"What a refreshingly honest blog about listening to music through hi-fi. So happy to see views based upon the enjoyment of music rather than so-called sound 'quality'." - Peter Comeau, Director of Acoustic Design at Mission / Wharfedale
Showing posts with label PS Audio. Show all posts
Showing posts with label PS Audio. Show all posts

Thursday, 16 October 2014

Power Pictures by PS Audio

The main system has been powered through a PS Audio P5 mains regenerator for about 3 months now.  Essentially this takes the incoming AC mains, transforms this to DC, then re-generates an AC output.  Inside there seem to be a good few chunky components such as transformers, amplifier looking transistors and capacitors in addition to the cooling fans.

Along the way, the voltage is stablised to whatever level you choose to set and distortion of the AC sinewave is drastically reduced.  In the shop at Manchester, incoming distortion is around 2 to 2.5%.  Here at home it seems to be more in the 1.5 to 1.9% range.  Initially the higher distortion was seen during the day, but since the solar panels were installed and on brighter days, daytime incoming distortion seems to be very similar to evenings.  Output distortion tends to around the 0.1%, so a major reduction.

In terms of effect on the system, well, I don't think it has any effect on the emotional capabilities of the system but it does improve some of the more "hifi" aspects.  There's a definite improvement in imaging stability - vagueness about where an instrument might be is reduced, and it stays there.  Also, everything seems to be "freed up" from the speakers - a wider, more open soundstage across the room and front to back too.  There may be a touch more fine detail too, as a result (I presume) of a reduction of background noise.  But its the imaging and soundstage that makes the biggest impact.

The device has a front panel display that shows information about incomings and outgoings.

All outputs switched off

Just the streamer powered up

Running at volume level 55 for streamer, pre-amp and power amps


Its also possible to monitor through a web interface:

Full online screenshot showing labelling of the output sockets.  System is on but idle here and is only consuming 105W
These screenshots below are taken over a fairly short time period - around 15 minutes.  You can see the incoming voltage drift from 245.1V through to 246.7V which is fairly small, but I have seen as little as 235V and as high as 259V in the past.  You can see the incoming distortion is around 1.5 to 1.6% and consistent at 0.1% with output voltage varying by 0.2V.

Volume level 30 shows an additional 30W or so of consumption

Volume level 50 doesn't use much more power


Volume level 60 (the sort of volume I usually use when doing "proper" listening)
And a picture of the new day time power source:


Thanks to brianandtrevors.com for introducing me to this product.

Wednesday, 6 November 2013

First UK Dealer Exakt Demo

See below about the date and location of the first dealer Exakt demo evening:

http://audiophilemusings.blogspot.co.uk/2013/10/house-of-linn-demo-of-exakt-will-there.html

And here's the report on activities.  How exact is Exakt?  I deliberately didn't comment on the sound of Exakt heard at the 40th Anniversary event at the factory as the conditions just weren't suitable to make a sensible evaluation.  Tonight's event wasn't perfect as most of us won't be listening to a system with 18 other people, but it was much more realistic than the factory event, and later in the evening when the room emptied out, even better conditions were experienced.

As usual, Brian and Trevor were excellent hosts - drinks (including an excellent Malbec from Morissons, a bottle was seen in the hands of one Managing Director on his way out at the end of the evening...) and snacks made available and a relaxed atmosphere as the gathering built momentum from about 19:45 onwards.  For those who don't know House of Linn, it is just that - a very large substantially built end terrace house.  So the rooms are much more "domestic" than most dealers, including the kitchen / diner at the back of the house where we gathered - in the case of HoL the party starts in the kitchen, but usually ends with ears glued to the music in the large listening room at the ground floor front of the house.

Gilad Tiefenbrun, Susan and Andy represented Linn this time around and they were running the first dealer version of the Exakt demo for the UK, being an evolution of some demos done during the 40th Anniversary weekend at the factory.

Gilad kicked off the evening with about 18 customers in attendance (many happily making the best of the Malbec) explaining the basics of the Exakt technology (see here: http://audiophilemusings.blogspot.co.uk/2013/09/more-exakt-info.html  and here: http://audiophilemusings.blogspot.co.uk/2013/09/exakt-photos.html  for the salient points) and introducing some nicely produced animated videos to help with the explanation.  If anyone was still confused about what the technology is, the Q&A session didn't reveal any fundamental mis-understandings.

