I need a little help. Have two pairs of loudspeakers needing drivers.
Wharefedal Denton lls, .3984 ft^3, sealed, 8" driver
xover: tweets: .8mH, 16mfd, 50V
woofer: 2.0 mH, 50mfd, 50V np
and Musical Fidelity MC-2:
no xover info
.68 ft^3, heavily stuffed, 2"X6" port
TDL tweeter and woofer
any ideas?
Wharefedal Denton lls, .3984 ft^3, sealed, 8" driver
xover: tweets: .8mH, 16mfd, 50V
woofer: 2.0 mH, 50mfd, 50V np
and Musical Fidelity MC-2:
no xover info
.68 ft^3, heavily stuffed, 2"X6" port
TDL tweeter and woofer
any ideas?
I have a pair of the rather excellent MC2's.
Have all the drivers gone west ?
TBH trying to reuse crossovers is not the way of
going about it if all the drivers are not working.
The Denton's combination of size and and an 8"
bass driver is going to make life difficult.
If all drivers are gone give up on the crossover.
fit an additional front baffle and build a 6.5"/1"
two way - with offset drivers, suggest using
Dayton drivers - for more info :
http://www.speakerbuilder.net/web_files/Projects/D2/d2main.htm
Any changes because of the Denton cabinets
can be sorted out here.
The MC2's - more details of what doesn't work please.
The tweeter is a TDL / Monitor Audio unit, the bass/mid
unit is an Audax TPX unit, similar to or the same as:
http://www.blackdahlia.com/the_dahlia_speaker_system.htm
Incidently the tweeter was designed to be a drop in
replacement (with minor sensitivity padding) for the
near ubiquitous Audax rectangular dome tweeter.
sreten.
Have all the drivers gone west ?
TBH trying to reuse crossovers is not the way of
going about it if all the drivers are not working.
The Denton's combination of size and and an 8"
bass driver is going to make life difficult.
If all drivers are gone give up on the crossover.
fit an additional front baffle and build a 6.5"/1"
two way - with offset drivers, suggest using
Dayton drivers - for more info :
http://www.speakerbuilder.net/web_files/Projects/D2/d2main.htm
Any changes because of the Denton cabinets
can be sorted out here.
The MC2's - more details of what doesn't work please.
The tweeter is a TDL / Monitor Audio unit, the bass/mid
unit is an Audax TPX unit, similar to or the same as:
http://www.blackdahlia.com/the_dahlia_speaker_system.htm
Incidently the tweeter was designed to be a drop in
replacement (with minor sensitivity padding) for the
near ubiquitous Audax rectangular dome tweeter.
sreten.
retrofits.
The tweetes in the Dentons are paper, I'd like to use domes. I have 2 prs of tweeters kickin around, a pair of rectangular tweeters out of a pair of Missions, and a pair of circular ones. One woofer is smoked. I destroyed it postmortem to have a look. I had thought of just starting fresh with a new xover, and creating a stepped baffle for the front and using a smaller driver.The volume is only .4 ft^3
The MC-2s require 1 woofer. They were given to me sans woofer. The previous owner gave up trying to find a decent replacement. They sure look like TDL drivers (actually I know they are as I had called musical fidelity who verified that they were, but alas provided no further info).
thanx for any and all ideas
The tweetes in the Dentons are paper, I'd like to use domes. I have 2 prs of tweeters kickin around, a pair of rectangular tweeters out of a pair of Missions, and a pair of circular ones. One woofer is smoked. I destroyed it postmortem to have a look. I had thought of just starting fresh with a new xover, and creating a stepped baffle for the front and using a smaller driver.The volume is only .4 ft^3
The MC-2s require 1 woofer. They were given to me sans woofer. The previous owner gave up trying to find a decent replacement. They sure look like TDL drivers (actually I know they are as I had called musical fidelity who verified that they were, but alas provided no further info).
thanx for any and all ideas
Re: retrofits.
paragraph 1 - refer to my reccomendations previously.
paragraph 2 - I know my onions. I own the Loudspeakers.
