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Hergest

Pure Audio Vinyl Phono Preamp

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I've got a Pure Audio Vinyl phono pre amplifier on audition at the moment and thought i would put up a post as there's not a lot of information out there about this New Zealand preamp.

 

I've been after a good phono stage for a 2nd system for a fair while now, calling it a second system doesn't do it justice as i listen to it as much as the main set up but is for the evenings and days when my wife wants the lounge. I've always scrimped on phono amps for this second set up which has been a mistake as there always seems to be something amiss and the rest of the gear in it is rather good. I owned a Plinius M14 for 10 years and sold it a year or so ago when i put a superb Phase Tech EA3-II in the main hifi so i was interested in how the Pure Audio sounded as it is made by the same bloke that did the Plinius.

 

Of course i've taken a few photos along the way :)

 

It's an interesting looking bit of kit, different from the norm and of a high build quality. Straight on is fairly plain, the white LED being a welcome change from blinding blue LEDs that seem de rigeur at the moment. The light goes out when it senses music which at first i thought a bit of a w.ank but got used to it and now don't take any notice after a day or two. One thing to note though is that Pure Audio's line pre amp uses a sensor to switch to the input being used rather than you setting it manually. If the sensor is the same as to turn off the LED then it would infuriate no end as it goes off a second or two into music but if you listen to anything with sound effects such as wind or rain or footsteps before the music kicks in it doesn't pick this up and stays lit so you would miss a lot with the line stage. (I imagine it's a different design though and the sensor in the phono pre only does the LED, sounds plays continuously)

 

 

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I'd seen photos of it but didn't realise how textured the finish is. I like the look and feel of it.

 

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Sensibly laid out rear end.

 

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Loading switches are easy to use with a toothpick or picnic sticks, 1 set for each channel as this is all dual mono. The standard options are 47, 100, 220, 470 and 1000 ohms. I assume that using no dip switches is 47K, this isn't mentioned in the specifications.

 

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The top and sides are the interesting part of the design with a lightweight mesh covering the internals. The unit gets a touch warm after a day or so but nothing more.

 

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It's surprisingly long though as you can see by comparing it to the big Marantz amp. With meaty interconnects and stiff cables adding some inches onto the rear it might be a squeeze in a tight spot.

 

pureaudio5_zpsc2827a55.jpg

 

I asked my wife about the WAF (after i'd explained the concept) and she said that she wouldn't want to see it on display. She likes the Marantz amp and my Vienna Acoustic Beethoven speakers but this is "too mechanical" for her tastes. The front on display in the rack is fine.

 

The most important thing of course is the sonics. I am comparing it to my Phase Tech and my memory of the Plinius M14. The Phase Tech is warm and inviting with a seductive mid range and sweet top end that keeps you in your listening chair all day. The Plinius i remember at presenting a really hefty grip to the bass that was always tuneful and never had that horrible thump that bass can be. My memories of the mid and top end are less sure, i don't remember anything amiss but i did enjoy it and kept it for 10 years.

 

I was expecting a lot from the Pure Audio but when i first played an album it was without doubt a "pfft" Flat and dull and ordinary. I was being very unfair as it was stone cold. The Phase Tech when cold though still manages to seduce so i was disappointed with my initial listen. Deciding to be fair i put an lp on and did some work around the house while the music played in the background. After 3 or 4 lps i found myself pricking up my ears when i would hear the prolonged sustain of a guitar note or the breath of a singer before they sang. Once i'd finished the work around the house i sat down to take a close listen and the difference when just a bit warm was profound. There was nothing that leapt out as in being full bodied or having a shimmering treble or pronounced soundstage or anything of that sort but i could pick out bass runs if i chose to or follow individual notes in a guitar solo or feel the warble in a singer's vocal chords with ease. Or i could just listen to the music.

 

Now after 3 days it's as if there is no phono pre amp, just music. I'm reminded of when i bought my first Ortofon Jubilee cartridge 12 years or so ago, compared to other cartridges i'd owned it just disappeared and all there was was music. That's what i hear now. The problem i see for Pure Audio though is that on a quick comparison there is nothing to leap out and grab the listener's attention at first so it might be overlooked. A decent audition at home is a must. I've got it connected up to an SME Model 10 turntable with Ortofon Cadenza Black cartridge loaded at 470 ohms and the music coming out of my speakers is sublime regardless of genre or quality of production. It might seem odd being impressed with a $3000 + bit of kit that disappears from the scene but the music is what matters and i am impressed. The LED extinguishing makes perfect sense, a James Bond type of invisibility cloak would not be out of place as that's what the Pure Audio invokes.

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Great write up Hergest and some nice pix as well.  Thanks for sharing and sounds like you are really enjoying the new addition. 

 

Have you tried it in your other setup yet? 

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Great write up Hergest and some nice pix as well.  Thanks for sharing and sounds like you are really enjoying the new addition. 

 

Have you tried it in your other setup yet? 

 

Thanks.

