Still don't know what to use under 300 hz...(horn loaded system)

[rvrazvan]

I've been playing all summer with horns. I have a mould for a 170hz tractrix that i plan to use down to 300hz. But i still need to decide what i will use under it.
I would like to have a single unit in order to keep the filter "tube friendly".
I have no experience with passive filter, and i'm far away from owning enough amps to go active....

A tapped horn would be nice, but i have yet to see one that goes to +300hz.
A conical horn will be .......huuge.
A ported box will be...dull and inefficient.

some help?

[dirkwright]

Originally Posted by rvrazvan

A ported box will be...dull and inefficient.

some help?

A pair of ported boxes for high sensitivity 18" drivers, screwed to the wall, preferably one in each corner. Each one having a 300-500 watt plate amp.

[simon7000]

Corner Horn

[bear]

It is somewhat irrelevant what you use initially.

Anything.

No matter what you are going to end up with a second amp for the bass.
Just about nothing practical in terms of size is going to match the sensitivity of the upper horn, unless ur using a cone driver there (?) but a compression driver on top is a better idea, imo... So, another amp is a good idea and should not be too expensive, especially if you get something that is PP and used for the job or build ur own... or even solid state?

A whole lot depends on your room and room size. Very important to what will work well.

Corner horns are very room sensitive and dependent. PIA to build...

Also the aesthetics, are they important, or do you need to please someone else's sense of how things must look??

_-_-bear

[rvrazvan]

Originally Posted by bear

It is somewhat irrelevant what you use initially.

Anything.

No matter what you are going to end up with a second amp for the bass.
Just about nothing practical in terms of size is going to match the sensitivity of the upper horn, unless ur using a cone driver there (?) but a compression driver on top is a better idea, imo... So, another amp is a good idea and should not be too expensive, especially if you get something that is PP and used for the job or build ur own... or even solid state?

A whole lot depends on your room and room size. Very important to what will work well.

Corner horns are very room sensitive and dependent. PIA to build...

Also the aesthetics, are they important, or do you need to please someone else's sense of how things must look??

_-_-bear

To be honest i don't care about the looks...yet ). It just needs to sound good. Would be nice to have an even bigger tractrix horn to get down to 150hz...but it won't fit tru the door ).
The system will be moved alot, so i can't just put all my money on corners...sometimes i just won't have the luxury of having corners at all.

As a last resort i might use a big sealed box with two 12" or 15" inch drivers in each box, and SS plate amps. The tube amp will be happy with a solution like this. But would the dynamics even be in the same league as the horns above?

[whgeiger]

Originally Posted by rvrazvan

I've been playing all summer with horns. I have a mould for a 170hz tractrix that i plan to use down to 300hz. But i still need to decide what i will use under it.
I would like to have a single unit in order to keep the filter "tube friendly".
I have no experience with passive filter, and i'm far away from owning enough amps to go active....

A tapped horn would be nice, but i have yet to see one that goes to +300hz.
A conical horn will be .......huuge.
A ported box will be...dull and inefficient.

some help?

.. which is:

1) You need amplifier muscle to drive a sub-woofer, horned or not. An SS amplifier will fill this role at a reasonable cost and deliver superior results as well (due to its lower source impedance).

2) You need an active crossover to feed this amplifier. Components for a low frequency, passive crossover are large, expensive, and decouple the driver form the amplifier by effectively reducing its damping factor, which for tube amplifiers is typically low to begin with.

3) You need a corner horn. It is the only bass horn that will fit in an at-home venue. It uses a room corner to extend its acoustical size to what is required. Otherwise, consider using a servo controlled subwoofer such as:

Rythmik
Rythmik Audio • Servo subwoofer testimonials and reviews

or

Velodyne.
Digital Drive PLUS 18 18" Subwoofer - Shop All Subwoofers - Subwoofers > - Shop

and there are others as well.

Regards,

WHG

[dirkwright]

Originally Posted by rvrazvan

As a last resort i might use a big sealed box with two 12" or 15" inch drivers in each box, and SS plate amps. The tube amp will be happy with a solution like this. But would the dynamics even be in the same league as the horns above?

If you have enough power in the amps, then yes.

[graaf]

Originally Posted by rvrazvan

A tapped horn would be nice, but i have yet to see one that goes to +300hz.
A conical horn will be .......huuge.
A ported box will be...dull and inefficient.

how about...

[ra7]

I'm using the Deltalite 2515 II in a ported cab, fairly efficient down to 50 Hz. The cab is huge (~ 6ft3), but if it were any bigger, I'd not have space for it, such are the dimensions of my living room. So, we have similar problems.

As bear says, anything to get started.

Edit: The vent is not showing in the pic. I cut it later

[AllenB]

Originally Posted by rvrazvan

Would be nice to have an even bigger tractrix horn to get down to 150hz...

This might be what you need or maybe just a little lower. Your 300 will be crossed over above 300 and this range you're trying to fill is very important. The below 100 region can manage with its own subs or tapped horns or whatever.