[ST7677]

Image Dynamics IDMAX12D4 v3 - costs 27K
Image Dynamics IDMAX10D4 v3 - costs 25K


I had one question about these subs...
Their recommended power range is 200-1000W RMS.
1. Is it a suitable companion for an Amp with 600W RMS @ 2 ohms?
(Crutchfields suggest keeping AMP and Speaker values as close as possible, where it's fine if amp is more powerful).

2. Let's say I have installed this speaker (with a 600W RMS AMP), what happens when I play it at low volume? Will the sound be distorted below a specific volume (when the speaker is not getting 200W power or volume has nothing to do with power)?

[anToNIcHeN]

Originally Posted by ST7677

I had one question about these subs...
Their recommended power range is 200-1000W RMS.
1. Is it a suitable companion for an Amp with 600W RMS @ 2 ohms?
(Crutchfields suggest keeping AMP and Speaker values as close as possible, where it's fine if amp is more powerful).

2. Let's say I have installed this speaker (with a 600W RMS AMP), what happens when I play it at low volume? Will the sound be distorted below a specific volume (when the speaker is not getting 200W power or volume has nothing to do with power)?

When amp's power is much less than the speaker power, there is a high chance that you might run the amp into clipping at high volumes...
On the long run this would be bad to the speaker!....

With the setup mentioned above, you wont get the sound distorted at low volumes....
regards,
ant.

[navin]

Originally Posted by ST7677

1. Is it a suitable companion for an Amp with 600W RMS @ 2 ohms?
(Crutchfields suggest keeping AMP and Speaker values as close as possible, where it's fine if amp is more powerful).?

dont worry. woofers usually complain like hell when driven beyond their physical limits. so when you hear distortion turn it down.

these watt ratings are thermal. most speakers are more limited by their physical (mchanical) limits. like i have said before 500W at 200Hz is one thing, 500W at 20Hz will make most woofers complain.

[ST7677]

these watt ratings are thermal. most speakers are more limited by their physical (mchanical) limits. like i have said before 500W at 200Hz is one thing, 500W at 20Hz will make most woofers complain.

These Subs have an xmas of 26.5mm so the physical limit is very good.
I am worried that since the Sub is rated at 1000W RMS, using a 600W amp might send clipped signal to it and damage it before it reaches it's physical limit?

[low_bass_makker]

Originally Posted by ST7677

I am worried that since the Sub is rated at 1000W RMS, using a 600W amp might send clipped signal to it and damage it?

no it is not like that.....the 600 watts will not be a continous thing unless u play sine waves and keep pushing the sub for a long time....also when the amp will be clipping so bad it will turn it self off there is a protection circuit there.....

the idmax can be installed in a infinte baffle .....when insatalled that way the 600 watts is more than sufficent as u cannot drvie it to the max when installed in that manner....

if u go for seal then the 1000 watts will make a diff......


last but not the least is ID max avalable in banglore......

[gunbir]

Originally Posted by ST7677

These Subs have an xmas of 26.5mm so the physical limit is very good.
I am worried that since the Sub is rated at 1000W RMS, using a 600W amp might send clipped signal to it and damage it before it reaches it's physical limit?

ST

Lets try this... consider your woofers are tyres, and your amp the engine. Would you damage your tyres (which are rated for 160 kmph max) if you only drive upto 80kmph? No, at least not because of that. If set right, your amp will not go into clipping. You will not damage your sub that way.

The iDMAx is considered unique among super subs because of its efficiency. You dont need huge power to get high music output levels. 600w is good power, and with one iDMax12 you will get way loud. If you have two running off 600w each, God help you and your car.

Have you seen the Image Lancer install? Each iDMax12 runs off 400w in that car and it gets LOUD!

[Bass&Trouble]

Originally Posted by gunbir

ST

Lets try this... consider your woofers are tyres, and your amp the engine. Would you damage your tyres (which are rated for 160 kmph max) if you only drive upto 80kmph? No, at least not because of that. If set right, your amp will not go into clipping. You will not damage your sub that way.

The iDMAx is considered unique among super subs because of its efficiency. You dont need huge power to get high music output levels. 600w is good power, and with one iDMax12 you will get way loud. If you have two running off 600w each, God help you and your car.

Have you seen the Image Lancer install? Each iDMax12 runs off 400w in that car and it gets LOUD!

With no debate whatsoever regarding 600W rms being adequate or inadequate power, the analogy between the tyres and clipping is not very correct.

When clipping, it's more like driving a 160kmph capable tire on some really lousy and bumpy roads. If not the tires, you'll atleast wreck your suspension if you drive it at 80kmph on a road as described.

A 600W rms amp can easily overpower a 1000 watt subwoofer, the important thing like you and Navin both mention, is to not use the power recklessly. Gain matching should be accurate, and if not, one should be careful while listening.

[navin]

Originally Posted by ST7677

These Subs have an xmas of 26.5mm so the physical limit is very good.
I am worried that since the Sub is rated at 1000W RMS, using a 600W amp might send clipped signal to it and damage it before it reaches it's physical limit?

