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#1
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Voltage conversion on a Hafler P3000
Being in Australia, I'm wondering whether it's worth me getting a
Hafler Transnova P3000. The only question is the voltage - in Australia, it's 240v. How easy is it to convert this to 240v? Is it just a question of getting a step-down transformer? Gerry |
#2
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Voltage conversion on a Hafler P3000
How easy is it to convert this to 240V? Is it just a question
of getting a step-down transformer? Yes, but it'll be a rather large and expensive transformer. I owned the original TransNova amp, and after about a year or so, decided I didn't like its tonal balance. |
#3
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Voltage conversion on a Hafler P3000
Gerry wrote:
Being in Australia, I'm wondering whether it's worth me getting a Hafler Transnova P3000. The only question is the voltage - in Australia, it's 240v. How easy is it to convert this to 240v? Is it just a question of getting a step-down transformer? No. A step-up transformer, which will double your radiated fields. Better bet is to replace the internal power transformer. Some gear (not usually gear made for the US market) may have a transformer with 110 and 220/240v taps already inside. geoff |
#4
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Voltage conversion on a Hafler P3000
William Sommerwerck wrote:
How easy is it to convert this to 240V? Is it just a question of getting a step-down transformer? Yes, but it'll be a rather large and expensive transformer. I owned the original TransNova amp, and after about a year or so, decided I didn't like its tonal balance. Did it have some odd frequency response slope ? geoff |
#5
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Voltage conversion on a Hafler P3000
Gerry wrote:
Being in Australia, I'm wondering whether it's worth me getting a Hafler Transnova P3000. The only question is the voltage - in Australia, it's 240v. How easy is it to convert this to 240v? Is it just a question of getting a step-down transformer? There are three possibilities: 1. You get an external step-down transformer 2. You replace the internal power transformer with a 240V one. 3. You restrap the internal power transformer for 240V. Which of the three of these you want to do depends on the particular piece of equipment. I don't have a P3000 service manual onhand, but if you write to Hafler and ask them what is involved (ie. does the transformer have dual primaries and if not how much is one with a 240V primary?) they should tell you. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#6
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Voltage conversion on a Hafler P3000
I owned the original TransNova amp, and after about
a year or so, decided I didn't like its tonal balance. Did it have some odd frequency response slope? It sounded slightly up in the bass and treble, slightly down in the midrange. I switched to a Hafler XL-280, which was subjectively more neutral. |
#7
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Voltage conversion on a Hafler P3000
On Mar 16, 9:47 am, (Scott Dorsey) wrote:
snipped if you write to Hafler and ask them what is involved (ie. does the transformer have dual primaries and if not how much is one with a 240V primary?) they should tell you. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." Thanks, Scott. I've just done that (and should have done that at the start!). Kind Regards, Gerry. |
#8
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Voltage conversion on a Hafler P3000
Geoff wrote:
Gerry wrote: Being in Australia, I'm wondering whether it's worth me getting a Hafler Transnova P3000. The only question is the voltage - in Australia, it's 240v. How easy is it to convert this to 240v? Is it just a question of getting a step-down transformer? No. A step-up transformer, which will double your radiated fields. Ooops, you are right 'step-down' - I wuz thinking the other way around ! geoff |
#9
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Voltage conversion on a Hafler P3000
"Geoff" wrote in message
William Sommerwerck wrote: How easy is it to convert this to 240V? Is it just a question of getting a step-down transformer? Yes, but it'll be a rather large and expensive transformer. I owned the original TransNova amp, and after about a year or so, decided I didn't like its tonal balance. Did it have some odd frequency response slope ? Consider the source of the comment - someone whose self-identity is highly dependent on hearing vast differences between all sorts of things. Later on he essentially says that all hard dome tweeters interact with amps one way, and all soft dome tweeters interact with amps in some other way. In reality, nothing is that simple except expectations and prejudices. |
#10
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Voltage conversion on a Hafler P3000
William Sommerwerck wrote:
How easy is it to convert this to 240V? Is it just a question of getting a step-down transformer? Yes, but it'll be a rather large and expensive transformer. I owned the original TransNova amp, and after about a year or so, decided I didn't like its tonal balance. Did it have some odd frequency response slope ? Consider the source of the comment -- someone whose self-identity is highly dependent on hearing vast differences between all sorts of things. Later on he essentially says that all hard dome tweeters interact with amps one way, and all soft dome tweeters interact with amps in some other way. Actually, he was referring to a particular amp, not all amps. In reality, nothing is that simple except expectations and prejudices. Let us briefly return to what is supposed to have been a closed can of worms. Back in the early 80s, I bought a complete Acoustat system -- four Six speakers, two TNP preamps, two TNT power amps. After a year or so I decided I didn't like the system's overall balance (which, as