3 way sealed loudspeaker design

dih1118 · 4th September 2003, 07:57 PM

Hello all.

I was wondering if anyone could help me with the design for a 3 way sealed loudspeaker. It needs to have a curve +/- 3db from 50Hz to 18Khz, have an 8 ohm nominal impedance, and handle 100W.

Perhaps you could provide me with good reading material and software? I'd rather have the actual modeling equations.

Thanks
-David

Mos Fetish · 5th September 2003, 01:44 AM

Download WinISD (just do a search)

Model the Peerless 850146 in a closed box.

Mid/tweeter? Maybe something safe like the Vifa P13/D27.

Low cost. Pretty much foolproof in a sealed box with that combo.

best of luck.

Mos

5th element · 5th September 2003, 02:20 AM

Peerless 146 sealed box approx 66 litres plays very low in room with useful output below 30 Hz. Active xover it if poss. I have sounds wonderful. Only downside is that xovered at 300hz does not match detail on a W15cy001 lowering xover to 150hz gave a more detailed sound. Getting the Excel 10" would solve this but has less xmax so not as good at just bass. But with a p13/d27 combo instead of a w15/ssd2905/95 your not going to run into trouble.

Appart from going subwoof your not going to find a better bass speaker, not unless someone can point me in the direction of a better speaker around the same price with better specs. I know about the 727, but from what ive heard it doesnt bottom out as gracefully as the 146.

The vifa mid/bass is also very good easy to work with.

Mos Fetish · 5th September 2003, 05:23 AM

Hi 5th

Two questions:

How much excursion are you getting from that 146 in 66ls at higher power levels?

Did you have to mess around with the damping a lot and what did you end up with?

Mos

LageB · 5th September 2003, 07:51 AM

I am also planning CSX 10" in a sealed 60L cabinette with XO 150Hz...(active) but I do have same concern regarding cone excursion at high power levels - what is your experince 5th element ? Do you use subsonic filter ?

LageB

navin · 6th September 2003, 05:21 AM

Quote:

Originally posted by dih1118
Hello all.

I was wondering if anyone could help me with the design for a 3 way sealed loudspeaker. It needs to have a curve +/- 3db from 50Hz to 18Khz, have an 8 ohm nominal impedance, and handle 100W.

Perhaps you could provide me with good reading material and software? I'd rather have the actual modeling equations.

Thanks
-David

try this...
Drivers for first speakers

also why are you concerned with a 3way. 3 way XOs are more diffcult to get right. i wold look at a 2.5 way. better still a push push 2.5 way using say 2 6-7" woofers and a nice 1". the 2 woofers could then be in a TL. dave (planet 10) got me addicted to this concept. now i consider it to be the best simple sytem one can build. only thing is that the boxes are usually too large for rear channels.

dih1118 · 9th September 2003, 04:59 AM

Thank you everyone for all of your suggestions. Sorry, but the design will be a 3 way sealed enclosure.

Do you have any recommendations for a cheaper setup the Peerless/Vifa/Vifa? I was trying to keep the speakers under $100 per enclosure.

Also, does anyone one have any suggestions for the crossover points and type? I was thinking about using 3rd order filters, but I've been reading that the filter with the highest slope may not be the optimal solution.

Thanks

dih1118 · 10th September 2003, 04:24 AM

TTT - anyone?

navin · 10th September 2003, 04:35 AM

dont limit yourself.

1. 3 ways is not nesscarily better than 2 way or 2.5 way or 4 way

2. Why 3rd order XOs? The XO depends on the drivers involved

look at the solution not a particular technology

dih1118 · 10th September 2003, 05:31 AM

3 way is what I want do, and is the design I'm interested in. Is their an easier and better way - probably. But I want to do a 3 way enclosure.

Could you point me to a website that will help determine the proper order and cutoff frequency for the crossover?

