Visit to Audiophile Bill to hear his horns project

[Audiophile Bill]

Nominal 6 and 8 ohms, but what are the deepest dips on both?

Woofer 7ohms at 200hz - rest is above. It is actively driven with 500 watts in my system but can be given 2400 watts if you really wanted to go mad.

AER is flat other than in the lowest register where the impedance increases (not decreases) a lot. Of no consequence to me though since it is very well below the horn crossover.

Take home message - easy to drive hence why I can use 1.25 watts on it.

 

[christoph]

Woofer 7ohms at 200hz - rest is above. It is actively driven with 500 watts in my system but can be given 2400 watts if you really wanted to go mad.

AER is flat other than in the lowest register where the impedance increases (not decreases) a lot. Of no consequence to me though since it is very well below the horn crossover.

Take home message - easy to drive hence why I can use 1.25 watts on it.

Thanks Bill

 

[adyc]

Can I ask what amp do you use to drive the woofer?

 

[Audiophile Bill]

Can I ask what amp do you use to drive the woofer?

It is a British designed mosfet class AB amplifier. Functionality includes phase adjustment from 0-180, high level and low level input, custom designed (adjustable) crossover for my application, and level.

Best.

 

[cal3713]

Woofer 7ohms at 200hz - rest is above. It is actively driven with 500 watts in my system but can be given 2400 watts if you really wanted to go mad.

AER is flat other than in the lowest register where the impedance increases (not decreases) a lot. Of no consequence to me though since it is very well below the horn crossover.

Take home message - easy to drive hence why I can use 1.25 watts on it.

Do you have a cap on the driver to roll off the LF, or does the horn take care of that?

 

[Audiophile Bill]

Do you have a cap on the driver to roll off the LF, or does the horn take care of that?

Horn

 

[spiritofmusic]

I remain amazed by this. YGs, Alsyvoxs etc require suitcase-sized crossovers needing two men to lift them (or is that their wives Lol)...this horn doesn't even need a crossover the size of your hand.

 

[cal3713]

I remain amazed by this. YGs, Alsyvoxs etc require suitcase-sized crossovers needing two men to lift them (or is that their wives Lol)...this horn doesn't even need a crossover the size of your hand.

Well, to be fair, that huge horn is doing both amplifier and crossover duties (just like the subwoofer amps!), and it does appear to be quite large...

~~~~

God, if I still lived in the States a pair of BD4s would be on the way to my house right now. I would hate my job, but still...

What a great project Bill! As you can tell, I'm a complete convert. Perhaps I'll get lucky and find a decent paying remote position this winter.

 

[pjwd]

Horn

Bill
What order xover do you use on woofer - just interested in phase issues

Phil

 

[Audiophile Bill]

Bill
What order xover do you use on woofer - just interested in phase issues

Phil

Will pm

 

[Audiophile Bill]

Made up the Neutrik dc cables today and received the linear supplies. Just ran some tests just now and with 12 volts the force is such that a spoon would pull the entire 17kg mass along the desktop

 

[Lagonda]

Made up the Neutrik dc cables today and received the linear supplies. Just ran some tests just now and with 12 volts the force is such that a spoon would pull the entire 17kg mass along the desktop

View attachment 80140
View attachment 80141

I guess this driver is not an option if you have piercings !

 

[Audiophile Bill]

I guess this driver is not an option if you have piercings !

I guess this driver is not an option if you have piercings !

Yeah you wouldn’t want to dangle something near that pole

 

[spiritofmusic]

Pity the poor audiophile with a Prince Albert!

 

[christoph]

Pity the poor audiophile with a Prince Albert!

You're a kinky one
Who would have guessed

 

[spiritofmusic]

I read...

 

[spiritofmusic]

Basically this is gonna be a horn spkr combined w MRI scanner if that magnet is to be believed.

 

[Lagonda]

You're a kinky one
Who would have guessed

Marc is a true British Royalist, Prince Albert is a must !

 

[DaveC]

I saw these and thought of you Bill. If I had the space I'd buy them for sure.

Giant rare pair of 1920s RCA theater front horns fits fullrange drivers 5-8 inch size - Photo2277212

www.usaudiomart.com

 

[Audiophile Bill]

I saw these and thought of you Bill. If I had the space I'd buy them for sure.

Giant rare pair of 1920s RCA theater front horns fits fullrange drivers 5-8 inch size - Photo2277212

www.usaudiomart.com

Yeah I saw those before too. If they were in U.K., I would likely have been interested lol. They belong to John Kalinowski.