|
High Efficiency Speaker Asylum Need speakers that can rock with just one watt? You found da place. |
For Sale Ads |
Use this form to submit comments directly to the Asylum moderators for this forum. We're particularly interested in truly outstanding posts that might be added to our FAQs.You may also use this form to provide feedback or to call attention to messages that may be in violation of our content rules.
Original Message
RE: What attributes make a driver a good match for a SET?
Posted by tomservo on May 18, 2017 at 05:08:10:
The issue with SET's so far as the driver is concerned is that the bass response and to a degree elsewhere is adversely effected by having a significant "source impedance". That source impedance varies from model to model etc. In that way, the variable impedance can cause issues like it does with text book passive crossovers.
While SS and closed loop tube amps have a low output impedance and so are effectively a Voltage source, the Voltage at the speaker terminals will go up and down with frequency, changing the normal frequency response if there is a significant impedance in series. Where the loudspeaker has a low impedance, that will have reduced output, where there is a bump in the load impedance, there will be a rise in output, compared to Voltage driven.
What your would want then is an efficient speaker with the flattest impedance curve you can find -or- find an efficient speaker, measure it on your amplifier outdoors (no room effects) and eq it flat, then move inside -or- using software, design a conjugating network that tames the impedance while minimizing the sensitivity loss.