Roms SQ Diary

[roms]

Theoretically you can but the thing is the combined slope would be like -30db/oct, and that would introduce strange phase changes. If your amp had -24db/oct slopes, then I would have suggested to use the amp's crossover, but here using the HU's crossover will give you better control over phase change and resulting in better blending of midbass and subwoofer with bass upfront feeling.

To be specific, i was referring to mixed order. Right so as per your suggestion i set the LPF to 120 and same for mid bass on high pass. The sub became too much musical and the mid bass was taken away from ps.

Shall i select full from SS or leave it on HPF with everything in anti clock wise position.

[roms]

Theoretically you can but the thing is the combined slope would be like -30db/oct, and that would introduce strange phase changes. If your amp had -24db/oct slopes, then I would have suggested to use the amp's crossover, but here using the HU's crossover will give you better control over phase change and resulting in better blending of midbass and subwoofer with bass upfront feeling.

Sir i am just trying to understand the basics of cross overs.
I know the first order you are mentioning is widely used because some unwanted frequencies are passed from it and no change in phase and amplitude happens. But my fear is that wont it damage the mid bass if it goes below the fs of the driver and will interfere over a wide frequency range and may cause response shifts off-axis.. I am referring to ps not the sub.

[Adnanhks]

Roms.. I am using 2450BT with complete crossover setup and Woofer two amplifiers. In order to get mid bass.. from crossovers you need to check the option Loud - if you notice on Low the mid bass would be very less plus also the woofer response.. On Mid you'll feel an instant boost on Mid bass from your crossovers. You don't need to play with the amplifier. make sure all amplifier output is set to HPF and just set gains to an optimum level till you don't feel any clipping.. rest all headunit has functions to set the sound.. !

[roms]

Roms.. I am using 2450BT with complete crossover setup and Woofer two amplifiers. In order to get mid bass.. from crossovers you need to check the option Loud - if you notice on Low the mid bass would be very less plus also the woofer response.. On Mid you'll feel an instant boost on Mid bass from your crossovers. You don't need to play with the amplifier. make sure all amplifier output is set to HPF and just set gains to an optimum level till you don't feel any clipping.. rest all headunit has functions to set the sound.. !

Thanks for your response bro, my question is about slopes. Not the mid bass. stay tuned and the things will be much clear after sq gurus responses

[mughal90]

To be specific, i was referring to mixed order. Right so as per your suggestion i set the LPF to 120 and same for mid bass on high pass. The sub became too much musical and the mid bass was taken away from ps.

Shall i select full from SS or leave it on HPF with everything in anti clock wise position.

Keep everything as it is, just change from HPF to FULL.

[DrShaggy]

Sir i am just trying to understand the basics of cross overs.
I know the first order you are mentioning is widely used because some unwanted frequencies are passed from it and no change in phase and amplitude happens. But my fear is that wont it damage the mid bass if it goes below the fs of the driver and will interfere over a wide frequency range and may cause response shifts off-axis.. I am referring to ps not the sub.

Sir, -12db/oct is a 2nd order crossover, not first, -6db is and with that you will have to cut them even higer. If you cut your PS at 120hz @ -12db, the output at Fs region (60hz-ish) will be very low to cause any damage or anything like that to PS. But that causes you to cut your sub at a higher frequency which as per you say, makes it more musical and dominating over the midbass, the correct description would be that the sub becomes easily localised at that point. 80hz and below, sub bass is not localisable.
Thats the advantage that dedicated DSPs have that you can select higher order or steeper slopes and cut your mids and subs lower, thus making the soundstage solid in front. Bypass all the crossovers from your amp (set it to full or off whichever is available) and then use your HU's crossover till you get your hands on something with more tuning options You know what I am refering to, dont you ?

[roms]

Sir, -12db/oct is a 2nd order crossover, not first, -6db is and with that you will have to cut them even higer. If you cut your PS at 120hz @ -12db, the output at Fs region (60hz-ish) will be very low to cause any damage or anything like that to PS. But that causes you to cut your sub at a higher frequency which as per you say, makes it more musical and dominating over the midbass, the correct description would be that the sub becomes easily localised at that point. 80hz and below, sub bass is not localisable.
Thats the advantage that dedicated DSPs have that you can select higher order or steeper slopes and cut your mids and subs lower, thus making the soundstage solid in front. Bypass all the crossovers from your amp (set it to full or off whichever is available) and then use your HU's crossover till you get your hands on something with more tuning options You know what I am refering to, dont you ?

Hmmmmmmmmm. Thank you dr sb for your kind reply. My problem solution lies with the same as you directed yesterday.

But cutting ps at 120hz takes the crunch of 70s and 80s hz away. so i have to do something now

[roms]

Two more questions.
I have set the cross over point for ps at 120hz as you suggested, so the -12db per octave brings the slope to the 60ish hz or fs of the ps. Can't we use the same inverse of HPF to LPF for sub. I mean why don't we cut the sub at 63hz so with a -12db octave and the slope goes down to 126 hz. Will there be too much dip at cross over point, and what will be the net peak at slopes intersection of LPF and HPF.

2ndly there will be a peaky response of 3db at 120hz if the HPF and LPF are set at this point (with -12db per octave). will the system still be balanced.

Reference

[roms]

Update:
As the slopes I was mentioning, I were experimenting it because on paper it was too confusing, so I tried the following cut off points and WOW the focals came back to life and staging went upfront in the wind screen. Time aligned the drivers by ears and the results were very very brilliant.
I used the following slopes.
The cut off for sub is at 63hz with -12db per octave. I don’t have software to plot this graph but it will be something like this.
The slope will be -12db down at 126hz
The slope will be -6db down at 94.5hz
The slope will be -3db down at 78.75hz

The cut off point for ps is at 100hz with -18db per octave.
The slope will be -18db down at 50hz
The slope will be -9db down at 75hz
It also means it will be -11.52db down at 67hz (fs).

So the comparative effect of LPF and HPF points won’t be peaky and dippy either.

[blacklist1]

SQ'ing hope it gets better and better

[roms]

SQ'ing hope it gets better and better

Indeed it will
what about ur pre upgrade

[blacklist1]

Indeed it will
what about ur pre upgrade

On its way bro ..
..

Bus ek hath ate ate reh gai 8650mp

[Talhadon]

On its way bro ..
..

Bus ek hath ate ate reh gai 8650mp

Wahh shehzadey
Jaldi jaldi aja wapis.....I want to clear wax from my ears

[usman421]

bro bohat alla stuff ap videos b upload kro

[roms]

On its way bro ..
..

Bus ek hath ate ate reh gai 8650mp

What was its price roughly

Wahh shehzadey
Jaldi jaldi aja wapis.....I want to clear wax from my ears

U didn't tell me talha about .....

bro bohat alla stuff ap videos b upload kro

Thank u usman bhai, video bannai tu sirf mein he nazar aaon ga uss main

[blacklist1]

What was its price roughly

about 17-18k

[roms]

Guys i need suggestions for mono amp and sub. Please give your input. I have already asked all senior members regarding it and they have given great opinions. So before i proceed, i want to summarize everything here in the thread.
Requirement is a sql sub not more than 12 " and single.

[usman421]

Thank u usman bhai, video bannai tu sirf mein he nazar aaon ga uss main

yh to or b achi baat hay ap bhi ho gy n system b:)

[tilsim]

mushkil mushkil baatein ho rahi hein aaj kal sb threads pe.. apni to samajh se uper hi hien..

[roms]

mushkil mushkil baatein ho rahi hein aaj kal sb threads pe.. apni to samajh se uper hi hien..

Usman bhai i am coming soon