Re: [SlimDevices: Audiophiles] Buying a transporter these days
drmatt wrote: > Speaker drivers are incredibly reactive to input frequency and this is > what dominates the varying impedance of most speaker cabinets. Physics > dictates this. It's easy to push a cone that's oscillating at its > resonant frequency and very hard to push it significantly faster than > this. The crossover electronics should not be a major part of this > phenomenon. > > Not that any of this matters to the end user. > > One factor not thus far discussed is that in small rooms sitting fairly > close to speakers you can wind up in a near field monitor type scenario, > whereby the sound coming to your ears is predominantly direct from the > speakers rather than standing waves or reflected off other room > surfaces. Add in large amount of typical living room furniture and that > means you can quite successfully have large speakers in small rooms, as > long as you sit in the right place.. this probably explains why I get > away with a pair of 804s in a small room fed by a Naim amp. > > > > -Transcoded from Matt's brain by Tapatalk- Hi Doc! I must confess that I have been bamboozled into thinking that the mechanical impedance of the speaker cabinet was a separate phenomenon (& I thought, a mostly resistive effect causing dissipation of unusable power as heat energy in the voice coil that is mechanically prevented from moving by the inertia of the air within the speaker enclosure) from electrical impedance. Perhaps I have misunderstood this. Your 804's are really not that much bigger than my 805's, & are probably less affected by being placed close-ish to neighbouring walls than larger floor-standers, although there must be some bass reinforcement from this. Studio oriented near-field monitors are intended for close range listening for sure (primarily by ensuring that the drivers in them integrate well at a very short listening distance), but the mixing desk one is meant to be sitting at when using them (which they would be sitting right on top of) would not ideally itself be jammed up against a wall. I think that this is a separate issue from domestic listening room acoustics, with respect. I'm not meaning to be unnecessarily argumentative, just seeking clarity myself really. As long as you're getting a musical experience that suits you, that's fine really... Dave :cool: Golden Earring's Profile: http://forums.slimdevices.com/member.php?userid=66646 View this thread: http://forums.slimdevices.com/showthread.php?t=107946 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] FS : Logitech Transporter
badboygolf16v wrote: > Thanks for the advice Dave. Hi! I'm going to blame my excellence at producing Bombay Sapphire G&T's for missing your initial clue about the original Henry Ford colour scheme, lol. It appears that I too have a production line in operation... :rolleyes: Don't think you'll have too much trouble shifting it - obviously there was a bidder on eBay who chased me up to £450 earlier this year, & apart from a seller in the US who last time I checked was trying to knock out an unused Trans-Nav model for $999, which works out quite pricey if you've got to ship it to Europe & pay import duty + VAT (or equivalent) they're as rare as hen's teeth, so eBay is worth a shot (with a sensible reserve, of course) if you don't get any takers here. How far are you prepared to ship it? Dave :cool: Golden Earring's Profile: http://forums.slimdevices.com/member.php?userid=66646 View this thread: http://forums.slimdevices.com/showthread.php?t=108015 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Buying a transporter these days
Speaker drivers are incredibly reactive to input frequency and this is what drives the varying impedance of most speaker cabinets. Physics dictates this. It's easy to push a cone that's oscillating at its resonant frequency and very hard to push it significantly faster than this. Not that any of this matters to the end user. One factor not thus far discussed is that in small rooms sitting fairly close to speakers you can wind up in a near field monitor type scenario, whereby the sound coming to your ears is predominantly direct from the speakers rather than standing waves or reflected off other room surfaces. Add in large amount of typical living room furniture and that means you can quite successfully have large speakers in small rooms, as long as you sit in the right place.. this probably explains why I get away with a pair of 804s in a small room fed by a Naim amp. -Transcoded from Matt's brain by Tapatalk- -- Hardware: 3x Touch, 1x Radio, 2x Receivers, 1 HP Microserver NAS with Debian+LMS 7.9.0 Music: ~1300 CDs, as 450 GB of 16/44k FLACs. No less than 3x 24/44k albums.. drmatt's Profile: http://forums.slimdevices.com/member.php?userid=59498 View this thread: http://forums.slimdevices.com/showthread.php?t=107946 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Buying a transporter these days