26.5mm is linear one way?

ok even if it is 26.5mm and the subs is super good etc....

lets look at sensitivity. lets assume a sensitivity of 87db/1W/1m. at 200W you are looking at SPLs of 110db!

Are you sure you want to LBM yourself?

[ST7677]

Ok guys,
I am somewhat convincing my self that Audison 4.300 and Audison 1.400 / 2.500 are good amps for me

Audison 4.300 does 4x65W RMS @ 4 ohms with hertz / focal components

Audison 1.400 does 1x350W @ 4ohms (damping factor 200 @ 1khz,4ohms)
1x650W @ 2 ohms and
1x900W @ 1 ohm !!!

I was thinking of a good subwoofer to go with the Audison.

I am not into SPL/showoff, this has to be pure SQ. Though 350W should be sufficient, I think I would still run the amp @ 2 ohms to get 650W RMS max.

Please share your opinions/feedback...

[rsjaurr]

12" ID should be the perfect one in sealed box.

[navin]

Originally Posted by ST7677

Audison 4.300 does 4x65W RMS @ 4 ohms with hertz / focal components
Audison 1.400 does 1x350W @ 4ohms (damping factor 200 @ 1khz,4ohms)
1x650W @ 2 ohms and
I am not into SPL/showoff, this has to be pure SQ. ...

with a decent set of speakers these amps will make you a "SPL/show off".
ebsides the front and rear (Hertz in your case) I'd look at either 2 12" in sealed boxes for the bass. 2 woofers means twice the Sd means have the travel for the same SPL that means distortion can drop by a after of 4 or more (at the voice coil travel gets more non linear distortion really goes up).

[gunbir]

Originally Posted by ST7677

Ok guys,
I am somewhat convincing my self that Audison 4.300 and Audison 1.400 / 2.500 are good amps for me

Audison 4.300 does 4x65W RMS @ 4 ohms with hertz / focal components

Audison 1.400 does 1x350W @ 4ohms (damping factor 200 @ 1khz,4ohms)
1x650W @ 2 ohms and
1x900W @ 1 ohm !!!

I was thinking of a good subwoofer to go with the Audison.

I am not into SPL/showoff, this has to be pure SQ. Though 350W should be sufficient, I think I would still run the amp @ 2 ohms to get 650W RMS max.

Please share your opinions/feedback...

ST

Here is a good setup done recently by Autopsyche in an Accord. I am posting it here to show you a good 5ch is usually enough for a balanced SQ system. iraghava and aZa heard the car. You can ask them to comment on the sound, loudness etc. Also ask them about the SQ of the Hertz HX300D sub. This car gets loud. Maybe all you need is a 5ch amp based setup. Of course, if you like it REALLY loud, you can always go the other way and get 2 amps.

[low_bass_makker]

Originally Posted by navin

Are you sure you want to LBM yourself?

even i am getting new subs for the purpose......

like mentioned below....

1) adire audio -> Brahma 12D4 http://www.adireaudio.com/Mobile/BrahmaSeries.htm

2) adire audio ->Tumult 12D4 http://www.adireaudio.com/Mobile/TumultSeries.htm

3) RE -> XXX 12 dvc version 4ohms http://www.reaudio.com/html/xxx_ts.htm

4) RE -> SX 12 dvc version 4ohms http://www.reaudio.com/html/sx_ts.htm

5) RE -> XXX 18 dvc version 2 ohms http://www.reaudio.com/html/xxx_ts.htm

6) ID -> IDMAX dvc version 4ohms http://www.imagedynamicsusa.com/prod...idmax&type=sub

all of them are high xmax sub starting from..just 26.5mm of IDMAX to the max of 33 mm of the mighty Tumult.....

all the above subs are very good subs which can beat SQ when compared to any other brand or model of subs......

and these are for real LOW_BASS not every body can handle them....

[iraghava]

Originally Posted by gunbir

ST

Here is a good setup done recently by Autopsyche in an Accord. I am posting it here to show you a good 5ch is usually enough for a balanced SQ system. iraghava and aZa heard the car. You can ask them to comment on the sound, loudness etc. Also ask them about the SQ of the Hertz HX300D sub. This car gets loud. Maybe all you need is a 5ch amp based setup. Of course, if you like it REALLY loud, you can always go the other way and get 2 amps.

ST - I had heard the setup last week and it sounded great, Total SQ setup. I think since you want a SQ setup a single-woofer setup would be good enough for you. And it was pretty loud too inside & outside the car, not SPL style loud but Crisp, Clear loudness.

[s0uljah]

Originally Posted by iraghava

it was pretty loud too inside & outside the car, not SPL style loud but Crisp, Clear loudness.

That is lacking in many of the "Fancy/Expensive" setups, more often than not!

Every now and then I meet some dude who would have spent his daddy's hard earned money on ICEing a ride. The end result is such a disgrace because there is no way anyone can sit and enjoy music inside the cabin...forgetabouttheoutside!!!!!

P.S : This thread is turning into a KB ka dB - II