I'm Glad you are closer to your sound goal (Is there a pun in there?)
anyhow, the other thing I like is the "plug" you built for the original woofer hole AND you craftsmanship! 😀
anyhow, the other thing I like is the "plug" you built for the original woofer hole AND you craftsmanship! 😀
Thanks for your kind words.
I suffer from OCD (obsessive compulsive disorder) which helps the craftmanship, but can take ages.
You'd roll around the floor in laughter watching me put a woofer in.
Tighten the screws. Are they tight? Let's check again. They look OK........ just one more check. *phone rings and answer a call* After the call........ I wonder if I tightened those screws? Let's check. I wonder if I wired it correctly? Let's pull them out and have a look. The cycle starts again..........ah crap!
15 minutes later....... I wonder if those woofer screws are tightened?
The simpler the task, the harder it is, the more complex a task, the easier it is..... go figure.
I suffer from OCD (obsessive compulsive disorder) which helps the craftmanship, but can take ages.
You'd roll around the floor in laughter watching me put a woofer in.
Tighten the screws. Are they tight? Let's check again. They look OK........ just one more check. *phone rings and answer a call* After the call........ I wonder if I tightened those screws? Let's check. I wonder if I wired it correctly? Let's pull them out and have a look. The cycle starts again..........ah crap!
15 minutes later....... I wonder if those woofer screws are tightened?
The simpler the task, the harder it is, the more complex a task, the easier it is..... go figure.
According to this detailed article, it creates more problems than it's worth.
http://sound.westhost.com/ptd.htm
http://sound.westhost.com/ptd.htm
Phase software....
There are definate rewards to aligning the drivers. However i have noticed that the room reflections must be tamed to have the full benifit.
I have noticed that besides the enlarged soundstage instruments also sound more natural without extra "harmonics/distortion"
Can someone point me to a software source for something to simulate the effects of the delayed responce caused by the crossover.
Als the drivers themselves have their own time lag with frequency. I imagine these can also be plugged into a program that can calculate it from the inductance and R?
Bye.
There are definate rewards to aligning the drivers. However i have noticed that the room reflections must be tamed to have the full benifit.
I have noticed that besides the enlarged soundstage instruments also sound more natural without extra "harmonics/distortion"
Can someone point me to a software source for something to simulate the effects of the delayed responce caused by the crossover.
Als the drivers themselves have their own time lag with frequency. I imagine these can also be plugged into a program that can calculate it from the inductance and R?
Bye.
Eton said:
I've seen that article before and is quite interesting.
He still concludes that time alignment is beneficial. Diffractions are a problem with a stepped baffle, but could be minimised, a sloping baffle is not true time alignment and neither is the method I have chosen with inverted drivers.
1st order crossovers need to have nearly zero driver horizontal offset to obtain their benefits and not have great dips or peaks at the crossover frequency. The modification I have done is to minimise the problem that occurs at the crossover frequency where you can have response variations of 10dB due to driver offset. I think this is too large and needed improvment. My frequency response would still go up and down all over the place due to the room, drivers but would not now be compounded by the crossover dip.
I've noticed manufacturers such as Mission, Kef and Dynaudio are using this method.
On the OCD
try carrying around a little notepad and making a list of the stuff you have already done, and pull the notepad out and refer to it when you wonder if you've done stuff.
I don't have OCD, but it seems to me like such a solution would work.
try carrying around a little notepad and making a list of the stuff you have already done, and pull the notepad out and refer to it when you wonder if you've done stuff.
I don't have OCD, but it seems to me like such a solution would work.
OMG ! now that someone has explained to me "by example" (see one of my posts this forum) I would say that I to suffer from OCD also, as I take years to get things done, and keep rechecking my work (well, that is what the wife tells me all the time, about the years to finish things, but the rechecking, yes that's me...)
Go Figure, Ok, I'll need to check the calculations on that
No really !
Go Figure, Ok, I'll need to check the calculations on that
No really !
Thanks for the tip BAM.
Do have a plan when building things and cross off as I go and tried things like notepads. The doc & psychologist tell me I have to control it outright and say to myself, "enough you idiot", and not transfer it to another ritual. I started writing notes on my hands and arms and was ending up like Guy Pearce in "Memento"...... not a good look and bloody hard to get off. But I can build a computer and not think twice about it.
Good entertaintment value for the family though.
Do have a plan when building things and cross off as I go and tried things like notepads. The doc & psychologist tell me I have to control it outright and say to myself, "enough you idiot", and not transfer it to another ritual. I started writing notes on my hands and arms and was ending up like Guy Pearce in "Memento"...... not a good look and bloody hard to get off. But I can build a computer and not think twice about it.
Good entertaintment value for the family though.
Would the cat in my picture, since he's doing the same movement over and over be sufferning for OCD as well 
Coolin:
you can download a free Lattice network calculator/time delay here. it's in DOS.
http://www.hal-pc.org/~bwhitejr/
you can download a free Lattice network calculator/time delay here. it's in DOS.
http://www.hal-pc.org/~bwhitejr/
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