Audio Nirvana Fullrange 8" super alcino plus

[freddi]

yes GM - that Classic alignment looks better than stuffing into too small a box. Xmax is hit around 2.83v input but bass may be usable to low 30s.

Source Z effect

 

[GM]

 

[iheaka71]

sounds like a whole pile of nonesense, boy oh boy!


also, I expect no benefit in getting the AlNiCo over the ferrite other than making the manufacturer richer at your expense - be careful, this hobby is full of BS

You are very correct. I may be going with the ferrite and use left over money on a good DAC or something. If the Alnico is better, it would only be by 5% and barely noticeable.

 

[GM]

Basic wiring performance criteria used for wiring is voltage drop over distance, so only need to compare this spec to find which has widest BW for a given wire gauge, length.

AlNiCo is a bit of a heat sink Vs ferrite being an insulator, so when things [VC] start heating up, Qts' starts increasing, altering the frequency response, so with low Xmax motors and enough power to overdrive them on transients I want a nice big slug of AlNiCo in a big fat return pot to keep them smooth as a 'baby's bottom'.

Anyone that's compared an Altec 416 and/or 515 [or similar] with one of each type motor knows where I'm coming from and why for HIFI/HT apps I have no plans to ever deviate.

GM

 

[iheaka71]

Basic wiring performance criteria used for wiring is voltage drop over distance, so only need to compare this spec to find which has widest BW for a given wire gauge, length.

AlNiCo is a bit of a heat sink Vs ferrite being an insulator, so when things [VC] start heating up, Qts' starts increasing, altering the frequency response, so with low Xmax motors and enough power to overdrive them on transients I want a nice big slug of AlNiCo in a big fat return pot to keep them smooth as a 'baby's bottom'.

Anyone that's compared an Altec 416 and/or 515 [or similar] with one of each type motor knows where I'm coming from and why for HIFI/HT apps I have no plans to ever deviate.

GM

So what does all that mean? Not trying to be rude. Like you have to speak to me in newbie English.

Its like me talking to you in my professional language saying "MSH|^~\&||.|||199908180016||ADT^A04|ADT.1.1698593|P|2.7
PID|1||000395122||LEVERKUHN^ADRIAN^C||19880517180606|M|||6 66TH AVE NE
You will say, what the heck is that.

 

[mp9]

-
AlNiCo is a bit of a heat sink Vs ferrite being an insulator, so when things [VC] start heating up, Qts' starts increasing, altering the frequency response, so with low Xmax motors and enough power to overdrive them on transients I want a nice big slug of AlNiCo in a big fat return pot to keep them smooth as a 'baby's bottom'.
-
GM

I did not know that. How about neodymium?

 

[Scottmoose]

Good for tweeters (size). As a broad rule, it loses strength at higher temperatures though.

 

[Bigun]

I can’t say my ears would be able to withstand the volume of running my 15” full range until the ferrite magnet got warm enough to be an issue

 

[mp9]

I can’t say my ears would be able to withstand the volume of running my 15” full range until the ferrite magnet got warm enough to be an issue

Me neither, although I can see it happening with inefficient low 80db power-hungry drivers and impedance swings dipping down in the 2 Ω ohm region.

YouTube

 

[mp9]

So what does all that mean? Not trying to be rude. Like you have to speak to me in newbie English.

Its like me talking to you in my professional language saying "MSH|^~\&||.|||199908180016||ADT^A04|ADT.1.1698593|P|2.7
PID|1||000395122||LEVERKUHN^ADRIAN^C||19880517180606|M|||6 66TH AVE NE
You will say, what the heck is that.

Right on!

Btw, If you're into 10" drivers check out the offerings from Cube Audio:

F10 neo Fullrange Drivers

F10 Fullrange Drivers

I'm more interested in their 8" drives, specifically the F8 Magnus -

F8 Magus Fullrange Drivers

Fullrange Speaker Fc8

 

[GM]

Good for tweeters (size). As a broad rule, it loses strength at higher temperatures though.

Interesting! My 'adventures' in magnets ended with samarium–cobalt (SmCo), which had the highest heat resistance by far, so figured neodymium would be at least as good.

If only really good for tweeters, then why is prosound manufacturers pumping out so many new drivers in all sizes up to at least 21" with up to 4 kW ratings?

GM

 

[Scottmoose]

Well, AFAIK max operating temperature on most neodymium magnets is about 80°C - 120°C with a few specialist types developed that can get up to about 220°C; curie temperature is around 320°C. Most SmCo are well ahead; max operating temperature about 250°C - 550°C depending on grade & curie point 700°C - 800°C (ditto).

