ICEpower Conductor

[Foxxy]

Hmm, but where can you get them? I have an old 125ASX2 amp so the prospect of just getting a new board and have a nice upgrade is tempting.

 

[Sokel]

Hmm, but where can you get them? I have an old 125ASX2 amp so the prospect of just getting a new board and have a nice upgrade is tempting.

ICEpower 125ASX2 - ICEpower Shop

Combining a highly efficient resonant gearbox power supply with an audiophile class D amplifier of 2×125 W at 4 Ω, bridgeable to 1×450 W at 4 Ω. Very popular for bass amplifiers, subwoofers, stereo home automation and hifi amplifiers as well as industrial applications.

shop.icepoweraudio.com

 

[Foxxy]

ICEpower 125ASX2 - ICEpower Shop

Combining a highly efficient resonant gearbox power supply with an audiophile class D amplifier of 2×125 W at 4 Ω, bridgeable to 1×450 W at 4 Ω. Very popular for bass amplifiers, subwoofers, stereo home automation and hifi amplifiers as well as industrial applications.

shop.icepoweraudio.com

Yeah, but the import tax would kill any price efficient gains. I hope for a retailer who would sell them for 250 Euro.

 

[Sokel]

import tax

???
It's an EU based product, don't think you get a hit.
Here's for less than 250 euro, just make sure with them that is the new Conductor version:

Order ICEpower 125ASX2 Amplifier module

Buy the 125ASX2 online at SoundImports ✓ Same day shipping ✓ Low shipping rates

www.soundimports.eu

ICEPOWER 125ASX2 Class D Stereo / Mono Amplifier Module 2x215W / 1x450W 4Ω - Audiophonics

The ICEpower 125ASX2 is a compact Class D amplifier module that can operate in both stereo and mono. It is thus capable of delivering a power of 2x125W under 4Ω or 1x450W under 4Ω, while ensuring a precise and detailed sound reproduction.

www.audiophonics.fr

 

[Rac]

I've been a long time reader but never posted here.
I've got confirmation from SoundImports that all the stock they have of the 125asx2 is the current conductor model with the iccc5 chip also.
I've ordered one so I'll do some tests compering it to my 400a2 and 1200as2 with my e1de cosmos gear when it arrives.
I'll be using the 125asx2 to run the tweeters on my 3 way active speakers(sb34nrxl75-8, 15m-4624g, sb26cdc with 6in waveguide) run through a flex 8 ht.

 

[Sokel]

I've been a long time reader but never posted here.
I've got confirmation from SoundImports that all the stock they have of the 125asx2 is the current conductor model with the iccc5 chip also.
I've ordered one so I'll do some tests compering it to my 400a2 and 1200as2 with my e1de cosmos gear when it arrives.
I'll be using the 125asx2 to run the tweeters on my 3 way active speakers(sb34nrxl75-8, 15m-4624g, sb26cdc with 6in waveguide) run through a flex 8 ht.

That's really good to know, hope you post the results here.

 

[Rac]

That's really good to know, hope you post the results here.

I will do.

 

[Rac]

Well my 125asx2 conductor has turned up.
It has the small rectangle chip so is a conductor version. I've got a Cosmos ACDasio and Scaler with an e50 dac so have done some tests. First impressions is it's better than the old model(looking at the tests on ASR) but not by alot and I'm not seeing the same results that the data sheet has for 6khz thd. My 400a2 and 1200as2 has better 19-20khz imd and multi tone.
The 125asx2 has a lower noise floor but has more power supply noise. The power supply in the 1200as2 must be a bit better?
I've had a play moving the wiring around but both channels test the same and no improvement is seen. Normally after I've put an amp together I'll look a the multitone test without averaging and find the best place in the case for the input and output wiring.
It's flatter out to 20khz than the old model and the edge versions.
I think it should be perfectly fine for my use case of running tweeters in a 3 way active setup but a 300a2 or another 400a2 may have been a better choice but may not make any difference in the real world.


400a2 is blue, 125asx2 red. Apart from the power tests everything is done at 5Watts into 4 ohms.



19-20khz imd


This is 1khz and 6khz for each amp. Dark colours are 1khz.

