Sub in mono or two way ?
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
Sub in mono or two way ?
I have two 8" JBL GTO subs getting power from a 2x150 watt Jensen amp in 2-channel mode.
Is it better to have the subs powered in mono mode?
The reason I ask is that I want to replace the Jensen with a real amp
Is it better to have the subs powered in mono mode?
The reason I ask is that I want to replace the Jensen with a real amp
Racer
Joined: May 2008
Posts: 421
Likes: 0
From: Mooresville NC
Mono is better. Lp or low pass will only have bass coming out two way or full has music and bass which can destroy a sub. Pretty sure I said that right been awhile since I have had to deal with that. I was reading and when I saw jensen I was going to tell you to get a real amp. But that one would be sufficient to power some mid range speakers.
Thread Starter
Race Director
Joined: Feb 1999
Posts: 12,772
Likes: 17
From: Indianapolis IN
The Jensen will be history.
So now the question is,,,,,,,,,, do I buy one mono amp to run both speakers?
What type of wattage should I need, the RMS on the JBL's is 150watts.
So now the question is,,,,,,,,,, do I buy one mono amp to run both speakers?
What type of wattage should I need, the RMS on the JBL's is 150watts.
Racer
Joined: May 2008
Posts: 421
Likes: 0
From: Mooresville NC
You gonna sell the Jensen? I need a amp to power my mids. I would say a class d mono. You really only need a good 500 watt rms amp. I have had great success with hifonics. Depends on how much sound you are looking for.
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Melting Slicks
Joined: Mar 2004
Posts: 2,149
Likes: 6
From: NCCO Oklahoma
Spkrboy is a HIGHLY respected member in the audio section. He has probably forgotten more about audio than most people here have ever known. Just letting you know right up front before you try and argue with him, or say anything that you might later regret...
Anyway...
A speaker (Sub, woofer, mid, or tweeter) has what is known as an impedance curve. The impedance changes with frequency, so you have a 'nominal' number that best represents the 'average' impedance of the driver. (4 ohm load, 8 ohm load, etc...)
For a sub, you can quickly see that the impedance increases with frequency... so any highs being sent to the driver will have little to no impact on it. Asking a sub to reproduce midrange would sound like crap... but I don't see a reason why you can't do it.
The worst that I can think of what would happen is that the driver wouldn't be able to move fast enough due to the driver mass vs. electromotive force being driven into the voice coil. You might end up heating the voice coil a bit, but if your amp and sub are sized properly it shouldn't hurt the sub or the amp.
As for the level of Spkrboy's knowledge base, I suggest you take a look at these threads as an example:
http://forums.corvetteforum.com/show....php?t=1830571
http://forums.corvetteforum.com/show....php?t=2014008
Best regards,
Mark
Pro
Joined: May 2007
Posts: 744
Likes: 0
From: WayTooCloseToNY Northeast PA
Thanks, Mark and Penta.
Mono or stereo really doesn't matter except where you're interested in maximizing the output of whatever amps you're looking at. A low-pass active crossover either in-line or built into the amp is a must for good sound.
Mono or stereo really doesn't matter except where you're interested in maximizing the output of whatever amps you're looking at. A low-pass active crossover either in-line or built into the amp is a must for good sound.