described above, was pretty consistent across all recordings) and switched to Denon preamps and Hafler XL-280 power amps, which I found much more satisfactory. Over the years I gradually came to the conclusion that, whether or not there were significant audible differences among electronics, I could not reliably describe them. This was one of the two principal reasons I quit reviewing (the other being the relatively low pay). Now... I've owned a number of "good" systems over the past 35 years. The one thing they had in common -- regardless of the room, speakers, or electronics -- was that they all sounded somewhat veiled and lacking in detail (at least with commercial recordings). I often could not easily hear the things record reviewers described. My systems also sounded a bit distant and lacking in the "presence" of live sound. For reasons I won't go into, I was obliged to divest myself of the expensive amplifiers that drove my Apogee speakers. As (I think) I reported here, my first attempt was with Crown K1 amplifiers. They sounded horrible, and Dr. Clay Barclay, who used to be one of Crown's honcho, actually apologized to me that, had he still been at Crown, the K1 would never have been manufactured. I didn't know where to go next. With some trepidation, I ordered two Parasound A21 amplifiers. (Disclaimer -- their designer, John Curl, an audio legend in his own time, is a friend.) They're not spec'd below 4 ohms, and the Apogee Divas are a little more than 3 ohms. Well... I got one of the biggest shocks of my audio life when I turned them on. The sound of the system was completely transformed. I finally had the detail and presence I'd been looking for 35 years. (When I discussed this with JGH, he remarked that he'd always found my previous amps to be rather backed-off in the midrange.) I've never enjoyed listening to recorded music as much, and I'm gleefully rediscovering my record collection. (When I get another three A21s, I'll be able to experience full surround.) Caveats? The overall sound is a bit "vivid". This isn't a problem with simply miked "audiophile" recordings, but with most others, you're a little too aware that the top end isn't as smooth or clean as it might be. Look... I'm not suggesting you should rush right out in a buying frenzy -- or buy an A21 without auditioning it. But it you're buying a new system, or aren't happy with your current amplifier, you should give the A21 a listen. End of shameless promotion. |
#11
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Voltage conversion on a Hafler P3000
"William Sommerwerck" wrote in
message William Sommerwerck wrote: How easy is it to convert this to 240V? Is it just a question of getting a step-down transformer? Yes, but it'll be a rather large and expensive transformer. I owned the original TransNova amp, and after about a year or so, decided I didn't like its tonal balance. Did it have some odd frequency response slope ? Consider the source of the comment -- someone whose self-identity is highly dependent on hearing vast differences between all sorts of things. Later on he essentially says that all hard dome tweeters interact with amps one way, and all soft dome tweeters interact with amps in some other way. Actually, he was referring to a particular amp, not all amps. In your apparent rush to judgment William, you've missed a highly important point and my main point, which is that all hard dome tweeters won't react the same to any amp or all amps, and in a way that is consistently and significantly different from how all soft dome tweeters react to any amp or all amps. IOW, there are important differences among tweeters aside from how the manufacturer characterizes the material the domes are made. For example tweeters have significant construction differences like whether or not they use ferrofluid, and which of the many kinds of ferrofluid they use, for just one tiny example of the manifold differences among tweeters There is even a possibility that one manufacturer may characterize a given material as hard, and another may characterize the identically same material as being soft. For example, polycarbonate is hard compared to silk, but soft compared to beryllium. If a manufacturer's stiffest dome is made of polycarbonate, than this may be his "hard dome" tweeter. But, if another manufacturer's stiffest dome is made of beryllium, then the polycarbonate dome may be his "soft dome" tweeter. Yet we have a listener who said that his amp works one way with *all* hard dome tweeters and a characteristically different way with *all* soft dome tweeters. Given all the other possible differences among tweeters, this is simply impossible. Either the amp works the same with all tweeters (highly unlikely because "works the same" can mean so many different things), or it works a little differently with every tweeter, aside from just one of the many features of how tweeters are constructed. In reality, nothing is that simple except expectations and prejudices. Now that I've clarified what was supposed to be the main issue all along William, please comment again. |
#12
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Voltage conversion on a Hafler P3000
Now that I've clarified what was supposed to be the
main issue all along William, please comment again. Yes. I read what you posted "backwards". Other than my remarks about the A21, I have no other comments. |
#13
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Voltage conversion on a Hafler P3000
William, for what it's worth, my observations about the TNT-200
and XL-280 are very similar to yours. Ironically, while I found the TNT-200 less than optimal driving my Acoustat 2+2's, they bring a tremendous amount of detail out of soft dome speakers such as the original KEF Reference IIIs. Their seeming slight high-end rise might explain part of that. I use a Parasound HCA-2200ii to drive the Acoustats, with better tonal balance. I'll tell John Curl. He'll be pleased. |
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