Coax project using Audison Voce II AVX 6.5 II speaker

[PB63]

Hmm, interesting that you got much better response than published on their home page!
I'll see if I can hop in Elettromedia next time I'm in Marche...

Audison AVX 6.5 II VOCEI II hi-res concentric coaxial

The Audison Voce AVX 6.5 II concentric coaxial delivers Hi-Res sounds with a pulp-paper cone and advanced crossover for pure, detailed audio.

audison.com

 

[ppataki]

Hmm, interesting that you got much better response than published on their home page!
I'll see if I can hop in Elettromedia next time I'm in Marche...

Audison AVX 6.5 II VOCEI II hi-res concentric coaxial

The Audison Voce AVX 6.5 II concentric coaxial delivers Hi-Res sounds with a pulp-paper cone and advanced crossover for pure, detailed audio.

audison.com

I suspect that their measurements were done using the supplied hardware crossover
My measurements were done with a custom digital crossover with totally different settings vs the supplied one
I am planning to try the supplied crossover too, at a later point

I am still collecting some listening experience with these drivers; I will post them here later on

 

[ppataki]

Let me share some subjective comments about these speakers after having spent like two weeks with them:

At first they sounded a bit boring but then they gradually started to open up (similarly to the 5.5" Sica I tested earlier)
They are hyper-detailed and extremely airy - I have never had any speakers like this in my living room in terms of 'airy and open' sound but without being harsh or fatiguing at the same time

Check this out with headphones to hear what I am referring to:

New video by Peter Pataki

photos.app.goo.gl

So from this point of view they are magnificent indeed

On the 'negative' side: midrange is not as forward as with any of my previous full range speakers (this might be 'normal', actually) and the speakers do not 'disappear' as much as for example with the 5.5" Sica drivers I tried (but that is not an apple to apple comparison since they were put in differently shaped and sized cabinets)

All in all I would put this on my recommended list. It is not cheap (500 EUR a pair) but the passive crossovers are included in that price (btw. I still have not tried those)

Next step is to try these in open baffle cabinets (I know they are not optimized for that but just for the fun of it)
I will publish that during the course of next week here

Any comments/questions are welcome

 

[PB63]

Please send a link of the music!

 

[ppataki]

Please send a link of the music!

Here you are: https://tidal.com/track/82218196?u

 

[ppataki]

So, as promised, I have put these speakers into an open baffle cabinet

I have never tried anything like this so I had totally no expectations - I knew that bass will suffer but more on that later

This is the 'cabinet'

Let's see the measurements!
(at MLP, approx. 250cm away from the speakers)

Left channel only, from 80Hz

As expected, not much down there.....

L+R, from 40Hz

20-25dB would need to be compensated with EQ

Let's see that in action, with the sub added from 80Hz:

Actually pretty good, but.....:

Distortion gets pretty high around 100Hz - gets a bit better with Dirac on (green curve) but still high
I can totally hear it when doing the sweeps but to be honest I don't think I can hear it with music....

IR got a bit worse due to reflections but still not too bad in my opinion:

Blue is with closed cabinet, pink is open baffle

What is really interesting is that GD became much much better (OB highlighted)

Subjectively:
I have to say I really love the sound - it is open, airy and the stage/instrument placement is definitely not worse vs. with the sealed cabinets (I was worried that due to the reflections that would be worse but that is not the case)
The only drawback that I think I hear is that the low-mids/upper bass lacks a bit of energy (despite boosting it with EQ)

Listen to these 3 videos with headphones:

3 new items by Peter Pataki

photos.app.goo.gl

Next step in probably a few weeks' time is to build the OB boxes into bass reflex cabinets tuned to Fs - stay tuned! (pun intended)

 

[ppataki]

Forgot yesterday, this is how the frequency response looks like now (in the OB cabinet), with all pre and post processing (incl. Dirac)

 

[ppataki]

Recently I have used these speakers for another project too
I have designed a cabinet in 3D and printed it with my Bambu A1 3D printer at home

The design is a classic cuboid with a size of 25x25x25cm but with a twist that the internal walls are angled by 3° so there are no parallel walls inside the cabinet
The port is tuned to fs which is 67Hz
This time I am using the passive stock crossover parts that come with these drivers in the box

See some pictures about the build process:

And the final looks after painting (using ultra matte chalk paint)

I have run some measurements in my home office, will share those in the next post soon, stay tuned!

 

[Raj21p]

Audison Voce coaxials are solid tuned more for smooth off-axis response than ruler-flat on-axis. If your enclosure sim checks out and you seal it well, they should perform nicely.

 

[ppataki]

Here are the measurements, taken in the MLP (approx. 75cm) in my home office

Frequency and phase using 1/12 smoothing

Now let's see the same with Psy smoothing:

I must say I was really pleasantly surprised!
The stock passive crossover is doing a great job, no huge anomaly in the frequency and phase response
The huge peak starting below 200Hz might be the room but it can be easily fixed with EQ (will show that below too)

Distortion curve is OK-ish but since there is going to be a subwoofer aiding the Audisons I am not too worried about that

Group delay is good:

Corrected response using 9 filters below 1kHz (1/12 smoothing)

IR and Step response of the corrected curve:

Wavelet looks really great too, barely any peak energy delay

How does it sound?
Listen for yourself using headphones!

This is the uncorrected state, zero DSP:

New video · Wednesday, Sep 10

Tap to view!

photos.app.goo.gl

This is the corrected state (those 9 filters)

New video · Friday, Sep 12

Tap to view!

photos.app.goo.gl

Overall I am really satisfied with these drivers in these ported cabinets - my daughters will be using them with one of the DIY DOS subs I have built previously - they love it already

Any questions/comments please shoot