My two cents: 1) George is an extremely rude individual. Would you honestly speak to people in person the way you do here? Why go out of your way to insult an engineer who designs and builds excellent products and is wiling to impart information? Are you willing to share your audio CV so we have an understanding of your expertise, as your comments do not suggest you do not have much of an understanding of even basic electrical concepts (i.e. ohm’s law)? 2) Atmasphere is extremely patient. Thank you you for continued information. Your posts are always informative for those looking for more technical information without getting deep into the math. |
George, You seem to misunderstand how amplifiers work. Take your ML2 monoblocks. They put out 14.14 volts max to make their 25 watts at 8 ohms before clipping. At 8 ohms, they are flowing 1.76 amps of current. At 4 ohms, they are still at 14.14 volts, but 3.53 amps of current. 2 ohms, now up to 7.07 amps and 100 watts of output. We will ignore anything below that, as the CS5s don’t dip below 2 ohms until the subsonic range (and even trying to put 100 watts through the 8" woofers below 20hz will cause them to exceed their excursion limits). Now lets take a Class D amp, say the Ncore NC400 for DIY. It is rated at 200 watts at 8 ohms, 400 at 4 ohms, and 580 at 2 ohms. It has a maximum current capability of 22 amps per the manufacture. Lets only run it at 100 watts into 8 ohms, where it will be 28.28 volts and 3.53 amps. 4 ohms, still 28.28 volts nets us 200 watts, and 7.07 amps. 2 ohms, still 28.28 volts, 400 watts output, now we are at 14.14 amps, or twice the current of the Levinson and still well under the manufacture's limit of 22 amps. An amplifier doesn’t put out more current than a speaker needs to reach a set voltage. The Ncore will maintain twice the power output as the Levinson down to 2 ohms (and below even). These are the laws of physics and why amplifier designers speak in terms of voltage, not current capability, except to establish the minimum impedance a given amplifier maintain its voltage. Put another way, even a cheap receiver can drive 2 ohm speakers, but will do so at a far lower output than at 8 ohms. |
Wait, so George is Peter? It all started in 1976 when Peter Stein of “ME Sound” started manufacturing high-quality audio amplifiers in Australia. Sadly in October of 2003 circumstances led to the close-down of manufacturing operations. Since that time they have not left their loyal customers totally in the cold, but have been provided advice and repairs wherever possible, within the resources and time frames available. Many models and units were built during those 26 years and the advice I’ve heard is that they are extremely reliable and serviceable for many years to come. Notice he says manufactures. George has never designed a thing in life. Just resurrected a company from the dead, but it doesn’t appear any have actually been made and sold. http://www.meamplifiers.com.au/me-history-news.html Ironic that George calls others shills. Just part of his classic psychological projecting. |
Typical George, nothing to show, so attempts to distract. Here is your chance George, show us your designs and products. Wait, weren’t you going to stop replying to this thread a few days ago? I would still appreciate a response showing my calculations which refute your unfounded claims that a ML2 will outdrive a Ncore 400 amp into low impedance loads are somehow flawed. It should be easy for you given your expertise. |
Viber6, I believe most equipment designers/engineers are pretty clear that there are two aspects of designing a new piece of equipment, the engineering side of designing, then the black art of voicing. I believe both Jason Stoddard of Schiit and Paul McOwen of PS Audio have been clear that there is an aspect of equipment engineering where the science says changes shouldn’t make a difference in the sound, but yet they do. |
