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Old 18th December 2007, 22:31   #16
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dude, a good VFM option is kenwood 9103d, as "akg7091" mentioned, i had bought thhe same amp from driven for rs 12000. i am running an image dynamics 12" dvc sub and it is also 1 ohm stable and has a power of 900w rms.
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Old 19th December 2007, 19:40   #17
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Originally Posted by nitrous View Post
Can U educate me on why a SVC doesn't need a mono while a DVC shouldn't run from a bridged 2 channel?
Against mono:

http://www.team-bhp.com/forum/ask-gu...tml#post633478

For mono (and for rich people ):

http://www.team-bhp.com/forum/ask-gu...tml#post633731
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Old 19th December 2007, 21:24   #18
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Default DVC shouldnt or DVC neednt?

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Can U educate me on why a SVC doesn't need a mono while a DVC shouldn't run from a bridged 2 channel?
I understand the statement that SVC doesnt need a mono to run. But I cannot understand why a DVC shouldn't run from a bridged 2 channel. The latter sounds like an absolute no-no. Why? I read the posts in B&T's reply, but that doesnt really give a clear answer.

Did that statement really meant -- a mono will do better justice to a DVC or that the bridged channel of a normal amp isnt powerful enough, or something else? I am very confused coz, I am planning to run an IDQ D2V2 from the 190w bridged channel of an SRx4. I tried the same channel on an SVC and it worked like a charm. So the above statement is worrysome. Any expert help?
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Old 19th December 2007, 22:48   #19
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Quote:
Originally Posted by determinus View Post
I understand the statement that SVC doesnt need a mono to run. But I cannot understand why a DVC shouldn't run from a bridged 2 channel. The latter sounds like an absolute no-no. Why? I read the posts in B&T's reply, but that doesnt really give a clear answer.

Did that statement really meant -- a mono will do better justice to a DVC or that the bridged channel of a normal amp isnt powerful enough, or something else? I am very confused coz, I am planning to run an IDQ D2V2 from the 190w bridged channel of an SRx4. I tried the same channel on an SVC and it worked like a charm. So the above statement is worrysome. Any expert help?
The simple reason a SVC (4Ohm) is not suitable with a Monoblock amp, as most mono amps give peak power at 2 Ohms, and a single 4 Ohm subwoofer cannot churn the max potential of that mono amp hence not giving it's full performance.

The answer to your DVC question is, that most DVC subs are Dual 4 Ohms, and there is no way to make a perfect match with a 2/4 Channel amp which on bridged mono mode runs at 4 Ohms and the DVC sub wired in series results in 8 Ohms and wired in parallel results in 2 Ohms.
A DVC sub wired in parallel will heat the amp bridged at 4 Ohms, and in most cases amp will go into heat protect mode.

Am not very sure but the IDQ D2V2 looks like a Dual 2 Ohms sub to me, so that is no problem to run off a 4 channel, as the sub coils can be wired in series and that will result to 4 Ohms which is the exact match with the bridged 4 Ohms channel.

Hope this helps.
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Old 19th December 2007, 23:20   #20
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well i am too in need of a mono block for my pioneer (dvc i guess), its a 900watt champion series woofer, which mono block is recommended at the least possible price, its currently running on my sony 500watt 555model 4-channel amp,completely red in color with the X-shaping, along with the front blaupunkt components connected to the same amp,

for the rear pioneer 420watt coaxials i have conneted the 350watt sony 2-channel amp seperately! i recently purchased the 350watts 2-channel its the latest model! the black and the silver color!

which mono is suggest that costs the least?

Last edited by rider60 : 19th December 2007 at 23:22.
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Old 20th December 2007, 15:45   #21
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Quote:
Originally Posted by blueraven316 View Post
The simple reason a SVC (4Ohm) is not suitable with a Monoblock amp, as most mono amps give peak power at 2 Ohms, and a single 4 Ohm subwoofer cannot churn the max potential of that mono amp hence not giving it's full performance.

