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Old 8th July 2006, 12:54 PM   #1
Jonhny is offline Jonhny  Sweden
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Default 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.
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Old 21st September 2009, 05:50 PM   #2
MartinQ is offline MartinQ  Canada
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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
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Old 25th September 2009, 02:44 AM   #3
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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
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Old 27th September 2009, 05:43 PM   #4
stewin is offline stewin  Kenya
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Default big brother sub

hi cowann what happened to the big brother hornsub 138 db at 25hz excellent sub
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Old 28th September 2009, 07:48 AM   #5
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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
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Old 10th October 2009, 12:37 AM   #6
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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
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Old 6th September 2013, 07:00 PM   #7
stewin is offline stewin  Kenya
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hi cowan how is sub jr compared to a 15"tapped horn?
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Old 6th September 2013, 07:20 PM   #8
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Quote:
Originally Posted by stewin View Post
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.
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Old 6th September 2013, 08:34 PM   #9
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Quote:
Originally Posted by weltersys View Post
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
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Old 6th September 2013, 09:06 PM   #10
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Quote:
Originally Posted by cowanaudio View Post
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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