Picked up another pair from a deceased friend. I already have a pair.

These are distorting. The bass units appear fine, and I've had the HF
1300s apart to look at the coils - again ok. Any ideas about checking the
STC units? The distortion is most noticeable on some types of speech -
mainly female. If I roll the treble off it all but disappears.

--
*When the going gets tough, the tough take a coffee break *

Dave Plowman London SW
To e-mail, change noise into sound.

On 22/10/2011 18:53, Dave Plowman (News) wrote:
Picked up another pair from a deceased friend. I already have a pair.

These are distorting.

They all do that sir.


--

"sam" wrote in message
o.uk...
On 22/10/2011 18:53, Dave Plowman (News) wrote:
Picked up another pair from a deceased friend. I already have
a pair.

These are distorting.

They all do that sir.


--



What you call the STC unit is actually a Coles 4001. It shouldn't
be too difficult to find an alternative if you can't find
originals. Try www.wilmslow-audio.co.uk


--
Woody

harrogate three at ntlworld dot com

In article , Woody
scribeth thus
"sam" wrote in message
news:8Oudncm0pIdQiT7TnZ2dnUVZ8qqdnZ2d@brightview. co.uk...
On 22/10/2011 18:53, Dave Plowman (News) wrote:
Picked up another pair from a deceased friend. I already have
a pair.

These are distorting.

They all do that sir.


--



What you call the STC unit is actually a Coles 4001. It shouldn't
be too difficult to find an alternative if you can't find
originals. Try www.wilmslow-audio.co.uk



Or give Spendor audio a ring they might be able to help you still Dave..

And if they are in good condition and working within their design limits
... they don't distort!...

--
Tony Sayer

In article ,
tony sayer wrote:
What you call the STC unit is actually a Coles 4001. It shouldn't
be too difficult to find an alternative if you can't find
originals. Try www.wilmslow-audio.co.uk



Or give Spendor audio a ring they might be able to help you still Dave..

I was wondering if there was a test method I didn't know of?

And if they are in good condition and working within their design limits
.. they don't distort!...

Indeed. Extremely low distortion even by the best of today's standards.
Assuming they haven't been thrashed. The BBC knew a thing or two about
speaker design. When the BBC was the BBC, of course.

--
*Can atheists get insurance for acts of God? *

Dave Plowman London SW
To e-mail, change noise into sound.

In article ,
Woody wrote:
"sam" wrote in message
o.uk...
On 22/10/2011 18:53, Dave Plowman (News) wrote:
Picked up another pair from a deceased friend. I already have
a pair.

These are distorting.

They all do that sir.


--



What you call the STC unit is actually a Coles 4001. It shouldn't
be too difficult to find an alternative if you can't find
originals. Try www.wilmslow-audio.co.uk

I could, of course, just swap them from the known good pair. But wondered
if anyone had any bright ideas about testing them?

--
*Do they ever shut up on your planet?

Dave Plowman London SW
To e-mail, change noise into sound.

In article ,
sam wrote:
On 22/10/2011 18:53, Dave Plowman (News) wrote:
Picked up another pair from a deceased friend. I already have a pair.

These are distorting.

They all do that sir.

But not *my* pair. ;-)

--
*There's two theories to arguing with a woman. Neither one works *

Dave Plowman London SW
To e-mail, change noise into sound.

Oh its silly time. Of course rather than gone hard they could be soft and
bottoming. In any case its non linear. I think a lot of drive units with
plastic parts tend to change over time.
Brian

--
Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email:
__________________________________________________ __________________________________________________ __________


"sam" wrote in message
o.uk...
On 22/10/2011 18:53, Dave Plowman (News) wrote:
Picked up another pair from a deceased friend. I already have a pair.

These are distorting.

They all do that sir.


--

In article ,
Brian Gaff wrote:
Oh its silly time. Of course rather than gone hard they could be soft
and bottoming. In any case its non linear. I think a lot of drive units
with plastic parts tend to change over time.

That's common with the bass units - but I'm happy they're ok. The test I
use is to sweep them with an oscillator sine wave at a lowish level.
You'll here them scraping at some frequency. If it's slight,turning the
units upside down often helps.

Tweeters, however, usually have fried coils through overload. The HF 1300
is easy to take apart and physically examine the speech coil - it's
obvious when it's damaged and I have spare coils. The STC or Coles unit
appears to be sealed.

--
*It IS as bad as you think, and they ARE out to get you.

Dave Plowman London SW
To e-mail, change noise into sound.

Suspension gone hard?

Brian

--
Brian Gaff....Note, this account does not accept Bcc: email.
graphics are great, but the blind can't hear them
Email:
__________________________________________________ __________________________________________________ __________


"Dave Plowman (News)" wrote in message
...
Picked up another pair from a deceased friend. I already have a pair.

These are distorting. The bass units appear fine, and I've had the HF
1300s apart to look at the coils - again ok. Any ideas about checking the
STC units? The distortion is most noticeable on some types of speech -
mainly female. If I roll the treble off it all but disappears.

--
*When the going gets tough, the tough take a coffee break *

Dave Plowman London SW
To e-mail, change noise into sound.