CALLING INTENSITEST DR WHO

[johnyholiday]

Can the existing ducts on the KP-115-SW be shorten or lenthed to get

more LF , going to stack em an, maybe put a Marshal 9100 dual mono

block on top what amp is up in the air for now,if it sounds like a bass

rig then so be it ,if like PA , or sub, so be it, just more LF

FREQUENCY RESPONSE:

50Hz - 400Hz±4dB (-10dB @ 38Hz) @ 3 meters, 1/2 space anechoicUsable

response to 1.5kHz

POWER HANDLING:

400 watts (48V)

SENSITIVITY:

101dB @ 2.83V, 1 meter, 1/2 space anechoic

NOMINAL IMPEDANCE:

8 ohms, 5.8 ohms minimum @ 150Hz

CROSSOVER FREQUENCY:

150Hz

MAX CONTINUOUS OUTPUT:

126dB

COVERAGE ANGLE:

Essentially omnidirectional below 150Hz

WOOFER:

One 15" K-48-K die-cast aluminum frame woofer

ENCLOSURE MATERIAL:

0.75" void-free plywood internally braced and lined with acoustical

foam

INPUT CONNECTIONS:

Locking Neutrik D-shell 0.25" phone jacks and red/black five-way

binding posts

DIMENSIONS:

18.825" (47.9cm) x 24.5" (62.2cm) x 19.5" (35cm)

WEIGHT:

65 lbs (29.5kg) Net/70 lbs. (31.8kg) ACCESSORIES:

KP-36-T Support Tube and KP-18-T Support Tube (purchased separately

from Klipsch)

BUILT FROM:

2001

BUILT UNTIL:

2004

[johnyholiday]

Or stuck EQ-ing, like to take a shot at no EQ, unless it makes no sense what so ever

Marshall 9100 Dual Monoblock 50/50 Watt stereo tube power amp,no rack naked on top "Klipsch Marshall Punisher Stack"

[colterphoto1]

Those are beauties Johny! Where did you get them in Birch lacquer? Or did someone strip them down from the standard black? Whatever they are absolutely gorgeous!

Are you going to use this for bass guitar rig, or HT subs? I think the general answer is that most cabinets can be 'retuned' but you will give away some efficiency and perhaps power handling in exchange for lowered response. It's always some kind of tradeoff. Those are Designed to be PA subs with the pole mount and a KP series two or three way on top.

I'd love to come out and see your museum sometime!

Michael

[capo72]

That is waaay cool!

Jeremy

[johnyholiday]

Thanks Colter an Capo i'm leaning trowards an Ashdown with EQ or Eden

bass amp,these are from Sound Stage in Fresno they do alot of church PA

stuff or did ,Guitar Center has ran alot of these guys out ,i get a pro

discount at GC i will have to hit my buddys up there,a buddy Ron

Catalano AKA "The Jazzer"had em for awhile, he will be opening for

George Benson this summer like in June, a few gigs ,CBS all ready

signed that gig with him" Ron Catalano an the so an so's", an this guy

that is signed with Motown, that use to sing with the Temptations ,an

plays keyboards ,can't remember Bob's last name,been alot of members in

the Temps,the Benson gig was a 4 member gig now it's a 7 member "The

Jazzer" said man now i'm down to 800 bones for one night blowen the

sax,i got ring "The Jazzer" an get Bobs last name again, "The Jazzer"

has played ,an freinds With Bob Hope an his wife playing his shows an

the golf tournament at their house ,Bob Hopes fire place can burn a

regular mans house in wood, in a night, an a Baby Grand in a glass room

that no one plays, pics with all the stars an politicians,Tele

Savalas,Tip o'Neill.....freinds with" The Carpenters" they grew up

together in Upland&Downy, Ca. Karens brother spent 75k on his

sisters funeral way back when "The Jazzer" said it was

beautifull.....on an on an on......anyway going to use it as a sub at

the flopp pad, an punish people

[colterphoto1]

'Bob Hopes fire place can burn a

regular mans house in wood, in a night'- dig it

I'm still confused. You are thinking of running these with a tube bass guitar head as subs for a stereo system.. ?????? Won't it sound like lukewarm oatmeal oozing out of the ports?

I'd think SS state all the way for those babies. But def check with the Dr. about retuning. I'll give him a shout and ask him to check in here.