Andy from Linn (standing) and Gilad Tiefenbrun (sitting) and Some Abstract Art (hanging). Note the Dark Wood  Non-Exakt 350a Speakers in Place At This Point
 
Disclaimer:  I'm not the biggest fan of Linn's 350 speakers.  So please bear that in mind here - I prefer the Akubariks and Komris.  Having heard 350s in a number of different system configs and locations, I've never really got on with them.  However, its also worth saying that they sound much better at HoL than the did in the Linn Home dem rooms at the factory...  I mention this as I won't be able to say that what I heard was the best system I've ever heard (which I would expect Linn to be hoping customers to be saying), as there are compromises with these speakers that don't suit me, whereas the compromises in the Akubariks (for example) are easier for me to put to one side given how well they do pretty much everything else - particularly their ability to be difficult to listen to as a hifi component, because there's just so much music to listen to.  Anyway, I digress - so back to the 350 speakers used tonight - I'll not describe what I heard in absolute terms (other than setting a baseline from the non-Exakt system), but just in terms of the way they changed as the demos progressed.  Hope that makes some sense - trying to evaluate the effect of Exakt, rather than the basics of the system.   As usual, these notes are only my opinion and thoughts, based on the experience of the evening - its not definitive!

With the system feeding from PS Audio power re-generation products all evening, Andy then stepped us through the demo process as follows:

Starting System: KDSM, maxed out Klimax LP12, 350a in "tune-dem" determined position
2 x 30-45 seconds of track 1 - 24 bit FLAC
2 x 30-45 seconds of track 2 - vinyl

Audiophile Musings thoughts: the usual sound here - very tuneful, bags of detail in the treble and mid, sparkling smooth top end, something not quite right about imaging and the integration of the upper mid and lower mid drivers (exhibited, for me, as the vocals being clear, but strangely recessed in the mix, but moving forward and back in the mix, depending on the singer and even which part of the tune is being sung) and deep, powerful, but somewhat (struggling for the right phrase here) less than detailed bass.  I know this is not the KDSM electronics as it sounds great with other speakers in the Linn range.  So a very good sound, but not the ultimate sound, for me at least - but remember this is in context of a very expensive system - I suppose I just expect a bit more at this level of spend, but in terms of the complete hifi spectrum, this is still a very good sounding system.


Changed system to: KEDSM, maxed out Klimax LP12, Exakt 350 in the same location as the 350a - room optimization settings off, speaker position optimzation settings off
2 x 30-45 seconds of track 1 - 24 bit FLAC
2 x 30-45 seconds of track 2 - vinyl

Discussion on the differences
Audiophile Musings thoughts:  The tune is just as easy, if not easier to follow.  Timing of the bass lines improves dramatically, snapping into line with the rest of the music.  Instruments much more separated, much more stability in the vocals in terms of front to back in the mix and in terms of left to right image stability.  350s much easier to listen to.  Generally the room agrees it can here a significant difference but not all are fully convinced that everything is unequivocally better.  There is no disagreement about the effects being just as dramatic on vinyl as it is on the digital source.


Changed system back to KDSM, maxed out Klimax LP12, 350a in "tune-dem" determined position
1 x 30-45 seconds of track 1 - 24 bit FLAC
1 x 30-45 seconds of track 2 - vinyl

Discussion on the differences
Audiophile Musings thoughts: Going backwards in the upgrade path for me is usually easier to hear than an upgrade.  And so it proves here.  In the upgrade, what I've described above as much greater separation of instruments, in the step back, is much more discernible muddling (remember, this is all relative and the system is still very good in absolute terms - I think the reference point has been moved by Exakt, up a couple of steps on the ladder).  The vocals are much easier to identify as changing position over the pitch range to the point where its now clear that they are wandering around quite distinctly.  That lack of detail in the bass is back too.


2 x 30-45 seconds of track 3 - 24 bit FLAC
2 x 30-45 seconds of track 4 - vinyl

Changed system back to: KEDSM, maxed out Klimax LP12, Exakt 350 in the same location as the 350a - room optimization settings off, speaker position optimization settings off

1 x 30-45 seconds of track 3 - 24 bit FLAC
1 x 30-45 seconds of track 4 - vinyl

Discussion on the differences
Audiophile Musings thoughts: unsuprisingly all the Exakt changes are back.

Changed system to: KEDSM, maxed out Klimax LP12, Exakt 350 in the same location as the 350a - with room optimization settings on (determined earlier in the day), speaker position optimization settings off

1 x 30-45 seconds of track 3 - 24 bit FLAC
1 x 30-45 seconds of track 4 - vinyl

Discussion on the differences
Audiophile Musings thoughts: Bass much more tuneful.  At first it sounded less extended, but this is often the effect heard when bass is brought under greater control.  This also freed up the mid-range somewhat to let vocals be rock solid in the image now, and to really breath freely and flow in a very natural and fluid way.  Given that this software works based on the physical measurements of the room, I found the effect more profound than expected.  Was it a complete success?  May be not - I thought the music lost a touch of liveliness or impact, so its a different set of compromises.  On balance on the evidence of the evening, I preferred the music with the optimisation on, but I think its something that would have to go through a more thorough comparison in your own home to be absolutely sure.

Changed system to: KEDSM, maxed out Klimax LP12, Exakt 350 moved back into either side of the large bay window - with room optimization settings on, speaker position optimization settings off

1 x 30-45 seconds of track 3 - 24 bit FLAC
1 x 30-45 seconds of track 4 - vinyl

Discussion on the differences
Audiophile Musings thoughts:  Disastrously bad positioning of the speakers in this room.  Image collapsed and the tune was dragging its feet through mud.  A clearer demonstration of the benefits of placing speakers in the correct place in a room as I've ever heard.  And its amazing how you can pick this out in the first 3 or 4 bars of a very simply constructed acoustic track such as Emily Barker.   The idea here is that the speaker placement optimisation software is supposed to allow for a more "domestically acceptable" positioning of speakers, but only when the ideal position is not tenable.  To configure the speaker optimisation software, first the dealer will identify the best place for the speakers in the room using "tune dem" and record the measurements (from back and side walls), then tell the software the domestically acceptable position in the room and the optimisation is then applied to the signal by the Exakt engine in each speaker.  Interestingly, the distance to the side walls became the distance to the edges of the bay window, not to the edge of the room.

Changed system to: KEDSM, maxed out Klimax LP12, Exakt 350 moved back into either side of the large bay window - with room optimization settings on, speaker position optimization settings on (determined earlier in the day)

1 x 30-45 seconds of track 3 - 24 bit FLAC
1 x 30-45 seconds of track 4 - vinyl

Discussion on the differences
Audiophile Musings thoughts: The tune comes back, imaging somewhat improved, but its not a complete success - having the speakers in the correct position in the room is still clearly better.  But its an impressive result.  If 350s are too big for the room and you would need to apply speaker position optimisation, I think it would be worth trying some smaller speakers in the correct room position before making a decision.


Throughout, the TV in the room displayed the configuration in use and the track being played, to help us remember what was going on!  Also worth noting is that the speakers not in use were wheeled out of the room, so Brian and Trevor had a good deal of (heavy) box shifting to do through the evening.  So particular thanks to them for the hard work on this.

