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deandob 18th April 2006 09:44 AM

FS: Rubycon ZL 1500uF 63v for amp power supply

I'll be making a very low impedence amp power supply using the Rubycon ZL series capacitors and due to scarce nature of these caps I have to purchase them directly from Rubycon and with a minimum order of 120.

I only need 60 of these so want to see if there are others on diyaudio who may want to buy the other 60. I will split them into several lots and payment is by paypal.

Why Rubycon ZL 1500uF? For those who dont know, the Rubycon ZL series has one of the lowest impedence of any mainstream capacitor, and the 1500uF 63v is the largest capacitor they have for voltages larger than 40v. They are also reputed to sound excellent for audio.

These caps can be connected in parallel to create a capacitor bank of extemely low impedence which will be able to dump a very large current into a high power amplifier at a high speed. This characteristic will make an amp sound more dynamic due to the ability to supply the amp with high currents during a music transient (attack).

For example, a 12,000uF capacitor array can be made from 8 of these caps, and for both rails 16 will be needed. A 12,000uF ZL capacitor array will have an effective series impedence of below 0.002 ohms!

I have yet to purchase them and am just looking to recover my costs. Price will be $4 or slightly under, shipping from Australia. If you are interested, please reply to this post with indicative numbers, as I have to finalise my order in the next day or so.


KBK 21st April 2006 03:34 AM

watch that turn on surge!

JoshK 21st April 2006 04:19 PM


deandob 22nd April 2006 09:46 PM

Based on a discussion in the class D forum about the questionable benefits of an ultra low ESR supply for class D amps (could cause ringing on the power supply, internal resistance of MOSFETs etc.) I decided to go an easier & cheaper course.

Thanks to those who PM'd me, there is obviously some interest in this approach and it would work well if you had an oscilloscope to tune the ringing (which I dont) and for class A or AB amps.


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