Thanks all. Really.
The concern is how do you determine what amount of power is appropriate in advance?
And or, at what point should you become concerned with an amps power rating, if you know the speakers numbers, placement, and distance to the LP ?
As I understand it, on paper, a 91db sensitive speaker should develop 91db SPL at one meter (about 40 inches) with one full watt without room reinforcement.
At 2M with one watt the same speaker SPL halves so power must double. Add one more meter, and at 3m the power must double again to yield the same SPL developed at one meter.
Thus… at 3M a 91db sens speaker needs 4 watts. At one set freq. more if most of the bandwidth is being engaged.
Yes? No?
In my own case, the LP should never be more than 10 – 12 feet away from the front baffles.
My guess is 200wpc is plenty for generating aforementioned SPLs. Even a 120wpc amp would work for that matter. I think.
Every speaker I’ve looked into with interest have sens of 88db or higher. Most are 89 – 91db.
Using an older Radio Shak digital spl meter on speakers of 93db from a distance of 9ft from their baffles setting the meter to average peaks, a 93 to 96DB range was enormously loud. Irritatingly loud IMO. Maybe one song only kind of loud if I felt the need to Pour Some sugar on it, or dig a Whole Lot Of Rosie! Once.
So clipping looks like the bigger deal. That and providing the speakers enough power to keep the drivers on pace firmly.
Amps I’m liking a lot in no real order are Gryphon coliseum ypsalon Alieus, Constellation Imagine series, PSA BHK monos, Bermister (not the biggest one) BAT 655, and Master Sound classic
I might well be worrying about nothing. Although at these prices worry seems a necessary evil.
The concern is how do you determine what amount of power is appropriate in advance?
And or, at what point should you become concerned with an amps power rating, if you know the speakers numbers, placement, and distance to the LP ?
As I understand it, on paper, a 91db sensitive speaker should develop 91db SPL at one meter (about 40 inches) with one full watt without room reinforcement.
At 2M with one watt the same speaker SPL halves so power must double. Add one more meter, and at 3m the power must double again to yield the same SPL developed at one meter.
Thus… at 3M a 91db sens speaker needs 4 watts. At one set freq. more if most of the bandwidth is being engaged.
Yes? No?
In my own case, the LP should never be more than 10 – 12 feet away from the front baffles.
My guess is 200wpc is plenty for generating aforementioned SPLs. Even a 120wpc amp would work for that matter. I think.
Every speaker I’ve looked into with interest have sens of 88db or higher. Most are 89 – 91db.
Using an older Radio Shak digital spl meter on speakers of 93db from a distance of 9ft from their baffles setting the meter to average peaks, a 93 to 96DB range was enormously loud. Irritatingly loud IMO. Maybe one song only kind of loud if I felt the need to Pour Some sugar on it, or dig a Whole Lot Of Rosie! Once.
So clipping looks like the bigger deal. That and providing the speakers enough power to keep the drivers on pace firmly.
Amps I’m liking a lot in no real order are Gryphon coliseum ypsalon Alieus, Constellation Imagine series, PSA BHK monos, Bermister (not the biggest one) BAT 655, and Master Sound classic
I might well be worrying about nothing. Although at these prices worry seems a necessary evil.