Altec Voice of Theatre Freq Response roll on / bass

[inertial]

hi, anyone can show me the BASS roll/on - in room - of the VOT??

thank sin advanced

cheers

P.S.:mine friend need a supersub!!

 

[djn]

I never got mine down below 60hz-ish. I was running the 515s. They needed subs, but where great midbass horns.

 

[inertial]

OK,
Thanks

60 Hz 2nd order??

Cheers

 

[djn]

Not sure what you are asking, but I let them roll off into the subs without a crossover on the Altec going down, just the subs going up.

 

[inertial]

I 'm asking if the natural roll on of the woofer - in room - is 60 Hz , 2 nd order
high / pass ...

cheers

 

[gk7]

... 2nd order??

It´s a ported box. For a "HEAD DESIGNER" you ask rather strange questions ...

 

[djn]

There is a mod somewhere on the net where you close off the bottom of the A7 and fill in the inside side flares so you turn it into a compression horn which raises the low end rolloff, but then you put an 18" JBL sub driver in the bottom. I heard it once and was very impressed and was going to do the same to my rig, but sold it and bought the Edgarhorns.

 

[inertial]

It´s a ported box. For a "HEAD DESIGNER" you ask rather strange questions ...

yes,
excuse my ignorance about VOT,
I design direct radiation hi-fi speakers, only!

so 60 Hz 4th order high / pass?

cheers

 

[inertial]

There is a mod somewhere on the net where you close off the bottom of the A7 and fill in the inside side flares so you turn it into a compression horn which raises the low end rolloff, but then you put an 18" JBL sub driver in the bottom. I heard it once and was very impressed and was going to do the same to my rig, but sold it and bought the Edgarhorns.

thanks
interesting, but mine friend want a separate big mono subwf ! biamp of course..


anyone can show this freq response of the VOT??

cheers

 

[Pano]

With the stock (large) ports they don't go down very low. If the ports are better tuned, you can get almost another octave. In room response of mine has an F3 in the 30s. I'll dig up a response curve for you later today, after work.

But an F3 circa 50 Hz is common. These are not what I would call a "Supersub".

 

[inertial]

THANKS PANO, YOU ARE VERY KIND

THE VOT of mine friend have the standard / normal tuned ports,
so please can you share that curve?

cheers

 

[GM]

The first plot is a factory measured 2pi space response: http://www.lansingheritage.org/images/altec/specs/components/515g/page3.jpg

This may help too: http://www.hostboard.com/forums/f70...-project-support-your-altecs.html#post1884480

GM

 

[weltersys]

With the stock (large) ports they don't go down very low. If the ports are better tuned, you can get almost another octave. In room response of mine has an F3 in the 30s. I'll dig up a response curve for you later today, after work.

But an F3 circa 50 Hz is common. These are not what I would call a "Supersub".

Depending on the driver loaded, 50,55,60 Hz according to the old spec sheet.

The Klipsch measurement must have been using the 515-8GHP, it drops like a rock below 60 Hz.

 

[inertial]

Thanks guys
seems to me a 24dB/oct H/P
so my sub must be 4th order L/P about 60 hz , to say...

cheers

 

[weltersys]

Thanks guys
seems to me a 24dB/oct H/P

More or less, depending on the driver used.

If you want to properly integrate a sub with an A7 you are going to need to measure the specific A7, or you will just be guessing what it's response actually is.
The in room response of your pair of A7 will likely be different from any response you find posted on the web.

 

[inertial]

YES, absolutely,
but now i know + / - what expect...

thanks

cheers

 

[Pano]

This shows my modified Altec A5 speakers at the listening position. F3 is not as low as I thought, looks here like 40Hz.

 

[bear]

What are you trying to do with the old VOT speakers?

 

[inertial]

thank pano, but yours is modded ,so not my case....

Bear,
I only want help a friend of mine which is not satisfied by VOT bass depht.

He want an active subwoofer with 3182 for complte the system..

cheers

 

[doctordata]

Big Room needed

hi, anyone can show me the BASS roll/on - in room - of the VOT??

thank sin advanced

cheers

P.S.:mine friend need a supersub!!

I was the lucky owner of the Altec Voices in the seventies . They need a lot of Room ! in a small room they wont show their pedigree !The "Theatre" says enough . Used them for my drive in Disco fed with Dynaco stereo 400 and a couple of Lenco L75's with Shure L75's ? on some Dynacord mixer . Sounded great in anything larger then 200 square meters , below that they sounded very thin .

Cheers ,

Rens