23rd June 2009, 09:57
| #76 | |
| BHPian  Join Date: Jan 2007 Location: Bang!
Posts: 652
Thanked: 6 Times
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 The thread was a little serious all these days till my picture came up and OT talks. Hope AK doesnt mind. Last edited by shreyasma : 23rd June 2009 at 09:58. | |
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Sorry, I meant shaadi.com-style relaxed informal pics ('huduga ella kelasa maduttane' type), as opposed to 'stiff' PP photos, for the family album.
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23rd June 2009, 13:04
| #77 | |||||
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23rd June 2009, 13:19
| #78 | |
| BHPian Join Date: Dec 2007 Location: Raleigh,NC
Posts: 141
Thanked: 19 Times
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 Last edited by bkishore_77 : 23rd June 2009 at 13:21. | |
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23rd June 2009, 13:36
| #79 |
| Senior - BHPian  Join Date: Mar 2007 Location: Bangalore
Posts: 8,069
Thanked: 2,919 Times
| Times have changed, na. Earlier it used to be the girls whose qualities were presented: can sew and do embroidery ("see, see the table cloth?"), sing ("come on ma, sing that bhajan?") and dance ("she was awarded gold medal by Swami so&so"), cook ("all the sweets and samosas are made by her, even the tea"), MA pass, etc. etc. Now it is the 'boy' who comes under scrutiny (electronic mediium) - "Eji, can you check if the boy can cook and clean the house? You know our ladli cannot do one paisa worth of work"!!! Sorry, AK, this was serious OT!  |
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23rd June 2009, 18:39
| #80 | |
| Senior - BHPian  | Quote:
You need 4 channels to biamp a set of components. | |
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24th June 2009, 08:54
| #81 | |
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2nd August 2009, 13:32
| #82 | |
| BHPian | Quote:
You can see my reflection in the sub driver...  You can see how precariously the light is secured. It used to reflect badly from the chrome plate of the mono amp so I have now mounted it with LED facing the wall. Will need some work to fix it...  The broken edge now goes at the back where it has support, so no worries.  | |
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2nd August 2009, 13:44
| #83 |
| BHPian Join Date: Jan 2007 Location: Bang!
Posts: 652
Thanked: 6 Times
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2nd August 2009, 13:46
| #84 | |
| BHPian | The re-tuning part... I always thought that I was good in mathematics but my belief has started to shake. I had already shared how my initial TA calculations were all wrong. This time I realized that I had messed up with the Sub box volume calculations as well. After some extended listening session, I had started feeling that my Sub is not playing lower frequencies with an aplomb. Some songs will have a phuttish (I cannot define that sound any better) kind of bass sound. This has been more evident now because of getting the TA right. It gave me an indicator that there's an issue with the volume. Thanks to Shreyas who shared with me some online calculators for a wedge enclosure. On recalculation it came out that the box volume is 1.0 cubic feet and with all the stuffings, the volume was close to 0.65 cubic feet; a good 0.2 cubc feet less than the minimum recommended volume. So out came the half of those stuffings and the volume is now 0.9 cubic feet. The Sub sounds straight out of the heaven and I can now correctly calculate the volume of a wedge box without an online calculator (not that any special skills are required  ).Note: I am feeling sad that I had abused the Sub, initially with high gains on the Amp to compensate the wrong volume of the box to get that extra punch. The voice coils of the Sub might be cursing me. I am not sure if that abuse has reduced their lives. I can only pray that they haven't. | |
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2nd August 2009, 14:40
| #85 | |
| BHPian | Re-tuning (part 2)... I couldn't believe that 0.2 cubic feet can have so much tonal difference in the sound of the Sub. But my lust for betterment remained unsatiable. I don't know, but with more time I am spending with my system, I feel that the above statement is more of a misnomer. I agree with the Gurus that more options you have (like equalization, crossover, etc) the more you tend to abuse them. But any informed user may begin with an abuse but may end up with an great sounding setup. At-least that's how it has been in my case. On exploring further, I realized that compromising on crossing the Sub at 80 Hz is not a good idea. But the front components have Fs at 86 Hz and so crossing them below 80 Hz anyways doesn't achieve much. So what do I do now? I am now crossing the Sub at 63 Hz and the front components at 80 Hz. I have been using 4th order crossovers (from the HU). After scratching my head for some days, I thought of playing around with the crossover settings. To bridge that frequency gap, I have started using lower order crossovers. I am now using a 2nd order crossover (12db/octave instead of 24db/octave) on the Sub and a 1st order crossover (6db/Octave) on the front components. With TA I don't need the advantages that higer order crossover give. Gurus, please share your thoughts if I have moved in a wrong direction.  The sound stage has improved greatly and the integration of fronts and Sub is just awesome. I am loving this journey. The best my system has ever sounded. I am saying this for amateurs and noobs like me that if you know the weaknesses of the drivers and also know how to exercise the equalization, and other options like TA, Crossovers to address those weaknesses, you can use them to have a great sounding set up without needing to spend a bomb. I still have a long pending list of experiments to do... but that would take a long time. Till then, keep enjoying your music... P.S.: Thanks frankmehta; your assertion that there's a pause button encouraged me to find one. Out of the 19 control buttons on the interface of this HU I regularly use 17 of them (during a CD playback and I only play audio CDs). The pause button happen to be one of the three buttons that I don't get to use. It is the number 3 button on CD7100. If they can mark buttons 4, 5 and 6, I am not sure why the hell they didn't mark number 3. Last edited by akbaree : 2nd August 2009 at 14:42. | |
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2nd August 2009, 16:36
| #86 |
| Senior - BHPian | |
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2nd August 2009, 17:14
| #87 | ||
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also in a car the odds of hearing any difference due to bi-wiring gets minimised when the car gets switched on, thus you wont really hear much of a difference, well actually that means a noticeable difference anyway. So IMHO its a bit of a waste of wiring Quote:
so now if you have the same crossover point on your midbass then what happens is that where the output of the two drivers drop then you will have a slight hump in the response because you have two differen drivers outputting the same frequencies, this effectively makes it seem like theres too much of that frequency hence when speaker designers actually design crossovers then they get the actual crossover point to be at the -3db point of the drivers but if for example you were using a butterworth filter it would be at the -6db point with a slope of 12db/octave whilst if you used a linkwitz reilly filter it would be at the -12db point with a slope of 24db/octave so technically having a bit of an underlap is actually required if you were aiming for a really flat response because you have for example a 40hz crossover low pass for your sub and a 60hz high pass for your midbass then the bits inbetween get up to the same levels of output as the rest because both the drivers are reproducing those frequencies at a decreasing rate and once you fully understand slopes and how to calculate actual crossover points you can calculate exactly what your low pass and high pass filters should be set at. thats already how passive crossovers work Last edited by naughty001 : 2nd August 2009 at 17:26. | ||
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2nd August 2009, 17:23
| #88 | |
| Team-BHP Support   Join Date: Mar 2004 Location: Mumbai
Posts: 25,196
Thanked: 9,298 Times
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There are no absolutes in audio. That is what makes it so much fun, irritating, contentious, and gets us all hooked. Oh I forget there are TWO absolutes. 1. There is NO Holy Grail. - That would kill the fun wont it. 2. Trust YOUR ears. - Most people do not trust themselves enough. | |
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2nd August 2009, 18:59
| #89 | ||
| Senior - BHPian Join Date: Mar 2007 Location: Bangalore
Posts: 8,069
Thanked: 2,919 Times
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(Sorry AK, just couldn't resist it!) Quote:
Must have an audition some day. Great job, AK. | ||
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2nd August 2009, 19:56
| #90 |
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