Pass. I assume they've spent the coin on one of the handful of grades with a better temperature coefficient & are after reduced mass. Probably good for advertising also, and with sufficient heat-sinking & dispersal of individual slugs they can presumably keep temperature rise sufficently modest not to be a problem most of the time. Given that it's also rather brittle & prone to chipping &c., I can't say I'd call pro-audio the ideal environment for a neo-motor woofer on that front either, but YMMV.

 

[mp9]

Samarium-Cobalt magnet is not a spec I can recall coming across WRT loudspeaker driver magnets, needed more clarification and found the following link:

Loudspeakers Magnetic Materials

- no mention of the Lanthanum-Cobalt magnet as used in the Fostex 166EsR drivers.

Google search led me to the following link but I find the text confusing WRT the La-Co substitute Sr ferrite magnets:

Hitachi Metals>News Release>2007>February 14


Anything more you guys can you tell me about La-Co magnets, and or the new La-Co substitute Sr ferrite magnets WRT loudspeaker drivers and which manufactures if any are currently using them?

 

[iheaka71]

Right on!

Btw, If you're into 10" drivers check out the offerings from Cube Audio:

F10 neo Fullrange Drivers

F10 Fullrange Drivers

I'm more interested in their 8" drives, specifically the F8 Magnus -

F8 Magus Fullrange Drivers

Fullrange Speaker Fc8

The Cubes are too pricey and I don't think they sound as good as the AN.

 

[mp9]

The Cubes are too pricey and I don't think they sound as good as the AN.

I haven't heard any of the Cube's or AN drivers for that matter and have no idea if Cube audio drivers are worth the premium price tag.

 

[GM]

Well, AFAIK max operating temperature......I can't say I'd call pro-audio the ideal environment for a neo-motor woofer on that front either, but YMMV.

Thanks! Saved me a bit of 'due diligence'. Definitely marginal with the pro motor designs I last was involved in 2000, but the weight reduction would be nice, though 'brittle' makes it a non starter unless power mixed in epoxy like we did the early cobalt magnets.

Regardless, after a bit of nosing around, seems 'let there be light [weight]' is the current prosound mantra, what with the huge folded horn stacks needed nowadays.

GM

 

[GM]

Samarium-Cobalt magnet is not a spec I can recall coming across WRT loudspeaker driver magnets

Thanks for the links, didn't occur to me search such a subject. Anyway, all my 'adventures' in magnetism was small DC motor design back when our only go-to was Union Carbide and later, NASA Tech Briefs.

GM

 

[Mattes]

Hi,


if you´re thinking about spending 1600 bucks on a pair of chinese drivers, there are several alternatives in, below or slightly above that price region:


- Sonido from Hungary, drivers are fine, but require some work to really shine (like most fullrange drivers in my opinion). Available with AlNiCo motors. http://www.sonido.hu/adat_pdf/sfr-200a.pdf

- Seas Exotic. AlNiCo and good. X1-08 EXOTIC F8

- Enviee. AlNiCo, good but more expensive. enviee - Der Breitbandlautsprecher

- Supravox. 215-2000 Full range drive unit 20W / 99dB / 4 Ohms - Supravox

- The good old Fostex F200A, but possibly difficult to find. F200A | FOSTEX(フォステクス)

- EMS. Very good. For a little bit more money available even with fieldcoil motor, but also PM motors perform well. Fieldcoil: https://solen.ca/products/speakers/home-speakers/fullranges/lb8exmkii/, PM: https://solen.ca/products/speakers/home-speakers/fullranges/lb8mkii/



And possibly many more, but that´s what comes to my mind now...
As always, it´s a matter of taste, and final quality is a matter of implementation, there´s no such thing as a better or worse driver or speaker...


All the best


Mattes

 

[iheaka71]

Hi,

if you´re thinking about spending 1600 bucks on a pair of chinese drivers, there are several alternatives in, below or slightly above that price region:

Thank you for the recommendation. A big part of it is also the customer svc. David Dicks, the Audio Nirvana has given me. That adds about 10% more value to the AN drivers. I have speaking to him for the past 2 months about his speakers, the box build etc. He never rushes me off the phone and always willing to talk to me. He responds to email promptly as well.
I will search for the ones you recommended and see what they are about.
Those Sonidos sound nice but I dont see a price list and half the content is written in a different language.

 

[Scottmoose]

Yes, it's a pity many foreigners use different languages.