Re: Re: OT: Occupations?
Fra: Digital Image Studio [EMAIL PROTECTED] On 03/01/07, DagT [EMAIL PROTECTED] wrote: ...or the effects of the green pen on the CD edges that was sold some years ago. That was really crap .-) True, but did you ever see the green polymer stabilizer rings that were designed to snugly fit on the edge of CDs? I actually used them on my technical test discs as they raised the disc sufficiently that I could pop them face down on a clean surface and not risk scratches (and of course the test tones had so much more depth of stereo field) ;-) No I didn't, but it sounds like a smart unintended side effect .-) DagT -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
Re: Re: OT: Occupations?
Well, I switched from OK to very expensive cables from the CD player to my good old Audiolab amplifier and didn't notice much difference, but from there to the ProAc loudspeakers the wires does, of course, get more important. There's a lot of current passing through them. As for the audiophile forums I keep away from them. Mostly because most of what they discuss is too close to pseudoscience for me, like the green pen. I haven't bought anything new for ages (except for new base elements for the loudspeakers) but when I do I'll do as I did before: Just listen carefully. As long as you know how the instruments sound for real you know how they should sound in good productions, so it is easy to compare. DagT Fra: graywolf [EMAIL PROTECTED] Well, if you can not clearly hear the difference between one brand of 10ga. wire and another, there is something wrong with your hearing. I have been reading some stuff on an audio forum and have finally came to the understanding that what folks who call themselves audiophiles mean by HiFi is excessively loud with a rather over boosted midrange. They do a lot of sneering at the uninformed who think HiFi means excessively loud with over boosted bass. And, of course, dumb old farts like me, always have the treble turned up way too high and can not here the difference between those brands of wire. DagT wrote: Den 2. jan. 2007 kl. 23.00 skrev Digital Image Studio: On 03/01/07, Margus Männik [EMAIL PROTECTED] wrote: I suspect that most of the hi-fi enthusiasts don't know and doesn't care what MOSFET stands for and what it really means... ;) Yes, they are too busy trying to hear the difference between digital interconnects :-) ...or the effects of the green pen on the CD edges that was sold some years ago. That was really crap .-) DagT -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
Re: Re: OT: Occupations?
On 03/01/07, DagT [EMAIL PROTECTED] wrote: Well, I switched from OK to very expensive cables from the CD player to my good old Audiolab amplifier and didn't notice much difference, but from there to the ProAc loudspeakers the wires does, of course, get more important. There's a lot of current passing through them. I've got nice practical cables for my interconnects, inexpensive but good enough to be used for audio, video or digital data, I don't discriminate :-) However for my speaker cables I've used plain old Supra for years, it's good quality low impedance cable (which is ultimately all that matters). -- Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://home.swiftdsl.com.au/~distudio//publications/ Pentax user since 1986, PDMLer since 1998 -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
Re: Re: OT: Occupations?
Fra: Boris Liberman [EMAIL PROTECTED] On 1/3/07, DagT [EMAIL PROTECTED] wrote: I find it very convenient to have just plain stereo. Even with DVDs and all these multi channel sound tracks I get certain degree of reality. Of course 5+1 or 6+1 setup of similar quality would do better, but it will be real big PITA to haul this thing from one rented apartment to another ;-). Another thing is that the number of speakers will dominate your livingroom .-) I have no intention to get more than two channels for listening to music. Music has always been made and arranged so that we have the sound coming from a large or small scene so that is enough. Also, a good pair of speakers can make an illustion of three dimensions so you can hear the singer is standing close to you or at a distance. Sorround systems may be OK for movies, but I do not want to feel that I am part of orchestra. I want to be at one of the first seats in front of it .-) DagT -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
Re: Re: OT: Occupations?
