Why not just use the miniDSP PWR-ICE amps? They use the ASX2 icepower boards with good buffers. They have two with DSP and one without.
And the problems with the Sprout are all in the front end. PS Audio have always been con artists rather than purveyors of serious gear.
And the problems with the Sprout are all in the front end. PS Audio have always been con artists rather than purveyors of serious gear.
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Thanks Pallas, I was not aware of those.
MiniDSP PWR-ICE125WD ASX2 Amplifier module 450W / 4 Ohm - Audiophonics
£167X4=😱
I feel this would be paying a lot more money for what may be a lesser sound quality, when the Anaviews could be comparable to the Ncores.
Actually, I am quite interested in the Anaview boards not having input buffers, since with the right preamp you can avoid this extra circuitry - something the Najda preamp can manage apparently.
MiniDSP PWR-ICE125WD ASX2 Amplifier module 450W / 4 Ohm - Audiophonics
£167X4=😱
I feel this would be paying a lot more money for what may be a lesser sound quality, when the Anaviews could be comparable to the Ncores.
Actually, I am quite interested in the Anaview boards not having input buffers, since with the right preamp you can avoid this extra circuitry - something the Najda preamp can manage apparently.
Bench racing can be fun, but competently implemented all of those boards make amps with low noise and de minimis variance in FR with changing loads. There will be no real sonic difference. Just as the "huge gap" between Hypex UcD and Ncore is aurally irrelevant.
Incompetently implemented, all of those boards will sound different, though.
Indeed, the possibility that they sound similar is another reason I do not want to spend too much, hence the cheapest option of ALC0100 and AMS180 looking promising. I'll at least try and get the minimum power output recommended for the Nao Note II whatever I do.
As a straight power amp (unlike the Audio Sprout), I'm hoping I will not mess up the implementation. I expect I just need to be sure to get the gain structure right.
As a straight power amp (unlike the Audio Sprout), I'm hoping I will not mess up the implementation. I expect I just need to be sure to get the gain structure right.
Hi Sac,
With ASX2 modules and Najda DSP you MUST use an input buffer for the amp.
Input impedance is under 6k at 20 kHz, cf. :
http://www.diyaudio.com/forums/class-d/192789-icepower-125asx2-measurements-mods.html#post2642203
My active configuration, is Najda DSP and two 50ASX2 SE modules.
With ASX2 modules and Najda DSP you MUST use an input buffer for the amp.
Input impedance is under 6k at 20 kHz, cf. :
http://www.diyaudio.com/forums/class-d/192789-icepower-125asx2-measurements-mods.html#post2642203
My active configuration, is Najda DSP and two 50ASX2 SE modules.
I used a NAD 12-channel amp (NAD CI 9120 ) that is normally used for zone PA systems. It enabled me to use a seperate channel for each of the 4 woofers as I used XLS 830452 which are 4 ohm and seperate channel for each tweeter if needed.
Looking to part with it if anybody is interested.
Looking to part with it if anybody is interested.
Indeed, I found a Najda user who had to use buffers with the icepower, but upon changing to the Anaviews, this was not needed.
Currently enjoying the following option;
AMS0100 X2
8ohm 2X25W <1%THD (4ohm 2x50W <1%THD)
ALC0180 X2
8ohm 2X50W <0.5%THD (4ohm 2x90W <0.7%THD)
Bear in mind I am using three 15" drivers for my fourth channel, not the dual 10" drivers in John's design.
I am very happy with this arrangement. Much better sounding than my previous amps (41Hz amp6 X2, amp9b X2, four laptop PSU bricks).
AMS0100 X2
8ohm 2X25W <1%THD (4ohm 2x50W <1%THD)
ALC0180 X2
8ohm 2X50W <0.5%THD (4ohm 2x90W <0.7%THD)
Bear in mind I am using three 15" drivers for my fourth channel, not the dual 10" drivers in John's design.
I am very happy with this arrangement. Much better sounding than my previous amps (41Hz amp6 X2, amp9b X2, four laptop PSU bricks).
I want to second the Najda/Anaview recommendation. I have the Najda feeding three AMS1000 modules. No buffers. It sounds fantastic. The Najda output is single-ended only but you can adjust the output voltage for each channels' output stage. Maybe the AMS1000 is a bit of overkill for a tweeter... these modules are not inexpensive. I think the specs are pretty much blameless however. And the tidy design of amp+PSU on a 3-sided box-like heat sink is convenient.
I run four channels per speaker (not NaO but diy 4-way dipoles) with B&O ICEpower50 and 125 modules in same aluminium box. Minidsp 4x10HD. Does not get too hot despite the box is closed. Got the modules from eBay, but now we have some consumer retail sellers in Europe like Audiophonics : Achats de Produits Hi-Fi Audio Electroniques et DIY - Audiophonics and Ghentaudio
Emotiva has nice multichannel amps and pro world gives many options Thomann
Just start with something cheap or second hand and update later on! Ultimately Krell or McIntosh monoblocks for each channel!
Emotiva has nice multichannel amps and pro world gives many options Thomann
Just start with something cheap or second hand and update later on! Ultimately Krell or McIntosh monoblocks for each channel!
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Hi,
You are using AMS1000 for a tweeter 😱
Guess that the the AMS 100 (not 1000) modules should be sufficient for high and medium section !
You are using AMS1000 for a tweeter 😱
Guess that the the AMS 100 (not 1000) modules should be sufficient for high and medium section !
Hi pguerin, AMS-0100 according to the datasheet can deliver 2x25w into 8ohms at 1%THD, and the distortion plot starts to go vertical after that. AMS-1000 is good for 2x170w at the same. Check out the distortion graphs for both modules... wouldn't you rather have your transient peaks in the region where THD is more like .005% and not rising? I guess for the Nao the AMS100 would be adequate, however.
In any case, I'm not using these to power a Nao. My point is that these Anaview amps are not nearly as powerful as their name designations would suggest if you want the cleanest possible output. And who knows what the next project's power requirements might be? IMO there's many more foolish things to throw a couple hundred dollars at in DIY audio😀
In any case, I'm not using these to power a Nao. My point is that these Anaview amps are not nearly as powerful as their name designations would suggest if you want the cleanest possible output. And who knows what the next project's power requirements might be? IMO there's many more foolish things to throw a couple hundred dollars at in DIY audio😀
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