Series Crossovers: "reactively balanced"? - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 26th March 2010, 08:47 AM   #1
clm811 is offline clm811  United States
diyAudio Member
 
clm811's Avatar
 
Join Date: May 2002
Location: Northern California
Question Series Crossovers: "reactively balanced"?

I've been toying with the idea of a system balanced from input to output, and experimenting with balancing a crossover network in order to try shielded twin lead loudspeaker cables (I live in a high-RF area).

While reading some old literature from Fried Loudspeakers I came across these statements regarding their choice of the series crossover topology:

Quote:
{Series Crossover} provides several advantages listed below:

Balanced reactively providing a purely resistive load to the amplifier, which allows greater power transfer at critical dynamic moments.

Impedance curve is flat rather than having large peaks at the crossover frequency that are reactive and destroy transient response.

Drivers stay in phase providing sharper leading edges to transient sound as they are connected to each other forcing them to work in unison.

Active impedance of the speaker drivers at the crossover frequency is stabilized so that power is shared more predicatively{sic} between speaker drivers.

Actual measurements registered a 6dB increase in dynamic range when comparing series to parallel networks in the same system
I know that marketing print is full of hyperbole, but...

Does anyone have experience/opinions on the veracity of these statements?

-Chas
  Reply With Quote
Old 26th March 2010, 01:13 PM   #2
Spatz is offline Spatz  Germany
diyAudio Member
 
Join Date: Jan 2008
Location: Hamburg
The so called "advantages" are mostly not true:

A purely resistive load would mean a flat impedance curve. Serial XOs, balanced or unbalanced don't have a flat impedance curve. You can work with RCL and RC filters to get an resistive load, but for non-tube amplifiers, this is mostly unnecessary.

The phase of the driver is further influenced by the position of the driver and its filtering. As soon as you filter a driver, the phase changes... If you want drivers to be in phase, you have to work with electrical or mechanical delays.

The increase in dynamic range is the biggest lie, how can a woofer move four times more air in a certain frequency range just by having a different XO?

Bye,

Spatz
  Reply With Quote
Old 26th March 2010, 09:48 PM   #3
diyAudio Member
 
Join Date: Apr 2006
Location: Tn
You might find it interesting to read through this thread.

http://thecarversite.com/yetanotherf...g=posts&t=2124

Primarily a review of a book that dives into this topic.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
600 ohm resistor between "+" and "-" of balanced inputs. skpb Analog Line Level 3 20th October 2006 12:38 PM


New To Site? Need Help?

All times are GMT. The time now is 10:42 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2