4th September 2003, 07:57 PM	#1
dih1118 diyAudio Member Join Date: Dec 2001	3 way sealed loudspeaker design Hello all. I was wondering if anyone could help me with the design for a 3 way sealed loudspeaker. It needs to have a curve +/- 3db from 50Hz to 18Khz, have an 8 ohm nominal impedance, and handle 100W. Perhaps you could provide me with good reading material and software? I'd rather have the actual modeling equations. Thanks -David

10th September 2003, 04:35 AM	#9
navin diyAudio Member Join Date: Jan 2002 Location: Mumbai (Bombay), India	dont limit yourself. 1. 3 ways is not nesscarily better than 2 way or 2.5 way or 4 way 2. Why 3rd order XOs? The XO depends on the drivers involved look at the solution not a particular technology __________________ ...still looking for the holy grail.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Hi-End Sealed MTM Bookshelf Design?	treytexag	Multi-Way	35	15th July 2008 07:34 PM
Should I Try A DIY 12 or 15" Sealed Design??	Fore	Subwoofers	34	12th September 2007 01:37 AM
Mid/Bass Driver QTS for Sealed Box Loudspeaker?	bssk	Multi-Way	0	7th November 2006 06:57 AM
Sealed ESL Design for DIYers	Altaic	Planars & Exotics	26	7th November 2002 08:51 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

5th September 2003, 01:44 AM	#2
Mos Fetish diyAudio Member Join Date: Feb 2003 Location: New Zealand	Download WinISD (just do a search) Model the Peerless 850146 in a closed box. Mid/tweeter? Maybe something safe like the Vifa P13/D27. Low cost. Pretty much foolproof in a sealed box with that combo. best of luck. Mos

5th September 2003, 02:20 AM	#3
5th element diyAudio Member Join Date: Oct 2002 Location: England	Peerless 146 sealed box approx 66 litres plays very low in room with useful output below 30 Hz. Active xover it if poss. I have sounds wonderful. Only downside is that xovered at 300hz does not match detail on a W15cy001 lowering xover to 150hz gave a more detailed sound. Getting the Excel 10" would solve this but has less xmax so not as good at just bass. But with a p13/d27 combo instead of a w15/ssd2905/95 your not going to run into trouble. Appart from going subwoof your not going to find a better bass speaker, not unless someone can point me in the direction of a better speaker around the same price with better specs. I know about the 727, but from what ive heard it doesnt bottom out as gracefully as the 146. The vifa mid/bass is also very good easy to work with.

5th September 2003, 05:23 AM	#4
Mos Fetish diyAudio Member Join Date: Feb 2003 Location: New Zealand	Hi 5th Two questions: How much excursion are you getting from that 146 in 66ls at higher power levels? Did you have to mess around with the damping a lot and what did you end up with? Mos

5th September 2003, 07:51 AM	#5
LageB diyAudio Member Join Date: Nov 2002 Location: Sweden	I am also planning CSX 10" in a sealed 60L cabinette with XO 150Hz...(active) but I do have same concern regarding cone excursion at high power levels - what is your experince 5th element ? Do you use subsonic filter ? LageB

9th September 2003, 04:59 AM	#7
dih1118 diyAudio Member Join Date: Dec 2001	Thank you everyone for all of your suggestions. Sorry, but the design will be a 3 way sealed enclosure. Do you have any recommendations for a cheaper setup the Peerless/Vifa/Vifa? I was trying to keep the speakers under $100 per enclosure. Also, does anyone one have any suggestions for the crossover points and type? I was thinking about using 3rd order filters, but I've been reading that the filter with the highest slope may not be the optimal solution. Thanks

10th September 2003, 04:24 AM	#8
dih1118 diyAudio Member Join Date: Dec 2001	TTT - anyone?

10th September 2003, 05:31 AM	#10
dih1118 diyAudio Member Join Date: Dec 2001	3 way is what I want do, and is the design I'm interested in. Is their an easier and better way - probably. But I want to do a 3 way enclosure. Could you point me to a website that will help determine the proper order and cutoff frequency for the crossover?