Lowther drivers for Big Fun horns

Rafal · 4th July 2012, 12:14 AM

Hi,

I would like to build nice, large Lowther horns and narrowed it down to Acousta 116 and Big-Fun. I am leaning towards the Big-Fun but I can't find anywhere which Lowther driver is suitable for this cabinet. I would be very grateful if someone could advise me or point me to the source of info on this topic.

I would also be very interested in your impressions re. Big-Fun and Acousta 116 Lowthers.

Cheers,

Rafal

talaerts · 4th July 2012, 02:20 AM

I remember that the designer of the Big Fun used the entry level Lowther PM6C driver.
And, also from memory as I don't have the saved webpages with the full design approach here (I believe they're not online anymore unfortunately), that it was a "common sense" design using just a few formulas (not the result of extensive computer modeling), in which the characteristics of the different lowther models won't make much difference. Which doesn't mean that they'll all be excellent in the box.

Rafal · 4th July 2012, 02:32 PM

Thanks talaerts,

What would be the most ideal lowther for this box. Does anyone have some suggestions?

Cheers,

R.

talaerts · 4th July 2012, 03:00 PM

I remember that the designer was very happy with his PM6C in it.

DrBoar · 4th July 2012, 09:10 PM

Bigfun is here bigfunht
A big horn with a mouth area of 0.7 m2 while the Accousta has a 0.12 m2 mouth a far smaller hybrid horn/pipe type. I have built the Lowther Accousta 115 and found it very bass light.

I would go for the big fun horn, and not worry much about if the driver fit the horn, simulationas and measurement indicate that horns are quite robust as far as driver parameters go (Klang & Ton Schmacks horn).

If the big horn is to big look at the Jericho 08 from hobby HiFi in 2008 issue 2, with an mouth area of 0.2 m2 it is a step up from the A116.

Rafal · 4th July 2012, 10:43 PM

Thanks DrBoar and talaerts,

I think I'll attempt the Big Fun horns. Now, which driver to chose. I'm leaning towards EX3 or 4, DX 3 or 4, or PM2A. Which would you suggest?

Cheers,

R.

talaerts · 5th July 2012, 06:24 AM

I don't have much hands-on experience with lowther, only listened to them a few times so I can hardly give you precise advice there.
What I read: in general some people find that the absorption at the back of the EX drivers takes some of the life out of the driver.
In the DX series, people often find the DX3 to occupy the best quality/price.

My own take, when spending the price of the *X4 drivers, I recommend to also check out AER and Voxativ drivers. Excellent stuff.
i also recommend to redesign the front panel of the big fun a bit so that you can use a replaceable mounting baffle, allowing you to swap drivers, even towards non-lowther ones.

DrBoar · 5th July 2012, 10:48 PM

All Lowthers I have seen measured have had a large boost in the 2kHz and upwards range, it gives a shouty forward sound. Voxativ is in a totaly different legue than Lowther, sound and manufacturing wise. Have you looked into the the Seas full ranges?

Nelson Pass · 5th July 2012, 10:56 PM

IMHO you want the PM6A with the 16 ohm silver voice coil.

I like them best in OB's, and I occasionally notch them -2 dB at 2 KHz, but
these particular drivers don't come across as shouty.

The SEAS full range drivers are nice, but not the same thing. They are
subjectively more along the lines of Fostex or AN in the upper frequencies.

The SEAS are particularly useful when you want some actual bass out of a
sealed or BR box and want to stick with a single driver instead of adding a
woofer.

Rafal · 6th July 2012, 01:31 AM

Lowther in OB? that sounds interesting! I tried some full range drivers in OB like fr125s and visaton b200 and really liked the lack of coloration but the bass was lacking. I would assume that the lowthers would have to be augmented with a bass drivers. The "box" construction would be simple though.

