Devialet Chat

Hey guys,

I’m a long time listener, first time caller

So firstly I should say thanks for all the help people here have given indirectly in the past. I’m now hoping to get some help with a specific issue of mine.

I’ve been running a D250 with Townshend Isolda cables to Raidho C1.2 speakers - I’ve been LOVING this setup.

About six months ago, I upgraded from the Raidho C1.1s to C1.2s, primarily because I’d damaged one of the cones (probably) from being over-driven. The upgrade was great - predominantly more texture to the bass.

About 3 months ago, I managed to blow the tweeter. Now I never go above ‘0’ on the Dev, I have -3db of headroom in Roon. I clearly have past form for damaging my raidho’s, but it was a surprise. Certain high frequencies disappeared causing images to shift to one side. The lost frequencies would flicker in and out intermittently. The regularity at which they were missing increased until it stopped returning.

Long story short, Raidho fixed the tweeter and replaced the crossover. Benno of GamuT fame emailed me himself and they went above and beyond. Speakers fixed. Happy again.

Now fast forward a few weeks, and the tweeter has gone again! In the same way! Again, not going loud enough to cause clipping/distortion. I find it hard to believe a single Dav could blow the tweeter.

Raidho assured me the tweeter and crossover were replaced, so my only other conclusion is it must be something further up the chain causing this.

So finally to my question... do you think a single Dev could do this? Or the speaker cable? Could the new internal wiring on the Raidho be exciting a certain frequency? Could an issue with the D250 be causing this?

I’m stumped. Still awaiting a response from Raidho, so thought I’d ask here for your thoughts.

Martyn


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I have C-1.1s and I had a D200, and with a few quieter recordings found I had to up the volume beyond 0 (I recall +6 once) just to get a "normal" volume. "Normal" volume for me is probably quiet by most peoples standards. Now I haven't blown the tweeters (as far as I can tell!). Of course you have a fair bit more power from the 250.

(17-Mar-2019, 22:03)Rufus McDufus Wrote: [ -> ]I have C-1.1s and I had a D200, and with a few quieter recordings found I had to up the volume beyond 0 (I recall +6 once) just to get a "normal" volume. "Normal" volume for me is probably quiet by most peoples standards. Now I haven't blown the tweeters (as far as I can tell!). Of course you have a fair bit more power from the 250.

Cheers for the reply. I don’t think I ever get it to really loud levels. And there’s the same single tweeter on the largest of the Raidho speakers being driven by multitudes of more power than my d250, so it feels like it must be something else causing the issue rather than volume alone!


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It is a different tweeter on the 1.2s isn't it (?) so could be something with the newer tweeter?
Do you use SAM? I'm not sure if there is a profile for the 1.2. Using the 1.1 profile would not be a good thing. I never much cared for SAM with the 1.1s anyway.

(17-Mar-2019, 22:29)Rufus McDufus Wrote: [ -> ]It is a different tweeter on the 1.2s isn't it (?) so could be something with the newer tweeter?
Do you use SAM? I'm not sure if there is a profile for the 1.2. Using the 1.1 profile would not be a good thing. I never much cared for SAM with the 1.1s anyway.

Hm so I believe the only changes are the airflow system (to replicate that of the d 1.1) and improved rubber surround of the ceramic drivers to increase dynamics. The tweeter is the same from what I understand.

I use SAM set to zero. The Raidho engineers said the frequencies that SAM operates in will mean it’s fine to use the 1.1 profile on 1.2 speakers. I don’t believe SAM effects anything in the tweeter frequencies, though happy to be told otherwise.


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I had similar issues with my devialet 800 driving magico. With SAM turned on, it will sometimes stop or go out of phase. After ongoing investigation with devialet ( had some good responses from their team) it turns out that the cause was the impedance dip of the magico ( it can go down to effectively 0.5 ohm) which causes the devialet to stop or pause signal temporarily to prevent speaker damage. I solved the problem by adding a pair of super tweeter. This essentially changed the loading profile of the speaker and everything is fine now. You can see if it is the same cause for the raidho.

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Hi thanks for sharing. It couldn’t have come at a better time, as Devialet just came back saying there was nothing wrong with the amp which has left me completely stumped. I’ll raise this with them and see what they say.

I don’t know when you last spoke with Devialet, but the difference in service between now and about 3 years ago... nobody seems to understand what I’m asking these days. It’s so frustrating.

I’ll also ask Raidho what they see.

Also - are you suggesting that if you turned SAM off, this would stop the issue with your Magicos?




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Yes. If I turn off Sam, the problem doesn't appear. The problem is more prominent if the volume is fairly high. (Volume -15db onwards)

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(26-Apr-2019, 07:36)martynbaker1 Wrote: [ -> ]nobody seems to understand what I’m asking these days. It’s so frustrating.

I have a hunch that Devialet support is not within Devialet any more. It has become 'modern' to hire services like this from external providers. That is why they do not understand...

(26-Apr-2019, 07:36)martynbaker1 Wrote: [ -> ]Hi thanks for sharing. It couldn’t have come at a better time, as Devialet just came back saying there was nothing wrong with the amp which has left me completely stumped. I’ll raise this with them and see what they say.

I don’t know when you last spoke with Devialet, but the difference in service between now and about 3 years ago... nobody seems to understand what I’m asking these days. It’s so frustrating.

I’ll also ask Raidho what they see.

Also - are you suggesting that if you turned SAM off, this would stop the issue with your Magicos?




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Yes. I have no issue with SAM off. I got a feeling it could be SAM trying to prevent sudden surge of current due to dip of impedance for protection. It is more prominent on loud volume (vol -15dB or louder)

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