Horiz/Vert Biamping

Look to Marchland and Bryston!

They both make outboard XO's.

There is alot of dispute about this,but it is very beneficial once you understand it and what is going on.

Recently there was an article in a mag about it and it's what professionals are going to.

Like I said once you understan it,it is easier to see the Bene's of it.

Monoblocks for each channel and bridging are different .This setup is better and is different than that.Less distortion,crosstalk,more efficient for the amps to drive the speakers.

I will try to explian it again later if you wish.The XO is then connected to the amp .Has nothing to do with how many inputs there are on the preamp.

It will defeat alot of the problems of room synergy because it allow for the XO to be tailored to whatever is best to accomidate the drivers to the room.Thus it is sort of like tone controls ,but better.

Did I explain that so you can understand it?

I am more confused as ever. Abex writes, "Horizontal to me is using an amp for the High\Mid Drivers for both channels and one for the Bass drivers for each channel, ..." In his case, one amp drives the top freqs and one amp drives the bottom freqs. How does the true meaning of the word, horizontal, apply to this configuration at all?

Does not horizontal imply a distinction between left and right; it has nothing to do with going up or down. Where was Mr. Spock when we needed logic to define what otherwise would be so simple.

Anyway, silly semantics aside, are there any members here who have tried dedicated amps for each channel vs dedicated amps for the top and bottom frequency ranges? And what were the sonic benefits of each .... if any significance existed at all?

I have tried to explain this a few ways,but I'll try one more time.

3 Types of Amplification!
Horizontal Amping--Does not require Monoblocks
Vertical Amping--Need Monoblocks
Bi-Amping

Horizontal means you can use 1 amp to drive the woofers in both channels and another amp to drive the Tweeters in both channles and another amp to drive the Mid Drivers in both channels.So you have 3 amps driving particular drivers in both channels.

Most speakers that allow to use seperate amps that are 3-way speakers only have a 2 sets of binding post which means they combine driving the Mids\Tweeters as one.Which in turn means you would have :
One amp for the L\R Channel Mid\Tweeters
One amp for the L\R Channel Woofers
That is Horizontal Amping because you are using the amps to drive the same drivers in L\R Cahnnels and even if you are able to use another amp to drive that set of Tweeters in both channels by adding another amp you are still Horizontally driving the speakers

Then you can get a 3-way Outboard crossover unit which allows for using a seperate amp to drive each driver.This is Vertical amping.
So lets start with the Left Channel in a 3-way speaker using Monoblocks:You would need 3 sets of Monoblocks
1 amp for the left channel Tweeter
1 amp for the left channel Mid Driver
1 amp for the Left Channel Woofer Driver
For the Right Channel
1 amp for the right channel Tweeter
1 amp for the right channel Mid Driver
1 amp for the right Channel Woofer Driver

Bi-amping is just adding power and nothing more.It is not really advantageous from any other point of veiw.Horizontal and Vertical amping helps with efficientcy .Verical being the most advantageous because it is using a Dedicated amp for each driver.It also allows for less crosstalk and less distortion from occuring.

Here are examples of Crossovers
http://www.marchandelec.com/
http://www.bryston.ca/crossel.html

Another way of explaining it.Maybe this will be better.

Horizontal
Vertical
Bi-Amping

Horizontal--2way speakers
Is sharing the amps between both channels
You have 2 amps to share to drive the Tweeters and Woofers
1 amp to the Mid\Tweeters for both Channels
1 amp to drive the Woofers for Both Channels

Horizontal for 3ways
You could have the tweeters,Mids and woofers being driven by 1 amp in both channels for sets of drivers it would still mean you are Horizontaly driving the speakers,but most speakers only come with 2 sets of binding post and do not allow to adjust levels so you are either have Horizontaly or Bi-amping capability.

Vertical Amping
Is usually done with an outboard XO which has many advantages ehich I will get to.Heres how it is setup.
For 3-ways speaker systems you'd need 3 sets of Monoblocks.
1 amp for each driver therefore you have 1 amp for each individual driver.They are looped between the driver to the outboard XO the XO is hooked into the L\R Inputs of the preamp.
1-amp L. Ch. Tweeter Driver
1-amp R. Ch. Tweeter Driver
1-amp L. Ch. Midrange Driver
1-amp R. Ch. Midrange Driver
1-amp L. Ch. Woofer Driver
1-amp R. Ch. Woofer Driver

Hench you have dedicated amps for each driver.The Benefits of this are as follows:
Less Crosstalk
Less Distortion
More Efficientcy for amps to drive the speakers
Ability to adjust output levels of the Drivers which allows for better speaker to room interaction.

Bi-Amping has no value other than more power.

I hope that explains it! 8)

Here are examples of Crossovers
http://www.marchandelec.com/
http://www.bryston.ca/crossel.html

Just to follow that up .It usually takes an ACTIVE OUTBOARD XO to get Vertical amping.Some speaker manfs. do have internal ACTIVE XO's I think.

Active Crossovers are prefered because you can adjust levels and you would have to have the capability to adjust levels using different amps.