DBL/6x135/52.... where to upgrade?

Posted by: Ron Toolsie on 22 July 2003

This may be of some interest to a limited selection of people out there (attention Jun Keller).

As some of you already know I started off on the active route circa 1996 with the then top of the line CDS1/52/Snaxo/SC/6x135/DBL setup.Great power, insight and lots of fun to listen to. Not really the last word in absolute finesse and delicacy though. Indeed I found that my previous speakers (the wonderous Sonus Faber Extremas)had a certain gestalt and beauty in them that was not to be found in the active DBLs. And for a while the view was nice, being able to survey the surroundings from the kingdoms highest peak. Of course it doesnt take much to have the highest elevation in the Flat Earth World. This state of overconfidence did not last long as the CDS1 became the S2, the NAP500 was introduced, the 52 became bettered by not only the 552 but the 252, the NAP300 positioned itself between the 135 and the 500, the CDS3 took over the baton from the CDS2 etc etc. A couple of years ago I decided to have my CDS1 transmuted to the CDS2.

CDS1 to CDS2 In my opinion an upgrade that has no significant downsides. Everything the CDS1 did very well the CDS2 did even better, while most of the failings of the CDS1 (inablity to musically track complex recordings, subjectively peaky vocals, threadbare texture of bass notes and what can only be kindly referred to as quirkyness of track acess) seemed vastly better. It is true that the sum of the parts made the CDS2 seem very slightly 'dark' or rather less spotlit than the CDS1- a trait that some of the true believers decried was loss of pace. Not so I. For the very attractive CDS1-CDS2 innard upgrade that Naim offered, I was very pleased with the overall results, and never wished I had the CDS1 signature back.

Current conventional wisdom suggests that the next 'upgrade' would be to replace the 6x135/active with a single NAP500/passive x/o, but for people such as myself and Jun, we have so much vested in the extra black boxes we look for alternative pathways. And as I have already opined, the price of a single NAP500 is not really that much less than 3xNAP300, while the latter would still allow me to receive all of the benefits of an active crossover.

Now on to the next upgrades (in chronological order in which I auditioned them).

552/6x135 vs 52/6x135 I had the 552 in my system for only one long afteroon. If you recall my original post I declined the dealers offer to leave it there all weekend for fear that I would end up e-baying one of my kidneys. The 552s greatest strength over the 52 was what it did NOT do.... it lacked the now obvious colorations that the 52 imparts, sounding entirely seamless with more than a hint of round-earth qualities interdigitating with its wonderful flat earth ones. In a nutshell, it offered a very seductive sound, and one that seemed very tonally, rhythmically and spatially accurate. Eventually when the 52 had to be re-inserted I intellectually missed what the 552 was doing in the context of the 6x135/DBLs pairing, but I did not feel that the 52 was by anymeans unlistenable.

52/6x135 vs 52/1x300/4x135
Yes, I bought a NAP300 sight unseen, because I just knew that the venerable 135s had to be a bottleneck, or at least one of them. With the configuration of the Snaxo 3-6 (but not the current Snaxo 362) the amps for the LF and MF had to be identical and the NAP300 could only be inserted driving the tweeters- which was the recommended configuration anyway. The details of this upgrade can be found in a more expansive form in one of my earlier postings, but I have to say this was a very significant upgrade. It still almost astonishes me that having a better tweeter amp can subjectively improve the entirespectrum. There is no doubt that even the low bass notes became tighter, more rhythmic and with less overhang. Voices, brass instruments and percussion were just so much more credible. Yes folks, the NAP135s were a great amplifier in its day, but by current standards seem to turn the leading edge into a bleeding edge. And the irony is that fully 67% of the NAP135s were still resident in the active system- their most pervasive colorations seemed to be smitten by simply replacing a single pair of them at the most critical site- the tweeters.

So now my 'reference' system is the CDS2/XPS1/52/1x300/4x135 with the Snaxo/SC and DBLs being for now a non-variable. Into this system I did the next change.

XPS1 vs XPS2
Like the 552 did over the 52 (but to nowhere as large a degree) the XPS2 showed the XPS1 to be colored, somewhat pedestrian at the bottom end and to lack some space around (and within) notes. In addition it allowed slight variations in the envelope of the notes to become much more apparent-a facet that is not immediately obvious on a quick a/b comparison, but becomes very important with time.

