any updates on the accuracy of audio nirvana T/S specs?

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thanks gafhenderson ,lets get back on thread.I too would be very interested in enabling experience.My AN10's have some little shrieks higher up that I would like to clean up and I am about to try the 99c whizzer trick.Will also try BSC for the cost of a few resistors and caps etc although I feel this may take some of the liveliness away.The AN's are like the life and sole of the party great fun to be with but can tire you out sometimes.

However even if this cannot be tamed they will remain as they are such good fun to have around
 
I can use Graphs only in lack of toilet paper... I first must appropriate listen to a Loudspeaker before I can make any Conclusion... but that's just me 🙂

i think its fair to say if i don't like a bright flashy sounding speaker so buying one with a very sharply rising frequency response would be a poor choice, just like buying a crappy PA driver like the one i've been experimenting with would be a poor choice if i like good tonal representation?

i agree i need to listen to them ultimately but i can look at graphs and opinions and narrow down the gamble somewhat surely?
 
toe them in for couple of degrees and everything is ok

you got to hear them, otherwise this is all just theory nonsense


PS: I have often fall in Love with womans that are "ugly"... 😀 what is the purpose of "golden ratio" 60-90-60?! that's ridiculous 🙂

PPS: beware of Matrix!
 
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toe them in for couple of degrees and everything is ok

you got to hear them, otherwise this is all just theory nonsense


PS: I have often fall in Love with womans that are "ugly"... 😀 what is the purpose of "golden ratio" 60-90-60?! that's ridiculous 🙂

PPS: beware of Matrix!

haha!

ok i'll give them a go. question is 8, 10, 12 or even a 15? guess there's always someone who will likely be happy to give them a good home if they don't agree with me.
 
10" is the best I think 🙂

here is BL Horn
http://www.syraha.de/foren/msg.php?f=audiotreff_hoerner&idx=18742&
http://www.visaton.de/vb/showpost.php?p=239473&postcount=98
http://www.exdreamnet.de/forum/user/Niwo/AN10CF_Mohai2.jpg
if someone need details I can ask, there is behind the driver some "i-dont-know-what thing" with 4 holes for surpressing resonances and peaks or something like that, excuse me for my english

here is the Thread Mohai Midget BL Horn
http://www.hifi-forum.de/viewthread-104-7770.html
here is the "thing" with holes lol
http://www.hifi-forum.de/index.php?action=browseT&forum_id=104&thread=7770&back=&sort=&z=8
 
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@ P10:

Many thanks I really should look that design up.....I preferred the specs for the 6" in the same range (i think), but an 8" full range system is appealing none the less.


I dont see a variance of even ± 20% in Q and Maybe also Vas, as a huge problem, as long as Fs is close, AND I also dont regard TS specs as being a perfect measure of QC. I the driver is well put together, then thats more relevant.

Id try the cast AN8...at a push the AN10?

Stamped steel in a larger driver scares me a little but go with them if you have confidence in the thickness of the stamping. You can always reinforce them, as any number of people have probably said 😀, my fave is to use P38 or mabye its P40.


(I have some 10" instrument speakers, and Ive never seen a frame so thin, these can actually be deformed by my twisting of the frame! Almost amazingly(sarc), one was warped when I got them. A local bands' heavily gigged basscab) I just bent it back to shape....
 
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I dont see a variance of even ± 20% in Q and Maybe also Vas, as a huge problem

No?

As Frankie Boyle would say, 'if you thought Tony Blair was a %$£#, watch this': 😉

Same driver (an FF165wk if you're interested). I simply fooled with the T/S values slightly to give an idea of how the alignment & behaviour changes with a given vented box Vb & Fb. Speaking generally, huge problem? Depends on driver, circumstances, alignment et al. Audible? To paraphrase somebody else (Francis Urquhart), 'you decide. I couldn't possibly comment.'
 

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No?

As Frankie Boyle would say, 'if you thought Tony Blair was a %$£#, watch this': 😉

Same driver (an FF165wk if you're interested). I simply fooled with the T/S values slightly to give an idea of how the alignment & behaviour changes with a given vented box Vb & Fb. Speaking generally, huge problem? Depends on driver, circumstances, alignment et al. Audible? To paraphrase somebody else (Francis Urquhart), 'you decide. I couldn't possibly comment.'

I dont consider it a HUGE problem, no. Obviously less span of tolerance is better but after all placement makes at least as much difference to the lower bass registers, as that level of variance in T/S values.
 
Just wondering. Doubt that I'll ever buy any. Got too many box-less drivers already! I see that the full range 15 has a short phase plug. Maybe the tweeter already acts as one. Don't know. Also don't know at what freq the tweet comes in.

I know that feeling. Well knew, until I had a clear-out. I'll regret that one day no doubt... :bawling:

Possibly; it'll depend on the cone profile etc. Or it should anyway; whether a phase plug is itself beneficial depends on the driver. Interesting thought though; I seem to remember a similar idea being forwarded when the old Pioneer B20 was still with us, for use with one of those tiny Dayton tweeters. Not sure if anyone ever tried it though.

