UcD180 module choice

[FlyingRed]

Sorry if I'm covering old ground, I dipped into the 2000+ posts on the other UcD threads and couldn't answers to these questions:

What is the difference between the ST and AD versions (audible)?

Selecting modules from the Hypex webshop, it's possible to build a 2 channel amp with 2 UcD180s, 2 ST power supplies and 2 TR100 160VA transformers. However, the examples in the applications "handyworks" page show 2 HG psu - what are your recommendations, based on experience of the different power supply options? Given that my speakers only need about 10 watts (8 ohm) to drive them as loud as I need, would the smaller psu option be sufficient?

My requirement is four channels to bi-amp a pair of high efficiency horn speakers - what else should I consider when putting UcD180 based amps together?

Thanks in anticipation.

FR

[DcibeL]

The UcD180ST is the standard module, and the UcD180AD is a "high end" module. The AD uses a better input buffer, as well as some other component upgrades. It is meant to be an overall better amp module (audibly), at the same time it also costs more. IMO your choice of modules depends solely on how much you are willing to spend.

[BWRX]

Originally posted by DcibeL
The AD uses a better input buffer, as well as some other component upgrades.

Does it have other component upgrades? I thought the only difference was the use of the AD8620 on the AD instead of the NE5532 on the ST.

[DcibeL]

Hmm...I can't say for sure if it actually does have other component upgrades. I just did a quick google search and that's the information I found. I did the search again, and I guess that info comes from a dealer of Hypex modules. Here's the link.

[RX5]

hmmmmmmmmmm.. what other possible uprgade parts could it HAVE?? output cap maybe?

[v-bro]

The guy in that link claims he sells them cheap, I don't know what it costs to get them down in the US....but I buy them for 107.10 EUR.(AD version) and 71.40 EUR.(ST version) UCD180 each...
The site:
http://www.BMM-electronics.com
The direct link:
http://www.bmm-electronics.com/Produ...ctgroep_A_ID=7

I was wondering about the exact differences between the versions st/ad myself...not even the datasheets (on the BMM site) make it clear...(didn't see any measured differences...)

[RX5]

maybe its just HIS marketing cr*p...

[DcibeL]

Well I had a look at Effective Audio Mods, and he is selling Hypex modules as well as modules that he had modified, so maybe that where he is coming from with the "other component upgrades".

Sorry for all the confusion FlyingRed, I was just trying to help.

[FlyingRed]

No worries about the confusion. Hopefully someone here has experience of both ST and AD versions and tell us if/how they sound different.

Also pros/cons of the different psu choices.

FR