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Multi-Way Conventional loudspeakers with crossovers

LNB Paralabs
LNB Paralabs
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Old 17th April 2013, 12:12 PM   #1
ParalabFan is offline ParalabFan  United Kingdom
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Red face LNB Paralabs

My first posting on this Forum and as you can probably tell I like my Paralabs.
I bought a pair of LNB Paralab 40s a few months ago and have enjoyed them greatly,
They are 3 way speakers with 8" Bass, Celestion HF1300 and Coles 4001. As far as I can tell at the moment the two high frequency units are 15/16 Ohm, and the crossover is fairly basic. I thought thre bass units were KEF but I am thinking they may me Dalesford.
I would love to find more info on these speakers and any mods that people may have carried out.
I have seen many comments on the various LNB speakers and I have a small collection of LNB reviews from a HIFI magazine but nothing, yet for the 40s, can you help?
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Old 17th April 2013, 04:42 PM   #2
ParalabFan is offline ParalabFan  United Kingdom
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Default Photos

Here are some pics showing the fron panel, front and back and the basic crossover. The Caps, all 2 of them, have been replaced.
Attached Images
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File Type: jpg DSC_0021.jpg (108.6 KB, 99 views)
File Type: jpg 2013-04-17 17.11.42.jpg (355.3 KB, 100 views)
File Type: jpg 2013-04-17 17.12.24.jpg (315.3 KB, 93 views)
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Old 17th April 2013, 08:28 PM   #3
Inductor is offline Inductor  Portugal
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Looks good.
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Old 25th May 2013, 11:50 PM   #4
roj48 is offline roj48
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Default Paralab 20s

Hi - I have had a pair of Paralab 20s for some years - they are astonishingly good for fairly small speakers and feature (I think) Kef B200s, T 27s and STC super tweeters. I read somewhere that they were designated as labyrinth cabs mostly to avoid litigation from Arthur Radford and Dr Bailey, but were, in essence T - lines. They seem to absorb endless quantities of power without choking up and have only recently been usurped by my huge Radford Transmission lines - also from the 70s. I haven't seen a pair of 40s before - they look good!
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Old 26th May 2013, 07:27 AM   #5
picowallspeaker is offline picowallspeaker  Italy
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The recessed baffle ( for the cloth cover ) is a little out-of-time , as the angles should be curved . The baffle itself, as I see, it's removable. A good upgrade would be IMO to rebuilt it with thick MDF ( with inside flare for the woofer hole ) or better aluminum or carbon fiber. Just kidding
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Old 26th May 2013, 11:23 PM   #6
ParalabFan is offline ParalabFan  United Kingdom
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Quote:
Originally Posted by roj48 View Post
Hi - I have had a pair of Paralab 20s for some years - they are astonishingly good for fairly small speakers and feature (I think) Kef B200s, T 27s and STC super tweeters. I read somewhere that they were designated as labyrinth cabs mostly to avoid litigation from Arthur Radford and Dr Bailey, but were, in essence T - lines. They seem to absorb endless quantities of power without choking up and have only recently been usurped by my huge Radford Transmission lines - also from the 70s. I haven't seen a pair of 40s before - they look good!
I have read that the difference between a T/L and a Labyrinth is that the Labyrinth has the same crossectional area all the way through and the T/L tapers. The bass unit on the LNBs is not at the start of the labyrinth it appears to be about 25% of the way along,
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Old 26th May 2013, 11:27 PM   #7
ParalabFan is offline ParalabFan  United Kingdom
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Quote:
Originally Posted by picowallspeaker View Post
The recessed baffle ( for the cloth cover ) is a little out-of-time , as the angles should be curved . The baffle itself, as I see, it's removable. A good upgrade would be IMO to rebuilt it with thick MDF ( with inside flare for the woofer hole ) or better aluminum or carbon fiber. Just kidding
You may well be correct about the baffle, as the HF1300 is affected by the edges of the cabinets. Take a look at this: Spendor BC1.

I have two Kef B200 1022s and am going to make 2 more baffles, I also have a pair of Spendor BC1 crossovers so, just for the fun of it, will try those too!
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