Dimensions: 14’ × 10’ Small
The folks at Ohm would love to have us believe that there "is no place like Ohm." I know Dorothy believes that, but last time I listened to the Walsh 5 there were enough things wrong with it to spoil the Ohm-coming. To be sure, there was plenty of imaging magic; you might even say that, indeed, "there's no space like Ohm." But a slightly opaque and colored midrange seriously curtailed my enthusiasm for the speaker. All puns aside, I firmly believed back then that this was a speaker on the verge of greatness. So when Ohm let it be known late in 1987 that the Walsh 5 had been revised, I was naturally more than interested in a relisten.
I was unable to specifically pin down the nature or extent of the modifications, but even after a quick initial listen my impression was that the speaker had been significantly improved. The midrange was smoother and considerably more transparent. I suppose that transparency and disdain of boxy colorations are acquired tastes; years of intimacy with electrostatics have made me quite intolerant of muddled resonant boxes. The art has advanced greatly in the last 50 years, yet dynamic moving-coil manufacturers are still boxing box resonances. Heroic enclosures like the one used in the Celestion SL600 are a step in the right direction. Not surprisingly, the mini-monitors, the miniature boxes, are the least boxy-sounding because of the reduction in panel area: there is simply less radiating surface. Unfortunately, most little boxes are bass cripples. A good example of this is the ProAc Tablette. Its lack of bass and gratuitous brightness conspire to give it an artificial sense of transparency which many people like. I know I liked it. But J. Gordon Holt, Mr. Tonal Balance, was appalled: "violins sound like toy violins," he would complain. But Gordon, what do you expect from a castrato anyway?
Oppo, and most dvd/bluray players stock power board is of SMPS (switch-mode power supply), due to their efficiency, low cost and ease of manufacturing.
SMPS provides high current, low and multiple voltages easily and cheaply.
They generate a lot RFI (radio frequency interference) at the switching frequency of the supply.
Linear Power Supply provides clean constant voltage and stable current at the output stage.
It provides isolation between the output and input because of the toroidal transformer.