Brian Installing the Exakt 350 (again!) in Oak Finish

A Q&A session followed with Gilad which covered a number of topics.
Will there be an Akurate Exakt DSM? Nothing definite yet, but probably.
Will there be a Majik Exakt DSM?  Highly unlikely.
Will there be an Akurate Exakt Tunebox - probably and like the Klimax Exakt Tunebox it will eventually cover most, if not all, of Linn's current and previous speakers.
Including the Keilidh?  Yes, as there are around 27k Keilidhs out there, it would seem to make sense to do so, but it might not be an economically sensible way to spend a system upgrade budget, particularly with the Klimax Exakt Tunebox.
Akubarik the next to have an Exakt module?  Very likely, given that it was developed in parallel with Exakt and it has the ideal amp module format. As an aside, Gilad shared that there is no such thing as an "Aktiv Akubarik".  There is only "Akubarik" and "Akubarik Passive" as Linn now see active as the norm at Akurate and above, not the exception.
Will there be Exakt modules for the rear of Majik speakers and older Akurates such as the 242?  No, Exakt Tunebox will be the approach for these - the speaker cabinets are not designed for a built-in or built-on module.
Gilad confirmed that the Klimax (and Akurate, should there be one) Tunebox will be the same for all Linn speakers, with only the software for the digital crossovers being different for each speaker model - these will be downloadable from "the cloud" as the Internet seems to be referred to these days.
Confirmation that Exakt Tunebox and the relevant settings for Komri and Keltik will be next and soon.
Will there be a Urika Exakt version?  Unlikely.
Which is Linn's top system - is it KEDSM and Exakt 350a, or is it KEDSM, Exakt Tunebox, lots of Solos and 350p?  Gilad's answer was very revealling of Linn's thinking - they're both seen as the Linn reference system.  With KEDSM and Exakt 350 being the reference simple solution and the KEDSM / Tunebox / Solos / 350p being the reference enthusiast system.  They meet different demands and exhibit different compromises so are different references. So Audiophile Musing's take on this is that there is a "tidy reference" and a "geek reference".
Questions about pricing - no change here.  KEDSM with Exakt 350 is £50k.  KEDSM and Exakt upgrade for 350a / 350p / Artikulat priced at £25k (in this case you retain your KDS or KDSM to re-use elsewhere or sell on.
Will the optimisation software improve over time?  Yes, as more and more data is collected from installations, then the algorithms will be amended to improve the capability of the optimisation software - and these will be downloadable to be applied to their systems.

We then went back to KEDSM, maxed out Klimax LP12 (interestingly, not used for the rest of the evening), Exakt 350 in the same location as the 350a - with room optimization settings on (determined earlier in the day), speaker position optimization settings off and some really great tracks (I have to say this, they were from my own playlist!) were enjoyed as folks came and went - music in the demo room, chatter in the kitchen.  As usual, I came away with an introduction to some new music that I'll be buying.  In this instance it was Rachelle Ferrell's Individuality album.  Give it a try on Spotify - particularly the track "Sista".  Incredible voice.  Stayed until after midnight, just to be sure I'd given the system a good listen in a quiet room and with some very familiar music.  Overall the system at the end of the evening (I wasn't on the Malbec by the way, so I hadn't mellowed through the evening!) was significantly better in pure hifi terms and in sheer musicality - but my prejudices about the 350 remain - I just don't get lost in the music the way some systems can take me. 

Came away with a positive impression of Exakt - can't wait to hear KEDSM / Exakt Akubarik!  Best start saving, or buy a lottery ticket.  Probably both.

Thursday, 18 July 2013

How Good Can It Be?

I've now had my current system config for about 12 months, and we seem to be getting on well together.  I feel as though the upgraditis of the previous 18 months was worth all the box shuffling and uncertaintity has paid off.  In that time I've also made a few friends along the way through the forums, at House of Linn and with some local audiophiliacs.  Good stuff.  Music has not been so addictive before and I truly relish and look forward to the few hours I can find each week to sit down and get immersed into the music and play "just one more track".

So, lots of self-contratulations there - perhaps I should get into the theatre and the award ceremony merry-go-round.  Perhaps not.

So this means all is good and no further upgrades are required, right?  Yes.  For now.  But I work in a strategy role, and that occasionally kind of spills over into non-work time.  Plus, any significant changes are going to take equally significant chunks of cash.  So a plan needs to be worked on so next steps can be planned out and funds saved over time.  If you don't know where you're going its difficult to know which way to go, how long its going to take to get there: you might end up in the wrong place and get lost along the way.

Way back, when I'd decided that the Marantz CD40 wasn't the best CD player out there (this kind of decision is usually linked to availability of cash), I could've taken a number of steps over time and worked my way up the CD player hierarchy.  But I chose not too - deciding to save over a period of time and go straight to where I thought I wanted to get to - the Meridian 508.  Perhaps that also saved some cash due to less depreciation steps along the way. And maybe that's what I should think about now.  Indeed, the 508.20 worked well for me and actually did end up being my last serious CD player, so the wait was worthwhile and I didn't hear anything in the 10 years it was in my system that convinced me there was a need to move on.  Plus, it sold for a reasonable price and, along with letting the LP12 go to a new home, gave me the opportunity to go into streaming at a reasonable high level of quality.

