Audio Systems: need the rite advice, dual voice coil, rms power

Question
its a sony explode cdx-gt31w  i was gonna wire it like so +to+ and -to- from sub to amp?
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-----Question-----
If you can feed L + R sub mono into the amp and then drive amp in the bridged mode with the speaker coils in series you will get the best sound quality not sure what you mean by mono? send me a diagram of some sort so i can understand sorry im kinda new to this kind of wiring style thank you for your time
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-----Question-----
well iv'e asked several persons on line about wiring one 4ohm dual voice coil sub to a two-channel amp which is bridgable some say you cant do it some say you can do it. this what i have tell me if these two can work togather i have a 12inch lanzar heritage 4ohm dual voice coil sub which is 2000 watts max/1000watts RMS and a fahrenheit class x clx 940-2 amps specs are bridged 1400 watt max/RMS@4ohms 220x2/RMS@2ohms 340x2/mono 700 watts.and cant get anymore info on amp because its a (discontinued model). was told to wire it bridged in parrellel? whats the correct way to hook both for best out of the two units.
-----Answer-----
First, let me explain there is no such thing as RMS power; it is a misnomer.  RMS applies to voltage and current, but not power.  When you have sine wave current in a resistive load (which is the way amplifiers are tested) it produces average power by textbook definition.  Don't know why the marketing people continue to misuse the term, but they do.

Secondly: there are several ways you can hook it up: One amp to each voice coil or bridge the amp and connect to the voice coils in series or parallel.  Best way is for the sound quality and performance that you think is best; in other words, try all the combinations and see which one you like.

It will depend to some extent how you have your system configured. If you can feed L + R sub mono into the amp and then drive amp in the bridged mode with the speaker coils in series you will get the best sound quality - in my opinion.

If you drive the amp with dual mono inputs and keep the amp outputs separate and drive each amp into one coil you will get about the same performance as above.

Since the amp is not rated for 2 ohms when bridged you better stay away from bridged amp with coils in parallel.

That is my opinion.  But, let me if you have any further questions whatsoever.

C

PS:  There is no problem if the speaker load is HIGHER in impedance than rated, but if you go lower it can damage the amplifier when driven to extreme.  I prefer to have the amp loaded just a little light rather than heavy.


-----Answer-----
You don't really need a diagram.  Stereo is just a two channel signal; L for left channel and R for right channel.  You head end unit has outputs to feed the amp.  They are usually L and R.  But, some of them provide a subwoofer output which is either mono (L + R) OR stereo.  So, you must know the specifications of the head unit that is driving the sub amp.

If you can give me the stereo head unit you are using to drive the sub I can look up the specifications and let you know what outputs they offer.

OR:  Even if the head unit does not have a mono output you can combine them with a combining cable available at any electronics store.

It really is a simple matter.

C


Answer
Go to:

http://esupport.sony.com/US/perl/model-documents.pl?mdl=CDXGT31W

and click on the installations/connections option for some ideas of hookup.

You can also download the owners manual from the same page.

The outputs on the rear are switchable for sub woofer connection.  See page 14 and 15 or your manual.

So, you must go from the sub outputs on the Sony to the inputs on your subamp and from the subamp to the speaker coils.

See Figure 2A of the connections page.

Good luck,
C