Цитата:Postscript - Optimising the V-LPS at a bargain price

The article above has shown how the addition of the enhanced power supply for the V-LPS takes it to a new and much higher sonic level. Though more expensive than the V-LPS itself, the V-PSU is much more quiet electronically than the standard wall PSU and hugely enhances the music with richer, fuller sound; stronger, tighter base and sweeter, less sibilant treble. So all things considered a bit of a bargain, particularly if you have any of the other Musical Fidelity "V" devices which could share the cost and enjoy their sonic enhancements.

Some of the more technical members of the forum took the DIY route and either made a power supply themselves or managed to source a much cheaper equivalent third party supply from Amazon or Radioshack in the US. Despite looking hard, I could not find the equivalent in the UK so took the proprietary route. As soon as I heard the benefits, any second-thoughts disappeared as I sat back and started listening to the wonderful new sound being produced from my humble setup.

In the meantime someone read my forum post on TheVinylEngine and suggested a third option, that of battery power. Coming from mainland Europe apparently made it a bit of a pain to use even the basic wall PSU so instead of resorting to adapters or the more expensive V-PSU, he decided to just replace the standard wall PSU with a lead acid battery of appropriate specification. For some hardware this is impossible but as the V-LPS takes a direct current feed, such action is much more straight forward assuming you can get all the values matched up.

Now looking at the instruction booklet, the back of the V-LPS and the existing wall PSU itself you can work out the following:

1 - The V-LPS requires a potential difference of 12 volts

2 - A current of 3.2 amps

3 - The specific dimension of male socket

4 - The sockets appropriate polarity

I managed to source the appropriate lead-acid battery from Maplins here in the UK for the princely sum of £26.99 and an equivalent charger that would charge the battery until fully charged then automatically switch to trickle charge (with a nice little flashing red warning LED) for £21.99. So all done for a total of £48.98 delivered (less than half that of the V-PSU). I’m sure that those more electronics savvy than I, with a better ability to shop around can get exactly what they need for less than I did.

So, does it work ......? Giving the battery the night to fully charge I switched off my V-PSU, swapped over the power cables and lowered the tone arm and ..... Hey presto! Great sounding music. In fact, as far as I could tell it was as least as good as the V-PSU for less than half the price. OK so it wouldn’t win any beauty contests, but those smarter than I should be able to hide it out of the way or at least pretty it up!

Many hours of A/B listening tests and I figured that the battery was definitely no worse than the V-PSU. Measuring the noise produced by the battery compared to the V-PSU showed the electronic noise produced by the V-LPS with the battery power was LESS THAN HALF that with the official Musical Fidelity power supply (at certain frequencies). Now we are talking about very small numbers here, so will possibly only be audible at the very quietest of musical passages but never the less ...... Better is better right?

Please note that the chart below is with the volume on my amplifier set to its highest level so will differ from the values found in the graphs above which were set between 33% and 50% (the values from the original power supply would be off the chart, the V-PSU is such an improvement). With either source of power the noise is now very low but IS definitely slightly more audible with the V-PSU.

So in summary, if you don't mind having to recharge your battery after each listening session (I've yet to run the battery out), this is a veritable bargain, making one of HiFi's biggest steals (in my opinion!) even bigger.


The truth is, the V-PSU is already a bargain when comparing its price with the sonic levels it facilitates from the V-LPS. This blog does obviously cannot take any responsibility for anyone who tries this approach and suffers any issues at all. I would recommend consulting an expert and if you remain the least bit nervous, stick with the V-PSU, it is a fabulous unit and you will not be sorry you made the purchase.

(18-11-2013 16:28)pumuru писал(а):  Может 10 пальчиковых аккумуляторов на 1.2 В набрать в бокс? Заряжать и контролировать будет попроще.

(18-11-2013 16:33)FreezNight писал(а):  

(18-11-2013 16:28)pumuru писал(а):  Может 10 пальчиковых аккумуляторов на 1.2 В набрать в бокс? Заряжать и контролировать будет попроще.

Да думал об этом... но емкость пальчиковых аккумуляторов маловата... пластинки слушаю и оцифровываю часто, поэтому сядут они быстро...придется чаще заряжать. Хотя энергопотребление самого корректора не выше 600мА.... можно будет и попробовать, но хотелось бы с батареей от ИБП емкость у нее все-таки по более....

Цитата:Если действительно такое потребление, что, по-моему, слишком много для корректора — 600 мА — тогда лучше уже ставить автомобильный аккумулятор сразу. Его хоть на несколько суток хватит, меньше хлопотать заряжать. Да и автомобильную зарядку найти проще где угодно, и качество этих аккумуляторов будет наверное получше, чем можно сходу достать 12В 7А•ч обычно в магазине... А если будет и терять емкость тоже —то хоть не так критично, если есть запас на несколько дней...