K-55-V Driver Specifications

[wvu80]

@Deangis one of our resident authorities on crossovers, along with Bob Crites @BECso anything they tell you will be better than anything I tell you.

 

As Dean said the K-55V cross over points are 400 to 6000 in the Klipschorn (Khorn) or La Scala using the Type AA cross over network.  There is a known dip in the frequency response in the K-55V in the 4500 Hz to 6000 Hz that was corrected with the K-55M.  Most people can't hear the dip (I couldn't) but it concerned people.

 

The K-55V can be crossed over lower to avoid the dip but the fragile K-77 tweeter could not handle being crossed over any lower than 6000 Hz.  The solution involved two things.  A different crossover was offered by Crites called the A/4500.  That lowered the cross over point from 6000 to 4500 Hz to avoid that dip.  The second thing needed was a more robust tweeter that could handle the lower cross over point safely.  Crites offered the CT-120 and CT-125 tweeters that most people bought with the A/4500 cross over.

 

I had the Crites A/4500 to replace my Type AA and it sounded excellent.  I used another tweeter and horn combination of my choosing and put it on top of the 1978 Khorn for time alignment reasons. 

 

This is the Denovo DNA-360 and SEOS 12" Waveguide on top of my Khorns. (picture coming)

 

 

 

 

 

[JohnA]

Adapters

https://www.parts-express.com/Search.aspx?keyword=horn adapter&sitesearch=true

 

A K55-V can be run down to 110 Hz, as stated in the Atlas literature, on the right horn.  Most will respond adequately to 6000 Hz, again, on the right horn.  Without hard data, I suspect the '80s era 2-piece phase plug K-55-V will not respond down to 110 Hz.  Not knowing how much closer the diaphragm is to the phase plug, I don't even know how to guess. 

 

The K-77-? can safely respond down to 3500 Hz, as its original name, T-35, implies, but requires a steep crossover slope and a power limit of about 10 watts (2 for k-77).  These are not practical limits in a 200 wpc world. 

 

The way Mr. Jansz words his questions makes it entirely unclear what he really wants. 

[Frank Jansz]

On Wednesday, August 22, 2012 at 2:49 AM, floroflores said:

Hey y'all!

I recently bought a nice pair of K-55-V drivers. The only thing I know is that the frequency range starts at 400 Hz. I have already been browsing through the archive here but couldn't find a complete specs sheet or such. Can anyone help me out?

Thanks guys!

I musel own The K 55 V 1"Throat Drivers and i have coupled it to the JBLl 2386 A Horn Flares which works down to 350 Hz i Use a 3 Way all Tube Active Crossover Model Luxman A2003. And i got the crossover set from 500 Hz to 4000 Hz which sounds great the K 55 Driver works from 400 Hz to around 6000 Hz . In my case i believe from 500 hz to a Maximum of 5000 hz will be Great as after 5000 hz it seems to start Fading off thats why i crossover from 500 to 4000 hz . My tweeter  which is the JBL Super Bullet works down to 2.500 KHz i start it at 4000 khz to infinity 

[Frank Jansz]

On Tuesday, September 18, 2018 at 10:24 AM, JohnA said:

Adapters

https://www.parts-express.com/Search.aspx?keyword=horn adapter&sitesearch=true

 

A K55-V can be run down to 110 Hz, as stated in the Atlas literature, on the right horn.  Most will respond adequately to 6000 Hz, again, on the right horn.  Without hard data, I suspect the '80s era 2-piece phase plug K-55-V will not respond down to 110 Hz.  Not knowing how much closer the diaphragm is to the phase plug, I don't even know how to guess. 

 

The K-77-? can safely respond down to 3500 Hz, as its original name, T-35, implies, but requires a steep crossover slope and a power limit of about 10 watts (2 for k-77).  These are not practical limits in a 200 wpc world. 

 

The way Mr. Jansz words his questions makes it entirely unclear what he really wants. 

Dear Friend i dont use The K 77 Tweeter. Instead i use the JBL 2402 Super Bullet and i cross it with a Class A 211 Tube Mono Block Amp from 4000 Hz to infinity. I think that the JBL 2402 works from 2500 hz to around 18.000KHz 

[OO1]

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[Deang]

33 minutes ago, Randyh said:

The EV T350 is definitely the best tweeter ever made -3500HZ to 18khz  ...

No, it’s not. Seriously?

[OO1]

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[Deang]

The 2402 he’s using is much better.

 

The B&C de120 will also kick the crap out of it. 

 

So does the Beyma CP-25.

 

There are now two very nice drop in replacements using the de120.

[OO1]

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[Deang]

Well, the driver is reasonably priced, but then you need the horn, and not just any horn - it needs to be able to fit into the cut out - and clear the K-400. 

 

Yeah, extreme power for where they’re being crossed over at - and they sound better while doing it. Not just better extension, but lower distortion too. 

 

 

[OO1]

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[Deang]

Bob’s solution uses the same driver, and I approve of it as well - it might even load the driver better. Which reminds me - I need to call him. 

 

@Dave A has put forth an amazing product. Fit and finish for the price is nothing short of amazing. 

[OO1]

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[OO1]

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[brians7]

On 9/19/2018 at 10:09 PM, dasanto2 said:

Thanks to everyone for your encouraging comments. I have just dropped the price 200 dollars. 

 

1 hour ago, Deang said:

Well, the driver is reasonably priced, but then you need the horn, and not just any horn - it needs to be able to fit into the cut out - and clear the K-400. 

 

Yeah, extreme power for where they’re being crossed over at - and they sound better while doing it. Not just better extension, but lower distortion too. 

 

 

Dean how about http://www.usspeaker.com/beyma CP385ND-1.htm it looks like a nice driver.

[Deang]

If it fits, sure - it measures nice.

[Dave A]

16 hours ago, Randyh said:

Bob's driver is just so perfect fitting , no one even notices the difference , plus it needs no modifications -tx Dean for your input , I dont know what Dave's driver is going for , it's the investment in the machinery that is staggering here , to produce such a horn -Dave's gotta have some serious equipment -

I am priced very close to Bob's DE120 setup but mine will allow you to use many more drivers if you care to experiment. I also will sell just the horn lenses and you can use your own drivers IF they fit in the restricted space typical for the K-77's. JBL and Beyma make 1 3/8 18tpi drivers for instance small enough to work here and I am sure there are others to. The B&C DE110 will also fit and is smaller than the DE120 if Klipsch crowded the top of the cabinet with their cutout. One KHorn buyer did have this problem on one of his cabinets where Klipsch was not consistent in their pre CNC days.

 

On the larger tweeter lens set you can use a TON of drivers. The DE110, DE120, DE10 and anything with a two hole 1/4 20 3" diameter bolt hole pattern and the 1 3/8 18 threaded snout drivers which is the same size as the K-55-V for instance. A lot of guys liked the ASD 1001 for their Cornscalla builds and the two hole or threaded snout versions will both fit here. Faital, Eminence, Beyma and B&C all make drivers that will fit these although I am certain not all will work right for this horn size. The discovery process is going on to find the good ones as we speak.

[OO1]

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[Dave A]

I have no idea where that $200.00 drop came from because my price has not changed. Where are you seeing such a thing?

 

[Frank Jansz]

On 9/10/2018 at 10:10 PM, Deang said:

The cut-off is determined by the horn. What horn are you using?

 

Which speaker? For example, the Klipschorn bass bin won’t reach 500Hz. 

 

The driver itself will go from 400-6000 without any problem - on the right horn. 

I am using the JBL 2308 A Horn Flare and it states that it starts at around 4 Hz to around 7000khz 

RGDS

Frank Jansz