The answer to your DVC question is, that most DVC subs are Dual 4 Ohms, and there is no way to make a perfect match with a 2/4 Channel amp which on bridged mono mode runs at 4 Ohms and the DVC sub wired in series results in 8 Ohms and wired in parallel results in 2 Ohms.
A DVC sub wired in parallel will heat the amp bridged at 4 Ohms, and in most cases amp will go into heat protect mode.

Am not very sure but the IDQ D2V2 looks like a Dual 2 Ohms sub to me, so that is no problem to run off a 4 channel, as the sub coils can be wired in series and that will result to 4 Ohms which is the exact match with the bridged 4 Ohms channel.

Hope this helps.
So, if the impedances match there is no issue. Is that right? When I read B&T's and others statements it felt like something else. If only B&T can clear the air on why he said so, it would be perfect.

Yes, the D2V2 is a dual 2 ohm which in series is 4 ohms and works for the bridged channels. If I get a mono, I understand that may not be able the extract the complete juice out of it using the D2V2 sub. May I can get one more of those subs and wire them in parallel (voice coil still in series) to make 2 ohms!

@rider60: Try the Pioneer D510 mono. About 8-9k and 500w RMS, great VFM.

Last edited by determinus : 20th December 2007 at 15:47.
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Old 20th December 2007, 16:33   #22
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Quote:
Originally Posted by determinus View Post
I understand the statement that SVC doesnt need a mono to run. But I cannot understand why a DVC shouldn't run from a bridged 2 channel. The latter sounds like an absolute no-no. Why? I read the posts in B&T's reply, but that doesnt really give a clear answer.
I'm sorry to cause the confusion.

By DVC, I meant commonly available entry level dual 4 ohms subs. These are the most common.

By SVC, I mean single 4 ohm subs. Again, the most common SVCs.

As you have mentioned correctly, it all boils down to the final impedance presented to the amp.

So lets just say that 2-ch amps in bridged mode (ones that cannot run 2 ohms in bridged mode) are good for subs that pose a 4 ohm load, and monos (designed for max output at 2 ohms) are good for subs at 2 ohms.
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Old 21st December 2007, 10:22   #23
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Quote:
Originally Posted by Bass&Trouble View Post
As you have mentioned correctly, it all boils down to the final impedance presented to the amp..
and the amp's ability to manage low impedances with aplomb.
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Old 21st December 2007, 15:20   #24
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So what would actually be a good VFM mono and sub combo ??
[VFM - entry level mono and 4-5k sub]

Last edited by beanstalk_230 : 21st December 2007 at 15:26.
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Old 21st December 2007, 15:24   #25
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Entry level mono would be a JBL CS300.1 as everyone here is recommending.
It puts out around 300W RMS at 2 ohm impedance.
So, a DVC sub that can take 300W rms and the coils are wired in parallel would be best.
I think in JBL, U have the GTO 1204D.
Even Id be interested in a similar combo.
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Old 21st December 2007, 15:42   #26
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apart from jbl do we have any other VFM options available like the one mentioned by akg from kenwood , or any other
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Old 21st December 2007, 15:49   #27
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@Nitrous, your subwoofer is GT4-12 right?

Is it a SVC woofer or a DVC?
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Old 21st December 2007, 15:54   #28
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GT4-12 is a 4 ohm SVC.
I think I will replace it when upgrading.
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Old 21st December 2007, 18:56   #29
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will the pioneer7300 mono block costing around 7500 at my place be good for my DVC 900W champion series subwoofer? or should i buy the jbl's cs301.1 as the cs300.1 is unavaliable as of now?

need urgent help on deceding please people reply asap, as i wont be having time for another 3months to get any one of the monos fixed, after the christmas!

Last edited by rider60 : 21st December 2007 at 18:58.
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Old 21st December 2007, 19:04   #30
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I just googled,rider.
Your Pioneer 12" champion series is a 300W RMS. A pioneer 7300M or the JBL 300.1 is enough.
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