Sony speaker upgrade question. - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

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
Reply
 
Thread Tools Search this Thread
Old 27th February 2006, 04:04 PM   #1
type is offline type  United States
diyAudio Member
 
Join Date: Jul 2004
Location: Brooklyn, NY
Default Sony speaker upgrade question.

I need a pair of small bookshelf speakers that are either sealed or front ported. I was thinking of upgrading a pair of inexpensive Sony SS-mb150h bookshelf speakers. Here's a link to this speaker:
http://www.amazon.com/gp/product/B00...Fencoding=UTF8
The Sony's are the perfect size for my space, they have what looks and feels like a good cabinet that is front ported and has a 5.25" woofer. I was wondering if you think that there would be a nice improvement to this speaker if the existing woofers were replaced with these Daytons:

http://www.partsexpress.com/pe/showd...number=295-301

Thanks.
  Reply With Quote
Old 27th February 2006, 04:53 PM   #2
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

I suspect the Sony's will have a very simple capacitor crossover,
consequently the dayton driver is not likely to work well.

In most cases fitting a different driver does not work well,
at least can't be guaranteed to work well.

http://www.zaphaudio.com/audio-speaker13.html

The inverted version might work well if you seal the port,
the depth of the cabinets doesn't look that deep.

Alternatively consider the Dayton BR-1 drivers and c/o.

/sreten.
  Reply With Quote
Old 27th February 2006, 05:47 PM   #3
diyAudio Member
 
acoustixman's Avatar
 
Join Date: Feb 2006
Location: Boulder City, Nevada
If the OEM woofers have reasonable force factor (BxL) and low Qts, then the biggest improvement you can do (IMO) for the money is to keep them and improve the x-over (Zobel net on woofer + 12-dB Linkwitz-Riley 2-way at 3-4 kHz is good approach, but there are many valid opinions here).

I apologize for getting long-winded here:

I agree that it is likely that the existing "x-over" is probably in the form of the woofer being raw-connected to the input leads, in parallel with a tweeter-capacitor series connection. This common OEM approach is marginal at best, and the essence is that the tweeter is offered some protection against bass by the capacitor. This is not really a x-over, just a bit of protection. It's the cheapest way the mfr can throw it together without frequent complaints of toasted tweeters. The tweeter's resonance probably crops up around 1-2 kHz with a nasty peak right in the vocal range. A 6-dB cap can't really get around this, unless it's so small that the woofer is dominant up to 6-8 kHz. The woofer will indeed make some noise up there anyway [if it has no filter], and you'll have very cruddy off-axis response (woofer cone breaks up and goes out of phase with the tweeter) without a real x-over of some sort.

The woofer-box alignment is probably peaky at 100Hz (sound like a box or large cup) and the only genuine improvement if so is plugging the port for some transient response recovery. It seems possible enough that an OEM 5-1/4" driver has enough magnet to be decent. Usually larger OEM woofers suck in this department. I wouldn't bother with a woofer since it will probably be better than he cabinet itself (probably stapled/glued 3/8" particleboard). I guess I'm saying that if you want a new woofer, you should just build new cabinets too and skip this purchase.

Happy tweaking and listening!
  Reply With Quote
Old 27th February 2006, 05:55 PM   #4
diyAudio Member
 
acoustixman's Avatar
 
Join Date: Feb 2006
Location: Boulder City, Nevada
If you do get a x-over (such as some recent offerings by Dayton, L-R 12-dB good out-of-box from Parts Express, look for the blue circuit boards, such as PE #260-144), you may need to apply attenuation to the tweeter too, since all of a sudden the woofer won't be trampling all over it with ripply cone out-of-phase crud.

Enjoy...
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Schematics SONY CDP-791 for upgrade CJAVIER Digital Source 5 22nd January 2014 04:58 PM
Sony SCD-1 Firmware Upgrade Chip Version 2.53 Zero Cool Swap Meet 36 25th September 2012 12:40 PM
Question about SONY CDP-470 CD player upgrade bezobraznia Digital Source 12 7th July 2009 12:31 AM
Sony CDP XA 50 ES upgrade ability.... noogie Digital Source 44 28th June 2009 12:38 PM
Newbie Question, upgrade PC speaker's amp. Mikka Solid State 1 4th January 2003 03:23 PM


New To Site? Need Help?

All times are GMT. The time now is 07:51 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2