Antoniop wrote: > Hi Dave, > I've never heard of the Reynauds too, they 've an excellent reputation > but there are not many in the auditoriums. Focal are quite easy to find, > for the less expensive products. > > Choosing a pair of speakers will be a lng process for me, I'm not > easy to make up my mind ! > Thanks again for your help > Antonio Hi Antonio! I don't blame you in the slightest for wanting to take your time over speaker selection. Have you got the rest of your system in place? The kind of speakers that will be likely to sound best in your room are almost certainly 2-way designs (whether full-range floor-standers, or stand-mounts which will inevitably be slightly lacking in the bottom octave of the bass register although with compensating advantages which I hope that I have already sufficiently explained in my previous posts), & an incidental bonus because of this is that they are likely to present a relatively well behaved impedance load on your power amplifier because they usually have fairly simple passive crossovers. It is the capacitors & inductors in the crossover network which create the reactive portion of the loudspeakers impedance (the drivers themselves present a purely resistive load). The impedance of any speaker system will vary with frequency & it is often possible to find a published graph of impedance vs. frequency (either by the speaker manufacturer themselves or in a decently conducted review of them). No loudspeaker has a flat impedance curve, but there should be no pronounced sharp peaks or troughs since the effect of these is likely to become audible, at least with some programme material. Smaller wobbles & gentle rises or falls are much less likely to cause the kind of effect on a music programme that your brain will not quickly learn to compensate for (the science of psycho-acoustics is not an area in which I can profess any real technical expertise - suffice to say that it's a complex subject & one in which our understanding remains less than total). >From your power amplifier's viewpoint, as it attempts to deliver its power bandwidth (that's power vs frequency) linearly into the loudspeaker, it is the reactive element of impedance arising from the speaker's crossover network that is the part which *-might-* cause some problems for a lesser amplifier. But the truth is that most amplifiers currently available are actually pretty good designs (the cut-throat nature of the audio industry has seen to that) & certainly power amplifiers with solid-state (bipolar or field effect transistor) output stages should have no difficulty as long as the impedance doesn't fall too low - such amps can be switched on with no speakers connected at all, but will expire rapidly should you contrive to short circuit their output - so going below their recommended *-minimum-* impedance rating carries the risk of creating audible instability (although they are unlikely to actually blow up! :D ). Valve output stages are the opposite - they will survive a short circuit without any problem, but will start blowing their output valves quickly if they have no load at all. They also tend to require more careful speaker matching & may have different taps of an output transformer for speakers of various nominal impedances. Some people swear by valve power amplifiers, but they then seem to spend half their life subsequently "rolling2 tubes & switching speakers in a never-ending quest for nirvana: the MOSFET's in my Pathos amp are just fine by me. The practical matters arising from these issues: 1. it is*- -**-always-* a good idea to switch all your gear off (& then give the capacitors in the power supplies a couple of minutes to fully discharge) before adding or removing any cables; 2. if you are using a solid state amplifier it is worth putting insulating tape around any metal parts of the amplifier or speaker posts that are still exposed once the connections are made (to minimise the risk of an accidental short circuit) &, if you make up your own speaker cables (as I do from decent oxygen-free copper speaker wire) it is also a good idea to offset the cable lengths of the +ve & -ve wires at either end so that if either end of your cabling somehow becomes detached it is much less likely that the now exposed plugs or wires will come into contact with each other; & 3. if you are using a valve amplifier, rig up some form of cable clamping at either end to make damn sure that neither end of the speaker cable can come loose... You will obviously have to audition your speakers at a dealership with demonstration facilities. High-end dealers will usually offer to let you then have your choice of speaker for extended home trial on the basis that you can return them in exchange for a different set from their supported brands if you are not satisfied within that trial period. This is good dealership practice, but also great salesmanship because firstly they will expect to sell at full retail price & se
Re: [SlimDevices: Audiophiles] FS : Logitech Transporter
Golden Earring wrote: > > Dave :cool: Thanks for the advice Dave. badboygolf16v's Profile: http://forums.slimdevices.com/member.php?userid=19486 View this thread: http://forums.slimdevices.com/showthread.php?t=108015 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
Re: [SlimDevices: Audiophiles] Buying a transporter these days
In truth whatever you choose your ears will adapt to it and unless it's chronically ill suited to your tastes it will be quite enjoyable. -Transcoded from Matt's brain by Tapatalk- -- Hardware: 3x Touch, 1x Radio, 2x Receivers, 1 HP Microserver NAS with Debian+LMS 7.9.0 Music: ~1300 CDs, as 450 GB of 16/44k FLACs. No less than 3x 24/44k albums.. drmatt's Profile: http://forums.slimdevices.com/member.php?userid=59498 View this thread: http://forums.slimdevices.com/showthread.php?t=107946 ___ audiophiles mailing list audiophiles@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/audiophiles
