You've given out a lot of advice on here which is wrong and beginning to make me question why you're a mod on here, so let me give you the correct information and you can go back to selling your audio equipment. (Yeah I have over 11,000 posts internet wide and I know thats not a good thing to say to mods, but bad information is worse than no information.)

CD's and radio signals are not recorded with 4 channel stereophonic encoding. It is your basic 2 channel signal which your headunit then doubles into a matrixed quadraphonic output. L&R up front and an identical L&R in the rear. Same exact source signal for all channels. There is no time delay or any "surround sound" spacial effect used unless that headunit has a DSP with it's own "quadraphonic" decoding. That is the only way front left and rear left will differ since they use the same source signal.

What biamping would allow me to do is double the power being sent to my component set and let me fade from F to R to adjust the level of the tweeter without having to fiddle with jumpers to lower it down 3db's. I will not have to attend with time delays or other spacial effects because FM and CD signals are only mono or stereo these days.

30-40yrs ago it may have caused me problems if I had a quadraphonic decoder, but since radio signals have reverted back to stereo more than 20yrs ago and no recording companies used more than 2 channels on CD's in the last 20yrs, I will be safe.

Reading material
http://members.cox.net/surround/quaddisc/quadindx.htm
http://en.wikipedia.org/wiki/Quadraphonic
http://en.wikipedia.org/wiki/Compact_Disc
"[I]The technical format of an audio compact disc (Compact Disc Digital Audio

 

Check the post above.

Now back on topic.
I'm big into home audio/theater, but not big on car audio so I'm not familiar with what brands carry what. So besides the Alpine type X's and Polk momo's are there any others you can think of?

After doing more research, I found that SEAS produces car audio equipment. I have some bookshelf speakers on my computer that use SEAS drivers, they're nice. I will probably build a component set using their newest tweeter and the Dayton RS180 woofer. That will allow me to build my own xover and encorporate a zobel network which you typically don't find unless paying 1000.00+ for the set. All in all, I'm looking at spending around 350bucks, assuming the tweeters are around 80.00/ea. Maybe even a bit more depending on what I'll do with the xovers

 

This is a Diagram for you:



a quote from that site in case you don't want to read it... as it is long:
"Figure 1(the above diagram) shows the basic concept in block diagram form. Only one channel of the stereo pair is shown, the remaining channel is identical. Note that the midrange to high frequency crossover retains a passive design - more on this later in the article."

And some reading for you(the complete artical above):

http://sound.westhost.com/bi-amp.htm

I disagree with the way your doing this. Biamping is a great way to get your system louder and I totally agree with you on that. However, your just doing it wrong. You want to use the same channel and then split up that channel not take 2 different channels to make up one.

 

high end eclipse headunits have the abilty to tri amp (front = tweets, rear = mid, non-f = bass)

This is essentally 3 amps to drive one set of three way components. It is a perfectly acceptable way to 'bi amp' speakers.

 

Darknight: First I want to appologize for my rudeness. I normally use more tact than that, but after a long night of parying, my confrontational side tends to show.

I understand what you're saying and you'd be right IF headunits produced true quadraphonic sound, but they don't. Their front channels are identical to their rear channels so long as no DSP is active. It would require some sort of DSP to get the rear channels to play something different than the front channels since the source is stereo and not quadraphonic.

 

So your going to use a DAYTON RS180-4 7" Reference series 4ohm woofer



Nice looking... not my first choice, but good looking anyway for a $33 dollar speaker. It will run ok from a hu power. The frequency range is pretty good. You'll have to cut a little bit of the plastic on the inside of the door panel away so you don't cut up your woofer. You'll need to make a custom plate for them as well.


As for the sound, I can think of a few songs off the top of my head that will sound a little messed up. A few VH songs, a bunch of Tool songs and so on.

I'm not going to stop you from doing whatever you want to do I just disagree that it will sound right all the time. Maybe listening to the radio it will sound ok, I guess. That just not how I would Bi-Amp anything.

 

Looneybomber....

While your post is correct, John is still the one that is correct. Alpine HUs are not recommended for biamping, even by Alpine.

Not only that, even after your whole explanation regarding 2 channel stereo recording, what you is doing is still NOT really biamping. I have never heard anyone who wanted to go through the massive hassle of biamping for a lousy 25WRMS, a number which a $40 amp can do without breaking a sweat.

P.S. I also find it a bit funny that you say you have all this experience, but still need to ask a question, and when you get an answer, you discredit one of the most influential members on this forum. Moreover, none of us here give "general" advice. All our advice here is given SPECIFICALLY for the s2000. In John's opinion, AND mine, what you are doing, for the s2000, is simply, wrong.

 

How is it not biamping? I would be using two different amplifier channels, one on each speaker. I guess in the traditional sence people would be using seperate monoblock amps, but that's because they were spending rediculous amounts on their home audio/theater. The principal is still the same regardless if it's more than one mono amp or more than one channel from a stereo amp is it not?

You question my experience and I will agree with you that I am no expert. When it comes to car audio, I have been out of the scene for so long I no longer know what products companies make, however the theories and physics remain the same from home audio to car audio and in that area I am no n00b.

My original question in this thread was refering to car hardware and who made what. I was neither asking what biamping is nor was I wondering how to apply it in my situation. John simply added in false information about different signals for front and rear channels which is impossible because all FM radio stations and CD's are encoded in stereo, not quadraphonic. The output of each channel could be changed if you had a DSP from Dolby labs or similar, but that is why I have been talking about original sources and not anything DSP enhanced/decoded.

 

wow... this just gets better by the hour....

pretty soon I'll need to appologize... because I have soooooo much to say... but you'll notice I haven't... because I'm myself.

But just so you know this is not Home Theater... this is an S2000, which as you should know is a convertible, whiiiccccch is just about the worst soundstage you can get.

But hey all the power to you. Have fun. I'm just going to watch now and get a tan from basking in all your wisdom.

Dave can pass the SPF 75 sunblock I'm getting cooked...

 

Well...I think this is as far as its gonna go. Nothing useful to add in here. Biamping with a headunit in an s2000 is a waste of time. Like I said, a $40 amp will sound a lot better. We dont advise people to cut corners, and this is definetely cutting corners. There are proven ways, and they are the ONLY ways of getting better sound in an s2000, and for the sake of new members, we like to keep our information pretty linear and consistant. On that note, if you decide you would like to upgrade your stereo the proper way, feel free to start another thread with equipment advice, whatever, but as far as this goes, I wish you the best of luck, but it's as far as it's gonna go here.