I have 2 Alpine Type R-10" in a Fusion box (1.0 cu ft per woofer). I
would like to port this box but I was wondering the best way. The top
and back of it are covered by amps and I can not port there. The only
place that is free is on the sides of it where the port would not be
facing anything. Are the PNR ports that Fusion offers wort the extra
cost also?

why port it.....underpowered???


"Bryan Jackson" wrote in message
om...
I have 2 Alpine Type R-10" in a Fusion box (1.0 cu ft per woofer). I
would like to port this box but I was wondering the best way. The top
and back of it are covered by amps and I can not port there. The only
place that is free is on the sides of it where the port would not be
facing anything. Are the PNR ports that Fusion offers wort the extra
cost also?

whay do you want to port it?

what frequency do you want to tune it to?

Bryan Jackson wrote:

I have 2 Alpine Type R-10" in a Fusion box (1.0 cu ft per woofer). I
would like to port this box but I was wondering the best way. The top
and back of it are covered by amps and I can not port there. The only
place that is free is on the sides of it where the port would not be
facing anything. Are the PNR ports that Fusion offers wort the extra
cost also?

I would like more bass and have no money for a new amp. I have a
cheepy amp on it (a "1600" watt Lanzar rack mount amp).

"ReEfErMaDnEsS" wrote in message news:JIvQb.142060$na.223264@attbi_s04...
why port it.....underpowered???


"Bryan Jackson" wrote in message
om...
I have 2 Alpine Type R-10" in a Fusion box (1.0 cu ft per woofer). I
would like to port this box but I was wondering the best way. The top
and back of it are covered by amps and I can not port there. The only
place that is free is on the sides of it where the port would not be
facing anything. Are the PNR ports that Fusion offers wort the extra
cost also?

You can't just stick a port in a box that's already sealed & designed for a
specific woofer. Of course, I don't know anything about Fusion, so maybe
it's not even optimal for your Alpine woofer to begin with. In which case,
who knows?

Ported boxes will be a specific size for a specific woofer. The port will
be a certain size as well. For a given woofer, a ported and sealed box will
be different internal volumes.



Tony

--



What's more likely? That an all-powerful mysterious god created the
universe and then decided not to give any proof of his existence? Or, that
he simply doesn't exist at all? And that we created him so that we wouldn't
have to feel so small and alone. -Eleanor Arroway, Contact

"Eddie Runner" wrote in message
...
whay do you want to port it?

what frequency do you want to tune it to?

Bryan Jackson wrote:

I have 2 Alpine Type R-10" in a Fusion box (1.0 cu ft per woofer). I
would like to port this box but I was wondering the best way. The top
and back of it are covered by amps and I can not port there. The only
place that is free is on the sides of it where the port would not be
facing anything. Are the PNR ports that Fusion offers wort the extra
cost also?

In article ,
(Bryan Jackson) wrote:

I have 2 Alpine Type R-10" in a Fusion box (1.0 cu ft per woofer). I
would like to port this box but I was wondering the best way. The top
and back of it are covered by amps and I can not port there. The only
place that is free is on the sides of it where the port would not be
facing anything. Are the PNR ports that Fusion offers wort the extra
cost also?

Crap, that's a tiny box. No, you can not port it. The proper port size
for such a box would be a drinking straw cut in half.

That speaker was designed for a tiny box and there's not much that you
can do about it. It is optimized for air pressure rather than air
volume. Sensitivity is only 85dB as a result. Your options are to give
the woofers more power or replace them.

Crap, that's a tiny box.


Actually it's a little big for the Type-R 10 sealed.


No, you can not port it.

He could, but it would be tuned a bit higher than most people would like.


The proper port size
for such a box would be a drinking straw cut in half.


OK, that's just exaggerating.

It is optimized for air pressure rather than air
volume.


WTF does this mean? Air pressure IS volume dumbass.


Sensitivity is only 85dB as a result. Your options are to give
the woofers more power or replace them.

Or make a new box.



Paul Vina

In article %oFQb.115942$nt4.474258@attbi_s51,
"Paul Vina" wrote:


Crap, that's a tiny box.


Actually it's a little big for the Type-R 10 sealed.


No, you can not port it.

He could, but it would be tuned a bit higher than most people would like.


The proper port size
for such a box would be a drinking straw cut in half.


OK, that's just exaggerating.

It is optimized for air pressure rather than air
volume.


WTF does this mean? Air pressure IS volume dumbass.

It's a matter of leverage; load matching. The voicecoil is wound for
working against the high back pressure of a small enclosure at the cost
of excursion. You can put it on a bigger box but it won't gain much.
It would probably just raise the impedance.

Subs for large enclosures have a different voice coil and softer
suspension. They don't have the force to work well in a small enclosure
but they can gets lots of excursion from little power when they're in a
large enclosure.



Sensitivity is only 85dB as a result. Your options are to give
the woofers more power or replace them.

Or make a new box.



Paul Vina