Author Topic: Coral 3-ways and a Akai  (Read 15237 times)

Offline The Godfather

  • Trade Count: (+5)
  • AVForums Veteran
  • *****
  • Posts: 4,377
Re: Coral 3-ways and a Akai
« Reply #15 on: January 09, 2013, 12:49:51 PM »
Technically it's more of a filter than a crossover. A crossover splits frequencies, caps prevents or limits the lower frequencies from entering the tweeters.
Of what components does a passive "crossover" comprise?

Offline oNyX

  • Trade Count: (+1)
  • AVForums Veteran
  • *****
  • Posts: 2,100
  • The more vintage the better...
Re: Coral 3-ways and a Akai
« Reply #16 on: January 09, 2013, 12:53:37 PM »
Coils, caps and resistors.
Recapping of vintage equipment isn't restoration. By definition, restoration means returning to it's original condition.

Offline GearSlave

  • Peacekeeper Extraordinaire
  • Trade Count: (+3)
  • AVForums Veteran
  • *****
  • Posts: 8,796
  • Ohm's Law has no business in Audio
    • Studio B
Re: Coral 3-ways and a Akai
« Reply #17 on: January 09, 2013, 01:23:47 PM »
Technically it's more of a filter than a crossover. A crossover splits frequencies, caps prevents or limits the lower frequencies from entering the tweeters.

Technically, you are confused.  :facepalm:
Resistance is not futile; it is voltage divided by current (R=V/I)

Offline fdlsys

  • Vinylist
  • Trader
  • Trade Count: (+74)
  • *****
  • Posts: 7,234
  • Do you like life, sweetheart?
Re: Coral 3-ways and a Akai
« Reply #18 on: January 09, 2013, 01:31:04 PM »
Coils, caps and resistors.
And of what components does a passive "filter" comprise?

Furthermore, what is the difference between the crossover and multiple (usually parallel) filters?

Hints:
- google passive crossovers and filter calculation.
- use Winisd to calculate the filters / crossover for your speakers (ignore the enclosure design that requires TS paramteres that you don't have)
The four building blocks of the universe are fire, water, gravel and vinyl. Dave Barry
Come back when you’ve lived a little. Miles Davis

Offline The Godfather

  • Trade Count: (+5)
  • AVForums Veteran
  • *****
  • Posts: 4,377
Re: Coral 3-ways and a Akai
« Reply #19 on: January 09, 2013, 01:58:33 PM »
Coils, caps and resistors.
Please answer fldsys question above as to what components filters use.

I agree that a crossover does "split frequencies", however that is not the full story. Why does it split frequencies? For what purpose?

Offline oNyX

  • Trade Count: (+1)
  • AVForums Veteran
  • *****
  • Posts: 2,100
  • The more vintage the better...
Re: Coral 3-ways and a Akai
« Reply #20 on: January 09, 2013, 02:08:16 PM »
All i know is you cant have a tweeter without a capacitor because you risk damaging the tweeter with lower frequencies. The higher the value of the cap is, more sharp will the tweeter sound.

Crossovers also help to keep the impedance normal.
« Last Edit: January 09, 2013, 02:20:53 PM by oNyX »
Recapping of vintage equipment isn't restoration. By definition, restoration means returning to it's original condition.

Offline bbe22

  • Trade Count: (+1)
  • AVForums Veteran
  • ***
  • Posts: 888
Re: Coral 3-ways and a Akai
« Reply #21 on: January 09, 2013, 02:40:46 PM »
All i know is ......................
Or, more directly: Will you please finally read up on the passive "crossovers" ....................

Offline oNyX

  • Trade Count: (+1)
  • AVForums Veteran
  • *****
  • Posts: 2,100
  • The more vintage the better...
Re: Coral 3-ways and a Akai
« Reply #22 on: January 09, 2013, 03:26:51 PM »
I found a forum discussion talking about passive crossovers. "The true horror of passive crossovers." I cant post a link because im using my phone to browse, nowhere near a computer.
Recapping of vintage equipment isn't restoration. By definition, restoration means returning to it's original condition.

Offline oNyX

  • Trade Count: (+1)
  • AVForums Veteran
  • *****
  • Posts: 2,100
  • The more vintage the better...
Re: Coral 3-ways and a Akai
« Reply #23 on: January 09, 2013, 07:37:13 PM »
Recapping of vintage equipment isn't restoration. By definition, restoration means returning to it's original condition.

