Naim Nait 5i / Rega RS1 - speaker upgrade: analysis paralysis

Posted by: Jeb-Jeb on 15 April 2016

Hi All, 

It's been a while.  For the last year or so I've been enjoying my first "real" system:

Nait 5i-2 / Rega DAC / Rega RS1s / BK XLS-200 sub

Room is 

It's brought me a good deal of listening pleasure but in all honesty I have never fully warmed to the Rega RS1 speakers, although they seem good value for money & work okay mounted on the wall, which was important at the time.  I find there's a bit of glare and upper-mid/treble roughness and a lack of substance or solidity to the sound.  A bit bright & boxy and seem to struggle a bit with anything but simple acoustic music.  Adding in the subwoofer did help quite a bit, although I have to use it discretely since I'm a flat-dweller. 

Anyway, now I have re-arrange things and have space to accommodate some compact floor-standers either side of the TV unit - although I understand this might not be an ideal placement/separation:

Room is my main open-plan living space - 5m x 5m.  Old building with high ceilings.  Wood floors & not much in the way of soft furnishings.  Picture below. 

That space could accommodate anything up to around 850mm height x 300mm width x 500mm depth, although I'm sure some breathing space would be good and I don't want to overpower the room.  But the little Rega RS1s are definitely getting a bit lost. 

Budget is around or under £1000 - I am thinking that the used market is the way to go and I have read around on these and other forums and here are some ideas:

 

- Some form of PMC - GB1i / FB1i 

- Neat - Motive, SX 2  (SX1 is a bit too tall)

- Kudos X2

- Spendor -  A5, A5r, S6e...etc

- Some kind of Naim speaker - SBL ?

 

Use of the sub can be optional.  I definitely want a slight shift to a sound that is less fatiguing, with more solidity and a little more inner warmth, but nothing that will slip into sloppiness or become boomy.  I'm weary of anything that might be described as having a bright edge or be too dry. 

Music tastes - everything from classical, folk, indie to pop, rock, electronica. I don't listen at loud-levels at all. 

Also planning a move to a turntable at some point. 

Build quality is important to me too. 

 

Can anyone offer any advice on these speakers for my goals and my room?  Or any others I should be looking out for?

Thanks for reading.  Please help me to overcome my analysis paralysis & get back to the music. 

James

 

Posted on: 21 April 2016 by Huge

PMC twenty.21s are going to be something of a mullet with a Rega DAC and a Nat 5i.

They would match well with something more like a Chord DAC (2Qute or at least a MoJo) and a Nait XS as a minimum.  Even then with a 5m x 5m room you'd need to block the TL port (to make them work as a closed transmission line) to prevent them from excessively exciting the 34Hz room resonance.  The sub could be used to fill in below the PMCs natural lower frequency limit (but with a 34Hz notch filter).

Posted on: 21 April 2016 by Skinnypuppy71

Well the op did ask for speaker recommendations that would be responsive to further upgrades as he improves his system....which the 21's would definitely do......I know the 5i wouldn't drive them to the best of there abilities but it would drive them no less.as for the dac I wouldn't get to hung up on it being not of chords ability.I run a arcam ir dac into my xs with an Amazon fire tv box streaming Spotify...OK it's not audiophile material but would still surprise many to how good it actually sounds.

Posted on: 21 April 2016 by Jeb-Jeb

Okay cool thanks guys- I was definitely going to demo the PMCs as they are a staple at most of the local dealers.  From reading about them I was worried the bass may be very lean but it sounds like in my room I may have the opposite problem.

I could probably place them anywhere from right up against the wall to about 30cm away max and perhaps bring them in further for listening if it wasn't a PITA.

The system is definitely going to be a work in progress and I may not live here long-term.  I get the feeling nothing is going to be ideal here so probably just a case of making the best of it that I can.  Im ready to use subs and I'm quite keen on using the DSP correction suggested by Huge.

as I mentioned, probably will also be moving to an analogue front-end next.  FWIW I did demo the Hugo (I'm coming from a Headphones background) and preferred the Rega DAC by some margin, though never tried the other Chord offerings.  

btw- what does a Mullet mean, sonically - I'm guessing it's not good.