The reason the MC2 is so heavily damped is the TPX drivers
delivered had different parameters, compared to the original
parameters claimed.
(A phone call, yes well, they are bound to know, not)
from :
http://www.blackdahlia.com/articles/dahlia_debra.htm
Unfortunately it deals with new tweeters not new bass units.
sreten.
Nanook said:
paragraph 1 - refer to my reccomendations previously.
paragraph 2 - I know my onions. I own the Loudspeakers.
The reason the MC2 is so heavily damped is the TPX drivers
delivered had different parameters, compared to the original
parameters claimed.
(A phone call, yes well, they are bound to know, not)
from :
http://www.blackdahlia.com/articles/dahlia_debra.htm
Unfortunately it deals with new tweeters not new bass units.
sreten.
Re: woofer.
I presume you are referring to the Dentons and the tweeters are OK.
My best guess :
http://www.partsexpress.com/pe/pshowdetl.cfm?&DID=7&Partnumber=290-063
sreten.
Nanook said:
I presume you are referring to the Dentons and the tweeters are OK.
My best guess :
http://www.partsexpress.com/pe/pshowdetl.cfm?&DID=7&Partnumber=290-063
sreten.
Hi again,
I've been digging a bit more and the MC2 bass unit is not the
same as the Audax units in the Black Dahlia, though those units
do resemble the clear phase plugged TPX driver used in the MC4's.
I seem to remember at the time that the MC2 was touted as
using a budget version of the MC4's driver and that it used
a TPX cone, its impossible to tell by inspection.
Without ripping all the foam out I remember it being 2nd
order LC for the woofer and RCLC 3rd order with an
attenuating resistor for the tweeter. I seem to remember the
resistor being before the c/o components for the tweeter.
So one possible way forward - remove the woofer components
and the resistor - wire a link across the resistor and inductor
points.
As the speakers are biwirable you can now play with these outside the speaker.
The question is - what pair of bass units to try ?
(0.7 cuft = 18litres)
The P22 here is a possibility :
http://www.apexjr.com/speakerstuff.html
IMO they are worth the saving attempt.
The tweeter is still pretty good and was one
of the earliest to have a damped rear cavity.
The cabinet construction is seriously braced and as
you know stuffed to the gills with high grade foam.
sreten.
I've been digging a bit more and the MC2 bass unit is not the
same as the Audax units in the Black Dahlia, though those units
do resemble the clear phase plugged TPX driver used in the MC4's.
I seem to remember at the time that the MC2 was touted as
using a budget version of the MC4's driver and that it used
a TPX cone, its impossible to tell by inspection.
Without ripping all the foam out I remember it being 2nd
order LC for the woofer and RCLC 3rd order with an
attenuating resistor for the tweeter. I seem to remember the
resistor being before the c/o components for the tweeter.
So one possible way forward - remove the woofer components
and the resistor - wire a link across the resistor and inductor
points.
As the speakers are biwirable you can now play with these outside the speaker.
The question is - what pair of bass units to try ?
(0.7 cuft = 18litres)
The P22 here is a possibility :
http://www.apexjr.com/speakerstuff.html
IMO they are worth the saving attempt.
The tweeter is still pretty good and was one
of the earliest to have a damped rear cavity.
The cabinet construction is seriously braced and as
you know stuffed to the gills with high grade foam.
sreten.Attachments
sreten,
thanx for the help. I was looking at using perhaps the silver flute W20Rc-38-08, B4 vented 18l, 2"diaX4" vent, Fb=53, F3=60
with the 19.24l stock box (measured) Fb=52.6, F3=57.
I will look at the apex jr. (I started doing a search, and this was one of the possibilities). I have found a pair of MC-2's on the net, for something in the order of 170 UK pounds. This would equate to somewhere near Cdn $408 (without including shipping). The Musical Fidelity loudspeakers are very rare over here.
thank you for continuing efforts.
stew
thanx for the help. I was looking at using perhaps the silver flute W20Rc-38-08, B4 vented 18l, 2"diaX4" vent, Fb=53, F3=60
with the 19.24l stock box (measured) Fb=52.6, F3=57.
