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Drive units in Linn Isobarik
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terry
Senior Contributor 200+


Joined: 22 Apr 2003
Posts: 262
Location: UK

PostPosted: Thu May 08, 2003 12:09 am    Post subject: Drive units in Linn Isobarik Reply with quote

The Linn Isobarik had 6 drive units in each speaker including 2 of B139 and 2 of B110. My question is: Were the B139 drive units SP1044 (330mm X 210mm) and were the B110 drive units SP1003 (140mm diameter) or SP1057?

I have being doing a bit of investigation and the official Linn documentation for the Isobarik merely says B139(modified). The B139 SP1044 as far as I know came in two varieties. The B139 SP1044 was quoted as weighing 3.6kg weight; power rating 50 watts; resonant frequency 23Hz; voice coil diameter 50.8mm. The B139B SP1044 was quoted as weighing 3.85kg; power rating 100 watts; resonant frequency 25Hz; voice coil diameter 55mm. I have only listed the specs where differences are quoted.

I suspect that the B139B SP1044 was used in the Isobariks but I don't know with certainty. The B139B might be what Linn calls a 'modified' B139. On the other hand perhaps Linn modified the B139 it in some minor way.

The B139B SP1044 was also used in:
a KEF Horn DIY speaker system along with B110A SP1003 and T27A SP1032.
a KEF Constructor Series Model CS7 along with B110B SP1057 and T33A SP1074

If anyone can post any further information I will be most grateful.

I did try to extract some documentation from Linn about a year ago and I was sent some documentation but it was not detailed with respect to drive units.
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boyzo
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Joined: 10 May 2003
Posts: 44

PostPosted: Sat May 10, 2003 7:22 am    Post subject: LINN isobarik Reply with quote

Sp1044 B139 was used 2 in tandem
Sp1003 B110 mid
ScanSpeak 19mm Soft dome

Passive with optinal Active

In those days LINN had no real skills at crossover design relying on trial and error so the results are somewhat polarizing you love them or hate them.
Sad
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terry
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Joined: 22 Apr 2003
Posts: 262
Location: UK

PostPosted: Tue Jul 01, 2003 1:28 pm    Post subject: Reply with quote

My understanding from a recent post on another Forum is that Falcon Acoustics designed and built the Isobarik crossovers.

I would really like to find out more about the Isobariks but it would appear that there is very little information available. Can anyone offer any links to resources?

Terry
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b139
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Joined: 23 Apr 2003
Posts: 6
Location: UK

PostPosted: Tue Jul 01, 2003 1:36 pm    Post subject: Reply with quote

Here are a couple of links:

Bits'n'pieces of information regarding various Linn product histories


Pink Fish Click left-most ball in second row to navigate to the page.
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proffski
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Joined: 22 Aug 2003
Posts: 1296
Location: Tewkesbury UK

PostPosted: Fri Aug 22, 2003 4:28 pm    Post subject: Re: Drive units in Linn Isobarik Reply with quote

When I last looked, Falcon Acoustics still had some Isobarik Crossovers left for sale, CHEAP!

terry wrote:
The Linn Isobarik had 6 drive units in each speaker including 2 of B139 and 2 of B110. My question is: Were the B139 drive units SP1044 (330mm X 210mm) and were the B110 drive units SP1003 (140mm diameter) or SP1057?

I have being doing a bit of investigation and the official Linn documentation for the Isobarik merely says B139(modified). The B139 SP1044 as far as I know came in two varieties. The B139 SP1044 was quoted as weighing 3.6kg weight; power rating 50 watts; resonant frequency 23Hz; voice coil diameter 50.8mm. The B139B SP1044 was quoted as weighing 3.85kg; power rating 100 watts; resonant frequency 25Hz; voice coil diameter 55mm. I have only listed the specs where differences are quoted.

I suspect that the B139B SP1044 was used in the Isobariks but I don't know with certainty. The B139B might be what Linn calls a 'modified' B139. On the other hand perhaps Linn modified the B139 it in some minor way.

The B139B SP1044 was also used in:
a KEF Horn DIY speaker system along with B110A SP1003 and T27A SP1032.
a KEF Constructor Series Model CS7 along with B110B SP1057 and T33A SP1074

If anyone can post any further information I will be most grateful.

I did try to extract some documentation from Linn about a year ago and I was sent some documentation but it was not detailed with respect to drive units.

_________________
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man standing in a bucket and trying to lift himself up by the handle.
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terry
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Joined: 22 Apr 2003
Posts: 262
Location: UK

PostPosted: Fri Aug 22, 2003 4:33 pm    Post subject: Reply with quote

Thanks - yes I have noted these on Falcon's website.
Terry
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proffski
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Joined: 22 Aug 2003
Posts: 1296
Location: Tewkesbury UK

PostPosted: Wed Jan 04, 2006 2:23 am    Post subject: Reply with quote

A great many years ago a pair of Linn Isobariks were found in the rafters of NAIM Audio in Salisbury.
I was even more broke then, but these were offered to me for £100.
By the time I raised the cash they went for somewhat less to a spotty employed Herbert in the factory. Boy was I upset! Mad

Of what I saw of them, and conversations we had, seems that Linn were quite keen on modifying units in general.

