Dear diyaudio, there are so many things that I can not handle right now, but still love to learn. Whatever I'm doing right now were nearly impossible tasks one year back. But all the notes and screenshots i took over the last few years....I'm implementing them today. So all the inputs you people are giving today, I'm sure il be using them tomorrow. Thanks a lot for all your help !!!
Building Two way speakers with Ahuja 12" and Compression driver
- Thread starter Naveenbnc
- Start date
That's an awesome advice on using a pc. Makes my life a lot more easy !!
I'm getting the 15" driver you suggested
I just gave an option and yes as diyaudio mentioned it will bring down the sensitivity. You can try adding washer with a magnet in front to fix it. The washer behind the cone should act as a sheild for magnet as well use atleast 2 to make the weight distribution more even
I would also suggest to go for a small fullrange to handle the mids/highs, maybe Boston/Philips 8" or something similar, there will be a wide band available to put the crossover, a simple 1st order could do.
Crossover for a compression driver will be technically challenging.
Crossover for a compression driver will be technically challenging.
i placed an order for Ahuja AS15-X200. By the time I get it, I will make the box ready.
Earlier you suggested a box with 20" width, 24" height, and 14" deep.
But that was for Iwai 12" will those dimensions nearly work for the 15" Ahuja??
Can you suggest please .....
Specs are here:
http://www.ahujaradios.co.in/speakers/professional-pa-speakers/as15-x200.html
Other things being equal a driver gets low qts due to a stronger magnet (ie higher integration of BL) and vice versa. Qts increases if BL is reduced (not easy to do), or mass is added or Re is increased. A driver that has low qts, say 0.3 when equalised will sound the same as a driver of qts 0.7 without Eq in OB. OB is dictated by Xmax more than anything else.
Also, if we compare good drivers, we find that all good drivers perform same. The vintage ones are easily surpassed by newer models. Beyond a point there is no point in sticking to a particular driver. Good ones are very well engineered and are a commodity these days. The pro audio drivers need high performance and are made for that purpose.
I see some FM s are die hard fans of vintage drivers. I just wonder if it's because they just love them ??? Or the new drivers won't perform or give that sound signature ???
With mass production, chances are there that quality build may be compromised,.... but advanced materials they are using now are lighter and stronger, and the audio technology itself is far more advanced, and latest drivers may surpass any old driver of the same league. My personal opinion....subject to correction.
Why is that, if they both have same frequency response, phase response etc?
A qts 0.3 does not move that much as compared to 0.7. A high sensitivity driver does not need much power to reach a particular target excursion. Same is true for OB, by virtue of its alignment, it doesnt need much power since there is no air compliance to stop the cone. Also I dont suggest that one should use qts as low as 0.3, I took the value just to explain the point. Irrespective of qts, a target excursion is needed to produce a target SPL. A high qts driver gets that excursion without (or little) Eq, a low qts driver will need Eq to get there.
Ideal driver is, of course, a moderately high qts driver. Its easier to do OB with a high qts driver. There are more high qts drivers locally available than a low qts, especially the unbranded and OEM ones. No one wants to use Eq so they search for a high qts driver.
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Pls see Q6 here http://www.linkwitzlab.com/faq.htm
For OB loading Qts greater than 0.7 is suggested. Low Qts performs well in TL or TQWT box loading. If you need to reduce Qts of driver you can add a parallel resistance twice the Re of the driver. Similarly you can increase Qts by adding a series resistance to the driver albiet at a lower sensitivity.
In the low end, the graph is a very good way of gauging the performance. A driver is not supposed to have its own tonality. A driver devoid of its own tonality is a good driver. All good drivers sound the same because of the absence of tonality. A driver is reproducer of music, not a musical instrument. Driver tonality is good for guitar speakers where they use tonality (ie harmonics/distortion) to produce specific sound, this distortion/tonality is part of the music. Once this sound is recorded, it must be played back as it is. Any addition of sound signature (or subtraction) by speaker is not accurate sound. Many speaker advertisements use tonality to confuse the buyer.
Tubes are non linear devices, they are more pleasing to the ears, the reason is that they add lower order harmonics (distortion). Low order harmonics makes the sound warm/sweet. They are vintage, niche and expensive, have a glow so probably people like them even more. Question is: are they accurate? Are they not adding their own signature to sound? Shoud we do that to all music that we hear? Music was created by the creators to be heard without anything added or removed. Music reproduction is objective, music creation is subjective, it should stay the same, we must not get them mixed. A member 'wesayso' over diyaudio has nicely put in his signature on that forum and it reads "Use Science to design your speakers and they will sound like a piece of Art... "
A funny update on a different note people....
Just for a trail, i just connected one of my Ahuja speakers to my center channel.
It just trashed my existing center speaker as if a buldozer crushes a small car
The vocals are clear and crazily loud. The male voice is so damn dynamic !!!
I didn't had a long and critical listening session. So i can't comment on refinement.
But its a crazy experience to have a dynamic sounding center channel at a price of 2k
Just for a trail, i just connected one of my Ahuja speakers to my center channel.
It just trashed my existing center speaker as if a buldozer crushes a small car
The vocals are clear and crazily loud. The male voice is so damn dynamic !!!
I didn't had a long and critical listening session. So i can't comment on refinement.
But its a crazy experience to have a dynamic sounding center channel at a price of 2k
I was particularly dissatisfied with center channel. I always wanted male vocals, truck engine sounds, a lions roar etc to be very dynamic.
I used branded ones in the range of 15 to 25k. But still not satisfied. I literally came to a conclusion that I have to shell out more money, and buy a good center channel in the price range of 30 to 50k But didn't had the budget to go ahead.
And this driver showed everything i was looking ..... @ 2k!!! I felt like laughing literally.
Whether ita Ahuja or some other driver.....now I'm pretty sure we can build a great center channel at a fraction of the price. Need to work on refinement though... It shouldn't sound shouty or harsh.
I used branded ones in the range of 15 to 25k. But still not satisfied. I literally came to a conclusion that I have to shell out more money, and buy a good center channel in the price range of 30 to 50k
But didn't had the budget to go ahead.And this driver showed everything i was looking ..... @ 2k!!! I felt like laughing literally.
Whether ita Ahuja or some other driver.....now I'm pretty sure we can build a great center channel at a fraction of the price. Need to work on refinement though... It shouldn't sound shouty or harsh.
I think one year back.... our FM ANIKET told me for the first time that we can make great speakers with PA drivers, for home purpose.
At that time i had zero knowledge about ht though. I was in the league of sony, samsung, creative Htibs at that time.
I'm already chalking plans for that
Center will be just OB, mounted in the middle of the wall. Behind the screen.
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