Are ATCs (e.g SCM 11, 19) something to consider?

Posted on: 21 April 2016 by Huge

ATC SCM19 needs a much stronger amp (NAP 250 minimum), I dont know for the 11 or 7, but I suspect they may need something in the SN2 class (or for the 7 a XS 2 may be sufficient).

Mullet refers to the haircut, not much at the front, loads at the back!

Posted on: 21 April 2016 by Huge

Your problem with bass won't be overall volume, but the quality (tunefulness) of the bass.  All your opposing walls produces a resonant tuned cavity at 34Hz in both directions, so you'll get a massive bass peak at that frequency.  If you use speakers with a reasonable bass extension (particularly your sub) and place them near the walls, then almost any bass note 25-50Hz will excite the resonance so much that you'll hear the 34Hz and not the actual note being played.

The worst excitation of the room mode occurs at the corners, then beside a wall, and the minimum is when the speaker is in the middle of the room.  This is why you have to move the sub to its current (somewhat inconvenient) location.  This is also what a DSP can reduce, so you can put the sub in a more convenient place.

You'll also need to be careful about mounting a turntable as these can also be affected by acoustic resonances.

Posted on: 21 April 2016 by Jeb-Jeb

Lol Mullet - I should have known - I'm a child of the 80s.

I need to take my amp along with me and find out what it can do.  I'm a little disheartened by its reported inability to drive the better speakers - since it seemed like a big investment at the time and I had the impression I was probably not doing the amp justice with the RS1s and there would be a good bit of growing room.

Not that I'm complaining - this is all a nice problem to have! I think I need to check this out for myself and I will report back. 

 Edit: just saw your 2nd post.  Great info - thanks!

Posted on: 21 April 2016 by Huge

Hi Jeb-Jeb,

More expensive amplifies can deliver very high transient currents very quickly, but this level of engineering costs.  Unfortunately not everyone can afford these beasts!

Many of the more expensive speaker designs (PMC Twenty series included) are intended to be used with these much more expensive amplifiers, so their designers don't make any allowance for the limitations of less expensive amplifiers.  It's not that the 5i is weak (it isn't, it's actually very capable for it's price point), it's just that it doesn't cost £3000+! so don't be disheartened.

Also, it looks as though you're in a flat.  In that case it's worth checking out how a speaker performs at low (i.e. reasonably neighbour friendly) volumes, some speakers like the PMC Twenty.21 loose rather more detail at low level than some others will do.

Posted on: 21 April 2016 by Skinnypuppy71

Well...I can only look forward to see what my little 21's are capable of then....if my current xs is a bare minimum  required to do them any justice....(It sounds amazing as is)I'd like to hear them on the end of a pre/power combo then.And which combo would suit them best?sorry if I've hijacked the thread a bit.

Posted on: 21 April 2016 by Jeb-Jeb

no worries, hijack away - I'm interested too! 

Posted on: 21 April 2016 by Huge

Hi SkinnyPuppy,

I would say a 282/200DR would probably be ideal, but an SN2 would also do very well and it's a more sensible price match.

However if you like them with the XS, then that's good.  We all listen in different ways and take different things from music.  Just because something has a bit of an engineering compromise in one particular way, doesn't mean that it won't sound really good to you; even if some other people find fault with the combination.  It all depends on how we listen and what's important to us individually.

Posted on: 21 April 2016 by Skinnypuppy71

OK..so I've got a few upgrades to get through before I reach the true potential of these little boxes of joy.lol.��

Posted on: 21 April 2016 by Jeb-Jeb

very good point on low-level listening - that is indeed a priority and I am pretty conscientious about this. Although the walls are very thick and I'm above a shop so after closing I can listen at reasonable levels. 

I understand about the limits of the nait5i.  I just need to find a speaker that will balance offering a bit of growing room without being too sloppy until an amp upgrade or 2. 

Cheers for you help. I'll see where I end up!

 

Posted on: 22 April 2016 by Huge

Wherever you go, enjoy the journey.

(and read this thread   "The Audiophile As a Social Construct...")