So now, I'm up to the level of the CDS2/XPS2/52/1x300/4x135. I felt that the next thing to be replaced would be one more pair of the NAP135s. While I was toying with the idea of adding on another NAP300, I got the opportunity to snap up a slightly used NAP500. While this was on its way to me, I ordered one of the new generation Snaxo 362, as this will allow me to horizontally activate the DBLs with three different model number amplifiers (the 135s, the 300 and the 500), something that cannot be done with the older Snaxo3-6.

Anyway, yesterday the NAP500 shows up...but the Snaxo 362 is still intransit from NANA. So last night I could only try the NAP 500 on the tweeters, although my initial plans were to use the 500 on the bass units- my long term goal was to have 1x500 (bass units) and 2x300 (mids and tweets. And here we go..........

1x300/4x135 vs 1x500/4x135.
Read above and see all of the changes I have made. Take their magnitudes and then add them up. What you then have maybe roughly approximates the literally astonishing (aka jaw-dropping) experience that the 500 effects.

Dare I say this is a far, far larger improvement than the 552/6x135s were. In the same ways the 1x300 thrashed the 135s driving only the tweeters, the 500 triumphed over the 300, but to a way greater level. What I heard last night was a complete revelation. The entire frequency spectrum has again been rectified to one that is much lower in colorations. The top and middle spectra have a completely unforced and very life-like texture. A great wealth of detail is just basking the room...tiny little echoes, spurious noises in the background and waves and waves of glorious sound that just has me transfixed in sheer admiration. How many times have I made an upgrade so large, I just wanted to call up everybody I knew and tell them...'you just gotta come over NOW and hear this!'. Maybe two or three times, and folks- this is one of them. The DBLs low end has also taken on an unprecedented degree of tune- something I would have thought would have been the case had I used the 500 to drive the LF units. I can only shake my head in disbelief.

I have to seriously re-evaluated my initial plans. Based on the overwhelming superiority of the 500 over the 300 when driving only the tweeters it makes me wonder if a speaker passively driven with a 500 is better than the same speaker actively driven with any other amplifiers (maybe even including 3x300). Based on the initial results, I will almost not certainly remove the 500 from its tweeter duties. However tonight I will try out (with the Snaxo 362) the 500(bass) 135(mids) 300 (tweeters) against what I think will be the preferred pairings of 500 (tweets) 300 (mids) and 135 (bass).

My jaw has dropped.

Ron
Dum spiro audio
Dum audio vivo
Posted on: 04 August 2003 by Thomas K
I know that Nana has been promoting this as the most cost effective solution (1 X Nap500 and 2 X Nap300) to going active with the new series kit.

Hi Arthur,

Where do they suggest putting the 500 in that configuration? The tweets?

Thomas
Posted on: 04 August 2003 by Richard Paget
Ron
Very interesting post.
Have myself been mucking around at a much humbler level. But a similar principle reveals itself into SBL's
250/250 active is better than 135x2 (treble)with 250 (bass) (disjointed--less rhythm)and are in fact much worse than passive 135's. Mismatched active in comparison to passive has more impressive but more tiring dynamics and a touch more detail.Matched 4x135's active do win of course though by some way(saxo scap).
Mixing power amps is a very very bad idea IMHO(tried it b4 also with 110,140 and 160's) even if you can hear the intial 'wow' of having a 500 driving the trebles.
I'm personally v surprised 500+4x135's was an improvement on 6x135's in rhythm/music not just hifi--but I guess the 500 is so good even mismatched it's still pretty listenable.
The gain between Naim amps is quite similar but how they handle tonal colour,slam and forwardness vary greatly--you end with some very odd holes that kills that indescribable thing that makes you plan to listen to 1 track on a particular CD but end up listening till the cd ends.
I have course not done the swiss bank account type tests on this thread Wink but I think it would be highly likely 500+300+300 would be little better if not worse than a passive 500(it's not just the 135's which do 'rhythm' very very well-even the older slower ones)-- it's just incompatibilty (shame for Naim sales dept??)when it comes down to listening to track after track--rather than top 10 'greatest bass or slam tracks' hop we all do if we have a good hifi not a good music system(been there even with Naim when mismatched).
Regards Richard
Posted on: 04 August 2003 by Arthur Bye
Thomas K wrote:
quote:
Where do they suggest putting the 500 in that configuration? The tweets?



