I recently came by a pair of Leak 600 Sandwich speakers: Sandwich 12" bass
driver, 3½" paper cone mid and a plastic dome tweeter (I know, most of
the 600s had a Sandwich mid as well, but not this pair).

The mid drivers in both were stone dead (rattle croak fluff) and as result I
need to fit some different mid units. The original mid units had around 16
ohm impedance, I believe, and the new ones 8 ohms; some work is therefore
going to be needed on the crossover points as the current values will be
well off for 8 ohm drivers.

Does anyone out there have any technical information about these speakers:
existing crossover
frequencies, bottom end driver impedance, tweeter impedance, a crossover
schematic would be amazing but, I suspect, unlikely to exist in the wild,
Thielle Small params for the 12" driver would be more amazing still but I
guess even more unlikely.

I am thinking about designing new boxes and dropping the crossover frequency
between bottom and mid a bit as I have to attack the crossovers anyway, so
any info whatsoever would be a big help.

TIA

Paulos

Paulos wrote:

I recently came by a pair of Leak 600 Sandwich speakers: Sandwich 12" bass
driver, 3½" paper cone mid and a plastic dome tweeter (I know, most of
the 600s had a Sandwich mid as well, but not this pair).

The mid drivers in both were stone dead (rattle croak fluff) and as result I
need to fit some different mid units. The original mid units had around 16
ohm impedance, I believe, and the new ones 8 ohms; some work is therefore
going to be needed on the crossover points as the current values will be
well off for 8 ohm drivers.

Does anyone out there have any technical information about these speakers:
existing crossover
frequencies, bottom end driver impedance, tweeter impedance, a crossover
schematic would be amazing but, I suspect, unlikely to exist in the wild,
Thielle Small params for the 12" driver would be more amazing still but I
guess even more unlikely.

I am thinking about designing new boxes and dropping the crossover frequency
between bottom and mid a bit as I have to attack the crossovers anyway, so
any info whatsoever would be a big help.

Have you considered the possibility of repairing the mid drivers ?

Graham

"Paulos"

I recently came by a pair of Leak 600 Sandwich speakers: Sandwich 12" bass
driver, 3½" paper cone mid and a plastic dome tweeter (I know, most of
the 600s had a Sandwich mid as well, but not this pair).

The mid drivers in both were stone dead (rattle croak fluff) and as result
I
need to fit some different mid units. The original mid units had around 16
ohm impedance, I believe, and the new ones 8 ohms; some work is therefore
going to be needed on the crossover points as the current values will be
well off for 8 ohm drivers.

I am thinking about designing new boxes and dropping the crossover
frequency
between bottom and mid a bit as I have to attack the crossovers anyway, so
any info whatsoever would be a big help.



** Know the old story about " My Father's Axe " ??

It was a wonderful axe that lasted him all his life.

He changed the head three times and the handle twice !!



......... Phil

Hmmm...in that case could you suggest a pair of 3 way speakers that sound
really good (with or without a tweak or two) that deliver thunderous bass
and cost around 40 quid a pair (plus an extra tenner in this case for the
replacement mid drivers).

Me...I'm not too bothered how original they are or they stay ; I'm only in
it for the sounds!

Paulos


"Phil Allison" wrote in message
...

"Paulos"

I recently came by a pair of Leak 600 Sandwich speakers: Sandwich 12"
bass
driver, 3½" paper cone mid and a plastic dome tweeter (I know, most of
the 600s had a Sandwich mid as well, but not this pair).

The mid drivers in both were stone dead (rattle croak fluff) and as
result I
need to fit some different mid units. The original mid units had around
16
ohm impedance, I believe, and the new ones 8 ohms; some work is therefore
going to be needed on the crossover points as the current values will be
well off for 8 ohm drivers.

I am thinking about designing new boxes and dropping the crossover
frequency
between bottom and mid a bit as I have to attack the crossovers anyway,
so
any info whatsoever would be a big help.



** Know the old story about " My Father's Axe " ??

It was a wonderful axe that lasted him all his life.

He changed the head three times and the handle twice !!



........ Phil

"Paulos Top Posting Audiophool "


I recently came by a pair of Leak 600 Sandwich speakers: Sandwich 12"
bass
driver, 3½" paper cone mid and a plastic dome tweeter (I know, most of
the 600s had a Sandwich mid as well, but not this pair).

The mid drivers in both were stone dead (rattle croak fluff) and as
result I
need to fit some different mid units. The original mid units had around
16
ohm impedance, I believe, and the new ones 8 ohms; some work is
therefore
going to be needed on the crossover points as the current values will be
well off for 8 ohm drivers.

