General Discussion General discussion about all things car audio, from pioneer, orion, alpine and eclipse.

Speaker Frequencies

Old 04-19-2007, 02:50 PM
  #2  
2000 Watt CAFz'r
 
maltesechicken's Avatar
 
Join Date: Jan 2001
Posts: 2,025
22khz is more than enough considering the human ear can only hear up to 20khz. You don't need to look nearly that high. 18khz is perfectly fine, there is no music that reaches that high, so you still have lots of head room.

As for the low end, if you have subs, you won't need your speakers to play lower than 80 hz (depending on where you set you sub crossover, you can go higher than that, or lower: 80-100hz is a good crossover setting.

When a speaker has a high-pass crossover, it means that the bass notes won't make it to the speaker. High pass means - the high notes bass through while the low notes are blocked. So you will have high-pass crossovers for your speakers and low pass cross overs for your subs.

Most amps also have these crossovers built-in. When your speaker has that, it simply means that regardless of what amp you connect it to, it won't allow bass notes to get through (probably 6 or 12 db / octave).
maltesechicken is offline  
Old 04-20-2007, 12:14 AM
  #4  
2000 Watt CAFz'r
iTrader: (11)
 
BigRedGuy's Avatar
 
Join Date: Nov 2000
Posts: 2,383
Talking

My personal rule of thumb is you can run a decent quality set of 6X9s with up to twice their rated power as long as you cut off the low frequencies (below 80hz or so).

2 channel amps with that much real power are fairly pricy...... RF, MTX, Alpine, Orion, Kicker and others all make good quality 4 channel amps in the 35 to 50 w/per channel range that will give you plenty of power bridged to 2 channels.

HTH
BigRedGuy is offline  
Old 04-20-2007, 09:10 AM
  #5  
2000 Watt CAFz'r
 
maltesechicken's Avatar
 
Join Date: Jan 2001
Posts: 2,025
Originally Posted by DaGGeR_2007
alright that makes alot of sense.

When your looking for an amp to run a set of 6x9's @ 4 ohms that each have an RMS wattage of 75W, could u get an amp that runs 75 x 2 @ 4 ohms, or 150 x 1 @ 4 ohms? or would both work
The 75 x 2 is fine, but as was mentioned, you can give a quality pair of 6 x 9 more than their RMS, (I personally wouldn't double the power though - I'd go to 100wrms x 2)

The 150 x 1 @ 4 ohms isn't what it looks like. You will be looking for 150 x 1 @ 2 ohms. When you combine two 4 ohm speakers it will create a 2 ohm load final.

So with the 150 x 1 @ 4ohms, if that is a stereo amp bridged into one channel, loading it down to 2 ohms will smoke the amp.
If is is a mono amp, it could produce as much as 300wrms x 1 @ 2ohms, so each speaker will see 150 watts each - which for BigRedGuy would be the double power that he is looking for.

Your assumption that when 2 speakers run off 1 channel while share the wattage is correct.
maltesechicken is offline  
Old 04-20-2007, 11:16 PM
  #6  
2000 Watt CAFz'r
iTrader: (11)
 
BigRedGuy's Avatar
 
Join Date: Nov 2000
Posts: 2,383
Lightbulb

Originally Posted by maltesechicken
The 75 x 2 is fine, but as was mentioned, you can give a quality pair of 6 x 9 more than their RMS, (I personally wouldn't double the power though - I'd go to 100wrms x 2)

If is is a mono amp, it could produce as much as 300wrms x 1 @ 2ohms, so each speaker will see 150 watts each - which for BigRedGuy would be the double power that he is looking for.

Your assumption that when 2 speakers run off 1 channel while share the wattage is correct.
Problem is he's asking about 6X9s.....if he uses a mono amp there's going to be another issue....

Stick with multi-channel amps for your mids and highs. Mono amps could be wired up to run your system in stereo, but it's more work and most mono amps these days are better suited to run subs.

Anybody else besides me remember the big purple Orion NT mono-blocks?....

Ahhh....the good old days...
BigRedGuy is offline  
Old 04-20-2007, 11:36 PM
  #7  
0 Watt CAFz'r
 
J_Ferguson's Avatar
 
Join Date: Dec 2006
Posts: 4
Thumbs up

Originally Posted by BigRedGuy
Problem is he's asking about 6X9s.....if he uses a mono amp there's going to be another issue....

Stick with multi-channel amps for your mids and highs. Mono amps could be wired up to run your system in stereo, but it's more work and most mono amps these days are better suited to run subs.

Anybody else besides me remember the big purple Orion NT mono-blocks?....

Ahhh....the good old days...
^^x2 and yes was a real killer brother had 2 in his car
what he didn't do for in gas....
made up for it in shock waves
J_Ferguson is offline  
Old 04-22-2007, 11:57 PM
  #8  
2000 Watt CAFz'r
iTrader: (11)
 
BigRedGuy's Avatar
 
Join Date: Nov 2000
Posts: 2,383
Thumbs up

Originally Posted by J_Ferguson
^^x2 and yes was a real killer brother had 2 in his car
what he didn't do for in gas....
made up for it in shock waves
For a 100watt amp, they were amazing.....

Saw a car many years ago with 3 of them, one for each front channel and the third running a single 15....the sound was great and it was the first time I saw someone use neon in an amp rack. The amps were recessed in individual white boxes behind plexi and the visual effect was

It's a darn shame nobody makes purple marble amps anymore.....
BigRedGuy is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
sens9000
General Discussion
1
01-13-2007 06:04 PM
frankydudy
General Discussion
1
11-19-2006 09:01 PM
13idnyk
General SPL
26
03-21-2005 10:31 PM
exxtractor
Install related
12
08-16-2004 11:52 AM
PEI330Ci
General SQ
23
02-20-2004 08:37 AM


Thread Tools
Search this Thread
Quick Reply: Speaker Frequencies


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.