The two different people I know who did this put the 500 on the woofer.

I know that Ron's post clearly shows that it (the 500) is an improvement to the tweeters (over the 300.) I think what the 500 does for the bass is simply too much to ignore though. The 500 really does some great things with the bass.

I've tried my 500 on a pair of Kans and a set of ProAc 1SC's and what is most immediately noticeable is how much it extends the bass.

The disheartening (read: expensive) reality here though is that active 3 X Nap500 is the way to go in the end.

Arthur Bye
Posted on: 04 August 2003 by Minky
Ron,

I went from my beloved active 135's/SBL system to passive 135's/NBL's which was a lump with potential. With a 500 my new system overtook my old one but still ultimately lacked it's involvement and excitement. As Derek said, the 552 puts the active thing back and a whole lot more. Baring being taken at gunpoint to an undisclosed location and forced to listen to 552/active 500's whilst being spoon fed truffle omelets by naked nymphos I can't imagine ever feeling unhappy with my humble 552/500. It's hard to describe the impact of adding a 552 to a 500. You obviously have a finely tuned pair of lugholes; if you love music you won't need them. Just feel the force.

I dare you. Give it a try and then say it isn't so Smile
Posted on: 05 August 2003 by Derek Wright
I have just removed the demo 552 from my music centre and re installed the 52.

With the 52 compared to the 552, gone is the excitement, the detail the emotion the presence of whatever instruments wre playing on the CD. CDs that sounded ordinary via the 52 came alive when relayed via the 552.

Thinking back to my reaction to hearing a CDSii 52 3x500 DBL in 2000 and a CDSiii 552 1x500 DBL in 2003 at the Bristol Show, the demo with the 552 was more satisfying and left me a with a far better feeling than the demo with the active 500s. So Ron's findings do not really surprise me, the logical next step is to get the 552 back.

Derek

<<Have you checked your PTs today>>
Posted on: 05 August 2003 by Ron Toolsie
I had the 552 in my system when I was running 6x135s. How it managed to sound so splendid given the now-obvious dissonant colorations and vastly lower ablities of the 135s (as compared to the 500) is beyond me.It may be that the 'time aligned'filtering of the 552 allows a less provocative power-amp signal than does the 52.

One nice side-effect of reverting back to passive (for now.. ultimately I will be running the full brace of multiple power amps again) is that the Supercap that was feeding the Snaxo is now on the Prefix. Those of you who have heard the Prefix/SC combo know how very special it is.

I think my pathway up is quite clear. The 552 has just got to happen first. Then, and only then will I look towards adding another 500 to the mix and try running one 500 for each channel. I know that dogma suggests that since the 500 is a quasi dual-mono power amp anyway, this will have very little advantages, yet I know anectdotally of at least one person who is doing exactly this with some big B&W speakers and possibly one other with Shahinian speakers.

When NAP500 number three eventually is within my reach I will go active again. Given the chasm between the 300 and the 500 I am unconvinced that a hybrid active system with these amps would outperform a 500/passive system. By then I will have the ultimate 'Oblate Spheroid' sistem.... one that has the very best of both Flat and Round Earth properties.
By this time though there may be the NAP425 monoblock (w/outboard p/s) requiring a legendary twelve-pack to go active :-).

Ron
Dum spiro audio
Dum audio vivo


Posted on: 05 August 2003 by Chris Bell
Ron,

How is the CDS3 sounding? How is it different from the S2?


Chris Bell
Posted on: 05 August 2003 by Ron Toolsie
quote:
How is the CDS3 sounding? How is it different from the S2?


It is very different from the CDS2- much more so than the CDS2 was from the CDS1. When it appears to be fully burnt-in I will report on its sonic signature.

