Welcome, Guest. Please Login or Register
Decware Audio Forums
10/24/14 at 08:57:24


Pages: 1 2 
Send Topic Print
wo or db in convertible? (Read 7835 times)
gexter
Ex Member



Re: wo or db in convertible?
Reply #15 - 10/25/05 at 05:26:31
 
dual voice coil as each coil is 8 Ohms and in parallel total 4 Ohms per driver?  which is how the daytons are rated.

if ( if) your amp is a 4 Ohm amp that will monoblock and drive down to 2 Ohms life is good, really good. you take each driver and wire pos to pos and neg to neg at the driver.  so you have two seperate drivers at 4 Ohms.
now to make it easy to explain. attach  a speaker wire to the neg and the pos on each driver ( not each coil) and run the wires pos and neg to the terminals on the amp that monoblock. that take the 4 Ohm load to 2 Ohms.
YOU HAVE TO KNOW IF IT WILL DRIVE A 2 OHM LOAD!!!! or something may fry.

that is a nice senario but you have to know the capabilities of your stuff.

and I am lousy at explaining this stuff, when I do it its not a problem but to explain it correctly I suck.

Give DD some numbers on what  load your amp can handle and see if it is ( bridgeable/ monoblock) and be sure about your drivers and coils.

Gex

Back to top
 
 
  IP Logged
GRIMM
Ex Member



Re: wo or db in convertible?
Reply #16 - 10/25/05 at 06:46:19
 
HI GUYS, THANKS AGAIN, THE AMP IS BRIDGABLE. IS THIS GOOD? OR NOT GOOD? ALL OF YOUR HELP IS APPRECIATED, AND GEX I THINK YOU EXPLAIN THINGS PRETTY WELL YOU GUYS ARE A BIG HELP
Back to top
 
 
  IP Logged
GRIMM
Ex Member



Re: wo or db in convertible?
Reply #17 - 10/25/05 at 06:56:01
 
HI GUYS, I JUST READ THIS ABOUT THE SUB, DUAL HIGH TEMPERATURE VOICE COIL RUN 2,4 OR 8 OHM  IN MONOBLOCK OR STEREO, I AM NOT SURE EXACTLY WHAT THIS MEANS DOES THIS HELP?
Back to top
 
 
  IP Logged
GRIMM
Ex Member



Re: wo or db in convertible?
Reply #18 - 10/25/05 at 07:44:43
 
hi guys, this is what i found on the amp, the brand is sounxtreme?, i got talked  into it but i  am going to try and make it work, i am hoping the wo will make up for the amp and subs,  thanks for any help,  
1200W x 1 Bridged (4 Ohm)  
PWM MOSFET POWER SUPPLY
BASS & TREBLE CONTROL SEPARATELY
CROSSOVER NETWORK ADJUSTABLE
HIGH SPEED MOSFET OUTPUT DEVICES
CLASS AB
LOW LEVEL INPUTS
Back to top
 
 
  IP Logged
GRIMM
Ex Member



Re: wo or db in convertible?
Reply #19 - 10/25/05 at 08:57:36
 
hey dirtdawg, thanks alot for the info on the top, i di not understand  it, thanks
Back to top
 
 
  IP Logged
DirtDawg
Ex Member



Re: wo or db in convertible?
Reply #20 - 10/25/05 at 10:58:19
 
A little background Copied from CarStereo.com


Dual Voice Coil Subwoofers

Dual voice coil subwoofers are becoming a popular choice among car audio enthusiasts who want more flexibility in wiring their sound systems. While typical subwoofers have a single voice coil, dual voice coil (DVC) subwoofers use two separate voice coils, each with its own connections, mounted on one cylinder, connected to a common cone.

The key difference between single and dual voice coil subwoofers is the multiple wiring options DVC subs offer:
Parallel: A dual 4-ohm voice coil subwoofer with its coils wired in parallel presents a 2-ohm load to your amplifier. Since an amplifier produces more wattage at a lower impedance, the parallel connection ensures you'll get the most output from your amp. In the same fashion, if you have a stereo amplifier and two DVC subs, wire both subs for 2-ohm impedance (one per channel) for maximum output.


Series: Series wiring lets you configure multiple woofers to one amplifier at an acceptable impedance. Wire both coils in series for an 8-ohm impedance, and then wire two 8-ohm subs together in parallel for 4-ohm total impedance (perfect for most 2-channel amps bridged to mono operation). Another example: if you have a high-powered 2-channel amplifier, wire four 8-ohm subs per channel (each channel sees a 2-ohm load).


Independent: You can wire each voice coil to a separate channel of your amplifier, if you prefer not to bridge your amp. Independent wiring is a nice option if you're wiring two DVC subs to a 4-channel amplifier — one voice coil per channel.


A DVC sub offers the same performance whether it's wired in series or parallel. Its power handling levels, frequency response, and other specifications do not change — the only difference is the impedance presented to the amplifier. As a result, you'll use the enclosure that's recommended for your sub, no matter how it's wired.  


Back to top
 
« Last Edit: 10/25/05 at 11:11:52 by DirtDawg »  
  IP Logged
DirtDawg
Ex Member



Re: wo or db in convertible?
Reply #21 - 10/25/05 at 11:02:34
 
Here's a picture




Loads of great info here.


