Something Stirs in the Workshop

Dedicated to those large boxes at one end of the room
vinylnvalves
Old Hand
Posts: 1087
Joined: Sat Jan 26, 2013 12:08 pm

#241 Re: Something Stirs in the Workshop

Post by vinylnvalves »

Followed the instructions off Brian Steeles subwoofer site on time alignment, changing to an (MSL)modified square wave input signal without much success. I seem to get too much noise on the bass/mid driver signal to really distinguish the phase and time of the impulse signal. Will have try REW to see if it gives me a different answer. :wink:

I might have call on the services of Dronfield Acoustics……..
brig001
Old Hand
Posts: 562
Joined: Sat Nov 13, 2010 9:56 pm
Location: Back home in Preston now

#242 Re: Something Stirs in the Workshop

Post by brig001 »

Just had another look at the blue trace, and there's a lot of HF there for a sub
Is the brown (?) line the sub or the blue one? There's not much difference time wise, but just to be sure
Did you test with the crossover bypassed?

Sorry for all the questions, but it doesn't look right - then again, I haven't used Holmimpulse

Brian
vinylnvalves
Old Hand
Posts: 1087
Joined: Sat Jan 26, 2013 12:08 pm

#243 Re: Something Stirs in the Workshop

Post by vinylnvalves »

The blue one is the 30hz to 120hz range, it’s a 2nd order LR crossover, not the higher order i mistakenly quoted before. There isn’t any HF output that I can hear. The measurement are all indoor, so the room contributes too.
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