Ron
Dum spiro audio
Dum audio vivo


Posted on: 05 August 2003 by Bosh
Ron

How does the burn in go, is it linear improvement or peaks and troughs? Does it benefit from 24hour switch off during burn in as the CDS2 allegedly did? How long does it take?

Bosh
(4 days in to 552/CDS3 and counting)
Posted on: 06 August 2003 by Frank Abela
Ron,

I think your plan is the correct one. As with the 500, the 552 really does raise the game into a completely different league, but this is only really exploited when the other item is also at the same level. Strange to think that a 52 was limiting the situation two years ago, but even the 252 shows that this was so - and the 552 is in a completely different league to the 252! All the limitations against your hybrid active system should go when you add a 552 - even the compression.

Another benefit that you can take advantage of is that the SNAXO you are using is now 'old spec'. Selling it will get olive upgraders onto the active chain. When you decide to go active, you can avail yourself of the SNAXO 362 which reportedly brings many improvments of its own.

Incidentally, i spoke with Roy at the 500's launch about using two power supplies instead of one. IIRC, he told me that doing this would go against some of the theory he's used in the earthing of the amp, and this was why it wouldn't work as effectively as a single power supply, and this was borne out in lstening tests at Naim. Of course, at the launch of the 500 they still 'only' had the 52 as preamp.

Regards,
Frank.
All opinions are my own and do not reflect the opinion of any organisations I work for, except where this is stated explicitly.
Posted on: 09 August 2003 by headline
quote:
Originally posted by Ron Toolsie:
One nice side-effect of reverting back to passive (for now.. ultimately I will be running the full brace of multiple power amps again) is that the Supercap that was feeding the Snaxo is now on the Prefix. Those of you who have heard the Prefix/SC combo know how very special it is.

Ron
Dum spiro audio
Dum audio vivo





It's nice to be able to say "I couldn't agree more". I just wish I could run my Headline with a Supercap (-- it's on a Hicap at the moment and sounds wonderful, so how much better could it really be? With a Supercap there'd be no doubt about finding out (sorry -- poetry NOT intended!)).

Thanks and cheers..
Posted on: 09 August 2003 by headline
quote:
Originally posted by Frank Abela:
Ron,

I think your plan is the correct one. As with the 500, the 552 really does raise the game into a completely different league, but this is only really exploite d when the other item is also at the same level. Strange to think that a 52 was limiting the situation two years ago, but even the 252 shows that this was so - and the 552 is in a completely different league to the 252! All the limitations against your hy brid active system should go when you add a 552 - even the compression.

Regards,
Frank.
_All opinions are my own and do not reflect the opinion of any organisations I work for, except where this is stated explicitly._


Thank you everyone who's contributed to this excellent informative string. It's helped me sort out some strategies to discuss with the Naim dealer here towards the end of this month. From seriously considering beginning an upgrade by changing the pwr/amp. end of my active (yes, I won't go passive again) system, I'm now coming to the dealer's view that the 552/CD3 is the up-grade starting-point. They would be feeding into a Supercapped SNAXO/6 x 135's (purchased 1993) & DBL's.

My conundrum will then be (eventually) the pwr/amps. to which to upgrade. I can just imagine, 12 boxes (-- 6 x monoblock versions of the 500 & 6 x o/board. p/supplies! What a hoot!).

By the way, I've noted comments in this and other strings about the "latest" SNAXO236. Whether or not this would supersede mine (bought with the abovementioned 135's) I can confidently say a SNAXO should never be powered by anything below Supercap standard (-- believe me, I've tried it and I just know the difference the S/cap. makes!).

And finally for now, my kit includes a NAT 01 I bought ~ 10 yrs. ago that's connected to a really top antenna system. When our "national broadcaster" (FM of course) is "on song" it's just sensational listening! Anything new being planned for radio @ NAIM, esp. DAB?

Thanks and cheers again.....

[This message was edited by headline on SATURDAY 09 August 2003 at 16:19.]]

[This message was edited by headline on SATURDAY 09 August 2003 at 16:23.]
Posted on: 10 August 2003 by jpk73
Hi!


I am at home just for one day from my 6-weeks summer work in Salzburg. I must say that I really missed my system! When I listened today I felt that I basically should forget all about upgrading etc, there are just a couple of things. Fraim, S-Burndys and maybe the passive 500. Oh, yes: and the TT thing! I still don't know what to do...

