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Old 25th July 2015, 10:56 AM   #1
diyAudio Member
Join Date: Dec 2005
Location: Norway
Default Advice for line source please.

After examined Jim Griffins and John L. Murphys papers, we decided to build a pair of line source consisting of Aurasound NS3 and single Fountec JP3 ribbon tweeter. The tweeter will play / add-in from 10 kHz (+/-).
We have 50 e.a. Aurasound NS3-193-8A (8 ohm).

As I can see it we may have two options:

1) An array consisting of 24 e.a. NS3 wired as 2/2/4/4/6/6 (power tapering)
combined impedance should then be 4,36 ohm with system sensivity 96,5 db.
Pros: Power focused close to tweeter, optimized focus (less blooming)
Cons: Array system sensivity 1,5 higher than tweeter sensivity.

2) The other option is 25 e.a.NS3 wired for even impedance/power as 5/5/5/5/5.
This results in 8 ohm and a system sensivity 93,8 db
Pros: Real line source taking advantage of floor and ceiling ( array is approx. 2 meter high). Bigger sound due to blooming (delay due to different distance from ear to the different drivers)
Cons: Up-in-face sound, sound picture may be bigger than life (?).
(You feel like a fly in a trumpet)

I may for shure be wrong in this opinions/matters and ask for your experience and advice for this line source project. We also have the MiniDSP Dirac engine to play with, but want to make the basic speaker as correct as possible.

Last edited by wilbur-x; 25th July 2015 at 11:02 AM.
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