4th July 2012, 12:14 AM	#1
Rafal diyAudio Member Join Date: Nov 2003 Location: London Ontario	Lowther drivers for Big Fun horns Hi, I would like to build nice, large Lowther horns and narrowed it down to Acousta 116 and Big-Fun. I am leaning towards the Big-Fun but I can't find anywhere which Lowther driver is suitable for this cabinet. I would be very grateful if someone could advise me or point me to the source of info on this topic. I would also be very interested in your impressions re. Big-Fun and Acousta 116 Lowthers. Cheers, Rafal

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4th July 2012, 02:20 AM	#2
talaerts diyAudio Member Join Date: Oct 2005	I remember that the designer of the Big Fun used the entry level Lowther PM6C driver. And, also from memory as I don't have the saved webpages with the full design approach here (I believe they're not online anymore unfortunately), that it was a "common sense" design using just a few formulas (not the result of extensive computer modeling), in which the characteristics of the different lowther models won't make much difference. Which doesn't mean that they'll all be excellent in the box.

4th July 2012, 02:32 PM	#3
Rafal diyAudio Member Join Date: Nov 2003 Location: London Ontario	Thanks talaerts, What would be the most ideal lowther for this box. Does anyone have some suggestions? Cheers, R.

4th July 2012, 03:00 PM	#4
talaerts diyAudio Member Join Date: Oct 2005	I remember that the designer was very happy with his PM6C in it.

4th July 2012, 09:10 PM	#5
DrBoar diyAudio Member Join Date: Apr 2003 Location: Stockholm	Bigfun is here bigfunht A big horn with a mouth area of 0.7 m2 while the Accousta has a 0.12 m2 mouth a far smaller hybrid horn/pipe type. I have built the Lowther Accousta 115 and found it very bass light. I would go for the big fun horn, and not worry much about if the driver fit the horn, simulationas and measurement indicate that horns are quite robust as far as driver parameters go (Klang & Ton Schmacks horn). If the big horn is to big look at the Jericho 08 from hobby HiFi in 2008 issue 2, with an mouth area of 0.2 m2 it is a step up from the A116.

4th July 2012, 10:43 PM	#6
Rafal diyAudio Member Join Date: Nov 2003 Location: London Ontario	Thanks DrBoar and talaerts, I think I'll attempt the Big Fun horns. Now, which driver to chose. I'm leaning towards EX3 or 4, DX 3 or 4, or PM2A. Which would you suggest? Cheers, R.

5th July 2012, 06:24 AM	#7
talaerts diyAudio Member Join Date: Oct 2005	I don't have much hands-on experience with lowther, only listened to them a few times so I can hardly give you precise advice there. What I read: in general some people find that the absorption at the back of the EX drivers takes some of the life out of the driver. In the DX series, people often find the DX3 to occupy the best quality/price. My own take, when spending the price of the *X4 drivers, I recommend to also check out AER and Voxativ drivers. Excellent stuff. i also recommend to redesign the front panel of the big fun a bit so that you can use a replaceable mounting baffle, allowing you to swap drivers, even towards non-lowther ones.

5th July 2012, 10:48 PM	#8
DrBoar diyAudio Member Join Date: Apr 2003 Location: Stockholm	All Lowthers I have seen measured have had a large boost in the 2kHz and upwards range, it gives a shouty forward sound. Voxativ is in a totaly different legue than Lowther, sound and manufacturing wise. Have you looked into the the Seas full ranges?

5th July 2012, 10:56 PM	#9
Nelson Pass The one and only Join Date: Mar 2001	IMHO you want the PM6A with the 16 ohm silver voice coil. I like them best in OB's, and I occasionally notch them -2 dB at 2 KHz, but these particular drivers don't come across as shouty. The SEAS full range drivers are nice, but not the same thing. They are subjectively more along the lines of Fostex or AN in the upper frequencies. The SEAS are particularly useful when you want some actual bass out of a sealed or BR box and want to stick with a single driver instead of adding a woofer.

6th July 2012, 01:31 AM	#10
Rafal diyAudio Member Join Date: Nov 2003 Location: London Ontario	Lowther in OB? that sounds interesting! I tried some full range drivers in OB like fr125s and visaton b200 and really liked the lack of coloration but the bass was lacking. I would assume that the lowthers would have to be augmented with a bass drivers. The "box" construction would be simple though.