Building cheap surrounds, what wide-range driver? - Page 2

SteveG · 12th February 2002, 02:05 PM

Oops... forgot the website-
http://www.tb-speaker.com/
click on tweeters and scroll down to full range section. check this out:

St= Z · 12th February 2002, 02:28 PM

Thanks guys this is EXACTLY what I was looking for.

I see you pointed to the W3-319 would this be the model you would recommend? (Looks like any one of them will do).

Being that they are serving as near-field surrounds I'm thinking of running a little pot in-between (to dial down the volume), I know very little about EE, can I just slap a pot in the line of speaker wire? Is there certain specs of the pot I should look for?

And wilst I have your attention, any recommendations on a little sub amp (25-50W) I'm looking at the 25/25 Watt on apexjr.com .

SteveG · 12th February 2002, 04:21 PM

Well, not having heard any of them, I can't really recommend which one is better. The model I posted was the one I was looking into for a budget surround setup. As far as attenuation goes, you need an L-pad in line with the speaker. It's basically a high-powered potentiometer set up to keep the impedance (ohms) seen by the amp at the same level while attenuating the driver. You should be able to find them about anywhere. Don't know about the sub amp. I know that you can get 75 watters for pretty darn cheap these days. Look at www.partsexpress.com
Steve

St= Z · 12th February 2002, 04:51 PM

Okay an L-pad, any idea of what watt I should look for? The surrounds will probably be "doubled up" on the amps taps, so I have the headrest and outside surrounds going (for riends). Do you think a 50W L-pad would be apropriate? Are there special considerations on the "doubling up", I figure it will be negligable.

also any idea why the l'pads have a pair of three leads instead of two? (maybe a ground?)

Thanks again for the advice it is proving most usefull.

SteveG · 12th February 2002, 05:05 PM

check out this link for L-pad wiring:

http://colomar.com/Shavano/lpad.html

St= Z · 12th February 2002, 10:12 PM

you are the man.

hifiZen · 15th February 2002, 07:50 AM

why not use analog attenuation before your power amplifier? I don't know what kind of setup you have, but a stereo pot to attenuate your line level signals is probably a better way to go.

St= Z · 15th February 2002, 03:24 PM

Thanks for the suggestion

The chair is designed to be able to easily integrate into most HT setups, the headrest surrounds are in addition to existing ones so they require their own volume control, not the audiophile option, but I think an L-pad makes the most sense.

Hey SteveG, where are the TB's for $4? Under 3" drivers I see them for $7, I'm assuming that the MCM brand 3" wideranges are just OEM's of TB's right?

SteveG · 15th February 2002, 04:21 PM

Well, I thought that MCM was selling them for that. Maybe they raised the price back up when they realized that they would sell A LOT of them! Yes, the MCM brand are relabled TB's. If you look closely at the picture on their site, you can see the TB label. Sorry to give misinformation on the price! I thought they were down around $4.

St= Z · 15th February 2002, 05:08 PM

Thats pretty much what I figured, still cheap though at $6 quantity.

15th February 2002, 07:50 AM	#17
hifiZen diyAudio Member Join Date: May 2001 Location: Mountain View, CA	why not use analog attenuation before your power amplifier? I don't know what kind of setup you have, but a stereo pot to attenuate your line level signals is probably a better way to go. __________________ - Chad.

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12th February 2002, 02:28 PM	#12
St= Z diyAudio Member Join Date: Feb 2002	Thanks guys this is EXACTLY what I was looking for. I see you pointed to the W3-319 would this be the model you would recommend? (Looks like any one of them will do). Being that they are serving as near-field surrounds I'm thinking of running a little pot in-between (to dial down the volume), I know very little about EE, can I just slap a pot in the line of speaker wire? Is there certain specs of the pot I should look for? And wilst I have your attention, any recommendations on a little sub amp (25-50W) I'm looking at the 25/25 Watt on apexjr.com .

12th February 2002, 04:21 PM	#13
SteveG Account Disabled Join Date: Jan 2002 Location: Newton Falls, Ohio	Well, not having heard any of them, I can't really recommend which one is better. The model I posted was the one I was looking into for a budget surround setup. As far as attenuation goes, you need an L-pad in line with the speaker. It's basically a high-powered potentiometer set up to keep the impedance (ohms) seen by the amp at the same level while attenuating the driver. You should be able to find them about anywhere. Don't know about the sub amp. I know that you can get 75 watters for pretty darn cheap these days. Look at www.partsexpress.com Steve

12th February 2002, 04:51 PM	#14
St= Z diyAudio Member Join Date: Feb 2002	Okay an L-pad, any idea of what watt I should look for? The surrounds will probably be "doubled up" on the amps taps, so I have the headrest and outside surrounds going (for riends). Do you think a 50W L-pad would be apropriate? Are there special considerations on the "doubling up", I figure it will be negligable. also any idea why the l'pads have a pair of three leads instead of two? (maybe a ground?) Thanks again for the advice it is proving most usefull.

12th February 2002, 05:05 PM	#15
SteveG Account Disabled Join Date: Jan 2002 Location: Newton Falls, Ohio	check out this link for L-pad wiring: http://colomar.com/Shavano/lpad.html

12th February 2002, 10:12 PM	#16
St= Z diyAudio Member Join Date: Feb 2002	you are the man.

15th February 2002, 03:24 PM	#18
St= Z diyAudio Member Join Date: Feb 2002	Thanks for the suggestion The chair is designed to be able to easily integrate into most HT setups, the headrest surrounds are in addition to existing ones so they require their own volume control, not the audiophile option, but I think an L-pad makes the most sense. Hey SteveG, where are the TB's for $4? Under 3" drivers I see them for $7, I'm assuming that the MCM brand 3" wideranges are just OEM's of TB's right?

15th February 2002, 04:21 PM	#19
SteveG Account Disabled Join Date: Jan 2002 Location: Newton Falls, Ohio	Well, I thought that MCM was selling them for that. Maybe they raised the price back up when they realized that they would sell A LOT of them! Yes, the MCM brand are relabled TB's. If you look closely at the picture on their site, you can see the TB label. Sorry to give misinformation on the price! I thought they were down around $4.

15th February 2002, 05:08 PM	#20
St= Z diyAudio Member Join Date: Feb 2002	Thats pretty much what I figured, still cheap though at $6 quantity.