metalhead needs a ported box design for a 12" Pioneer TS-W3003D4

[Papermaker85 5,000+ posts]

Phase what? Phase at the subsonic? Phase at the port which is summed?

Between the port and sub bro

 

[LosIsATool 5,000+ posts]

Between the port and sub bro

In a vented box at the frequency at which the box is tuned, the port plays and the woofer doesn't. Since the port and the woofer have a direct path to our ears (they are both mounted in the baffle of the box), we hear the SUM.

 

[Boomin_tahoe 5,000+ posts]

In a vented box at the frequency at which the box is tuned, the port plays and the woofer doesn't. Since the port and the woofer have a direct path to our ears (they are both mounted in the baffle of the box), we hear the SUM.

Does box rise still exist in t-line enclosures?

 

[Papermaker85 5,000+ posts]

In a vented box at the frequency at which the box is tuned, the port plays and the woofer doesn't. Since the port and the woofer have a direct path to our ears (they are both mounted in the baffle of the box), we hear the SUM.

Dude the port AND the woofer play the woofer is the mechanical resources atrength the port is an acoustical resonator. The woofer is loaded at tuning.

The futher you get from tuning the qtc increases and the woofer starts to unload and relies highly on the enclosure. That why a big port limits bandwidth just like a big box.

Wverything has damping. The box port a d woofer. Not to mention the front and rear wave are completely out of phase. The boxes shape tuned and pathway the rear wave travels you try to minimize phase shift and couple the front and rear wave.

This is why any Sq installation utiizes small low tuned ported boxes.

Transmission line work on the principle of the "port" matching the compliance of the woofer and the vent length of the port being that of the FS of the driver stabilizing phase and impedance shifts.

Tuning higher gives the illusion of greater transient response because the port is dominated and the phase shift is alot less noticeable.

You want tight loud top end. Tuesday close to resonance and go with a smaller box with a slight increase in port area.

 

[LosIsATool 5,000+ posts]

Does box rise still exist in t-line enclosures?

The impeadance changes when the cone picks up vibration from your voice. So yes

 

[LosIsATool 5,000+ posts]

View attachment 26557135

Dude the port AND the woofer play. The woofer is loaded.The father you get from tuning the qtc increase and the woofer starts to unload and relies highly on the enclosure. That why a big port limits bandwidth just like a big box.

Wverything has damping. The box port a d woofer. Not to mention the front and rear wave are completely out of phase. The boxes shape tuned and pathway the rear wave travels you try to minimize phase shift and couple the front and rear wave.

This is why any Sq installation utiizes small low tuned ported boxes.

Transmission line work on the principle of the "port" matching the compliance of the woofer and the vent length of the port being that of the FS of the driver stabilizing phase and impedance shifts.

In this graph, the output of the system (port and sub) is the blue line. The output of the port is the red line and the green line is the output of the woofer. That’s why there is a dip at 33hz (tuning).

About box size.. IB....

 

[Papermaker85 5,000+ posts]

The impeadance changes when the cone picks up vibration from your voice. So yes

Wtf?

You understand why this happens? And that has nothing to do with the enclosure

 

[Papermaker85 5,000+ posts]

Can't see it

 

[LosIsATool 5,000+ posts]

Wtf?You understand why this happens? And that has nothing to do with the enclosure

Coil moves. I don’t understand what the wtf is for.

 

---------- Post added at 06:15 AM ---------- Previous post was at 06:15 AM ----------

 

Can't see it

Tap it

 

[Papermaker85 5,000+ posts]

You don't know how to do the become like I do in my post? Easier on read

 

[Papermaker85 5,000+ posts]

Coil moves. I don’t understand what the wtf is for. 

---------- Post added at 06:15 AM ---------- Previous post was at 06:15 AM ----------

 

Tap it

Impedance fluctuates when you induce a voltage and current into the magnetic field/coil.

 

[LosIsATool 5,000+ posts]

You don't know how to do the become like I do in my post? Easier on read

Sorry. Anyway. You will see the port is the source of output at the tuning. That’s why the cone does not move

 

[LosIsATool 5,000+ posts]

Impedance fluctuates when you induce a voltage and current into the magnetic field/coil.

I’m not joking. Put a meter on one and talk beside it. It will fluctuate.

 

[Papermaker85 5,000+ posts]

I’m not joking. Put a meter on one and talk beside it. It will fluctuate.

That has Nothing to do with the question.

I know how transducers work. Thanks

 

[Papermaker85 5,000+ posts]

Sorry. Anyway. You will see the port is the source of output at the tuning. That’s why the cone does not move

The cone does move. It has to to displace air to move the air mass trapped in the port. At this point the ports impedance is highest. Just like a woofer..