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-   -   Cowan horn sub jr (http://www.diyaudio.com/forums/subwoofers/82817-cowan-horn-sub-jr.html)

Jonhny 8th July 2006 01:54 PM

Cowan horn sub jr
 
http://diy.cowanaudio.com/index.html

Has anyone tried this Horn sub Jr?
I tried a different horn for a 12" peerless a while ago. The horn was 3x the size of the sub Jr. My horn produced too much output between 33-40Hz compared to 40-80Hz. Maybe sub Jr will work better?

I will most likely be using a Beyma 15k200 or something similar.

MartinQ 21st September 2009 06:50 PM

I'm bumping this up because I'm curious about feedback on it and I know William is on the forum. I'm going to see what an Eminence BP102 looks like in this box.

http://www.cowanaudio.com/hornsubjr.html

cowanaudio 25th September 2009 03:44 AM

G'day Guys

Well I've tried a few of them :-)

In a domestic environment where they can be pointed into a corner, they work very well. A few hundred watts into one of these horns will give you some serious levels of high quality bass (flat from 40 to 150Hz). If they aren't faced into a corner, don't expect too much below 55Hz from them. They are a very compromised bass horn that really needs a corner to work as expected. Many 15" drivers seem to work well. Let hornresponse guide you.

Cheers

William Cowan

stewin 27th September 2009 06:43 PM

big brother sub
 
hi cowann what happened to the big brother hornsub 138 db at 25hz excellent sub

otto88 28th September 2009 08:48 AM

Hi William

I just checked http://www.etonesound.com/ and the Etone 135 is not listed.
They do have a 10 inch Etone 1020 for only $A 71! that sounds too cheap to be good?

Voice coil 50 mm (2.0 inch), high temperature copper wire
Sensitivity 98 dB/W/M

It’d need a revised design. But do these TS listed, seem suitable for 40 to 150 Hz
Fo 70 Hz
BL 17 TM
Qms 4.18
Qts 0.23
Vas 30 Litres

Thanks

cowanaudio 10th October 2009 01:37 AM

Don't stress over the Etone, there are a number of other drivers that work well. You'll be better of with a 15" anyway. Let Hornresponse guide you.

Cheers

William Cowan

stewin 6th September 2013 08:00 PM

hi cowan how is sub jr compared to a 15"tapped horn?

weltersys 6th September 2013 08:20 PM

Quote:

Originally Posted by stewin (Post 3622411)
hi cowan how is sub jr compared to a 15"tapped horn?

As William said four years ago: "Let hornresponse guide you".
Also:
" If they aren't faced into a corner, don't expect too much below 55Hz from them. They are a very compromised bass horn that really needs a corner to work as expected."

Comparing a corner horn to (which of the dozens?) a 15" tapped horn is useless.

cowanaudio 6th September 2013 09:34 PM

Quote:

Originally Posted by weltersys (Post 3622440)
As William said four years ago: "Let hornresponse guide you".
Also:
" If they aren't faced into a corner, don't expect too much below 55Hz from them. They are a very compromised bass horn that really needs a corner to work as expected."

Comparing a corner horn to (which of the dozens?) a 15" tapped horn is useless.

Couldn't have summed it up better myself.

One noteable difference worth noting is that a FLH offers better driver protection below cutoff. Today when we routinely use DSP to manage loudspeaker systems that probably doesn't matter either.

Cheers

William Cowan

weltersys 6th September 2013 10:06 PM

Quote:

Originally Posted by cowanaudio (Post 3622520)
Couldn't have summed it up better myself.

One noteable difference worth noting is that a FLH offers better driver protection below cutoff. Today when we routinely use DSP to manage loudspeaker systems that probably doesn't matter either.

Cheers

William Cowan

William,

Funny, I designed a 2x10" FLH similar to the Horn sub Jr, back around 2000 a loose amplifier power supply capacitor temporarily shorted (full DC PSU voltage to the speakers) and caused the speakers to tear due to the air resistance the chambers provided.
Sounded like a shotgun.
All the voice coils were intact, I was able to glue on rings of "donor" cones to repair the speakers.

Although a small FLH chamber reduces excursion below FC, it does not always mean more protection, I think the speakers may have survived in a BR or TH.


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