 

[Sokel]

Well my 125asx2 conductor has turned up.
It has the small rectangle chip so is a conductor version. I've got a Cosmos ACDasio and Scaler with an e50 dac so have done some tests. First impressions is it's better than the old model(looking at the tests on ASR) but not by alot and I'm not seeing the same results that the data sheet has for 6khz thd. My 400a2 and 1200as2 has better 19-20khz imd and multi tone.
The 125asx2 has a lower noise floor but has more power supply noise. The power supply in the 1200as2 must be a bit better?
I've had a play moving the wiring around but both channels test the same and no improvement is seen. Normally after I've put an amp together I'll look a the multitone test without averaging and find the best place in the case for the input and output wiring.
It's flatter out to 20khz than the old model and the edge versions.
I think it should be perfectly fine for my use case of running tweeters in a 3 way active setup but a 300a2 or another 400a2 may have been a better choice but may not make any difference in the real world.
View attachment 442849

400a2 is blue, 125asx2 red. Apart from the power tests everything is done at 5Watts into 4 ohms.
View attachment 442850
View attachment 442856
View attachment 442857
19-20khz imd
View attachment 442858

This is 1khz and 6khz for each amp. Dark colours are 1khz.
View attachment 442852
View attachment 442853
View attachment 442859
View attachment 442860

View attachment 442854
View attachment 442855

Looks like it takes some strong interference, maybe from 1200a2?
Did you try opposite wiring, etc?

Decent results overall but 300-400a2 still remain little (literally) marvels as it seems.

 

[Rac]

Looks like it takes some strong interference, maybe from 1200a2?
Did you try opposite wiring, etc?

Decent results overall but 300-400a2 still remain little (literally) marvels as it seems.

I can unplug the 1200as2 and there is no change what so ever. I do like the 400a2 and the 1200as2 does a great job on my 12in woofers!

 

[Sokel]

I can unplug the 1200as2 and there is no change what so ever. I do like the 400a2 and the 1200as2 does a great job on my 12in woofers!

I do the same, 2 x1200as2 for woofers (each used as mono) and 2 x 300a2 for mid-tweeters (the same), semi-active config.
I would test a new 300a2 Conductor when it's out the market though, just for the shake of engineering. 1200as2's are staying put until they break wouldn't change them.

 

[Sokel]

I can unplug the 1200as2 and there is no change what so ever. I do like the 400a2 and the 1200as2 does a great job on my 12in woofers!

Just a note, the 1kHz tests are dissimilar, 125 is tested 20-20000Hz while 400a2 20-22000Hz.
That can give a good noise penalty to 400a2.

Just for the shake of comparison.

 

[Rac]

Just a note, the 1kHz tests are dissimilar, 125 is tested 20-20000Hz while 400a2 20-22000Hz.
That can give a good noise penalty to 400a2.

Just for the shake of comparison.

Yeah i did retest the 400 limited to 20khz for the thd calculation but as there is no added noise or spikes there it didn't change anything. Sometimes when testing car amps the power supply switching frequency is around 18-20khz and then it'll make a difference by cutting it out.
The 125asx2 looks like it could be nice as a midrange amp as I run the mids 250hz-2khz.

When you said swapping the wiring around did you mean the mains phase and neutral?

 

[Sokel]

When you said swapping the wiring around did you mean the mains phase and neutral?

Yes, sometimes it works big time, sometimes does not make a difference.
If I was building an amp and see such interference though I would check filtering first, that looks like a bad diode 101, the range is broad.

 

[Rac]

Yes, sometimes it works big time, sometimes does not make a difference.
If I was building an amp and see such interference though I would check filtering first, that looks like a bad diode 101, the range is broad.

I was half expecting this as Amair's test of an older model looks similar.

 

[Sokel]

The 125asx2 looks like it could be nice as a midrange amp as I run the mids 250hz-2khz.

According to your measurements that looks like a good idea, mids and highs use little power and 400a2 looks better at that range, both at one and six kilohertz.

 

[Rac]

Yes, sometimes it works big time, sometimes does not make a difference.
If I was building an amp and see such interference though I would check filtering first, that looks like a bad diode 101, the range is broad.

It made a small change but nothing drastic.
I've had a good listing test and am very happy with it running my tweeters although it does make a small click through the tweeters when turned on and I would like a little more gain but it's OK.
I took my 6 channel amp(1200as2, 400a2, 125asx2) around to a friend's place who has some very revealing open baffle speakers. These are passive so we can swap between all three amps and his Purifi 1et400a amp. This may not be a surprise to anyone around here but we couldn't detect a single thing between all three and the Purifi.
He also has a few valve amps and those do sound different! But I prefer the class d.

In hindsight another 400a2 would have been the smart move as it tests better and the 125asx2 doesn't have a 12 volt trigger input.

 

[TNT]

What are the revision numbers on the Conductor 125AXS boards you have Rac?

See red marking:

//

 

[Rac]

What are the revision numbers on the Conductor 125AXS boards you have Rac?

See red marking:

View attachment 444982

//

I'm away from home but I do have a not very good photo. I can see 614361. The rest isn't visible in my photo.

 

[ohskigod]

Is there any information about when the upgrades to the 700as modules are gonna hit?