Fra: Digital Image Studio [EMAIL PROTECTED] On 03/01/07, DagT [EMAIL PROTECTED] wrote: Well, I switched from OK to very expensive cables from the CD player to my good old Audiolab amplifier and didn't notice much difference, but from there to the ProAc loudspeakers the wires does, of course, get more important. There's a lot of current passing through them. I've got nice practical cables for my interconnects, inexpensive but good enough to be used for audio, video or digital data, I don't discriminate :-) However for my speaker cables I've used plain old Supra for years, it's good quality low impedance cable (which is ultimately all that matters). I agree. They should have low and frequency- and current-independent impedance within the range suitable for the speakers and amplifier, and the easy way to achieve this is to make them thick. My cables are constituted by two pairs of fairly thick wires positioned so that they make a quadropole. I think the idea is that they make a very simple coaxial cable which does not generate to large external field, but the most important thing is that they can get a lot of current through without rising the resistance. I think my amplifier is capable of pulses at 8A and I'm sure the cables can take a lot more than that. DagT -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
Re: Re: OT: Occupations?
On 03/01/07, DagT [EMAIL PROTECTED] wrote: I agree. They should have low and frequency- and current-independent impedance within the range suitable for the speakers and amplifier, and the easy way to achieve this is to make them thick. My cables are constituted by two pairs of fairly thick wires positioned so that they make a quadropole. I think the idea is that they make a very simple coaxial cable which does not generate to large external field, but the most important thing is that they can get a lot of current through without rising the resistance. I think my amplifier is capable of pulses at 8A and I'm sure the cables can take a lot more than that. My speakers are magneto-planar and so present a fairly resistive 5 ohm load but they are very inefficient so require a lot of power. Thankfully the mono-blocks that I use to drive them will deliver lots and lots of power into a loads as low as 0.6 ohms. And in order to minimize the system impedance so that I can make the most of the very low damping factor of my amps I run a short 1m length of old Supra 10mm2 cable, it keeps the bass tight ;-) -- Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC(GMT) +10 Hours [EMAIL PROTECTED] http://home.swiftdsl.com.au/~distudio//publications/ Pentax user since 1986, PDMLer since 1998 -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
Re: Re: OT: Occupations?
Fra: Digital Image Studio [EMAIL PROTECTED] On 03/01/07, DagT [EMAIL PROTECTED] wrote: I agree. They should have low and frequency- and current-independent impedance within the range suitable for the speakers and amplifier, and the easy way to achieve this is to make them thick. My cables are constituted by two pairs of fairly thick wires positioned so that they make a quadropole. I think the idea is that they make a very simple coaxial cable which does not generate to large external field, but the most important thing is that they can get a lot of current through without rising the resistance. I think my amplifier is capable of pulses at 8A and I'm sure the cables can take a lot more than that. My speakers are magneto-planar and so present a fairly resistive 5 ohm load but they are very inefficient so require a lot of power. Thankfully the mono-blocks that I use to drive them will deliver lots and lots of power into a loads as low as 0.6 ohms. And in order to minimize the system impedance so that I can make the most of the very low damping factor of my amps I run a short 1m length of old Supra 10mm2 cable, it keeps the bass tight ;-) .-) I knew a guy who had something like that, and he claimd that he could see the effect of the volume control on the power meter he had for his house. In his case it helped to turn on the stereo if when the house was cold in the winter. If I wasn't before I'd certainly be convinced now I don't need new cables... DagT -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
Re: RE: OT: Occupations?
Tim Øsleby wrote: Is what you are saying that MOSFETs takes more beating without going up in smoke? If that's the case, this would explain why they are used a lot in PA audio systems. Basically, that's the case. The thermal runaway problem Rob mentioned is the tendency of bipolar transistors to pass more current when they get hot. This makes them get hotter. Which makes them pass more current. Which makes them get hotter. In a repeating cycle until they fail. Since MOSFETs don't respond this way, they can be more durable in applications calling for continuous high power output. BTW: MOSFETs are also commonly used in the other end of your stereo signal chain: At the front end of radio receiver front end circuitry. Very tiny MOSFETs are also the active ingredient in CMOS image sensors :) -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
