The value of damping factor?

zako
10+ year member

CarAudio.com Elite
Is there any point in looking at amplifier's damping factor specs? I noticed that some Alpine amps are supporting a high damping factor (>500, >1000), at 100Hz with respect to 10watt output. Will this make any difference compared to an amplifier with "only" 100df?

 
In general, manufacturer ratings for amps are pretty pointless. I highly doubt you will notice any difference to the ear, at least if it is your sub stage, between two amplifiers with different dampening factors given other factors are pretty equal.

 
It's more about the partnership of the driver and amplifier, combined with your preference for whatever character of sound you enjoy. Obviously, this would suggest applications in lower-powered SQ setups, but that doesn't mean guys who are wanting to get loud will want it to sound muddy or boomy (which can happen for many reasons, not just lack of damping).

If you're running low Q drivers at a low impedance (1ohm, .5ohm), damping factor won't mean much to you because the driver is already pretty well damped and the impedance magnitude at the driver's resonance will be relatively low and very easy for the amplifier to control. Especially if you're running high power as it helps overcome the back EMF generated by the driver's coil as it moves back and forth.

Now if you're running low-powered setups at somewhat higher impedance, and you're NOT using low Q drivers, you're looking at a situation were an amplifier's damping factor will be very important if you value good transient response and pitch definition. It will pretty much determine how well the driver's cone motion is controlled, even if it's in a sealed enclosure. Done correctly, you will hear 250-500w amplifiers sound MUCH more powerful than they are.

But yeah, high power at low impedance with low Q drivers... you'll be good with anything over a damping factor of 100.

 
I kind of feel amused about all the different opinions that surround some concepts in the audio world. I have done my bit of looking up damping factor, slew rate, inductance, "fast bass", you name it. If you search enough about the topic in audio, you will find highly respected credible people giving opposing opinions. For example, take a look at the posts below.

E.g. damping factor is crap: DIYMA Car Audio Forum - View Single Post - Understanding slew rate and damping factor (from a former JBL employee)

Or here is a post that implicitly implies that damping factor is important: DIYMA Car Audio Forum - View Single Post - Eric Stevens new company?

 
Activity
No one is currently typing a reply...
Old Thread: Please note, there have been no replies in this thread for over 3 years!
Content in this thread may no longer be relevant.
Perhaps it would be better to start a new thread instead.

About this thread

zako

10+ year member
CarAudio.com Elite
Thread starter
zako
Joined
Location
TX
Start date
Participants
Who Replied
Replies
7
Views
1,575
Last reply date
Last reply from
zako
IMG_20260516_193114554_HDR.jpg

sherbanater

    May 16, 2026
  • 0
  • 0
IMG_20260516_192955471_HDR.jpg

sherbanater

    May 16, 2026
  • 0
  • 0

New threads

Top