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Originally Posted by goldie My Boss has bought a new Skoda Superb Diesel May 09 Model...
Mr. Jacob Koshy from J & B Audio in Bandra |
I know Jacob from way back (80s). I heard he had moved to Santa Cruz, maybe he has moved back to Bandra.
In the Laura the ICE and Parktronic share the same display. In the new Honda Accord the dash's stock look has to be sacrificed if one wants a 3rd party HU. So if your boss's Superb has similar issues he might have to make some decisions as to what acrifices he is willing to make. Even in the old (1996) Opel the cassette HU (Philips) used the same display as the car's outside temp gauge, date/time clock, etc.. adding a 3rd party HU to such cars means sacrificing looks or functionality or both.
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Originally Posted by akbaree I am using Dynaudio Esotec 362 just as an example.
MW172 (woofer), MD142 (midrange), and MD102 (tweeter)
Cotinuous Power Handling: 200 RMS @ 4 Ohms
Now, the three drivers combining to form this system are availabe seperately as well.
MW172: 150 RMS @ 4 Ohms
MD402: 100 RMS @ 8 Ohms
MD102: 100 RMS @ 8 Ohms
My question is: if we are making a 3 way system using the passive crossover provided by Dynaudio, how can the power requirement and impedance change? |
The power rating for the tweeter and midrange as stated above is not complete. Usually such drivers have a power rating that reads as follows
MD102: 100 RMS @ 8 Ohms
@ 12db/oct @ 3kHz
or
MD402: 100 RMS @ 8 Ohms
@ 12db/oct @ 300Hz
Musical energy is not equal across the entire audible spectrum. For typical old school music (western classical and 60s and 70s rock) about 50% of the musical energy is below 300Hz, about 75% is below 1250Hz, about 85% is below 2500Hz, etc.. Hence if you have a 3 way using 300Hz and 2500hz as your Xo points the woofer will handle about 50%, the midrange about 35% and the tweeter about 15%.
Lastly most dynamic drivers are not limited by the ammount of thermal power they can handle but by the phyicial limits of their suspension. One can blow a tweeter with just 2W at 100Hz becaue the tweeter's suspension wont be able to control the movement of the cone/dome.
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Originally Posted by akbaree When we are running a 2ohm DVC sub with a 2 channel amp in bridged mode (4 ohm load on the amp), what would be impact on other parameters like damping factor, THD, SN Ration,et al. Navin can you answer this once again. |
Typically if you are running a 4 ohm sub using a 2 ch. amp in briged mode each channel sees an equivalent of 2 ohms. It is not often recommended but most good modern car amps are capable of surviving this.
Yes Damping factor will be affected but the affect on THD and S/N ratio would be minimal (audibly negligible) if the power supply does NOT run out of steam. However budget car amps with poor power supplies will huff and puff with such a load. Ideally try to ensure that each channel of your car amp sees a minimum of 3 ohms and a maximum of 6 ohms (above which you loose efficiency).
akbaree, I am humbled by you asking me; but you must know that I am NOT a professional in audio. I am not affiliated (nor ever was) with any audio company or distributor/dealer. I am sure that the pros (Sam K, Autophile, B&T, LBM, Gunbir, etc..) would be better able to explain such details. The content of my posts might be incorrect or misleading.