Peerless xls 10 subwoofer 830452

BillyCool · 17th June 2008, 08:05 PM

Hi all,

Can someone please help me with the dimensions of a ported enclosure or a t.l. design of the above sub woofer. My electronics are not so good but i do very well with wood work.

Thanks to anyone that can help!

john k... · 18th June 2008, 12:27 AM

see the Peerless application notes

In summary ported:

Total volume: 26 litre
Port diameter: 70 mm
Port length: 930 mm

Tuning frequency: 25 Hz

Or passive radiaitor:

Total volume: 20 litre
XLS slave with 600g Mms
Tuning frequency: 21 Hz

MJL21193 · 18th June 2008, 02:06 AM

Quote:

Originally posted by john k...
see the Peerless application notes

In summary ported:

Total volume: 26 litre
Port diameter: 70 mm
Port length: 930 mm

Tuning frequency: 25 Hz

Or passive radiaitor:

Total volume: 20 litre
XLS slave with 600g Mms
Tuning frequency: 21 Hz

Translation: Go passive radiator. These XLS drivers are best suited for this.

Francec · 16th December 2008, 08:44 AM

Hi guys,
What is the upper frequency limit for this sub-woofer, please?

Frank

rabbitz · 16th December 2008, 10:23 AM

I'd keep it under 200Hz and mine is used only to 100Hz. These are used in the Orion for bass duty so pay to check out where they are cutting them off and what order xo.

http://www.linkwitzlab.com/

Undefinition · 16th December 2008, 12:53 PM

Quote:

Originally posted by MJL21193
Translation: Go passive radiator. These XLS drivers are best suited for this. [/B]

What does one gain by using the Passive Radiator for this sub? I've always wondered that.

richie00boy · 16th December 2008, 01:14 PM

No port noise or impossibly long vent.

rabbitz · 16th December 2008, 01:40 PM

Saves you using a very long port that you have to fit in the box so the advantage is significant in a small box. The smaller the box, the longer the port to achieve a low tuning frequency (Fb). To elimate chuffing by reducing the air velocity you need a large diameter port and the larger the diameter, the longer the port. Passive radiators save that hassle and are tuned with mass added to the cone but they do roll off quite differently.

Going by the Tymphany notes they are using a 70mm x 930mm port and most users would like at least 90mm diameter so the length is going to increase dramatically.... at least 1500mm long and try and fit that in a box easily.

Larger boxes do not have the same problems as with the same Fb the port is much shorter and more manageable. My 830452 is in a larger vented enclosure than shown on the Tymphany site, higher Fb than they used and a different flared port arrangement to achieve a small diameter and short length port.

Francec · 17th December 2008, 08:24 AM

rabbitz,
What size is your box? What is the upper frequency on the 830452?

Thanks,
Frank

rabbitz · 17th December 2008, 12:03 PM

Frank

My box is 40 litres with a Fb=27.5Hz. This sub is side firing with a downfiring port.

It's cut off at 100Hz by the HT LFE output.

17th June 2008, 08:05 PM	#1
BillyCool diyAudio Member Join Date: Jun 2008	Peerless xls 10 subwoofer 830452 Hi all, Can someone please help me with the dimensions of a ported enclosure or a t.l. design of the above sub woofer. My electronics are not so good but i do very well with wood work. Thanks to anyone that can help!

18th June 2008, 12:27 AM	#2
john k... diyAudio Member Join Date: Aug 2004 Location: US	see the Peerless application notes In summary ported: Total volume: 26 litre Port diameter: 70 mm Port length: 930 mm Tuning frequency: 25 Hz Or passive radiaitor: Total volume: 20 litre XLS slave with 600g Mms Tuning frequency: 21 Hz __________________ John k.... Music and Design NaO Dipole Loudspeakers. "We have no right to assume that any physical laws exist, or if they have existed up to now, that will continue to exist in a similar manner in the future." Max Planck

16th December 2008, 10:23 AM	#5
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	I'd keep it under 200Hz and mine is used only to 100Hz. These are used in the Orion for bass duty so pay to check out where they are cutting them off and what order xo. http://www.linkwitzlab.com/ __________________ No longer DIY active

16th December 2008, 01:14 PM	#7
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	No port noise or impossibly long vent. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

16th December 2008, 01:40 PM	#8
rabbitz diyAudio Member Join Date: Jul 2003 Location: Newcastle, Australia	Saves you using a very long port that you have to fit in the box so the advantage is significant in a small box. The smaller the box, the longer the port to achieve a low tuning frequency (Fb). To elimate chuffing by reducing the air velocity you need a large diameter port and the larger the diameter, the longer the port. Passive radiators save that hassle and are tuned with mass added to the cone but they do roll off quite differently. Going by the Tymphany notes they are using a 70mm x 930mm port and most users would like at least 90mm diameter so the length is going to increase dramatically.... at least 1500mm long and try and fit that in a box easily. Larger boxes do not have the same problems as with the same Fb the port is much shorter and more manageable. My 830452 is in a larger vented enclosure than shown on the Tymphany site, higher Fb than they used and a different flared port arrangement to achieve a small diameter and short length port. __________________ No longer DIY active


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16th December 2008, 08:44 AM	#4
Francec Banned Join Date: Jul 2006 Location: Port Melbourne, Australia	Hi guys, What is the upper frequency limit for this sub-woofer, please? Frank

17th December 2008, 08:24 AM	#9
Francec Banned Join Date: Jul 2006 Location: Port Melbourne, Australia	rabbitz, What size is your box? What is the upper frequency on the 830452? Thanks, Frank

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