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Originally Posted by Invinsible Well, if am not wrong get a powerful amp, set the gain on the amp to the limit between half and 3/4. And never go beyond half to 3/4 volume range of the headunit. I think that should work..what say Gunbir paaji? ? |
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Originally Posted by abhinav.gupta88 So if i were to run the eclipse 7200 which has 8v pre out, i will have to reduce the gains if i want to play it at full volume too? |
Guys, lets clear this up again. The gain knob is a "sensitivity" setting. If your HU has a very weak preout, you will need to set the gain higher (more sensitive). If your HU has a strong preout your gains will have to be lowered (less sensitive). In either situation, it is important to
MATCH the amp to the HU's output. The Oscilloscope or DMM methods prove near accurate and help set the gains properly. Of course, a trained set of ears can also do this without the above but at best it may still be +/- 10% of the target.
Another thing we must realise is that the potentiometers (gain knobs) used in most amps (even some high end ones) are NOT linear. That means that usually when we see a gain knob and by common sense, set it at 1/4th or 1/3rd, it may still be too high. Why? because the gain knob is literally only functioning for the first 1/3 or 1/4th of its travel. If it reaches its max setting at 1/3rd (instead of all the way) and you leave it at that, it may be in fact set too high.
Some manufacturers may do this intentionally cuz consumers say "Oh look at my amp, my gains are turned way down low and it still kicks the subs". This is precisely why setting the gains by DMM is the least acceptable method. Its easier to focus on getting a target voltage on the DMM, wherever that may be on the potentiometers scale. We must also realise that manufacturers use cheap pots (potentiometers) and each peice may measure differently. So if you had the two amps of the same model, setting the gain at the exact same place visually may still output different power levels from each amp. Via the DMM method, one would concentrate on getting the exact voltage, whatever the setting on the pot.
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Originally Posted by Invinsible To get the 7200mkII get the most high end amps, Genesis, Tru, Steg, Zapco, and others i guess they all can take input upto 8V. Plus with this the true potential of both the Amp and 7200MkII would reveal. Everything is about matching the components in a right manner. Obviously one cant have full potential of high end amps from the basic head unit or vice versa. Also, like we all know its not just about the spec tech of the head unit that matters, its also the real world, the car acoustic coupled with great drivers and amp. What say Gunbir? |
Very true. Everything has a sonic signature. One of the most important things one can learn in this hobby is to pair things that work well together. A very bright, dynamic speaker (say Focal) and a warm amp (say Audison) made a great combination as they would work well of each others strengths and weaknesses. Again, this combination works but not everyone. We all have our own individual tastes that are ever so different in the smallest ways. Add to that the variables of the in car environment and you have the answer to why most people in this hobby change stuff so often. They simply play the trial and error game till they end up with a good mix that works for them.
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Originally Posted by Invinsible Gunbir paaji have got a chance to audition the 9887 with clarion may be not this model, anyother? Which one has a smoother sound production with softer tight clean bass? |
The 9887 wouldnt exactly have what I would call "natural" bass. It is a bit accentuated, but many people like that and it can work for the specific car environment too. If I had to take a leap of faith, I would bet the Clarion (assuming its a 7xx series or above) would have a more natural presentation over the 9887.
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Originally Posted by Invinsible Here's one of the example from the Zapco Competition series Amplifier. This one comes with shuffle switch between 1-4volt or 4-16volt operation. Not something one can find in many brands. Also the Damping factor is good quite high for excellent speaker control. |
Zapco uses that switch because their Symbilink (balanced line transmission) will deliver high voltage into the amp. That is normally when you would switch it to the high voltage setting. Others manufacturers also had similar balanced line transmission on their high end amps.
Damping factor is another often abused spec. Research it more and you will learn why.
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Originally Posted by Invinsible Anyways coming back to the topic are there any user's who have used or are using the kenwood who have also tried Alpine 9887 or the other way round? Which one the two has better vocal, highs or tonal quality? |
Points for overall tonality balance will have to go to Kenwood... I found the 9887 to have very strong midrange (something my system didn't need at all) and lack in the the top end a bit. If its overall tonality you seek the Clarion or the Kenwood would serve you well.
Cheers!