Set your amp to mono mode and connect your speakers like the pic. Keep your cables as short as possible. Enjoy.
Back to top
 
« Last Edit: 10/25/05 at 17:10:55 by DirtDawg »  
  IP Logged
GRIMM
Ex Member



Re: wo or db in convertible?
Reply #22 - 10/25/05 at 14:56:11
 
HI DIRTDAWG, THIS IS VERY VERY HELPFUL, SO WOULD YOU SUGGEDT WIRING LIKE THE EXAMPLE OF THE 4OHM LOAD?, THIS SEEMS PRETTY CLEAR, THANKS AGAIN FOR YOUR HELP
Back to top
 
 
  IP Logged
DirtDawg
Ex Member



Re: wo or db in convertible?
Reply #23 - 10/25/05 at 17:11:59
 
Grin
Back to top
 
 
  IP Logged
GRIMM
Ex Member



Re: wo or db in convertible?
Reply #24 - 10/25/05 at 19:10:02
 
very cool dirtdawg, very cool, it is appreciated, i am looking forward to building the wo, i hope it is as good as everyone says, thanks so much for your halp
Back to top
 
 
  IP Logged
GRIMM
Ex Member



Re: wo or db in convertible?
Reply #25 - 10/25/05 at 21:18:19
 
HI GUYS, I JUST READ THE FRONT OF THE AMP AND IT READ "STABLE AT 2 OHM", GEX YOU HAD SAID THIS WAS GOOD?
Back to top
 
 
  IP Logged
J_Rock
Ex Member



Re: wo or db in convertible?
Reply #26 - 10/26/05 at 21:34:47
 
not so good if your amp is mono.

If your amp has two channels hook up both channels like this:

channel Pos. -----+----+ (positives)
                    (SUBWOOFER1)
channel Neg. -----=----= (negatives)

if its Mono, exactly like the pic Dawg posted, with each main wire going to the + and - labeled "Bridged" on your amp.
Back to top
 
 
  IP Logged
gexter
Ex Member



Re: wo or db in convertible?
Reply #27 - 10/26/05 at 23:01:47
 
SO now we need to know it means it will run 2 Ohms on each channel or the bridged channel.
But the later is unlikely so go for what DD and J-rock are talkin about. You will be safe for sure and your amp will last longer.
Its prob talkin about 1200 watt bridged into 4 Ohms which is exact what they are talkin about.

Where are we at now?

Gex


Back to top
 
 
  IP Logged
jj420
Ex Member



Re: wo or db in convertible?
Reply #28 - 10/27/05 at 01:28:09
 
Id run the amp at 4x300 into 4 ohms, that way youd get the best of both worlds, both coils, and longer amplifier life.  Its a WO so, youll need four channels of amplification to power all four coils.  The coils are 4Ohms apeaice, so youd actually want 4x300 if your amp can do 4 channels, if not, then 2x1200 into a 2Ohm load or 2x300 into an 8Ohm load.  The extended reasoning is below, but the short answer is, go with the 8 ohm load first, if thats not loud enough, then try only wiring one coil on each driver for a 4ohm load as i suggested at first, if thats STILL not loud enough (not likely) then you can rewire the coils to yeild 2 Ohms and run 2x1200 and plan on buying a new amp sooner rather than later, id really hesitate to run the amp into a 2ohm load, even if it says stable, they dont say for how long, and thats likely on a test bench with nitrogen cooling, test tones and vibration dampening, in a car, at 110kph on the highway, its a different story.

Manufacturers are not legally required to post notices of the effects of the different ways you can run them.  Generally, if the amp is rated into 4 ohms, thats where your want to run it to maintain the duty cycle, you could wire the drivers to make 8 ohms, lose a mere 3db and actually extend the life of the amplifier, if its a cheap job, then you might even get improved sound from the increased headroom, as 8ohms would likey be around 400W max output for the amp, but it would run MUCH cooler, this is good, as class a amps run HOT, and AB isnt far behind.  The point is, higher impedance = lower power, except half the power is only 3db less, barely perceptible, anyways lower power = cooler amp, cooler amp = cleaner, longer lived amp.

bridging an amp makes it run double hot, while 2400X1 into 2Ohms would be loud, your amp would likely die off quickly, especially if it was a bargain.  Then theres the added effect of power compression when the coils heat up.  With high power levels, the coils really do get HOT, and when they do that any subsequent power goes to heating them further, not moving the cone.  This is the reason pro subs for SPL class competition use 4 or even eight voicecoils per driver, to get higher output because of cooler coils.

The WO presents the additional effect of controlling the woofer from both sides, like a BP4 box.  This changes the rated power handling of the drivers, as well as the impedance curve, it is an easier box to power, and not "picky" however, you will need a high RMS because of the load presented by the box.  In your case thats not likely to be an issue, unless that amp is grossly overrated...

If you plan on trying the 2400W configuration in your car, then remeber to use 2ga. or lower wire for the power and ground cables, otherwise youll get filaments instead of wires when the bass hits, skinny wires on the power and ground are one of the leading causes of crappy-systemitis, speaker wires dont need to be thick, theres little current, but 2400W would be like HUGE current, read the DC/DC primer at jaycar electronics website to see for yourself.

build on!
(pics)
Back to top
 
 
  IP Logged
jj420
Ex Member



Re: wo or db in convertible?
Reply #29 - 10/27/05 at 01:29:30
 
holy wordy! geez i got carried away....

i guess im too passionate about BASS
Back to top
 
 
  IP Logged
Pages: 1 2 
Send Topic Print