Offline LAV

  • Trade Count: (+6)
  • AVForums Veteran
  • *****
  • Posts: 2,710
Re: Coral 3-ways and a Akai
« Reply #24 on: January 09, 2013, 08:13:56 PM »
The caps look fine, but isn't it a bit too high? Most have 2.2uF - 4.7uF but these has 6uF.

I guess higher is better, make them sound sharper.
Well, didn't Roxette say to "Look sharp" ? "Listen sharp" is probably related.

The cap value would also depend on the relative permeability and magnetic reluctance (ref. Hughes - "Electrical Technology")

 ;)
Vaal Triangle (Southern Gauteng)

Offline skollie

  • Trade Count: (+5)
  • AVForums Veteran
  • *****
  • Posts: 5,760
  • Cableth make no differenth. Ith all in the plugth
    • Blue Angel
Re: Coral 3-ways and a Akai
« Reply #25 on: January 09, 2013, 09:09:01 PM »
It doesn't sound crappy, it sounds good. I just wanted to know if real 3-way xo will improve the sound.

The caps are 50V 6uF and resistors are 5W 5 Ohms.

As for the amp, the tuning knob has a type of weight inside but the Allen Key  screw is also stuck and is starting to crack around it.

That's the flywheel of the tuning mechanism, made from a very soft, easily breaking mazak concoction.

mafioso
If you don't like my principles, I have others - Groucho Marx

Offline The Godfather

  • Trade Count: (+5)
  • AVForums Veteran
  • *****
  • Posts: 4,377
Re: Coral 3-ways and a Akai
« Reply #26 on: January 09, 2013, 09:53:39 PM »
Here's one link.
http://hddaudio.net/viewtopic.php?id=65
Why are you quoting an active vs passive forum discussion? The information on passives in that discussion are going to be too high level for you. I think what people meant was go and get a basic understanding off passive crossover networks.

EG: http://www.diyaudioandvideo.com/FAQ/Crossover/

Crossovers don't always help keep impedance normal. That is a specific feature some crossovers implement, and just like one of your filters, is a part of the crossover.

Offline Telephono

  • Trade Count: (+1)
  • AVForums Veteran
  • *****
  • Posts: 1,302
Re: Coral 3-ways and a Akai
« Reply #27 on: January 09, 2013, 10:15:40 PM »
Technically it's more of a filter than a crossover. A crossover splits frequencies, caps prevents or limits the lower frequencies from entering the tweeters.

 :facepalm:

Ermehgehrd.
Science flies you to the moon. Religion flies you into buildings.

Offline oNyX

  • Trade Count: (+1)
  • AVForums Veteran
  • *****
  • Posts: 2,100
  • The more vintage the better...
Re: Coral 3-ways and a Akai
« Reply #28 on: January 09, 2013, 10:55:06 PM »
I have the Akai on my Pioneers now, it sounds great. My dad didn't have Kontakt K60 so he used Spark Lubricant, that did the trick. I noticed the volume is dual, but the second one is pre-set not the right channel volume. The tuning knob have to wait, the weight is stuck and if I try to remove it with a hammer I'll probably damage it. The Corals have to wait for now, we are still deciding where to put them.

« Last Edit: January 09, 2013, 11:13:15 PM by oNyX »
Recapping of vintage equipment isn't restoration. By definition, restoration means returning to it's original condition.

Offline oNyX

  • Trade Count: (+1)
  • AVForums Veteran
  • *****
  • Posts: 2,100
  • The more vintage the better...
Re: Coral 3-ways and a Akai
« Reply #29 on: January 09, 2013, 11:04:11 PM »
Why are you quoting an active vs passive forum discussion? The information on passives in that discussion are going to be too high level for you. I think what people meant was go and get a basic understanding off passive crossover networks.

EG: http://www.diyaudioandvideo.com/FAQ/Crossover/

Crossovers don't always help keep impedance normal. That is a specific feature some crossovers implement, and just like one of your filters, is a part of the crossover.

I weren't even reading the active xo part.  :roll:
Recapping of vintage equipment isn't restoration. By definition, restoration means returning to it's original condition.