I am thinking about designing new boxes and dropping the crossover
frequency
between bottom and mid a bit as I have to attack the crossovers anyway,
so
any info whatsoever would be a big help.



** Know the old story about " My Father's Axe " ??

It was a wonderful axe that lasted him all his life.

He changed the head three times and the handle twice !!



Hmmm...in that case could you suggest a pair of 3 way speakers that sound
really good (with or without a tweak or two) that deliver thunderous bass
and cost around 40 quid a pair (plus an extra tenner in this case for the
replacement mid drivers).


** Well - cleary not those Leak 600 piles of ****.

Arguably one of the worst sounding brand name speaker ever sold.


Me...I'm not too bothered how original they are or they stay ; I'm only in
it for the sounds!


** Then you need to spends a few more pounds - Mr Tightarse.




......... Phil

"Phil Allison" wrote in message
...

"Paulos Top Posting Audiophool "


I recently came by a pair of Leak 600 Sandwich speakers:
Sandwich 12"
bass
driver, 3½" paper cone mid and a plastic dome tweeter (I know,
most of
the 600s had a Sandwich mid as well, but not this pair).

The mid drivers in both were stone dead (rattle croak fluff) and
as
result I
need to fit some different mid units. The original mid units had
around
16
ohm impedance, I believe, and the new ones 8 ohms; some work is
therefore
going to be needed on the crossover points as the current values
will be
well off for 8 ohm drivers.

I am thinking about designing new boxes and dropping the
crossover
frequency
between bottom and mid a bit as I have to attack the crossovers
anyway,
so
any info whatsoever would be a big help.



** Know the old story about " My Father's Axe " ??

It was a wonderful axe that lasted him all his life.

He changed the head three times and the handle twice !!



Hmmm...in that case could you suggest a pair of 3 way speakers
that sound
really good (with or without a tweak or two) that deliver
thunderous bass
and cost around 40 quid a pair (plus an extra tenner in this case
for the
replacement mid drivers).


** Well - cleary not those Leak 600 piles of ****.

Arguably one of the worst sounding brand name speaker ever sold.


Me...I'm not too bothered how original they are or they stay ; I'm
only in
it for the sounds!


** Then you need to spends a few more pounds - Mr Tightarse.




........ Phil




Phil, why be so agressive? People have different likes in sound
quality and it is likely that the Sandwich suits the OP's likes. A
friend of mine has a pair (and has had for a couple of decades) and
for the size of his room, the equipment that he uses, and above all
the type of music that he listens to, they suit him perfectly. I have
heard many speakers in my time and I like them.

You would probably disagree with my likes. I had a pair of the big
Transmission Lines designed by Dr Arthur Bailey and published in
Wireless World in 1971 (or was it 1972?) They could push your windows
out with organ pedal notes but were the easiest speakers I've ever
listened to, albeit they had little stereo imaging. I went from them
to a pair of Spendor BC1's that I still have but don't use. They were
superb for detail but very warm sounding and lacking bass detail
compared with their predecessors. I now have KEF Q5's, which although
they are good I wish in some ways I had never bought - and I like KEF.
I have heard many others, by the likes of Mission, Gale, NEAT, AE and
others and most of them I wouldn't give house room - but that is
largely because they don't suit my musical tastes and those are very
broad believe me.

So can we have a little decorum on this group please - as it is most
of the time. If the OP likes them then help him resolve his problem,
don't blast him for being an idiot for buying them in the first place.
By the way, my BC1's were ex-BBC and cost me £80 plus £30 for a pair
of new original grilles - and I won't part with them unless there is
no other option.


--
Woody

harrogate3 at ntlworld dot com

Phil, why be so agressive? People have different likes in sound
quality and it is likely that the Sandwich suits the OP's likes. A
friend of mine has a pair (and has had for a couple of decades) and
for the size of his room, the equipment that he uses, and above all
the type of music that he listens to, they suit him perfectly. I have
heard many speakers in my time and I like them.


Hi

I couldn't agree more with this.

I had tried loads of modern speakers until I came across the Tannoy
Yorks that I owned for some years. They were great and the only reason I
sold them was that we were moving into a small apartment from a huge house.

I then bought a pair of modern speakers but couldn't live with them as
hifi. They are now acting as possibly the most expensive computer
speakers ever!

I have ended up with a pair of Tannoy Lancasters with 12" Monitor Golds
in them as the only way that I can get that Tannoy sound back. They are
not as good as the Yorks however (sob).

Ah well....

It just goes to show that it really is about personal taste in the end.

Regards

David

"harrogate3"


Phil, why be so agressive?


** Why ask loaded questions - **** brain ??





....... Phil