It is a sad loss that so little information escaped forom the Linn factory in the 1st instance! Sad

terry wrote:
Thanks - yes I have noted these on Falcon's website.
Terry
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boyzo
Intermediate Contributor 25+


Joined: 10 May 2003
Posts: 44

PostPosted: Sun Jan 08, 2006 12:00 am    Post subject: Reply with quote

Linn Isobariks is crap

2 drivers = 2x mass 1/2 VAS nothing else

Ivor T = crap

proffski wrote:
A great many years ago a pair of Linn Isobariks were found in the rafters of NAIM Audio in Salisbury.
I was even more broke then, but these were offered to me for £100.
By the time I raised the cash they went for somewhat less to a spotty employed Herbert in the factory. Boy was I upset! Mad

Of what I saw of them, and conversations we had, seems that Linn were quite keen on modifying units in general.

It is a sad loss that so little information escaped forom the Linn factory in the 1st instance! Sad

terry wrote:
Thanks - yes I have noted these on Falcon's website.
Terry
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proffski
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Joined: 22 Aug 2003
Posts: 1296
Location: Tewkesbury UK

PostPosted: Sun Jan 08, 2006 3:06 am    Post subject: Reply with quote

Hmm, bass that went down forever.
The Mid & Top easily sorted to be civilised.
At a mere £100 certainly not worth the Anglo Saxon coment!
This is a Hi-Fi forum.

Still reget the lost purchase...
The Richter SWs plumb the depths even deeper! Much deeper!

Almost there.
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boyzo
Intermediate Contributor 25+


Joined: 10 May 2003
Posts: 44

PostPosted: Mon Jan 09, 2006 7:47 am    Post subject: Reply with quote

Sorry Proff Isobarik = crap
Re Read my post Pal


proffski wrote:
Hmm, bass that went down forever.

Comedian

The Mid & Top easily sorted to be civilised.
At a mere £100 certainly not worth the Anglo Saxon coment!
This is a Hi-Fi forum.

Still reget the lost purchase...
The Richter SWs plumb the depths even deeper! Much deeper!

Almost there.
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boyzo
Intermediate Contributor 25+


Joined: 10 May 2003
Posts: 44

PostPosted: Mon Jan 09, 2006 8:00 am    Post subject: Reply with quote

Reality is the linn Isobarik is a dreadfull speaker Ivor had no idea but then he found Paul Messinger the worst audio Journo and Pal of Naim Julian Vereker the trio the 3 got together and so Linn / Naim was big deal.

Linn = crap Naim = crap



proffski wrote:
Hmm, bass that went down forever.
The Mid & Top easily sorted to be civilised.
At a mere £100 certainly not worth the Anglo Saxon coment!
This is a Hi-Fi forum.

Still reget the lost purchase...
The Richter SWs plumb the depths even deeper! Much deeper!

Almost there.
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terry
Senior Contributor 200+


Joined: 22 Apr 2003
Posts: 262
Location: UK

PostPosted: Mon Jan 09, 2006 11:39 pm    Post subject: Reply with quote

John
You must have had a bad day! Wink
Terry
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boyzo
Intermediate Contributor 25+


Joined: 10 May 2003
Posts: 44

PostPosted: Thu Jan 12, 2006 6:37 am    Post subject: Reply with quote

terry wrote:
John
You must have had a bad day! Wink
Terry


No I simply don't like Linn or Naim products Terry

Wink
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terry
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Joined: 22 Apr 2003
Posts: 262
Location: UK

PostPosted: Thu Jan 12, 2006 2:55 pm    Post subject: Reply with quote

boyzo wrote:
terry wrote:
John
You must have had a bad day! Wink
Terry


No I simply don't like Linn or Naim products Terry

Wink


John You are not permitted to make such statements on this Forum! Wink Wink Wink

Terry is my 'Naim' and Naim is the game! Very Happy Very Happy Very Happy Exclamation
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boyzo
Intermediate Contributor 25+


Joined: 10 May 2003
Posts: 44

PostPosted: Fri Jan 13, 2006 4:44 am    Post subject: Reply with quote

Its your Forum Terry...

I have expressed my views Wink



terry wrote:
boyzo wrote:
terry wrote:
John
You must have had a bad day! Wink
Terry


No I simply don't like Linn or Naim products Terry

Wink


John You are not permitted to make such statements on this Forum! Wink Wink Wink

Terry is my 'Naim' and Naim is the game! Very Happy Very Happy Very Happy Exclamation
Laughing Laughing Laughing Surprised
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