Sara rebuild idea

[joddle]

I like my Linn Saras but they dont have quite enough oomph for my very large sitting room - already I have had to replace drivers on account of pushing them too much on the cannons on the 1812. My fault but until the moment they died they sounded pretty good. I have now replaced the B200s and all is back to "as was".

I was thinking of getting another (perhaps scrap) pair of Saras - taking out the B200s and replace by Peerless or Monacor 4ohm units (much higher power ratings but very similar characteristics) then putting them in series and finally ditching one of the crossovers from each box so all drive units were using the same crossover but the loads would be 8ohms as in the origionals. Sounds simples - but would it work well?

[bbggg]

No.

[Moondog55]

Powered subs ( 2 or 3 of them ) crossed at 80 Hz, take the cannon shot out of the signal

[Inductor]

Originally Posted by joddle

...I was thinking of getting another (perhaps scrap) pair of Saras - taking out the B200s and replace by Peerless or Monacor 4ohm units (much higher power ratings but very similar characteristics) then putting them in series and finally ditching one of the crossovers from each box so all drive units were using the same crossover but the loads would be 8ohms as in the origionals. Sounds simples - but would it work well?

What???

meaningful improvement over these with new modern speakers is likely to cost in the region of £1700 - £2,000

Sold - Linn Sara 9 Isobarik Loudspeakers (Powered by CubeCart)

[planet10]

Originally Posted by Moondog55

Powered subs ( 2 or 3 of them ) crossed at 80 Hz, take the cannon shot out of the signal

What he said.

dave

[joddle]

Originally Posted by Inductor

What???

OH Hmmm - I will try to explain a little better - The Sara has 2 B200s per box - but also has 2 crossovers built into it. One crossover drives one of the b200s and the tweeter. The other has a dummy load on the tweeter terminals but drives the second B200. This means there is a two crossover load presented to the amplifier and redundancy - not ideal - but a way Linn coped with dealing with a four ohm load (ie two 8 ohm speakers effectively working in parallel) - but as I say not the most elegent approach but and easy solution at the time.

My proposal was to simpilfy the load to the amp by using only one of the crossover units. I also wanted a higher power rating for the bass units and so proposed using 2 modern high quality Peerless drive units (each rated at 75w) but of 4 ohms each but connect them in series so together they would match the single 8 ohhm load to be seen by the crossover unit. The second dummyoaded unit could then be removed as it wodl be totally redundant.

Re a sub - simply no room and WAF to consider (speaker boxes are ugly and so the smaller the better) alas or I would have brought in Tannoys years ago.

[Moondog55]

Oh So the Saras are a 2.5/ I thought they were an Isobaric

[joddle]

Originally Posted by Moondog55

Oh So the Saras are a 2.5/ I thought they were an Isobaric

You are correct - they are isobarik and use the 2 B200s in an isobaric chamber for the bass. It is that part I am thinking of modifying.

[planet10]

They are isobaric, but the XO on the back driver may well have a 0.5 kind of characteristic to minimize the issues with the ripple that starts happening at a half wl of the depth of the isobarik chamber.

dave

[joddle]

Originally Posted by planet10

They are isobaric, but the XO on the back driver may well have a 0.5 kind of characteristic to minimize the issues with the ripple that starts happening at a half wl of the depth of the isobarik chamber.

dave

That's what I thought but in fact both crossovers are identical - apart form the dummy load resistor substituting for the "missing" tweeter