A couple of those might be nice with my LSI stacks, doncha think? I'd love to hear them with HIP's up top or any of the KP series. Maybe a little 12" three way with the 115 for subs?

M

[colterphoto1]

oh, and wots' the flopp house???? yer pad or a musicians practice place?

[DrWho]

Short answer: no

But you can experiment with plugging up the ports, which will lower the tuning point of the cabinet.

Dark Blue = stock tuning

Light Blue = 2 ports plugged, 35Hz tuning

Green = 3 ports plugged, 25Hz tuning

Shown in the picture is the maximum SPL capability of a single unit (400W, 250W, 180W respectively). Add 6dB for two units.

You might consider running a 1st order 50Hz low pass Butterworth filter

in front of each unit to knock out the higher frequencies - on the

green plot (3 ports plugged) it'll give you -3dB at 30Hz and -10dB at

18Hz.

So ya, try the simple port plugging approach first and see how you like

the sound...and then if you do we can start talking fancy filters and

new ports (port noise will go out the window so if you ever crank it

you'll want bigger ones to avoid the chuffing).

Anyways, this is just the low signal modelling of the K-48 in that 4

cubic foot cabinet...It's been my experience that the driver doesn't

perform as well below 40Hz - no matter the

enclosure/tuning...distortion goes out the window. You might get by

with 30Hz extension, but that's not really a "sub"woofer...

[colterphoto1]

Nicely explained Dr Who. That helps me understand how my old EV TL bins operate. They are a series of home-built cabinets based on plans widely circulated by EV. 12", 15" and 18" are available. The port is a 'shelf' type like a Cornwall, but in three sections.

There is an option to put cover plate over the middle section, eliminating about 2/5 of the port area- it's explained that this lowers the available bandwidth of the cabinet, but at some sacrifice in efficiency and response smoothness, I believe.

[johnyholiday]

Thanks DR WHO ,Colter get this man a six pack,they will be crossed at

80 hertz,,just a SUPER woofer ,then use that yamaha opitmizer to dial

it in, mostly for music five string bass-low "B" string,or plug

in an jam along, to the funky dawg house bass beat,amp dual input

mix, not worried about fake Hollywood implosions, hard to mic one

of those,or like Kiss Alive where even the crowd is dubbed an looped,for bigger sound, hard to mic live show

,not to mention the rest is dubbed too,or a walnut being crushed, the pitch

being slowed down, so it sounds like a skull being crushed,,.. five Corns an 2KPs should cause vertigo, RE: flop

pad/swamp is like what is called

woodsheden by the old blues dudes, you go to the woodshed ,an jam until

it flows, RE:"The Jazzer"he says the motown dude is Lloyd Williams-

Motown "Be Mine Tonight" "Shout".....*KP-48=Eminence Magnum 15HO

[colterphoto1]

funny you should mention crushing some skulls i too will be surrounded by Cornwalls, cept of course two mains as scalas updated of course and for the bone splintering sounds cars exploding earth ripping apart at her seams sounds i shall employ a cabinet designed for theatre by JBL single mammoth 18 placed innocently in corner with CROWN amp up top to jellify the insides of bystanders and make my china quake in its cupboard.

(isn't johny-speak fun, you guys should try it sometime just awake groggily no coffee and type words as they come out of yer head.

Michael [grins]

[colterphoto1]

johny,

you want some funky bass? who's the Dead bassist? there's a pix of him here somewhere with the alembic/bag end massive rig overhead. Some of the cabinets have 2xEV12 and 6xJBL4" speakers in a line array.

I have a pair of these taking up space in my garage. They would be awesome alongside those dual 15's. If there's any flea-like finger-popping bass players in the house, they'd dig the twangy sounds of these puppies. There's no xover, they are wired to be bi-amped as the top of a three way system (alongside dual 15's, strangely enough)

Michael

[johnyholiday]

KP-48=Eminence Magnum 15HO

[johnyholiday]

First thought was a Hafler Trans-Nova hummm: Eminence response curves are

measured under the following

controlled test conditions:

* All speakers are tested at 1W/1m

using a variety of test set-ups for

the appropriate impedance

* LMS using 0.25" supplied

microphone (software calibrated)

mounted 1m from wall/baffle

* 2ft. X 2 ft. baffle is built into the

wall with the speaker mounted

flush against a steel ring for

minimum diffraction

* Hafler P1500 Trans-Nova

amplifier

* 2700 cu. ft. chamber with

fiberglass on all six surfaces

(three with custom-made

wedges)

[johnyholiday]

funny you should mention crushing some

skulls i too will be surrounded by Cornwalls, cept of course two mains

as scalas updated of course and for the bone splintering sounds cars

exploding earth ripping apart at her seams sounds i shall employ a

cabinet designed for theatre by JBL single mammoth 18 placed innocently

in corner with CROWN amp up top to jellify the insides of bystanders

and make my china quake in its cupboard.

