Performance specs on the LS Runt (LaScala Runt)?

[formica]

Any one have the performance specs on the LS Runt (LaScala Runt) seen at the Hope Factory Museum? Would seem to be a good candidate for a centre channel... but I guessing it probably didn't perform very well (small bass horn = high bass rolloff) given it wasn't kept in production.

Rob

[seti]

I thought I heard someone in the museum discussing the fact that this

was used on some political campaign tour and was not used in a two or

three channel setup. Is this correct guys?

[WMcD]

I've never seen any performance reports. I've made an effort to collect everything Klipsch publishes or has been published about Heritage.

The LS goes to 53 Hz or so, in a corner, in a good room. The runt looks like a half size version and so I'd have to guess at over 100 Hz in a corner, in a good room. The LS has an Fc of about 63 Hz, last time I calculated. So the Runt could be 120 Hz. Fc

However, in a center position we're losing some mouth loading and that would indicate maybe in the range of 150 Hz.

We could look at the K-400. It has an Fc of 273 or so, and only works to a bit under 400. Some of that is, I believe that driver resonance is at 400, or above Fc, while in the LS it is below Fc (as is the case for the K-Horn).

Doing the comparison again, the Runt bass is about twice as big in any linear relation as the K-400 and thus might go an octave lower. We're back to, I think, somewhere below 200, but not too much. Maybe, again about 150 Hz.

Does that make a good center? Some people are requesting response to 70 Hz as the upper limit. That may be lower than really necesary. OTOH, people like Horn Ed suggest full range!

Myabe one reason it was not used by Klispch as a center is height. PWK liked tweeters up near the K-Horn's altitude. It is a bit big to fly, and getting it off the floor would compromise an iffy bass situation. There are some comments in his writings that speakers on stilts don't work well.

I'd be very surpised if PWK did not play with it, at least once, as a center.

Gil

[DrWho]

Why not do the "ported scala mod" on it? IF it had an F3 around 100Hz,

porting it could possibly extend the response down to 70Hz with the

right driver. (without needing to increase the volume that much). Does

is it have the exact same flare rate as the lascala, just not as tall?

[formica]

Thanks for the info... 120Hz to 200Hz sounds like a realistic

range. I suppose a "cornscala" would be a better option for

compact size and bass extension...

Myabe one reason it was not used

by Klispch as a center is height. PWK liked tweeters up near the

K-Horn's altitude. It is a bit big to fly, and getting it off the

floor would compromise an iffy bass situation.

They weren't worried about big-screen TVs or projectors back

then... A LaScala / Belle / Cornwall would be tight fits in my

basement install once I'm done.

BTW, I'm just researching possible centre upgrades from the Heresy i've got (preferably using the K400)...

Thanks...

Rob

[DrWho]

BTW, I'm just researching possible centre upgrades from the Heresy i've got (preferably using the K400)...

Sounds like you and jwcullison

are in the same boat...I wonder what his progress is. There really

doesn't seem to be many if any high output 10 or 12 inch drivers

capable of extension below 70Hz with decent sized cabinets. Though I

suppose a really wide center channel could be used in a few

situations...how bout a cornsala dbb with the double bass bin turned on

its side

[j-malotky]

I remember the runt being discussed in the past and recall the low end being 120hz.

Years back when I was building my Heritage HT, I was also trying to

find a center using the K400. At the time, Steve P was using a

Heresys with a K400 sitting under it in its own cabinet. but the

single woofer was weak.

My original plan was to build a ported cabinet using two K22 woofers,

but I ran into a deal where I was able to get two Heresy WO cabinets

for $40, so that was my first attempt. Having two Heresy cabs

increases the output by 3db, making it easier to crossover, and using

the original Heresy cabinet design keeps the upper bass tight matching

the Heritage horn sound nicely. Rolling off at 80hz is no problem

in HT.

People look at my center and think there is no way that can keep up

with my Khorns. Wrong, it sounds great even for music. But

the best part is it allowed me to utilize a HUGE screen.

JM

[formica]

Though I suppose a really wide center channel

could be used in a few situations...how bout a cornsala dbb with the

double bass bin turned on its side

Actually a single bass bin like the original Cornscala compacted to use

the space behind the mid / high frequency horns should be small

enough... but would have the efficiency of a Cornwall (I'd have to drop

the tweeter and mid to match). A full size LaScala could fit... but

limits my screen size... and a Vertical Cornwall would be a little wide

to still squeeze in my IB... but could work as well.

Just planning my front wall layout, as I will need to know this when

doing my rough framing. I'm going to be integrating centre and

subwoofer into the wall in a down sized indyklipschfan type of

way... so I need to leave enough room.

People look at my center and think there is no

way that can keep up with my Khorns. Wrong, it sounds great even

for music. But the best part is it allowed me to utilize a HUGE

screen.

Huge is an understatement... what size is that screen ?? My

front wall, ironically, is very similar including the support beam in

the ceiling (my room is a mirror image actually). My height seems

lower though, with a typical 1950's ± 6'6" finished clearance.[]

Rob

[Marvel]

I'm still curious about building a center channel speaker that uses a

Smith horn, since it has a wide horizontal pattern and is only 3 3/4

inches high. It would probably need a tweeter to go with it though.

One of the guys on the Lansing Heritage forum was designing a center

that is built like the Paragon. Two woofers on each side and a single

Smith in the middle with the curve of the cabinet matching the curve of

the Smith. Attached is his drawing, which has the Smith on the bottom

of the cab as he was going to mount it over the screen or TV.

Timbre matching would be the biggest issue, but it is a very cool concept none the less..

Bruce