fryman

Its a Fenix and it says 600w on it and 2x4 ohms.I tried looking up information about the woofer but couldn't find anything,not even a website.So what I'm wondering is:

1.Is it 600w max or 600w RMS?

2.What does the ohms mean?

3.As you can see in the picture it has 2 separate audio inputs on each side of the woofer.Why is this?

swx1042

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fryman &raquo;</TD></TR><TR><TD CLASS="quote">Its a Fenix and it says 600w on it and 2x4 ohms.I tried looking up information about the woofer but couldn't find anything,not even a website.So what I'm wondering is:

1.Is it 600w max or 600w RMS?

2.What does the ohms mean?

3.As you can see in the picture it has 2 separate audio inputs on each side of the woofer.Why is this?</TD></TR></TABLE>

hey man, i don't know a whole lot about audio, but i can tell you that ohms is a measurement of the resistance that you present to your amplifier.

the sub has two sets of inputs because it is a dual voice coil model. it allows for a little bit more flexibility in wiring the speaker to your amplifier.

2x4dvc probably means that each voice coil is 4ohms. you can wire it in parallel which would present a 2ohm load or in a series which would present an 8ohm load.

Not sure about what the RMS is for that. Two likely specs could be 300 watts rms with 150 on each coil, or 600 rms with 300 on each coil.

fcm

It's a made in China product and my guess is with a cast basket, vented pole piece and being a DVC 4 ohm, it is 600W RMS and probably 1200 Max.
You may be able to find out more here... http://www.chinafuturesound.com/ or contact them... http://www.chinafuturesound.com/contactus.htm 94

fryman

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by swx1042 &raquo;</TD></TR><TR><TD CLASS="quote">

hey man, i don't know a whole lot about audio, but i can tell you that ohms is a measurement of the resistance that you present to your amplifier.

the sub has two sets of inputs because it is a dual voice coil model. it allows for a little bit more flexibility in wiring the speaker to your amplifier.

2x4dvc probably means that each voice coil is 4ohms. you can wire it in parallel which would present a 2ohm load or in a series which would present an 8ohm load.

Not sure about what the RMS is for that. Two likely specs could be 300 watts rms with 150 on each coil, or 600 rms with 300 on each coil.</TD></TR></TABLE>
So the less ohms the better?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fcm &raquo;</TD></TR><TR><TD CLASS="quote">It's a made in China product and my guess is with a cast basket, vented pole piece and being a DVC 4 ohm, it is 600W RMS and probably 1200 Max.
You may be able to find out more here... http://www.chinafuturesound.com/ or contact them... http://www.chinafuturesound.com/contactus.htm 94</TD></TR></TABLE>
Wow you found their website....I couldn't even find a picture of their logo on google.Yea I'll check their site out.Thanks!

fcm

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fryman &raquo;</TD></TR><TR><TD CLASS="quote">So the less ohms the better? </TD></TR></TABLE> Not necessarily, on some amps when you halve the impedance of the load the amp will double it's RMS output, EG; a 1x500W RMS into 4 ohms amp will be a 1x1000W RMS into 2 ohms amp, or a 1x250W RMS into 8 ohms.
This is not true of all amps, amps with "regulated" power supplies will make the same wattage at 2 ohms as it does at 4 ohms.
The lower the impedance the less "stable" the amp is, amps will not be stable at all below a set impedance, EG; a 2x100W RMS into 4 ohm amp will be 2x200W RMS into 2 ohms and when bridged it will be 1x200W RMS into 4 ohms but connecting a 2 ohm speaker, [a DVC 4 ohm wired in parallel] to it will over-heat the amp as it is not stable below 4 ohms.
For best possible SQ out of the sub, and assuming it is a 600W continuous, [RMS] sub I would look for a 1x1200W RMS into 4 ohms amp, wire the subs VCs in series for an 8 ohm load and the amp will make 1x600W RMS into 8 ohms.
You will need to find out if the 600W is continuous, [RMS] or max power, at the same time find out box recommendations or the T/S, [Thiele/Small] parameters for the sub. 94

fryman

To tell you the truth I didn't understand half of what you said .Basically what your saying is that if theres a amp thats 2x100w 4 ohm and you connect a 8 ohm woofer ,the amp will produce 2x200w?

fcm

You have that backwards, if you have an amp that is 2x100W RMS into 4 ohms and you connected 8 ohm speakers to it it would be a 2x50W RMS amp, conversely if you connect 2 ohm speakers to it, then it would be a 2x200W RMS amp.
When you halve load, [4ohm to 2ohm or 8ohm to 4ohm or 2ohm to 1ohm] the amps wattage will double, the reverse is also true, if you double the load, [4ohms to 8ohms and so on] the amps output is halved.

A few things to keep in mind, the above is not true of all amps, amps with "regulated" power supplies produce the same wattage no matter what the load is, within limits, [1.5ohms to 4 ohms] all amps have a lower load limit.

I will use the 2x100W amp as an example, it will be 2x100W into 4 ohms and 2x200W into 2 ohms or 1x200W, [bridged/mono] into 4 ohms but will not be stable below 4 ohms when bridged into mono.

It is very important to match the amp to the sub, your DVC sub will be 600W RMS, [assuming that is the correct wattage] whether you wire the VCs in series, [8ohm load] or parallel, [2ohm load]
As mentioned for best SQ it is best that you find an amp that will make 1x600W-700W continuous, [a little overpowered is a good thing] into 8ohms.
Although SQ will suffer a little, [not a biggie with sub bass] an amp that makes 1x600W-700W continuous into 2ohms will also work. 94

fryman

Ok now I understand.I have an Alpine Bridgeable Power Amplifier 3549 2x100w RMS.Do you know how much ohms this amp is and if the watts will double if the woofer connected 2 it is half the ohms?Also it says 100WX2(RMS),4(and then this symbol that looks like a horse shoe).Is that the ohms?Sorry for all the questions...I'm not very experienced with car audio.

fcm

Your amp, [very old school] is 2x100W RMS into 4 ohms or 2x200W RMS into 2 ohms or 1x200W RMS into 4 ohms it is not stable below 4 ohms when bridged into mono.
You could leave it in the 2ch mode and connect each channel to one of the VCs on the sub, sub will get 200W of RMS power, however that is way underpowered for that sub.
Yes the "symbol that looks like a horse shoe" is the symbol for ohms. 94

fryman

Wait but the woofer is 2x4 ohms...so doesn't that mean that each VC is 2 ohms each so if I connect each channel to each of the VCs then the amp would be giving the woofer 400w?2x200w x 2 VC=2 ohms each?

fcm

Your sub is a DVC 4 ohm, it has two 4 ohm VCs, you can wire them in series and get an 8 ohm final load, or you can wire them in parallel and end up with a 2 ohm load.
If you wire the VCs together, [parallel or series] you will need to bridge the amp into mono, [one channel] the amp is not stable below 4 ohms when bridged so you could only wire the VCs in series, [8 ohms] but that would cut the amps wattage by 50%, 1x200W rms into 4 ohms = 1x100W RMS into 8 ohms.

For you to get the most wattage out of that amp you will need to leave it in two channel mode, [2x100W RMS into 4 ohms] and wire one VC to each channel, the sub will get 200W RMS, 100W to each VC. 94

fryman

Oh ok I see.I'm just gunna see if I can get another one of these woofers and a amp like you suggested.If I cant find another woofer like this,since its a 600w RMS woofer it would sound pretty good by itself in a single woofer box of the right size right?