Peerless 830845 in Sealed Enclosure - screenshots included

harrisni · 12th March 2008, 02:02 PM

I've been doing some modelling with unibox using a Peerless XXLS 12" 830845.

40L - 20hz @ 99.5dB
60L - 20hz @ 102dB
80L- 20hz @ 103dB

Using 500Watts input via a Redgum Plate Amplifier

40L

60L

80L

From the specs it should be to bad at home theatre and/or music, what you guys think?

richie00boy · 12th March 2008, 02:32 PM

What is Xmax on this driver? If it's 13mm it looks like you are overdriving it.

Are you prepared to use any EQ? That can add a new slant on box size (smaller) if the voicecoil thermal capacity is big enough and you have enough power.

harrisni · 12th March 2008, 02:33 PM

Hi,

Its 12.5 xmax.... I was just lookng at the pics and thinking the same thing!!

Silly me!

Really only needs 40L with 250Watts to hit xmas which is about 95db at 20hz

harrisni · 12th March 2008, 02:47 PM

What you think?

richie00boy · 12th March 2008, 03:13 PM

Looks OK to me. You could increase box size a bit more (say 60 litres) and get a bit lower without needing any EQ, and have a bit smoother response and need less power. But as it is it's not bad performance from a sealed 40 litre cab.

harrisni · 12th March 2008, 03:17 PM

harrisni · 13th March 2008, 12:26 AM

Hows this one look:

Comparing it to a subwoofer I was looking to purchase.

Velodyne SPL-1500R @ $3000

Velodyne DD14 @ $5000

Pound for pound it looks the same to me or am I missing something?????

richie00boy · 14th March 2008, 11:09 AM

Well the frequency response may be similar, but you haven't compared phase, SPL capability or any dynamic attributes.

cowanaudio · 6th April 2008, 10:09 PM

G'day Nick

You've been asking quite a few questions about the Peerless XXLS drivers here lately. Drop me a mail and you can have a listen to mine.

Have a look at http://www.cowanaudio.com

Cheers

William Cowan

12th March 2008, 02:02 PM	#1
harrisni diyAudio Member Join Date: Aug 2006	Peerless 830845 in Sealed Enclosure - screenshots included I've been doing some modelling with unibox using a Peerless XXLS 12" 830845. 40L - 20hz @ 99.5dB 60L - 20hz @ 102dB 80L- 20hz @ 103dB Using 500Watts input via a Redgum Plate Amplifier 40L 60L 80L From the specs it should be to bad at home theatre and/or music, what you guys think?

12th March 2008, 02:32 PM	#2
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	What is Xmax on this driver? If it's 13mm it looks like you are overdriving it. Are you prepared to use any EQ? That can add a new slant on box size (smaller) if the voicecoil thermal capacity is big enough and you have enough power. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

12th March 2008, 03:13 PM	#5
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Looks OK to me. You could increase box size a bit more (say 60 litres) and get a bit lower without needing any EQ, and have a bit smoother response and need less power. But as it is it's not bad performance from a sealed 40 litre cab. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

14th March 2008, 11:09 AM	#8
richie00boy Did it Himself diyAudio Member Join Date: Nov 2003 Location: Gloucestershire, England, UK	Well the frequency response may be similar, but you haven't compared phase, SPL capability or any dynamic attributes. __________________ www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more

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12th March 2008, 02:33 PM	#3
harrisni diyAudio Member Join Date: Aug 2006	Hi, Its 12.5 xmax.... I was just lookng at the pics and thinking the same thing!! Silly me! Really only needs 40L with 250Watts to hit xmas which is about 95db at 20hz

12th March 2008, 02:47 PM	#4
harrisni diyAudio Member Join Date: Aug 2006	What you think?

12th March 2008, 03:17 PM	#6
harrisni diyAudio Member Join Date: Aug 2006

13th March 2008, 12:26 AM	#7
harrisni diyAudio Member Join Date: Aug 2006	Hows this one look: Comparing it to a subwoofer I was looking to purchase. Velodyne SPL-1500R @ $3000 Velodyne DD14 @ $5000 Pound for pound it looks the same to me or am I missing something?????

6th April 2008, 10:09 PM	#9
cowanaudio diyAudio Member Join Date: Jul 2004 Location: Canberra, Australia	G'day Nick You've been asking quite a few questions about the Peerless XXLS drivers here lately. Drop me a mail and you can have a listen to mine. Have a look at http://www.cowanaudio.com Cheers William Cowan

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