Sequel no1
Member
Hello my name is Rob, i life in the Netherlands, and i am since 10 years the owner of ML sequel (1) speakers.
After some friends did upgrades their systems, i could not leave behind.
I wanted to upgrade my system with some real good speakers (which together with room accoustic are the weakest link in the audio system).
On the internet i found the ML sequels and could test them on location.
Bam ! Greatest speakers i have ever heard (tested with some good recorded jazz music).
Bought the speakers, and now everyone who listens to them wants to have them.
But, since a while the panels became more quit (bass got to loud), and got worse.
They told me the costs to replace the panels were 1000 Euro (~ 1100 dollar) for each pannel.
The speakers are from 1987 and to spend 2000 euro's for 30 year old speakers (the electronics and the woofer are also that age) is to much for me.
So i did clean the panels (one by one so i could compare the result).
Well, they became much clearer, also in sound
.... Then i found out that the rubber of the woofers were (almost complete) loose from the chassis.
Ok fixed that too.
Then saw some modifications made in the electronic circuit which were certainly not made during assembly.
(ie 10 ohms parallel to the inputs of the woofer).
But most "shocking" was the fact that the highvoltage part of the panel was connected at the fifth stage of the cascade instead of the twelfth (last) stage (i think 500V instead of 1200V could not measure).
And now?
I think i will remove the 10ohms, and test the diodes and capacitors of the cascade (maybe replacing the last stages components) and connect the HV of the panels to the twelfth stage again (ofcourse with high ohm resistors).
Has anybody have an idea why this was done?
After some friends did upgrades their systems, i could not leave behind.
I wanted to upgrade my system with some real good speakers (which together with room accoustic are the weakest link in the audio system).
On the internet i found the ML sequels and could test them on location.
Bam ! Greatest speakers i have ever heard (tested with some good recorded jazz music).
Bought the speakers, and now everyone who listens to them wants to have them.
But, since a while the panels became more quit (bass got to loud), and got worse.
They told me the costs to replace the panels were 1000 Euro (~ 1100 dollar) for each pannel.
The speakers are from 1987 and to spend 2000 euro's for 30 year old speakers (the electronics and the woofer are also that age) is to much for me.
So i did clean the panels (one by one so i could compare the result).
Well, they became much clearer, also in sound
.... Then i found out that the rubber of the woofers were (almost complete) loose from the chassis.
Ok fixed that too.
Then saw some modifications made in the electronic circuit which were certainly not made during assembly.
(ie 10 ohms parallel to the inputs of the woofer).
But most "shocking" was the fact that the highvoltage part of the panel was connected at the fifth stage of the cascade instead of the twelfth (last) stage (i think 500V instead of 1200V could not measure).
And now?
I think i will remove the 10ohms, and test the diodes and capacitors of the cascade (maybe replacing the last stages components) and connect the HV of the panels to the twelfth stage again (ofcourse with high ohm resistors).
Has anybody have an idea why this was done?