What's "moderate" level for monitor run-in?

Brian Middleton · 8th September 2006, 03:36 AM

I just picked up a pair of Dynaudio BM6 passives. The manual says to run them in by setting them up face to face out of phase and playing "MEDIUM LEVEL" music in mono for 12 hours. How would you define "medium level" for this purpose? Around 80 dB SPL, C-weighted sound OK?

tINY · 8th September 2006, 09:08 AM

Um, you won't measure 80dB SPL when they are facing each other and out of phase, untill you run a lot of power into them....

I'd run them at about 1-5W rms. Just make sure they are moving. The spider and the surround change in the first few hours of use.

-tINY

Brian Middleton · 8th September 2006, 01:15 PM

Quote:

Originally Posted by tINY

[font=comic sans ms][color=indigo]

Um, you won't measure 80dB SPL when they are facing each other and out of phase, untill you run a lot of power into them....

Well of course I didn't measure the dB when they were already facing each other and out of phase! I measured it when they were in their normal position, and then left the monitor level there when I put them face to face.

Quote:

I'd run them at about 1-5W rms.

Just out of curiosity, how would one measure this?

tINY · 8th September 2006, 07:01 PM

Use a "true RMS" DVM across the speaker terminals and divide that voltage squared by the speaker impedance.

...for ballpark numbers, lets use 8 ohms

V^2 / 8 = 2W

V^2 = 16

V = 4v RMS

...at 80dB SPL I doubt you were running even half a watt into them.

-tINY

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8th September 2006, 03:36 AM	#1
Brian Middleton Gear addict Join Date: Jun 2003 Location: Dorchester, Mass., USA Posts: 332	What's "moderate" level for monitor run-in? I just picked up a pair of Dynaudio BM6 passives. The manual says to run them in by setting them up face to face out of phase and playing "MEDIUM LEVEL" music in mono for 12 hours. How would you define "medium level" for this purpose? Around 80 dB SPL, C-weighted sound OK?

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8th September 2006, 09:08 AM	#2
tINY Lives for gear Join Date: Jul 2004 Location: Orygun Posts: 6,017	Um, you won't measure 80dB SPL when they are facing each other and out of phase, untill you run a lot of power into them.... I'd run them at about 1-5W rms. Just make sure they are moving. The spider and the surround change in the first few hours of use. -tINY

8th September 2006, 07:01 PM	#4
tINY Lives for gear Join Date: Jul 2004 Location: Orygun Posts: 6,017	Use a "true RMS" DVM across the speaker terminals and divide that voltage squared by the speaker impedance. ...for ballpark numbers, lets use 8 ohms V^2 / 8 = 2W V^2 = 16 V = 4v RMS ...at 80dB SPL I doubt you were running even half a watt into them. -tINY