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Old 8th June 2009, 13:13   #421
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Der Alta it happens to all of us. When I first joined IBM (Yorktown Heights) my boss told me to up pack, set up and test a computer (computers inthose days came in bog boxes - bigger than a regular person).

So off I went, unpakced everything, hooked up all the doo-dads and thing-a-ma-jigs, et.. and then in the box I see a big red manual with the words "READ THIS FIRST" printed boldly across it's cover.
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Old 8th June 2009, 13:18   #422
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Yup. Most problems in India are solved by RTFM. Read the uhh.. manual.

Somehow, especially in India, people think manuals are ballast for the box.

Last edited by Sam Kapasi : 8th June 2009 at 13:24.
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Old 8th June 2009, 14:41   #423
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Here's some interesting basic read I found. Setting Sound System Level Controls

A lot of people misunderstand the gain setting to be as a volume nob of the amplifier output. Not realising that it depends on input sensitivity from the headunit and on the efficiency of the speakers. A lot of them complain of Clipping and amp shutting down not realising that it is coz of gain to high which is nothing incorrect setting of the gain as per the input sensitivity.
Yet I have noticed a lot many of them who run high voltage output headunits and run them on amps which have a limitation of input sensitivity and than complain of amp clipping or sound distorting at higher volume. It's like overloading the amp with the voltage current.

There are four issues here that need to be considered. They are:

The level of the signal source.
The gain of the amp and preamp.
The efficiency of the loudspeakers.
The desired maximum sound pressure level.

If one has a 5V headunit and an amp which has 4V max input sensitivity. Both may work in conjunction but may be at half the volume or even less one will hear the either some distortion or clipping or the amp may shut down for few mins and may work again after one has lowered the volume.
I hope am right at all this. If not, please correct me

Last edited by Invinsible : 8th June 2009 at 14:50.
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Old 8th June 2009, 17:25   #424
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thanks for the kind words rahul(invincible7). Glad you liked it.

I had set the gains in the same manner. Did not set the hpf from the amp. It's set through the hu though i'll try something between 63 and 80 to see if i like it more. But yes i too feel that you need to tune it according to your requirement and not what most installers do (the local ones who set the gains so high that even sometimes playing at very low volumes , the sound becomes so much that one is not able to take it to high levels.)
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Old 8th June 2009, 17:31   #425
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Quote:
Originally Posted by Sam Kapasi View Post
Somehow, especially in India, people think manuals are ballast for the box.
I was lucky. My boss would not have been pleased if I fried a mainframe on my first day. Till today I am still stuck in NRTM (never read the manual) mode. Someday it will bite me. I know. But old habits die hard, besides I figured most of these things are idiot proofed anyway.

Then there are some like my nephew. He rad the manual to set up a simple coffee machine (Jura).

Last edited by navin : 8th June 2009 at 17:32.
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Old 8th June 2009, 17:54   #426
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Oh by the way, i checked the manual but could not find the frequency the dot on the crossover setting represents.

Sam?
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Old 8th June 2009, 20:20   #427
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Quote:
Originally Posted by abhinav.gupta88 View Post
Oh by the way, i checked the manual but could not find the frequency the dot on the crossover setting represents.

Sam?
I'm guessing 100 or 120Hz. I will ask someone and let you know.
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Old 8th June 2009, 20:26   #428
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Thanks as that would be like a reference point for me to check if i like something around 63 to 80 hz.

Can this be checked by a multimeter or something?
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Old 8th June 2009, 20:35   #429
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Quote:
Originally Posted by abhinav.gupta88 View Post
Can this be checked by a multimeter or something?
No this cannot be checked by a multimeter. Or something, lol.
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Old 8th June 2009, 20:55   #430
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Hmmm.
Is it advisable to switch the HPF off from the HU and try to fiddle with the HPF settings on the amp?
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Old 8th June 2009, 23:54   #431
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Quote:
Originally Posted by abhinav.gupta88 View Post
Hmmm.
Is it advisable to switch the HPF off from the HU and try to fiddle with the HPF settings on the amp?
Am sure there is no problem with that. But on second thought doing it from the Head Unit will be more precise than the Amp. Plus whenever you wanna change and try something new or according to the genre of music you can do that seating in more comfortably.
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Old 9th June 2009, 00:46   #432
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But then i want to try out frequencies between 63 and 80 also which are not accessible by the HU.
Worth a shot?
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Old 9th June 2009, 01:15   #433
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You want your speakers to play below 80? Why?
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Old 9th June 2009, 12:09   #434
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To see if they play any better than at 80hz.
I quite like them cut at 80hz hpf.
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Old 9th June 2009, 12:25   #435
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Can you tell us what is the frequency range of the midbass or total frequency range of the components and the Fs of the Midbass.

A lot many times it depends whether the midbass are able to handle the lower frequency or not. Going below 80 they will play good at lower volume but as you go higher the midbass will start to distort and might bottom. I strongly suggest you keep it to 80. At 80 the bass is more stronger than going lower than that and is more suited for the midbass. Though my Morels play good even down to 50.

Last edited by Invinsible : 9th June 2009 at 12:33.
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