What amplifer are you talking about turnbrown? Some amps will have something like DF >400 at 20hz, I have seen some say DF > 300 20hz - 20khz @ 8Ohm. Use the Excel spreadsheet from Benchmark and input the numbers from your speakers. What Benchmark was showing is speakers that range from 2.6 Ohm to 18 Ohm DF of >200 was .1dB difference. Some like Pass use a low DF which produces higher dB in the Bass depending on speakers used.
Damping Factor - Interesting article
Benchmark Media published interesting article on Damping Factor. I already knew that it does not make much difference for the damping of the membrane, but low output impedance is necessary to drive changing impedance ot the speaker (ideal voltage source). According to this article DF=100 produces about 0.5dB variations typically, while DF=200 reduces it to 0.1dB. DF above 200 is inaudible.
https://benchmarkmedia.com/blogs/application_notes/audio-myth-damping-factor-isnt-much-of-a-factor?omnisendAttributionID=email_campaign_5eda3b728a48f72deaf34bf2&omnisendContactID=5cf9266b15b61cc5a2a4dee7&utm_campaign=campaign%3A+AUDIO+MYTH+-+%22DAMPING+FACTOR+ISN%27T+MUCH+OF+A+FACTOR%22+%285eda3b728a48f72deaf34bf2%29&utm_medium=email&utm_source=omnisend
https://benchmarkmedia.com/blogs/application_notes/audio-myth-damping-factor-isnt-much-of-a-factor?omnisendAttributionID=email_campaign_5eda3b728a48f72deaf34bf2&omnisendContactID=5cf9266b15b61cc5a2a4dee7&utm_campaign=campaign%3A+AUDIO+MYTH+-+%22DAMPING+FACTOR+ISN%27T+MUCH+OF+A+FACTOR%22+%285eda3b728a48f72deaf34bf2%29&utm_medium=email&utm_source=omnisend
Showing 5 responses by djones51
In the Benchmark paper it says most amplifier specs assume 8 Ohm whether that's true for Hegel and marantz I have no idea. What's interesting to me about the article is they are saying low DF of 10 or high as 10,000 is not an issue damping of driver motion but a low DF can affect the sound of speakers because of variations in impedance of the speaker. I notice the Hegel integrateds show a DF of 4000, I can't imagine a speaker bad enough to for the DF to matter at 4000. |
Here is an older paper I found that explains the DF relationship between amp and speaker. It was a little easier for me to understand some of the numbers. https://butleraudio.com/damping2.php |
According to Pass the SIT-1 damping factor doesn’t change with frequency. The Cube is a single driver speaker, looking at the standard vertical scale at 50dB there’s a lot of axial variation from 20 -300 hz, below 100hz it looks a little strange. It’s probably bumping the bass below 100hz and above 10khz with distortion and then rolling off at about 15khz. Looks like it would sound good paired with the SIT-1 not sure DF would have anything to do with it. The frequency and phase response is flat, distortion |
I posted this link on the Class D thread. A few questions into the interview Bruno Putzey talks about DF. Does the high damping factor of class D amplifiers negatively affect the subjective sound quality of some types of speakers https://audiophilestyle.com/ca/bits-and-bytes/purifi-audio-and-the-audiophile-style-readers-qa-with-... |