[low_bass_makker]

You are welcome !!!!

[abhipuru16]

Have another question, can a 6" Midbass rated as-
60 Watts RMS
48Hz-25Khz
handle HPF at 65Hz at 130Watts RMS power safely or will it stress the driver?

[DerAlte]

HPF, definitely. 130W pushed into a 60W driver? Even though you would never reach pushing 60W into it, if you manage to it will distort terribly for a short while before you recite "Ram nam satya hai" to the puff of smoke that comes out.

[thelord]

@abhipuru16
The lower mid-range might be affected if you cross the mid-bass driver that low. I'd say 70Hz with 24 dB slope is a good option. If the slope is fixed at 12 dB, then cross it at 80Hz to be on the safe side.

[Mi10]

Originally Posted by thelord

@abhipuru16
The lower mid-range might be affected if you cross the mid-bass driver that low. I'd say 70Hz with 24 dB slope is a good option. If the slope is fixed at 12 dB, then cross it at 80Hz to be on the safe side.

Steeper slopes can induce phase difference, i wouldn't go more than 12 db for Midbass drivers. 80 Hz @ 12 db slope works fine for most setups

[abhipuru16]

Originally Posted by DerAlte

HPF, definitely. 130W pushed into a 60W driver? Even though you would never reach pushing 60W into it, if you manage to it will distort terribly for a short while before you recite "Ram nam satya hai" to the puff of smoke that comes out.

^^^^
Just didn't get what you were trying to say there?


Anyways, without reading any replies here, I went to my car and adjusted the HPF to just a hair above 65Hz as it goes all the way from 65Hz to 4500Hz. Sounds much better.
Also, I reduced the LPF as well, but still, I did the LPF setting quite hurriedly so I will listen to the setup like this for a few days and again tune it if need be.

[abhipuru16]

Google Image Result for http://www.tradizioweb.de/blaupunkt/download/vpa4130proConnection.gif



Check this link, this is what the knobs look like and before you correct, the upper limit for HPF is 4khz and not 40khz.

Can somebody tell me of a way to set the crossovers accurately.


P.S. Open the image in a new window and then zoom into it.

[abhibh]

Originally Posted by thelord

@abhipuru16
The lower mid-range might be affected if you cross the mid-bass driver that low. I'd say 70Hz with 24 dB slope is a good option. If the slope is fixed at 12 dB, then cross it at 80Hz to be on the safe side.

Originally Posted by Mi10

Steeper slopes can induce phase difference, i wouldn't go more than 12 db for Midbass drivers. 80 Hz @ 12 db slope works fine for most setups

Both of u SQnuts hold your horses. Hes using Stock HU and he cant play with Slopes. AFAIK amp is at 12db octave.

@Mi10 playing with slopes results in better integration of drivers. Though what you are saying is right in theory.

Originally Posted by abhipuru16

Google Image Result for http://www.tradizioweb.de/blaupunkt/download/vpa4130proConnection.gif



Check this link, this is what the knobs look like and before you correct, the upper limit for HPF is 4khz and not 40khz.

Can somebody tell me of a way to set the crossovers accurately.


P.S. Open the image in a new window and then zoom into it.

1. On your speaker channel just select 70hz highpass (HPF). Just move the crossover selector to HPF.

2. On your sub channel just play with 90-70hz lowpass (LPF). Again move the crossover selector to LPF. You can also set the subsonic filter on sub channel at 25-30 hz depending upon your sub limits / music you usually listen to.

[abhipuru16]

I know where to set the crossovers. But, the range is too high, specially in case of HPF that it is difficult to approximate 70/80hz in there. Same goes for LPF.

[DerAlte]

1. I meant that the mid-bass driver voice coil will overheat and open out (solder joint) if you manage to drive 130W into it for a sustained period
2. The potentiometer to set HPF frequency is likely to be logarithmic, i.e. widely spaced mechanically at the lower end, and closely spaced at the upper end. No way to be very exact (you have been worried about this aspect), but you can try turning it by 30deg clockwise. 30deg is about 5 minutes of the minute hand on a watch/clock. The initial position seems to be at 37.5min on a clock face, so set it so that the setting slot is horizontal. Bit by bit move it CW or CCW till you get what you want.

[abhibh]

What if he plays a 80 or 100 hz test tone and then set HPF listening to it ? Can that help in setting the HPF appx. to 70-80 hz ?

[abhipuru16]

That is something I had in mind. Start from 65hz, play a 75hz test tone I have and back off just when the tone starts to change.

[abhipuru16]

Okay, today I played a 75hz test tone and adjusted HPF and LPF till the time the tone started to change just a tad bit.
I hope I didn't do anything wrong.

[bullboy]

Congrats Abhi.Some pics are more than welcome.
I'm looking for some good speaker wires and could not find any one selling this in Tvm. is there any online store from where i can get this or some sellers in who can ship .Sorry for hijacking your thread.

[abhipuru16]

Hi
Can anybody here mark 80Hz on low pass and high pass in the knobs below?
Just make a dot using Photoshop or something.