Reengineer What I Already Have?

Jack Tupp · 2nd August 2010, 11:34 PM

I have a set of BIC America DV62si speakers. Walmart type speakers that are about 110/pr. They obviously don't send shivers down your back with their sound but the tweeter is atrocious.

I am wondering if re-engineering the crossover might make it work better. The crossover looks like they cut more than few corners.

I don't know exactly what the drivers are. I think this is the tweeter:

Vifa D19TD-05 3/4" Poly Dome Tweeter | Parts-Express.com

I have no idea about the woofer. It's OD is 6.5" and it looks to be a poly cone. Maybe some one recognizes it.

Pictures:
imgur: The Simple Image Sharer

prickears · 3rd August 2010, 01:43 AM

G'day Jack,

That woofer looks similar to Jaycar units sold downunder, but i'm not sure who actually breeds them, (HiVi?).

How far do want to go with this re-engineering exactly?

Mick.

planet10 · 3rd August 2010, 01:45 AM

SEAS also made/makes a version of the tweeter. Used in PSBs, Missions and a range of other boxes.

Can uou post pics of XO?

The back of the woofer cutout needs champhering and the box could use some bracing.

dave

Jack Tupp · 3rd August 2010, 01:48 AM

I'd be willing to completely rebuild the crossover with good parts and even replace the tweeter if necessary.

Hi dave...theres 7 pictures on the link to the pictures.

infinia · 3rd August 2010, 01:57 AM

Quote:

Originally Posted by prickears

How far do want to go with this re-engineering exactly?

Yup the $10K Q , ... it is what it is.

Or how much money and time do you want to invest this project vs how much satifaction you will get in return.
This stuff is a real time and money sink, but fun!

planet10 · 3rd August 2010, 02:08 AM

Quote:

Originally Posted by Jack Tupp

Hi dave...theres 7 pictures on the link to the pictures.

I can only see 5.

dave

Jack Tupp · 3rd August 2010, 02:13 AM

I don't think any work on the boxes is in order as they are covered with vinyl.

I know there was a guy, Ed Frias, who did crossover mods on these for like 20 bucks. I contacted him a couple years ago to no avail.

The bottom end isn't a problem at all. The highs suck donkey balls.

Modifying the crossover. Rebuilding the crossover. Replacing the tweeter with something not expensive and rebuilding the crossover. I'm open to all that.

If you need info let me know what. If you need more pictures than the 7 I already posted above let me know.

I have no sound measurement equipment but a little electronics knowledge. Soldering components is no problem whatsoever.

Jack Tupp · 3rd August 2010, 02:17 AM

Is this good enough?

imgur: The Simple Image Sharer

prickears · 3rd August 2010, 02:28 AM

Quote:

Originally Posted by planet10

The back of the woofer cutout needs champhering and the box could use some bracing.

dave

These can be done simply with no ill effect on the vinyl covering, but a positive effect on sound quality.

Can you show how these xo components are wired?

Mick.

Jack Tupp · 03:16 AM

Crossover pics.

http://imgur.com/sS9by&XcY8T&n7Al4&1...yC&fNKDk&KTZqB

Looks like a 3.3 uF EL
275 uF film cap
.5 mH inductor and another inductor with no marking whatsoever. I dont have a DCR meter.

I measured the resistor without pulling a leg up and get about 2 ohms.

The wiring on the bottom is woofer -pos-neg tweeter pos-neg.

2nd August 2010, 11:34 PM	#1
Jack Tupp diyAudio Member Join Date: Jul 2009	Reengineer What I Already Have? I have a set of BIC America DV62si speakers. Walmart type speakers that are about 110/pr. They obviously don't send shivers down your back with their sound but the tweeter is atrocious. I am wondering if re-engineering the crossover might make it work better. The crossover looks like they cut more than few corners. I don't know exactly what the drivers are. I think this is the tweeter: Vifa D19TD-05 3/4" Poly Dome Tweeter \| Parts-Express.com I have no idea about the woofer. It's OD is 6.5" and it looks to be a poly cone. Maybe some one recognizes it. Pictures: imgur: The Simple Image Sharer

3rd August 2010, 01:43 AM	#2
prickears diyAudio Member Join Date: Jun 2009 Location: Hamilton, victoria	G'day Jack, That woofer looks similar to Jaycar units sold downunder, but i'm not sure who actually breeds them, (HiVi?). How far do want to go with this re-engineering exactly? Mick. __________________ Making stuff 'idiot proof', Just breeds more effective idiots.

3rd August 2010, 01:45 AM	#3
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	SEAS also made/makes a version of the tweeter. Used in PSBs, Missions and a range of other boxes. Can uou post pics of XO? The back of the woofer cutout needs champhering and the box could use some bracing. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

3rd August 2010, 03:04 AM	#10
Jack Tupp diyAudio Member Join Date: Jul 2009	Crossover pics. http://imgur.com/sS9by&XcY8T&n7Al4&1...yC&fNKDk&KTZqB Looks like a 3.3 uF EL 275 uF film cap .5 mH inductor and another inductor with no marking whatsoever. I dont have a DCR meter. I measured the resistor without pulling a leg up and get about 2 ohms. The wiring on the bottom is woofer -pos-neg tweeter pos-neg. Last edited by Jack Tupp; 3rd August 2010 at 03:16 AM.

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3rd August 2010, 01:48 AM	#4
Jack Tupp diyAudio Member Join Date: Jul 2009	I'd be willing to completely rebuild the crossover with good parts and even replace the tweeter if necessary. Hi dave...theres 7 pictures on the link to the pictures.

3rd August 2010, 02:13 AM	#7
Jack Tupp diyAudio Member Join Date: Jul 2009	I don't think any work on the boxes is in order as they are covered with vinyl. I know there was a guy, Ed Frias, who did crossover mods on these for like 20 bucks. I contacted him a couple years ago to no avail. The bottom end isn't a problem at all. The highs suck donkey balls. Modifying the crossover. Rebuilding the crossover. Replacing the tweeter with something not expensive and rebuilding the crossover. I'm open to all that. If you need info let me know what. If you need more pictures than the 7 I already posted above let me know. I have no sound measurement equipment but a little electronics knowledge. Soldering components is no problem whatsoever.

3rd August 2010, 02:17 AM	#8
Jack Tupp diyAudio Member Join Date: Jul 2009	Is this good enough? imgur: The Simple Image Sharer

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