21 replies to this topic

[skitzo4bass]

if a SVC sub had a ratinf of 400rms and a DVC had a rating of 250rms would there be much difference between them?

SVC:
1,000 Watts Max. Power Handling
400 Watts Nominal Rating
Qts = 0.42
Xmax = 8.7mm
Fs = 32.6 Hz
Vas = 55.6 litres
Frequency Response 18 ~ 500 Hz.
Efficiency 89 dB
Impedance 4 Ohm
f0 (Lowest Resonant Frequency) 31 Hz.

DVC:
Impedance 2-Ohm x 2
Power Handling 250 RMS
500 Peak
Motor Size 60 oz. double stacked
Voice Coil Diameter 2" aluminum
Speaker Connector Dual 8 AWG compression
Mounting Depth 6.125"
Rec. Sealed Enclosure 0.85 cu. ft.
24.07 liters
Rec. Vented Enclosure 1.75 cu. ft.
49.56 liters
Tuning Frequency (vented) 37 Hz


just curious cause i wouldn't mind changing later as in far far away lol not much cash

and just to let you all know that they would be in the same design bow and tuned to there best performance, which one would be the better choice and better quality?

cheers

Skitzo4bass

Edited by skitzo4bass, 23 June 2006 - 04:31 PM.

[Bodyjar]

Yeah... the DVC sub can only handle 250rms, vs the SVC handling 400rms...

Going by the limited info... the SVC would be better, but very hard to tell...

[Kev]

Liquidity, on Jun 23 2006, 06:37 AM, said:

and wired up the DVC in series to produce a 4ohm load, they would sound *Exactly* the same.

Well *technically* they could be *slightly* different. The way you run it (series or parallel) also has an impact. Whether or not your Godly enough to hear it or not is a matter of debate but there is a difference.

But yeah good advice for OP

[ProClass]

There are many factors to consider when suggesting DVC Vs SVC

First of all, the speakers T/S params change depending on how you wire them and as such the sound would be different. How different? {I'm not going to go thier} But they will be different.

To me the one and only reason for DVC speakers is to allow flexibility in impedance load configuration.

One being better than the other? ..... Depends on the speaker, your set up ... etc etc

More detailed information is needed and time to model each design to offer any real opinion of one being better than the other.
Cheers

[Bassaholic]

Both woofers are of different models, so it isn't a case of SVC vs DVC.

But as the others have said, the only real advantage of dual voice coils is the flexibility which allows you to use several different impedance configurations.

(there is actually another cool thing you can do with DVCs, but I don't normally recommend it, so I won't go into it here....)

As far as series vs parallel goes, well there will be differences due to the amplifier, wiring resistance..... But in reality, unless you are using a questionable amplifer and wiring with too much resistance, there won't be much real world differences.

[trism]

no, please post for us simple folk lol

[Brycestro]

Does the cool trick involve a vending machine? I was in the target lunch room today and was thinking how useful it would be to be able to pump a sub up inside it to rattle all the chocolate and chips out.

[Bassaholic]

It has been briefly mentioned before, I know others have discussed this on various internet forums before, so...

Ok, I'll give you guys a few hints.
What happens to the Qes if you hook just one of the coils up to an amplifier?
(Or other parameters, you may want to consider BL and I if you prefer.)

What happens if you hook up just one of the coils to an amplifier and short out the coil that is not hooked up? (by shorting out the other coil, I mean just a short bit of wire from the +'ve to the -'ve terminal of the coil that is not hooked up to anything). (Consider the Qes and Qms)

(also remember that by only hooking up one coil, the power handling will decrease..)

What happens to the parameters of a single voice coil woofer if there is additional resistance wired in series?

(of course, it wouldn't be very practical to do that for the purpose of deliberately adjusting the specifications because the current in the circuit will be reduced and the resistor will need to dissipate a large amount of power..)

Knowing all that, what would be the trick?

Edited by Bassaholic, 26 June 2006 - 11:08 PM.

[Kev]

Bassaholic, on Jun 25 2006, 04:07 PM, said:

What happens if you hook up just one of the coils to an amplifier and short out the coil that is not hooked up? (by shorting out the other coil, I mean just a short bit of wire from the +'ve to the -'ve terminal of the coil that is not hooked up to anything).

Dammit just tell us I've done that but I don't recall their being a huge difference... I supose you can get either get more power? It sounds better? Or it runs at a different impedance? Otherwise.... whats the point??

[Brycestro]

Yeah... i'm dying to know whether or not it lets you rumble the twix bar out of the candy machine or not.

[ProClass]

Well…..
By only connecting one coil you will have added mass to the cone.
This will lower Fs and yes alter a number of other T/S parameters including BL.
Other than lowering Fs the purpose of doing this doesn’t make much sense to me. A glob of silicone on the dust cap would achieve the same thing and my speaker would still be firing on all pistons.
The little piece of wire? Got me. Open or Closed the un-connected voice coil is not in circuit and wouldn’t play any electrical role.
hmmm