But what I really would like to hear about is the demo active 300s vs passive 500!

- Jun
Posted on: 20 August 2003 by Tuan
quote:
Originally posted by Tuan:
quote:
Originally posted by Richard Dane:
Hi Tuan,

I had a suspicion you might ask just such a thing Wink. Yes, as far as I'm aware you can use 2x300PS on a single NAP300. Due to the many similarities shared between the 300 & 500 I would suspect the outcome would also be similar to what I've already described above. I haven't tried it myself so I'll keep an open mind until I get a chance to do so...

Richard


Thank you Richard.

Please do the test and let me know the result. This way the NAP300 will have more transient power. I am seriously thinking of buying it and the next pair of speakers will be a "really kick-ass" model. I will call you a week from now and ask for the result. Tuan.


Richard...

I am glad that you are well and still alive (laugh). have you tried to hook up 2 power supplies to the NAP300? and what is your assessment on this? Please let us (forum members) know your finding. Tuan.
Posted on: 20 August 2003 by hi fi fo fum
Tuan ,no more power supplies till you get the grid to full power or shall I say "MAX POWER" no more playing, look what happened to the eastern cost of North America the last time you played with too many Naim power supplies"
Hey all you have to do is run the A/C line from the plant and hard wire your NAP250 and then push the controle rods to the MAX,( Power)!!!
Steve.
Posted on: 21 August 2003 by Richard Dane
Tuan,

I will post my findings as soon as I have done the test. Hopefully I should find some time over the next few weeks.....

Richard
Posted on: 21 August 2003 by Dev B
quote:
Originally posted by Richard Dane:
Tuan,

I will post my findings as soon as I have done the test. Hopefully I should find some time over the next few weeks.....

Richard


Dear Richard,

Please ensure that such a test is done with a multiple hydra system using a complete non ferrous environment. Sonically damaging items such as carpet grippers, watches and earrings shoudl be removed from the test.

Thank you & I look forward to your findings,
Posted on: 21 August 2003 by Evan D. Jay
[/QUOTE]

The two different people I know who did this put the 500 on the woofer.

I know that Ron's post clearly shows that it (the 500) is an improvement to the tweeters (over the 300.) I think what the 500 does for the bass is simply too much to ignore though. The 500 really does some great things with the bass.

I've tried my 500 on a pair of Kans and a set of ProAc 1SC's and what is most immediately noticeable is how much it extends the bass.

The disheartening (read: expensive) reality here though is that active 3 X Nap500 is the way to go in the end.

Arthur Bye[/QUOTE]

I believe I am one of the individuals that Arthur is speaking about. I had my 500 on the bass and 2 x 300s on the mids and highs. Last week, I moved the 500 to the highs and was immediately struck by how much better they became with the 500. Unfortunately, the bass suffered in a proportional amount. I haven't done too much listening since, but wonder if the system almost seems a bit unbalanced now with the 500 on the highs. As Arthur stated,
3 x 500s is the way to go in the end. The 500 is really that much better than the 300.
Posted on: 22 August 2003 by Richard Dane
Tuan,

Jason was here yesterday and set up 2 300PS units powering a single NAP300.

The results were fascinating but completely in line with our previous experience with the same configuration of using 2 500PS units on a single NAP500.

The most striking change was the increase in apparent air and space. I say apparent as it seemed somewhat contrived and unnatural. The most serious downside was that the music just didn't gel anymore. It was impressive in a hifi kind of way but instruments no longer seemed to play in time with one another.

Returning to standard configuration was a relief, everything snapping into focus once more and rhythms once more making sense.

Biggest surprise for me was that the difference was not subtle.

Richard
Posted on: 22 August 2003 by Tuan
quote:
Originally posted by Richard Dane:
Tuan,

Jason was here yesterday and set up 2 300PS units powering a single NAP300.

The most striking change was the increase in apparent air and space. I say apparent as it seemed somewhat contrived and unnatural. The most serious downside was that the music just didn't gel anymore..... the difference was not subtle.

Richard


Could you guys explain why... and thank you very much.