Infinity active low x-over impedance matching question.

[Franklin]

Hi,

The active low x-over input of Infinity's RS-1B system has an impedance matching circuit, with a few switch settings to match the electronic crossover unit to the input impedance of the mid-high power amp. The system consists of two mid-high screens and two woofer columns which have the electronic servo x-over. The mid-high screens have a passive x-over.
The input circuit is shown on the x-over image. Mind you, this is a twenty-two year old system.

Is the impedance matching still necessary, because I don't see it being used in todays active x-overs. If necessary, can it be simplified in terms of components or replaced by another more suitable circuit?

Thanks for any advice.

Franklin

 

[Franklin]

Is there really noone who can reply to my question??

 

[Nelson Pass]

OK

I say it's not necessary.



Get rid of the switch networks and adjust the 5.1 nF
value for the input impedance of the amp and the
crossover frequency you want.

2 * 3.14 * freq = 1 / (resistance * farads )

Apparently the original was crossed at 150 Hz or so
with 5 nF and 200 Kohm

 

[gromanswe]

I am the VIKING of north LAND

Is there really noone who can reply to my question??

So,
I guess I am the Exception
you long for
HIM but you
see
ME
this "VIKING"
of his
CROSS
my fingers
I will tell no one!
-

-
fotenote:
(for non believers)
http://www.songlyrics.co.nz/lyrics/b/beatles/whilemyguitar.htm
he went away, too soon
he belongs to my HEART even so

 

[mrfeedback]

Dealing With Idiots

Mr Gromanswe,
I am of Viking blood myself.
Yes, Eric the Viking of the Great Southern Land.
You do your countrymen a great disservice by continually posting rubbish such as yours.
If I were a Swede, I would be ashamed to say so in your company.
Other members here come to read and share audio information, and your idiotic posts are a plain PITA.

SO, CUT THE CRAP OR GO AWAY AND ANNOY A DIFFERENT FORUM ON THE NET - THERE ARE PLENTY FOR YOU TO CHOOSE FROM - PERHAPS GO TO SOME CONSPIRACY THEORY, OR FREE ENERGY, OR UFO, OR MENTAL HEALTH SELF HELP FORUM.
PERHAPS YOU CAN FIND ONE WHERE YOU ARE IN LIKE COMPANY.

Any backups to have this fruitcake banned from this forum ?.

 

[gromanswe]

Re: Dealing With Idiots

Mr Gromanswe,
I am of Viking blood myself.
Yes, Eric the Viking of the Great Southern Land.
You do your countrymen a great disservice by continually posting rubbish such as yours.
If I were a Swede, I would be ashamed to say so in your company.
Other members here come to read and share audio information, and your idiotic posts are a plain PITA.

SO, CUT THE CRAP OR GO AWAY AND ANNOY A DIFFERENT FORUM ON THE NET - THERE ARE PLENTY FOR YOU TO CHOOSE FROM - PERHAPS GO TO SOME CONSPIRACY THEORY, OR FREE ENERGY, OR UFO, OR MENTAL HEALTH SELF HELP FORUM.
PERHAPS YOU CAN FIND ONE WHERE YOU ARE IN LIKE COMPANY.

Any backups to have this fruitcake banned from this forum ?.

Can you QUOTE
some rubbish of mine!
-
-
I might be able to SORT you OUT

go have a prayer to YOUR god
I believe in
My GOD
(he died for me)
and for you
my friend

gro

 

[Peter Daniel]

Re: Dealing With Idiots

Any backups to have this fruitcake banned from this forum ?.

I am really surprised that no one backed MrFeedback yet. When it came to complain about Harry the outrage was widespread, but when somebody is really useless to this Forum nobody really complains. Is it because you don't care or is it because you can't comprehend the message he sends?

Although I usually don't complain, the behaviour of gromanswe is one big joke and distraction for others trying to benefit from tis place.

MrFeedback I'm backing you second time today.

 

[Franklin]

Nelson,

Thanks for your reply.
I'll give it a go.

Franklin

 

[Samuel Jayaraj]

Gromanswe,

Your last post seems to suggest that you are a (believing) christian! However, your behaviour on this forum is quite unbecoming of one.

 

[gromanswe]

ThANKS FOR notising me, Samuel J.

Gromanswe,

Your last post seems to suggest that you are a (believing) christian! However, your behaviour on this forum is quite unbecoming of one.

J Christ's Behavior was Not to Comfortable
to HIS ENEMIES
So He was KILLED,

and Blame is on you and I and ME
"GUILT BY ASSOCIATION"
for something done 2002 years ago.
For in thoughts, acts and WORDS
nonone of us can say he is perfect.

So the few % I have made ANGRY and ENENMIOUS
at this Forum, I ask and beg FORGIVENESS from.
Some will give/get others will NOT GIVE/GET -
In the END it tells more about yourself, what you say
And your reaction towards me, Tells me
What you THINK! - You might think this my post OVER!

 

[dice45]

Eric,

Any backups to have this fruitcake banned from this forum ?.

methinks you're right. And Peter Daniel too. However, better guard your tongue! Do you think offensive language makes it better? It makes it worse!

 

[mrfeedback]

For The Tenth Time.

Hi Bernard, is fruitcake offensive ?.
My Great aunt used to bake a very nice fruitcake, and date loaf too.
Mr Groman, If we want this to be DIY bible lessons be assured that we will consult you first.
Until then please desist the preaching.
If you listen, you are sure to glean that the majority here are peaceable, and really do not need the evangelical sermons.

Perhaps do a little study of alternate religous fixed belief systems.
The Egyptian Book Of The Dead, or The Tibetan Book Of The Dead are good starters, even Islam in the pure form and also hypnotism.
This may open your mind some.

Please stay to the subjects, and if you have relevant stuff say it, and if not relevant zip it.

"I ask and beg FORGIVENESS" - Stick to the above and it will be.

Eric.

 

[Peter Daniel]

I don't know if you noticed, but just recently Mr. Groman's posts became quite entertaining. Actually I started to enjoy them.

 

[trigon]

Mr. Groman has listened music with mono amp and he is not only one person that did this, I listened my CDs on two mono amps and as well at the same time.

Yap, it's true.


Trigon.

 

[Peter Daniel]

You are not talking about my A75s?

 

[trigon]

Yeap. indid

Wonderfully built and beautifully sounding Peter's A75s.



Trigon

 

[Nelson Pass]

Still more gratuitous Haiku:

Groman, he listen
Mono gives him a big smile.
Back to the old days!

 

[gromanswe]

Still more gratuitous Haiku:

Groman, he listen
Mono gives him a big smile.
Back to the old days!

Hey, my friend
with only 2 EARS
still
in our mind
time stands still
And yet
Times are a'Changing -

mostly things are paradoxes and "chimäres" (what is chimär in English, my dictionary doesn't say


Time thinkin' in
WorldLanguage, Scientifically
LATIN
http://w1.871.telia.com/~u87112797/Svenska/show-off_sw.html
translations into Swedish, so you can

ACCURATELY communicate this
"A jolly good boy"
deep man

groman
If
everyone had some Nelson-Quality in THEM SELVES
life would be so much easier
to live