported now, and cost about £80. They are still excellent value. More powerful PWM amplifiers are now available too, at sensible prices.
    "Music is a social act of communication among people, a gesture of friendship, the strongest there is."
    - Malcolm Arnold.

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    sounds absolutly spiffing
    Mozart was a cheat

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    Senior Member Mark Harwood's Avatar
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    It looks different, Mr. Terrible, but the tech. specs look similar. Grab it. One strength of these things is the damping factor, which is enormous; as I understand it, that means that the amp controls the speaker firmly, & is immune to the signal that the speaker sends back. You're the tech head, please expand on this. What I understand well is that is sounds amazing even with ordinary source & speakers.
    "Music is a social act of communication among people, a gesture of friendship, the strongest there is."
    - Malcolm Arnold.

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    Senior Member Mark Harwood's Avatar
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    It broke down. There's no fixing that kind of thing that I know of, so now the shed has a nice little 2.1 system instead. Maybe one day there'll be another PWM amp. there; it was nice while it lasted.
    "Music is a social act of communication among people, a gesture of friendship, the strongest there is."
    - Malcolm Arnold.

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