I ended up fitting a copper unit and soldered legs and drilled, from memory this was 4-5X less thermal rise per W dissipated, but was time consuming to make accurately. I have an early Coris LPS that keeps the fan on when in use, when I leave playing a film and test the centre of the heat sink, it never gets over 40 degrees, always 30 something
Interesting cheap upgrade for multi region https://www.rattlebyte.com/Shop.php?lang=en&action=show_impressum
Hi Coris,
I'm interested in the LPS power supply mod for my UB9000 (240v ac here), it does intrigue me on how it improves digital performance (being a coder myself, I dont understand how it would), I totally understand it would certainly improve analogue signals (I used to modify all sorts of analogue signal, both video and audio with great success, but never seemed to help with digital in what I was doing).
Anyway I'm under moderation so cant message you, I'm interested in getting the max out of the HDMI outputs into my receiver, perhaps sending you the main board for modifying the SMPS sections on that to improve the HDMI picture/sound as you have stated.
Thanks,
Ryan
I'm interested in the LPS power supply mod for my UB9000 (240v ac here), it does intrigue me on how it improves digital performance (being a coder myself, I dont understand how it would), I totally understand it would certainly improve analogue signals (I used to modify all sorts of analogue signal, both video and audio with great success, but never seemed to help with digital in what I was doing).
Anyway I'm under moderation so cant message you, I'm interested in getting the max out of the HDMI outputs into my receiver, perhaps sending you the main board for modifying the SMPS sections on that to improve the HDMI picture/sound as you have stated.
Thanks,
Ryan
Don't forget digital is all analogue voltages attempting to be square waves and the noise on a power supply can alter / corrupt these 'square' pulses. Once the data has left the disc and it streams the 'box' is now open. That's my understanding of the reality to digital when you play a disc or stream it's no longer 0,1 it's just trying to be along with timing that it is endeavouring to replicate using the clock and buffers etc
Hi Ryan,
Firstly, you get a PM concerning your interest. I hope you can read it...
About what it intrigue you, I think IWC Doppel have explained somehow in a very simple manner what about the impact of an LPS over the digital signals and processing.
All active components in a such digital (or analogue) system are powered in one or another way. The power supply it get into all the components of a system (processors, more or less complex signal amplifiers, oscillators, etc). In everything actually! Any noise component of an power supply it get into those components together with the main DC power lines. Therefore the noise level generated by an power supply is crucial for the whole rest of the system, and it have more or less impact over device functionality. Such noises it disturbs/affects in a more or less degree the digital processing as well, even thought a digital system is designed to be quite immune to noises. High frequencies in wide spectrum it definitely affect a digital system and the processing in it. There are mechanisms or precautions are taken by the designers to avoid such negative impact of noises induced by a power supply. The protection mechanisms are both realised in software as in hardware fields. In hardware are placed a lot of filtering cells. The software running such digital system is full of software filters and correction routines, to ensure the integrity of the data and the right digital processing. The problem with these software filters is, it use a quite a lot of the processing power of the system. When the filtering and corrections are not very necessary, because the data and the signals include less noises, or perturbations, then the processing it become more fluent, and the most of the processing power become more efficient and it focus more on the processing of the useful signals. We should also take into account the big amount of noises generated by the digital system processing itself (as a switching mode based system). Whole this matter and the noise limiting impact is very complex, but in the end, the result is a decent quality output signal (digital or analogue), which it meet the requirements for a consumer market device. The advertising and the "reviews" it make the rest, so that the average end consumer is enough happy with the quality one get from a manufacturer or a producer of one or another electronic device out there.
A switching mode power supply is by its basic functional principle a very noisy component/device by itself. This is because an electronic switching circuit is used to produce the desired DC lines. A kind of an electric pump... Such switching mechanism is very energetic efficient, it not produce big amount of heat, and the in fact circuit is have a very little footprint. The negative aspect of an SMPS is it always use power to function, even if its output DC lines are not used. An SMPS it stop function only when the power cord is disconnected from outlet. Another bid problem of an SMPS is the generation of a quite high level of large spectre high frequencies, trough its DC outputs, as in the close environment. I have experienced that low quality SMPS it can induce high level noises even into the whole local domestic electrical network. Even thought exceptional measures are taken in designing phase of an SMPS, for filtering the noises, the clean DC lines are not possible to be obtained from a such PSU. The more or less level of noises it is distributed into the whole powered digital/analogue system.
An linear power supply it function in a very different way (no any switching it occur in a such device), and therefore the DC outputs are much more cleaner than the ones of an SMPS. An LPS is a passive device, which it not use power at all if the DC outputs are not in use.
The negative sides: an LPS is more expensive, quite big as dimensions (mainly because its transformer), it produce a quite much heat, and therefore is much less energy effective than an SMPS. Well, we use the LPS for its major advantage: extremely low level noise on outputs, and we ignore the negative sides of it... The main goal is to reduce the noise level induced by the power supply into the whole system. And all this it works quite well also.
An LPS it reduce drastically the noise level, but it not eliminate it completely, because a digital processing is very noisy in itself. An SMPS it add its own HF large spectre noise (what it rest after filtering) to the one generated by the digital processing, and the result is a not good approach at all... However, it is quite obvious that an LPS approach is not that easy to be implemented for a large production of one or another consumer products. It increase a lot the production costs, as the end price of the product, and it not meet the requirements for energy efficiency, for the mass produced goods, present in the todays laws. Correcting this SMPS issue for a reduced number of the devices, for the most exigent of the consumers, it is very possible and it is done also currently by the few specialised individuals/companies.
The lowering in overall noise level by using an LPS instead of an SMPS is well obvious (a fact) on the device output signal, for both analogue or digital interfaces.
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I've been blessed with zero issues with my Pioneer LX500 since buying it new six years ago. Way better sound from its AKM DAC than my Oppo 95's ESS DAC, plus fully functional zoom control. A horrible shame when Pioneer sold its Elite A/V products line to Onkyo, whose managerial blunders led to their acquistion by Voxx. Soon afterwards the Elite BD player line was abandoned. Of course, that ended production of critical replacement parts. LX500/800 owners threads report that many authorized service centers have no stock of even used optical assys, disc drives, et al. Dread the day when my player will become a doorstop.