I dont consider it a HUGE problem, no. Obviously less span of tolerance is better but after all placement makes at least as much difference to the lower bass registers, as that level of variance in T/S values.

To be sure, the room dominates below ~300Hz, & when relevant the amplifier output impedance has to be factored in. I'd still call that an unacceptably wide variation in alignment though.
 
I dont consider it a HUGE problem, no. Obviously less span of tolerance is better but after all placement makes at least as much difference to the lower bass registers, as that level of variance in T/S values.

True, but consider how much more impact the room has on a severely under-damped alignment if the specs indicate a small cab tuned high that instead should be in a large cab tuned low.

Another consideration is that how much the alignment 'rings' isn't affected by the room, only the cab alignment, so for 'FR' drivers this situation can be very audible up through the critical mids.

Bottom line, for folks that like their music 'colorful'/'rich', it's probably not a big deal, but for the rest of us, specs that vary this much are completely unacceptable.

I wonder, if you bought a car for it's high performance only to find it was just another run-of-the-mill 'grocery getter', if this wouldn't be a HUGE problem either.

GM
 
I have been building the bass reflex cabinets for the AN drivers for about three years now. We build cabinets and custom systems for just about any design and have clients who have ordered Tony Gee, Zaph, and Troels Graveson designs, but we sell the AN cabinets in much higher quantities because of the affordability. There are three recording studios I know of using the AN Alnico 8 drivers in the monitor cabinets and they all love them. We have had only one complaint regarding the sound in three years and probably just over a hundred pairs of the various David Dicks BR designs.

FW
 
dear me! I didnt expect to get flamed for that. I agree with your points guys, but you miss mine. Im not talking about tuning identically, and resultant different alignments. Im talking about aligning carefully, if one speaker has f3 at 50hz and the other at 60hz but similarly aligned, ie roll of rate similar and qtb similar, then its not a massive issue, as room modes will write off the flatness of the max flat alignment anyway. Surely this is why sealed can work alot better than raw digits imply. Anyway, theres more 'colour' in any FR ive used than in a decent 2 way (not the point of my post, OT). And colour seems to be what many FR fans desire. In short, id go with sealed or OB if ts specs are quite different. SBB4 and max flat alignments make good boom boxes, if i had a huge home then theyd appeal more.0i tend to tune for a 3 to 6 db roll off thru fs nowadays in vented boxes.a detuned damped TL, or aperiodic box would be fun to try. I love the way u guys think i like coloured reprdoduction...even more amazing that the experts here, mostly self professed, can be so confident in their pensionable ears...and so derogatory to those who also have knowledge, and a valid pov. Maybe the car is analgous to this mentality. After all 3 ton of chevy makes a big noise, bt with doubld the power to weight, the euro shopping cart goes quicker on less fuel. Pointless insultory attitude...
 
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My two cents on Audio Nirvana

Being new to the DIY audio scene and recently experimenting with AN drivers I wanted to clarify that Dave does sell his own brand, Audio Nirvana, drivers. He also trades in vintage electronics, other brands of speakers, etc. - not just his own designs.

As for the response graphs, I have no idea what the graphs look like for the units I purchased, at what temperature they were made, microphone used, etc. but I can promise you they sound fantastic. I selected AN to play with because they don't require crossovers and the cabinets are easy to build. And WOW are they detailed and dynamic! They give my much, much, much more expensive Avantgarde Duo's a run for their money....almost to the point that it becomes embarrassing 😱

SET amps generally don't measure well either but they can sound fantastic.

For me personally, graphs are useless.
 
This thread has gone in many directions, but wanted to add my two sense...

I have a pair of AN 12" cast frame, 5.6 cabinets. I am very pleased with the sound quality of the speakers. David Dicks is an honest guy and takes care of his customers. If you decide to purchase AN, I am sure you will be satified. If not, David will make it right...
 
True, but consider how much more impact the room has on a severely under-damped alignment if the specs indicate a small cab tuned high that instead should be in a large cab tuned low.

I had thank you

Another consideration is that how much the alignment 'rings' isn't affected by the room, only the cab alignment, so for 'FR' drivers this situation can be very audible up through the critical mids.

This is true, but again, misread/ misunderstood my point

Bottom line, for folks that like their music 'colorful'/'rich', it's probably not a big deal, but for the rest of us, specs that vary this much are completely unacceptable.

implication that I cannot hear as well as others. Veiled insults. There is NO_ONE here with 'Golden Ears', we can all train(and untrain) our ears to hear(or ignore) different distortions

I wonder, if you bought a car for it's high performance only to find it was just another run-of-the-mill 'grocery getter', if this wouldn't be a HUGE problem either.

To the best of MY knowledge, driver mftrs dont offer a guarantee? or guaranteed spec....just a gentlemans agreement....

My ACTUAL point? who knows. lol I wouldnt let a larger than usual tolerance span of TS values stop me using AN drivers, IF i wanted to use them. There are more important things in this world than numbers.
 
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