DacXP Signature Problem

regarding Cyrus products and other hifi related threads
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hifinutt
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Re: DacXP Signature Problem

Postby hifinutt » Wed Aug 07, 2019 1:48 pm

Joe wrote:Caps should last at least 15 years.


just had to have a component recapped after 6 years of being on continously [ a psu ] . so i guess in normal usage they might last 15 years
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Re: DacXP Signature Problem

Postby Joe » Wed Aug 07, 2019 4:51 pm

It will depend on the quality of components and the product design of course.

I won't pretend to be an expert but the DAC-XP Sig gets awfully warm for a DAC-Pre. There's a lot packed in that shoebox and heatsinks can only do so much.

Sounds nice though :)
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Re: DacXP Signature Problem

Postby mickbald » Wed Aug 07, 2019 8:21 pm

It's been many years since I've been involved in the design / repair of hi-fi kit so bear with me.

Any piece of circuitry can only manage the incoming voltage / current / power it draws to maximise what it is trying to deliver. Nothing in the internal chip or transistor design can improve the quality of its power supply, it has all sorts of clever bits in the electronics but they all rely of a clean and stable voltage otherwise noise, levels of resonance and harmonics will be introduced.

Capacitors are one of the main components that contribute to a smooth supply to sensitive components throughout the electronic circuit. The quality of capacitors, particularly electrolytic capacitors, varies and the cost does too - upwards. Good ones perform better and don't dry out as quickly.

You will usually see a small electrolytic capacitor siting on the power supply rail just as it connects into the specialist chip, ensuring noise picked up on transit is filtered out. Attention to detail in the design process.

So yes I can see a capacitor upgrade having a massive positive effect on the sound quality and fixing many intermittent faults.

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Re: DacXP Signature Problem

Postby Lancashirelad » Thu Aug 08, 2019 7:28 am

An electronics designer & engineer told me that the Cyrus half-size box does impose compromises on the choice of components which can be physically accommodated in the case. It follows that quality/performance/longevity must also be compromised. Not necessarily a criticism as all manufacturers will have to make similar compromises when designing & bulding devices to suit varying price brackets. But the Cyrus case must impose additional restrictions.
The DacXP Sig does run surprisingly hot which I presume affects longevity & suggests that it might be better to switch to standby when not in use rather than being permanently "on". Earlier posts on life-expectancy of caps would seem to confirm this view.

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Re: DacXP Signature Problem

Postby zippy » Thu Aug 08, 2019 9:06 am

I'm really surprised that some of the above have said that their DACXP/Sig runs hot.
Mine has never got any more than mildly warm whatever I do.

Maybe that's because the PSXR takes a lot of the strain ? In that case the PSXR not only enhances the sound, but probably the longevity too?
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Re: DacXP Signature Problem

Postby Lancashirelad » Thu Aug 08, 2019 9:27 am

I use a PSXR2 & the Sig does get v hot.

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Re: DacXP Signature Problem

Postby MadMax » Thu Aug 08, 2019 9:43 am

Following this thread with interest, as I have a DACXP+ (not sig), which gave me trouble a few years back. Was repaired at Cyrus and has been fine since.

groover- I presume yours was repaired & upgraded at an independent repair shop? At that price I'm wondering if it would be worth shipping a unit down under if the time came for a repair!

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Re: DacXP Signature Problem

Postby Lancashirelad » Thu Aug 08, 2019 12:26 pm

There must be independents in the UK willing & able to service & repair Cyrus products. Perhaps forum users could compile a list including details of work undertaken.

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Re: DacXP Signature Problem

Postby angelface » Thu Aug 08, 2019 2:23 pm

Lancashirelad wrote:An electronics designer & engineer told me that the Cyrus half-size box does impose compromises on the choice of components which can be physically accommodated in the case.


This probably explains why Naim recommends changing the caps every ten years even if Naim rarely uses half-size boxes.
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Re: DacXP Signature Problem

Postby mickbald » Thu Aug 08, 2019 9:33 pm

angelface wrote:
Lancashirelad wrote:An electronics designer & engineer told me that the Cyrus half-size box does impose compromises on the choice of components which can be physically accommodated in the case.


This probably explains why Naim recommends changing the caps every ten years even if Naim rarely uses half-size boxes.


It does make you wonder doesn't it?

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Re: DacXP Signature Problem

Postby groover » Mon Aug 12, 2019 3:08 am

MadMax wrote:Following this thread with interest, as I have a DACXP+ (not sig), which gave me trouble a few years back. Was repaired at Cyrus and has been fine since.

groover- I presume yours was repaired & upgraded at an independent repair shop? At that price I'm wondering if it would be worth shipping a unit down under if the time came for a repair!


Yes, repaired by our Cyrus guru here in Oz, many years of Cyrus experience, not through the official Cyrus distributor channel.

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Re: DacXP Signature Problem

Postby Lancashirelad » Mon Aug 12, 2019 9:25 am

I'm sure there must be a Cyrus guru here in the uk but nobody has responded to my suggestion of creating a list of independent repairers willing & able to service/repair Cyrus gear.
Suggests people normally use Cyrus for repairs, or not many CUers now have Cyrus devices, or nobody has found an independent that they are willing to recommend, or... Maybe Cyrus products are more reliable than posts on CU might suggest. A dealer recently told me to be wary of forums because they inevitably hear from people with issues with products but tend not to hear from people whose purchases are fault free. A bit of a conundrum.

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Re: DacXP Signature Problem

Postby pmc7009 » Mon Aug 12, 2019 2:27 pm

Lancashirelad; I've had Cyrus gear since the 'Mission Cyrus Two' days and have yet to encounter a problem. My DACXP Sig and Mono X amps are used day in day out with no fuss whatsoever. Am I one of the lucky ones? I don't know! What I do know is that I've had many problems with other electrical gear such as Samsung Tv's, Roberts Radios, iPhones etc. I take my hat off to Cyrus!

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Re: DacXP Signature Problem

Postby Lancashirelad » Mon Aug 12, 2019 3:02 pm

That is very good to hear. My CD8SE2 was a nightmare, my CDXTSIG needed a new mech under warranty & my MonoX300Sigs bought new in June this year have been back at Cyrus for over 4 weeks & I'm still awaiting diagnosis of the fault.
Unlucky or what?

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Re: DacXP Signature Problem

Postby mojo » Mon Aug 12, 2019 5:19 pm

I've also owned lots of Cyrus gear over many years (currently I have 21 Cyrus boxes) and I think I've only had one device (an MR3) fail while in my ownership!

Having said that, I've also bought quite a few broken Cyrus units - either to repair them myself or to have them repaired by Cyrus - so I've also been lucky too, and the previous owner has been unlucky. But I think there is some truth to the dealer's view that forums can give quite a distorted negative view.

It may help to be mainly a secondhand buyer, because failures within the first few hours of use can be quite common. The first Cyrus CD player I ever bought - a dAD3Q - was a couple of years old and needed a replacement transport when I bought it. I've now had it for at least 15 years and it's still working perfectly!