(isn't johny-speak fun,

you guys should try it sometime just awake groggily no coffee and

type words as they come out of yer head.

Michael [grins]

Shall ride, hang ten, on cali king,during china quake,mean earth shaker

[johnyholiday]

SPL represents one of the most useful specifications published for any transducer. It is a representation of the efficiency and

volume you can expect from a device relative to the input power. This is important because it requires twice the power to

increase the volume of a speaker by 3dB. For instance, to increase the volume of a 50W guitar amplifier 3dB (an audible,

but relatively small amount), it would require 100W of power. The same outcome could be achieved more economically by

replacing the speaker with a model that is 3dB more sensitive.

Loudspeaker manufacturers follow different rules when obtaining this information. You cannot necessarily compare like for like

when looking at the sensitivities of different manufacturers loudspeakers.

Most manufacturers determine sensitivity by putting the speaker in a baffle and measuring the sound pressure level at one

meter, with 1W of input power across the frequency response curve. The problem is that one manufacturer may place the

microphone one meter from the dust cap of the speaker and gain a distinct advantage over the manufacturer who placed the

microphone one meter from the baffle board. The Eminence method is to measure with the microphone one meter from the

baffle board. We then take the frequency response curve and points across what we have specified as the usable frequency

range to obtain the average sound pressure level (SPL). Eminence believes this method is extremely accurate and represents

exactly what you can expect from the transducer in a specific application.

Although sensitivity is important, be sure not to buy your transducer based on efficiency alone. You must be willing to

compromise to get your ideal combination of low-frequency reproduction and sensitivity. If you have lots of power, you can

have awesome low-frequency reproduction and maintain lots of volume from a speaker with lower sensitivity. On the other hand,

if power is a consideration, you may want to sacrifice some low-frequency reproduction in order to maintain a higher sound

pressure level.

As a comparison, think of an automobile. If all you do with your car is drive a few miles to work each day, you can probably get

by with a small, efficient compact car that has less than 100 horsepower. On the other hand, maybe you carpool and carry six

other people to work with you. In that case, you need a larger, more powerful car. The end result is you gave up efficiency but

you were doing much more work. The key with loudspeaker selection is to choose the loudspeaker that offers you what you

need in terms of low-frequency reproduction, but has the best sensitivity in its class.

[DrWho]

KP-48=Eminence Magnum 15HO

Well not really....I just started with the Magnum 15HO and then tweaked

the T/S parameters to match the advertised performance of the KP-48. I've had a lot of

time playing with the KP-48, but alas no T/S parameters so the charts I

posted were just approximations.

However, the drivers do look strikingly similar and model up very

closely to the published specs. For example, the Eminence Magnum 15LF

behaves very similarly to the K-48E used in the Chorus II...

They are definetly close enough that I was able to do a little fudging to get the models "right"

[johnyholiday]

yea there close enuff,for this experment, going to throw this modeling

amp on top of the mess,smacked one around at GC ,crazy pole cat,there

is even a PC editer to go deep into the DSP engine via MIDI ,will be a

mood thing ,model one amp head, an a cab sim,rip some guitar or bass

acording to modeling,while also doing some super woofer duty to .1

channel of system ; for me perfect johny can jam any guitar

oreintated<sp tune, on the 7.1 plus quad cinema walky, talky next

week will get her going with a 67 Fender Bassman modleling ,then go to

this Budda amp Duke speaks highly about,...."KP amp modeling cab sim

guitar bass .1channel stack" nope just came too me" Klipsch KP V-ampire"

[johnyholiday]

An down the road cable this to V-ampre

[DrWho]

This going to be a bass guitar rig or a subwoofer for your system at home?