I will look at the apex jr. (I started doing a search, and this was one of the possibilities). I have found a pair of MC-2's on the net, for something in the order of 170 UK pounds. This would equate to somewhere near Cdn $408 (without including shipping). The Musical Fidelity loudspeakers are very rare over here.
thank you for continuing efforts.
stew
The silver flute and vifa parameters are almost
identical regarding the box size.
The SF's would definetely need some c/o tweaking
and I'd suggest being paper give the speaker a
somewhat different character.
The Vifa is more likely to be closer to the original,
and IMO require less c/o tweaking.
The MC2 was designed with the involvement of
"guru" Martin Colloms now of the mag Stereophile.
It recieved several rave reviews, including an
oustanding write up in HiFi choice, consequently
they are quite collectable and go for good prices
on E-Bay.
They where originally ~ £250 circa 1986, which
was a lot for a vinyl covered louspeaker.
Stupidly they were replaced by a mkII version
with a cheaper Audax metalised soft dome.
THe c/o uses high quality components for the time.
I have tweaked mine by damping the cabinets
with vinyl floor tiles, foam lining the port and
adding a little padding to bring down the tweeter
a touch. I also have some passive very low bass
lift built into my amplifier.
I've been trying to find a cheaper alternative for
the Dentons to the Pioneer, which may be too
sensitive.
But even going down to 6.5" I can't find a good
cheap driver to suit.
Wharfedales generally cheated on impedance
being 6 ohms nominal. So an option is to find
some cheap car 6.5" or 8" drivers.
sreten.
identical regarding the box size.
The SF's would definetely need some c/o tweaking
and I'd suggest being paper give the speaker a
somewhat different character.
The Vifa is more likely to be closer to the original,
and IMO require less c/o tweaking.
The MC2 was designed with the involvement of
"guru" Martin Colloms now of the mag Stereophile.
It recieved several rave reviews, including an
oustanding write up in HiFi choice, consequently
they are quite collectable and go for good prices
on E-Bay.
They where originally ~ £250 circa 1986, which
was a lot for a vinyl covered louspeaker.
Stupidly they were replaced by a mkII version
with a cheaper Audax metalised soft dome.
THe c/o uses high quality components for the time.
I have tweaked mine by damping the cabinets
with vinyl floor tiles, foam lining the port and
adding a little padding to bring down the tweeter
a touch. I also have some passive very low bass
lift built into my amplifier.
I've been trying to find a cheaper alternative for
the Dentons to the Pioneer, which may be too
sensitive.
But even going down to 6.5" I can't find a good
cheap driver to suit.
Wharfedales generally cheated on impedance
being 6 ohms nominal. So an option is to find
some cheap car 6.5" or 8" drivers.
sreten.Hi,
Did you ever find the MC-2 woofer you were looking for? If not would you be interested in selling a tweeter from one?
I have a pair of MC-2's that a friend gave me but with one damaged tweeter, I have tried for a couple of years to find a replacement but with no luck.
At the moment I have shoehorned in a pair of nasty Altai tweeters and the sound is laughable.
Cheers,
Doug
Did you ever find the MC-2 woofer you were looking for? If not would you be interested in selling a tweeter from one?
I have a pair of MC-2's that a friend gave me but with one damaged tweeter, I have tried for a couple of years to find a replacement but with no luck.
At the moment I have shoehorned in a pair of nasty Altai tweeters and the sound is laughable.
Cheers,
Doug
I have wounded MC-2s
I have a pair of MC-2's with a woofer that went dead.
They were being driven pretty hard with the latest disc from Thronley.
I'd appreciate some advice on how to figure out what can be done to fix them but if it's a case of find another woofer...
...maybe I have some MC-2 parts for sale or trade if someone needs them.
I have a pair of MC-2's with a woofer that went dead.
They were being driven pretty hard with the latest disc from Thronley.
I'd appreciate some advice on how to figure out what can be done to fix them but if it's a case of find another woofer...
...maybe I have some MC-2 parts for sale or trade if someone needs them.
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