Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

amp and speaker matching...HELP!!!!
amp and speaker matching...HELP!!!!
amp and speaker matching...HELP!!!! 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
Thread Tools Search this Thread
Old 15th February 2002, 07:19 AM   #1
dcase69 is offline dcase69
diyAudio Member
Join Date: Feb 2002
Default amp and speaker matching...HELP!!!!

Im new to this and need some help. I have 4 6x9's and am looking for an amp to power them. They have a max power of 260w each, but a nominal power of 60w. Am I supposed to get an amp that handles the 240w or one that handles the 1040w? Thanks
  Reply With Quote
Old 15th February 2002, 12:48 PM   #2
GRollins is offline GRollins  United States
diyAudio Member
Join Date: Feb 2001
Location: Columbia, SC
There are few things that are as misunderstood as power as it relates to speaker reliability.
It's not wattage that kills speakers, it's clipping. One way to look at it is to visualize a clipped signal as switched DC. Speakers are air-cooled devices. Dynamic drivers cool their voice coils by pumping air in and out through the spider (sometimes augmented by vented pole pieces). If a driver is fed a DC signal, it goes full transit and sits there. The voice coil is heating up, but there's no air moving so the voice coil doesn't cool. The speaker fries rather quickly.
Someone will jump in at this point and say that heat is conducted away via the magnet structure. A relatively small percentage is but, fancy "heatsinks" on the magnets not withstanding, ceramics just aren't that good at conducting heat. The heat that makes it up the pole piece is of some help, though.
You can run a speaker with more than its rated power forever...with a few caveats.
--The first and biggest is that the signal is flat. If you start jacking things around with tone controls, all bets are off. You can exceed Xmax and physically damage the driver. Don't bother asking how much power you can use if you use tone controls. There are approximately one googleplex of variables involved, and I ain't gonna start guessing how loud you play vs. how much boost vs. what frequencies are involved vs. the ambient temperature in a car (which effects cooling of the voice coil), etc. etc. etc.
--Without damaging the driver, you can still exceed the linear excursion. This increases distortion. How much this bothers you depends on how careful a listener you are.
--We're assuming that the drivers are made by reputable companies and are of at least average construction quality.
The upshot is that if you play fair and don't use tone controls you can exceeed the rated power by a considerable margin. I used to run 15W speakers with over 100W of amplification and never had a problem.
For people looking for a simplistic guideline: match RMS power on the amp to RMS ratings on the speaker.

  Reply With Quote


amp and speaker matching...HELP!!!!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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Speaker matching transformer. GK Tubes / Valves 5 13th October 2008 12:51 AM
speaker-matching transformers: can I install them beside each other? jarthel Parts 1 25th October 2006 01:00 AM
Matching speaker sensitivities Khron Multi-Way 9 2nd August 2005 01:56 PM
Matching Speaker Characteristics squidbait Multi-Way 3 9th January 2004 08:31 AM
SOZ Speaker Matching Cephas Pass Labs 2 25th August 2002 03:42 PM

New To Site? Need Help?

All times are GMT. The time now is 09:38 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio