My new compact speakers - The Verios

Eric Y · 27th April 2007, 08:11 PM

For a while I've been working on my first design from scratch. It uses the Dayton Neo 3/4" front press fit tweeter with the buyout Hi-Vi A3S-II at parts express in an MTM format. All the details are at my blog ( http://blue-leisure-suit.blogspot.com/ ). I named them the Verios (after the songbird) and am very pleased with the results.
I used 2nd order acoustic slopes and tried to use as few components as possible. I ended up with only 7 per speaker and wht seems to be pretty good performance. The box is just over 2L and tuned to 72Hz. They are only 10"x4-1/4"x6", and I think would work well for an office or bedroom system, with a subwoofer for the lowest octaves.
Comments, and critique would be greatly appreciated.

69stingray · 29th April 2007, 12:42 AM

Nice looking speakers Eric. I haven't reviewed your blog yet, but I am wondering if you crossover includes baffle step correction? If not, do you notice the 6 dB drop off?

omarmipi · 1st May 2007, 02:32 AM

Very nice budget speakers. How much did it end up costing you for 1 speaker?

Eric Y · 1st May 2007, 03:36 PM

I think they ended up being about $30 per speaker for drivers and x-overs.

BUT I would not build this design yet. I'm having a problem with distortion. At low levels they sound very good but as I turn them up they start producing some crazy levels of midrange distortion.
Can Anyone look at my design and get an Idea of what might be going wrong?

I'm using a pretty decent Yamaha receiver.

I'm stereo mode with the speakers high passed at 90Hz (speakers set to small, my only option) with the low frequency sent to my sub.

I'm using homemade toroidal inductors wound from 17 ga magnet wire on a ferrite toroidal core. Do you think there is any chance they could they be saturating?

pjpoes · 1st May 2007, 03:42 PM

what size is the inductor core? Yes it is a possibility, especially if the inductor core is small in size. Generally these aren't the best arrangement unless using very large cores and for larger inductor values. Do you have pictures of the inductors?

sreten · 1st May 2007, 06:05 PM

Hi,

You should not be using toroidal cores (unless you hacksaw an air gap into them).

You will then need a lot more turns but will have much higher saturation current.

/sreten.

edit : apparently there are gapped toroids but there are also
special powdered toroids that effectively distribute the airgap.

why you want to use a core at all I'm not sure :

http://www.partsexpress.com/pe/showd...number=255-220

You need thicker wire on the bass inductor compared to the treble 0.33mH

29th April 2007, 12:42 AM	#2
69stingray diyAudio Member Join Date: Apr 2005 Location: NH	Nice looking speakers Eric. I haven't reviewed your blog yet, but I am wondering if you crossover includes baffle step correction? If not, do you notice the 6 dB drop off? __________________ Audio DIY Page FOLLOWMY529.COM - Subscribe and follow the performance of my daughter's 529 College Saving Account.

1st May 2007, 03:36 PM	#4
Eric Y diyAudio Member Join Date: Mar 2003 Location: Yorba Linda, CA	HELP! I think they ended up being about $30 per speaker for drivers and x-overs. BUT I would not build this design yet. I'm having a problem with distortion. At low levels they sound very good but as I turn them up they start producing some crazy levels of midrange distortion. Can Anyone look at my design and get an Idea of what might be going wrong? I'm using a pretty decent Yamaha receiver. I'm stereo mode with the speakers high passed at 90Hz (speakers set to small, my only option) with the low frequency sent to my sub. I'm using homemade toroidal inductors wound from 17 ga magnet wire on a ferrite toroidal core. Do you think there is any chance they could they be saturating?

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
New Compact TL Project	MJL21193	Multi-Way	80	15th June 2009 11:25 PM
looking for a driver for a compact DJ sub	robotnation	Subwoofers	3	4th October 2008 07:49 AM
need ideas for compact musical speakers	maleemi	Multi-Way	12	1st September 2007 01:10 AM
Speakers From An Old Sony Compact Disc Deck Receiver	borgs	Multi-Way	1	14th November 2006 02:20 AM
Compact sub	DocLorren	Subwoofers	11	8th January 2005 12:34 AM

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

1st May 2007, 02:32 AM	#3
omarmipi diyAudio Member Join Date: Nov 2005	Very nice budget speakers. How much did it end up costing you for 1 speaker?

1st May 2007, 03:42 PM	#5
pjpoes diyAudio Member Join Date: Jan 2005 Location: New York	what size is the inductor core? Yes it is a possibility, especially if the inductor core is small in size. Generally these aren't the best arrangement unless using very large cores and for larger inductor values. Do you have pictures of the inductors?

1st May 2007, 06:05 PM	#6
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Hi, You should not be using toroidal cores (unless you hacksaw an air gap into them). You will then need a lot more turns but will have much higher saturation current. /sreten. edit : apparently there are gapped toroids but there are also special powdered toroids that effectively distribute the airgap. why you want to use a core at all I'm not sure : http://www.partsexpress.com/pe/showd...number=255-220 You need thicker wire on the bass inductor compared to the treble 0.33mH

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)