So does that mean it'll be straight to the top with Klimax DS, Klimax Kontrol, lots of Klimax Solos and a pair of 350s in active config then?  Errr, no, not really.  The end game doesn't need to be the ultimate possible, but a balance of what's best within a budget and a time frame.  If you aim too high, there's a very real possibility that you'll never get there.  And I've heard the 350s, and I don't think they're as good as the Komris they replaced.  Timing can also allow for the secondhand market and when the products currently available might reach a more acceptable price point.

So there's the usual bit of pre-amble and positioning stuff out of the way, now lets get down to the content of this post.  And its more on the Akubariks.

House of Linn ran an Akubarik open couple of days recently, so having booked into an evening session, I took local Roksan owning neighbour Chris along to listen and get a second opinion.  In typical HoL style we were welcomed with cups of tea / coffee, a bit of a chat and introduction to Chris before moving into the front listening room where we found a pair of Oak active Akubariks, Klimax DS/1 and Klimax Kontrol all hooked up and ready to go, powered by PS Audio mains regenerators.  HoL know that the LP12 doesn't interest me these days, so vinyl was off the menu.  We loaded up my list of demo tracks (see here for clues) and got stuck into listening to some music.  The demo tracks are chosen for the following reasons, in order of priority: emotionally involving; excellent songwriting and/or musicianship; excellent recording quality; something that would test at least one aspect of what a system can do, such as bass depth, slam, delicacy of the treble, female vocals, imaging etc. etc.

If you've read the post below, you'll know that I found it difficult to concentrate on the sound being produced last time I heard the Akubariks - as hard as I was trying, I kept getting distracted by the music and forgot about the sound quality.  Well, as we were using music I'm very familiar with this time, perhaps it was a touch easier to focus on the system, yet still I struggled to find a flavour, or character for this system.  For sure, the bass goes deep - deeper than the Majik 140s - but there's something there that just doesn't happen with the 140s, Majik Isos, 242s, 350p, 350a and many other non-Linn speakers such as those from Wilson Benesch, Kudos, Vienna Acoustics and many others on which I've listened to the same tracks.  And that's the tune.  There is so much more tune going on in the bass that I've not heard on any other system before.  I know some systems can differentiate bass notes better than others, and can remove some of apparent monotonic bass lines presented by other systems (such as moving from Linn Keilidhs to Majik 140), but this combination of components really plays a tune in the bass - its quite a remarkable revelation and one I encourage you to seek out.  I found myself wrapped up in following this aspect of the music - to the point where I was smiling involuntarily at the revelation.  Marvellous.

Elsewhere, the 3K array seems to integrate very well with the lower mid-range driver - in other Linn designs with the 3K array it's often discernable where this unit finishes and the lower frequency drivers take over - if there is a problem with that in the Akubarik, I need better ears to detect it.  There's been a change to the phasing of the crossovers for the 3K array itsself and, as noted in the earlier report below, this seems to have driven out a step change in the ability of a Linn speaker to image properly.  L to R, front to back and up & down, this system images extremely well - little to no vagueness, realistic instrument sizing (where the recording allows of course) and rock solid in the soundstage (but see the next posting above about other observations on this particular aspect).  I expect that the tuning of the crossover to match the actual drive units installed in each speaker (to the point that the crossovers in a pair of speakers may be very slightly different between left and right speakers) to eliminate any differences that manufacturing tolerances may have introduced could well be a contributor to this new found imaging performance.  The other characteristics of the array remain intact - such as the very clear highest frequencies with no edginess - good news.

And that's about all I can say about this system (I know this is primarily about the active Akubariks as they are the new bit here, but they can't perform unless they're given a good signal).  Acoustic music, bass heavy electronica, happy dance music, female vocals covering depressing scenarios, all came across with heaps of emotion, extensive detail, rock solid imaging and lots and lots of tune laden attitude.

You might've detected that I'm a fan.  I've heard systems that can do that last nth level of deeper bass, I've heard those that can perhaps slam a touch harder, I've heard systems that cost twice as much and were abysmal and I've heard Linn's current top of the range speaker system.  All of them have compromises that tend to outweigh the benefits of that little thing they do just that little bit better. You can read about many of those experiences elsewhere in the blog, but for me, this is the most tuneful, enjoyable, uncompromised system I've heard to date.

I think I see some clarity of direction emerging.

Thanks to B & T at HoL for hosting and Chris for looking a bit gobsmacked (by the music and the list prices!).