I only put it in the other system briefly and will probably try again now it's nice and warmed up. The other lot runs a Phase Tech cartridge though which is a wonderful match with the Phase Tech pre so i reckon i will leave that as it is. Also i don't want to get a dilemma where i can't decide what room to put what in. Hard choices eh?  :)

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I think you said, Hergest, the 'R' loading choices included 1K ... then 47K?  So what about carts like my Benz LP which likes 2K2?

 

Pathetic, IMO, having such a limited choice.  Don't use a dipswitch and do use a parallel pair of RCAs, so you can plug in whatever 'loaded' plug you like.

 

Regards,

 

Andy

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Andy

 

Please tell me of any phono stage that has loading between 1k and 47k?   Not yours  :P

 

Not much difference between 1k and 47k sound wise IMO.

 

Benz has internal impedance of 38 ohms, so loading should be around 400-500 ohm using the 10x rule.  2k??  Why not just load it at 47k?

 

The Benz lp-s I was using the past 2 months sounded best at 500 ohms in my system.

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I think you said, Hergest, the 'R' loading choices included 1K ... then 47K?  So what about carts like my Benz LP which likes 2K2?

 

Pathetic, IMO, having such a limited choice.  Don't use a dipswitch and do use a parallel pair of RCAs, so you can plug in whatever 'loaded' plug you like.

 

Regards,

 

Andy

Andy, the music coming through the Pure Audio sounds sublime , that's perfect for me. You might think it's pathetic but that's up to you.The Pure Audio clearly isn't for you as your time seems to be taken up fretting about what motor controller to use on your butchered Linn so i reckon you should concentrate on that.  Don't sweat it mate.

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Andy

 

Please tell me of any phono stage that has loading between 1k and 47k?   Not yours  :P

 

Not much difference between 1k and 47k sound wise IMO.

 

Benz has internal impedance of 38 ohms, so loading should be around 400-500 ohm using the 10x rule.  2k??  Why not just load it at 47k?

 

The Benz lp-s I was using the past 2 months sounded best at 500 ohms in my system.

 

The JLTi has a loading between 10 and 47K ohms.  It does this by having a parallel pair of input RCAs - so you can plug in whatever load you like. ;)  So does the Bugle2 and Cornet2 that I modified for djb ... and all 3 of my own phono stages. :D

 

The 10x rule is just a 'rule of thumb' - the same rule of thumb which suggests that the Zin of a preamp, say, should be at least 10x the Zout of the preceeding phono stage (which rules out using some tube phono stages with some preamps).

 

"In your system" is the important thing; the optimum loading is often different with different phono stages.  I've tried 470ohms with my Benz LP (not 'S') and I've tried 47K (which Mr Lucaschek recommends).  Bass is too floppy at 47K, with my phono stage - I prefer the sound at 2K2.

 

 

Regards,

 

Andy

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Andy, the music coming through the Pure Audio sounds sublime , that's perfect for me. You might think it's pathetic but that's up to you.The Pure Audio clearly isn't for you as your time seems to be taken up fretting about what motor controller to use on your butchered Linn so i reckon you should concentrate on that.

 

Haha ... you can run but you can't hide, on the Internet! :lol:

 

I'm sure the Pure Audio does sound great - it's just a shame IMO that it doesn't offer more flexibility.

 

 

Regards,

 

Andy

 

PS:  A pity you are in NSW ... otherwise you could've come round and listened to my "butchered Linn".  You would remove that curl from your top lip, after hearing it. ;)

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Haha ... you can run but you can't hide, on the Internet! :lol:

 

I'm sure the Pure Audio does sound great - it's just a shame IMO that it doesn't offer more flexibility.

 

 

Regards,

 

Andy

 

PS:  A pity you are in NSW ... otherwise you could've come round and listened to my "butchered Linn".  You would remove that curl from your top lip, after hearing it. ;)

 

Ha. You should post with different monikers so i wouldn't be able to track you down.  :)

 

A good mate of mine had a Joe Rassmussen FVP for years which is a wonderful pre amp, that used loading plugs for the phono stage. He replaced that with a stunning Vacuum State pre last year and of course that does the same. Over many years the 2 of us have played around with different loading plugs and apart from the wild differences between say 10 ohms and 47k there has rarely been any difference and the farting about at the back of the pre amp plugging and unplugging loading plugs has actually made me shy away from owning something that needed to be done that way. Also, although my mate is handy with a soldering iron i've seen some shockers over the years of bodgy resistors with lumps os piss poor solder holding them in. I'm no good at soldering so it would mean having to buy something that i neither want or would even use once i've decided on the loading. Using the dipswitch and having a sensible amount of choices is to me a perfect way of doing things. I had a play around once it was nice and warm and as always the 470 ohms suits the Ortofon in my system. I shall never touch it again. I'm sure there are people who can hear 470 ohms and 520 but i'm not one of them. Set and forget suits me fine.

 

That curl on my lip will never go. I have an aversion to things engineered by professionals that are "improved" by a bloke with a hammer and screwdriver. Whether it's someone messing about with a turntable or someone buying a new car and stiffening the springs and enlarging the wheels and chipping the engine to "improve" things i instinctively am not impressed. 

Edited by Hergest

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