Overview X-XA-XS-Power Amp Series - Elcaps using both in large and small Outline-why?

[tiefbassuebertr]

In power amplifiers of this series are to find two kind of electrolytic capacitors behind the rectifier :

A. Large can versions with screw terminals and low-ESR e. g.
FTcap (F&T) GMB 47310075145 (Ø 75mm x 145mm, ESR = 3-4 mΩ)
%product-title% kaufen
or similar like Mallory, Cornell-Dublier or Sprague
NOS Mallory 10,000UF 75VDC CGS103U075V3C Electrolytic Can Capacitor.
https://static6.arrow.com/aropdfcon...f45da10ee14f2ad1ac33/3632267624208725550c.pdf
Sprague 36DE213G050BB2A 21000uF 50V Aluminum Electrolytic Capacitor: Amazon.com: Industrial & Scientific

The following models use this kind of capacitor
1) X-150 (not X-150.5)
2) X-350, X-350.5, X-350.8
3) X-600, X-600.5
4) X-1000 (from X-series first amplifier ever)
5) XS-150 (two devices /each channel due to outdoor power supply)

B. Small versions (mounting type "Snap-In") with high capacity in large quantity e. g.
Panasonic ECO-S1HP103CA (Ø 25mm x 50mm, ESR = 36/27 mΩ)
Blocked
or similar:
Nichicon LLS1K472MELA/LLS1J682MELA/LGU1H682MELA/LGU1J472MELA
https://uk.rs-online.com/web/p/aluminium-capacitors/8526298/
https://eu.mouser.com/ProductDetail/Nichicon/LLS1J682MELA?qs=CTiUoleKpMEAuBr9VqiAJg==
https://uk.rs-online.com/web/p/aluminium-capacitors/1671486/
https://uk.rs-online.com/web/p/aluminium-capacitors/8466962/
EPCOS B41252A8478M000
https://uk.rs-online.com/web/p/aluminium-capacitors/7714721/
Vishay (formerly BC) MAL225631682E3
https://uk.rs-online.com/web/p/aluminium-capacitors/1730638/
KEMET (formerly BHC-Aerovox) ALC70A472BD063
https://mt.rsdelivers.com/product/k...μf-electrolytic-capacitor-63v-dc-snap/1813462

The following models use this kind of capacitor - at least according the top view images without cover:
1) X-150.5 (not X-150)
2) X-250, X-250.5, X-250.8
3) XA-25
4) XA-30.5, XA-30.8
5) XA-100.5
6) XA-200, XA-200.5

The great advantage of using large can versions are lowest ESR, very reliable and very long life time 10000-15000 hours) so as best possible sound results in all respects.
Disadvantage here is high space requirement and very high costs, even when considering volume discounts.

The great advantage of using small versions is very low cost and the very little need of space required with a very high total value of capacity. Disadvantage here is the short life time around 2000-4000 hours -at least according the datasheets and poor dynamic behavior in listening tests compared to bulky and space-consuming capacitors with screw terminals.

And now my questions:
1) What is it based on, when to use the small (Ø 25mm) caps (small cv product) and when to use the large capacitor cans with screw terminals?
2) When buying X-XA-XS power amp devices in used condition, it is better to prefer the ones with screw terminated can electrolytic cap versions ?

Thank you very much for an advice.
In the attachment images from X-150 and X-150.5

 

[Zen Mod]

price break and overall cost in drekload quantities?

who's gonna complain (for size) if Pa put them enough, while he's happy camper, having stash for, say, 3 yrs production

 

[tiefbassuebertr]

X-250 vs. X-350

more images

 

[tiefbassuebertr]

X-250.5 vs. X-350.5

more images

 

[tiefbassuebertr]

X-250.8 vs. X-350.8

more images

 

[tiefbassuebertr]

XA100.5 vs. XA-200.5

XA-200.5 does not have to be filed under B but under A.

 

[tiefbassuebertr]

XS-150 & XS-300

Separate units for amplifier and power supply

 

[tiefbassuebertr]

X-1000 & X-600.5/X-600.8

From X-1000 no image with internal view online

 

[analog_sa]

poor dynamic behavior in listening tests compared to bulky and space-consuming capacitors with screw terminals.

Not convinced this is universally true.

 

[tiefbassuebertr]

XA-30.5 & XA-30.8

small output power

 

[2 picoDumbs]

Not convinced this is universally true.

Me either.

 

[Zen Mod]

yup

another Audio Myth (generalization)

not going in possible longevity differences

 

[2 picoDumbs]

I would be way more interested in the total power supply design eg What VA rating, what bridge rectifiers, what total capacitance, what configuration eg is it crc, what mains filtering is used, what grounding technique is used, cable routing, ground lift etc.

I just caveman my power supplies, it seems to be very effective, but I'm always interested in comparing or learning something new.

 

[Nelson Pass]

Caveman approach is perfect for DIY.

 

[tiefbassuebertr]

this company ?
https://cavemanvintage.com

 

[2 picoDumbs]

Caveman approach is perfect for DIY.

this company ?
Caveman Vintage Music | Vintage musical instruments & records located in the Lincoln Heights neighborhood of Los Angeles

Like this

 

[tiefbassuebertr]

Not convinced this is universally true.

Some even claim that this is untrue - e. g. the developer of the amp devices from Einstein and Densen - go to attached images:
But so far I am absolutely convinced this is true in general ( at least from the capacitor brands that I know).

 

[2 picoDumbs]

I think if you're only running a single pair of capacitors, then I would tend to think the difference between different brands could be significant but once you employ crc and start paralleling a stack of capacitors, I think the differences become far more subtle.

 

[2 picoDumbs]

Nice pictures.
Keep posting.

 

[Jeffreyjuice]

I would be way more interested in the total power supply design eg What VA rating, what bridge rectifiers, what total capacitance, what configuration eg is it crc, what mains filtering is used, what grounding technique is used, cable routing, ground lift etc.

I just caveman my power supplies, it seems to be very effective, but I'm always interested in comparing or learning something new.

Hi Pico,
Speaking of the "Caveman Approach" what's going on with your power supply board?
Jeffrey