most bass without a sub?
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Joined: May 2001
Posts: 2,121
Likes: 3
From: Indian Land SC
Highest Xmax you can find and dynamat the doors.
Sorry I don't have any specific driver recommendations, but when you're shopping ask for the "X-max" specification for the woofer. It will be listed in the driver specs along with a bunch of other "T-S" parameters. This is one spec that has more influence on bass reproduction than many people realize.
It's a number, usually in millimeters, that indicates the maximum one-way excursion (in-and-out travel) for the speaker cone. Good, loud bass production requires a lot of air movement, and there are only 2 ways to do that - either a large surface area for the speaker cone (bigger drivers or more of them) or you need to move that cone farther (Xmax). For each octave lower you want to go in bass repoduction you need 4 times the speaker excursion to produce the same sound output. This means that it takes 4 times the cone excursion to produce 100 Hz at 100 dB as it does to produce 200 Hz at 100 dB. And if you are after 50 Hz (and you should be), it takes 16 times the excursion compared to 200 Hz. Many speakers simply run out of excursion capability long before they reach maximum operating power, and that severly limits bass output.
Expensive subs will often have Xmax ratings of 15mm or higher, but you can't put those in the doors and they don't reproduce the midrange worth a crap so you wouldn't want to. For a 6.5 woofer, I would try to find drivers with at least 3mm Xmax rating and the lowest resonant frequency (called Fs) you can find. For Fs, expect numbers between 50 and 60 Hz. Higher than 60 Hz - find another driver.
Sorry I don't have any specific driver recommendations, but when you're shopping ask for the "X-max" specification for the woofer. It will be listed in the driver specs along with a bunch of other "T-S" parameters. This is one spec that has more influence on bass reproduction than many people realize.
It's a number, usually in millimeters, that indicates the maximum one-way excursion (in-and-out travel) for the speaker cone. Good, loud bass production requires a lot of air movement, and there are only 2 ways to do that - either a large surface area for the speaker cone (bigger drivers or more of them) or you need to move that cone farther (Xmax). For each octave lower you want to go in bass repoduction you need 4 times the speaker excursion to produce the same sound output. This means that it takes 4 times the cone excursion to produce 100 Hz at 100 dB as it does to produce 200 Hz at 100 dB. And if you are after 50 Hz (and you should be), it takes 16 times the excursion compared to 200 Hz. Many speakers simply run out of excursion capability long before they reach maximum operating power, and that severly limits bass output.
Expensive subs will often have Xmax ratings of 15mm or higher, but you can't put those in the doors and they don't reproduce the midrange worth a crap so you wouldn't want to. For a 6.5 woofer, I would try to find drivers with at least 3mm Xmax rating and the lowest resonant frequency (called Fs) you can find. For Fs, expect numbers between 50 and 60 Hz. Higher than 60 Hz - find another driver.
Thread Starter
Registered User
Joined: Jun 2002
Posts: 3,505
Likes: 1
From: New Port Richey
thank you 
I know what to look for now in the speakers.
With an aftermarket hu, putting out say 30w rms per channel, would it greatly benefit me to be running an amp to the components AND the rear 5.25s? If I do run an amp to the fronts, do I HAVE to replace the speaker wire, or is it just highly recommended? Ive searched and found mixed answers...
I know what to look for now in the speakers.
With an aftermarket hu, putting out say 30w rms per channel, would it greatly benefit me to be running an amp to the components AND the rear 5.25s? If I do run an amp to the fronts, do I HAVE to replace the speaker wire, or is it just highly recommended? Ive searched and found mixed answers...
Registered User
Joined: Oct 2000
Posts: 4,686
Likes: 0
From: Richmond, VA
get an aftermarket 4-channel amp to run all four speakers. you have better control of the gain and therefore better efficiency at powering the speakers.
imho, you get better sound quality from an amp too.
the lower gauge the wire, the better. i'd recommend it (pita for the fronts).
imho, you get better sound quality from an amp too.
the lower gauge the wire, the better. i'd recommend it (pita for the fronts).
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