are you able to put together a case designed to house and properly cool 4 1200as2 (or 2x1200as2 and 2+ lower wattage ice power amplifier) for an 8+channels? Something similar to the buckeye nc502 8channel amp, but with 4 high power channels for mains/subs and "normal" options for the rest? I think a mesh front and 4 low noise fans with a pcm controller would make it super convenient, cool, and would work super well.
@@guntarssmits2104 Awesome. Definitely sign me up for two, as long as they have provisions for active cooling. Would the 2000as2 also work in the above for a pair of subs, seems pin compatible? One more question, are you able to mount the 1200as2 to a heatsink in the unit, so forced airflow could be used for direct cooling vs the case. I understand this is a way bigger ask, but you are the expert and I am not. I've read a few reports from people who have had 1200as2 failures, attributed to poor cooling, obviously not your design! Not read anything negative on your design at all, but it makes me wonder.
@@scotkight1821@scotkight1821 It will work with 2000AS2 as well, but the case can accommodate one 1200AS2/2000AS2 and two 200AS2, still having six channels. If you need more, it is possible to combine it with the TCR1200Pro kit and drive all with a 12V trigger. I will make a more detailed video prior to the product release.
Not a bad amp. Nice army of Chemicon (?) 80V caps. But why this toroidal FE powder chokes for output filtering? This really is somehow annoying. I want to see MnZn flat wire chokes with stable current characteristics and less distortion.
The measurements did not show distortions, Probably, the solution is right. There are different types of ferrite materials available. We should choose the right one. For large switching power devices toroidal shape is good because magnetic lines naturally close into the ferrite and reduce switching noise radiation. For class d filters, gapped toroids are used which is not possible to saturate.
Seriously? Which book tells you to use stock filter for crossover? By stock filter I mean the active analog crossover like CX3400. You're not using the flat frequency response driver and how are you going to get proper summing of frequency response by that?
Modern loudspeakers are so good and have high linearity frequency characteristics. I know that there are fans of digital crossover at-home solutions, but in reality, you do not need those corrections. Once you get rid of the passive crossover built into the speaker system you are already at a different sound reproduction level. CX3400 with 24dB slope and linkwitz riley filter gives a significant performance upgrade when speakers are connected directly to the amplifier output. Yes, you need 6 amplifiers for the 3-way stereo system, but speaker reproduction tolerance improves dramatically. I made such a system for tests and there is fantastic performance improvement.
@@guntarssmits2104 No. You don't even have linear enough on axis frequency response. Just do the measurement with calibrated mic. It's much important compare to the distortion produced by the amplifier. A poorly implemented active analog crossover ain't going to be better than the well designed passive crossover.
I did it. And you can get pretty good results at the listening position. In a small room, you can not compensate for all reflection artifacts even with DSP, but by dealing with the right placement, we can achieve good results. But I agree that it is not a recording studio result.
Maybe you are right, but there should be a facts-based explanation. I tested 1200 with test signals on resistive and real 3-way complicated crossover load as well as pulse response from speakers and did not find any artifacts at high frequencies. Also, high-quality piano music did not show anything. It was crisp and clear. Piano music is susceptible to distortions, and you can hear them on overtones. Also, tweeter self-generated THD is between 1%-2.3% for consumer speaker systems at high frequencies. In audio signals at loud listening levels, high frequencies power is about 1W -10W, mostly closer to 1W, and easy to drive. The audio signal at the studio level has a hard 60dB filter to cut frequencies above 20kHz and there are no overtones. The pulse signal in the audio path is becoming sinewave above 10KHz because the second harmonic is filtered out. I also did not find any internet source with measurements showing 1200 problems at high frequencies. But that does not mean that you are not right. We just need scientific proof.
I have your amplifier and it is great. Absolutely no noise. Had several other very established brands and it is not even close.
are you able to put together a case designed to house and properly cool 4 1200as2 (or 2x1200as2 and 2+ lower wattage ice power amplifier) for an 8+channels? Something similar to the buckeye nc502 8channel amp, but with 4 high power channels for mains/subs and "normal" options for the rest? I think a mesh front and 4 low noise fans with a pcm controller would make it super convenient, cool, and would work super well.
I made 1200AS2+2x200AS2 6 channel version for 3-way active systems and home cinema. it will be in the market till the calendar year
@@guntarssmits2104 Awesome. Definitely sign me up for two, as long as they have provisions for active cooling. Would the 2000as2 also work in the above for a pair of subs, seems pin compatible?
One more question, are you able to mount the 1200as2 to a heatsink in the unit, so forced airflow could be used for direct cooling vs the case.
I understand this is a way bigger ask, but you are the expert and I am not. I've read a few reports from people who have had 1200as2 failures, attributed to poor cooling, obviously not your design! Not read anything negative on your design at all, but it makes me wonder.
@@scotkight1821@scotkight1821 It will work with 2000AS2 as well, but the case can accommodate one 1200AS2/2000AS2 and two 200AS2, still having six channels. If you need more, it is possible to combine it with the TCR1200Pro kit and drive all with a 12V trigger. I will make a more detailed video prior to the product release.
@@guntarssmits2104 awesome, thank you!
Not a bad amp. Nice army of Chemicon (?) 80V caps.
But why this toroidal FE powder chokes for output filtering? This really is somehow annoying.
I want to see MnZn flat wire chokes with stable current characteristics and less distortion.
The measurements did not show distortions, Probably, the solution is right. There are different types of ferrite materials available. We should choose the right one. For large switching power devices toroidal shape is good because magnetic lines naturally close into the ferrite and reduce switching noise radiation. For class d filters, gapped toroids are used which is not possible to saturate.
Seriously? Which book tells you to use stock filter for crossover? By stock filter I mean the active analog crossover like CX3400. You're not using the flat frequency response driver and how are you going to get proper summing of frequency response by that?
Modern loudspeakers are so good and have high linearity frequency characteristics. I know that there are fans of digital crossover at-home solutions, but in reality, you do not need those corrections. Once you get rid of the passive crossover built into the speaker system you are already at a different sound reproduction level. CX3400 with 24dB slope and linkwitz riley filter gives a significant performance upgrade when speakers are connected directly to the amplifier output. Yes, you need 6 amplifiers for the 3-way stereo system, but speaker reproduction tolerance improves dramatically. I made such a system for tests and there is fantastic performance improvement.
@@guntarssmits2104 No. You don't even have linear enough on axis frequency response. Just do the measurement with calibrated mic. It's much important compare to the distortion produced by the amplifier. A poorly implemented active analog crossover ain't going to be better than the well designed passive crossover.
I did it. And you can get pretty good results at the listening position. In a small room, you can not compensate for all reflection artifacts even with DSP, but by dealing with the right placement, we can achieve good results. But I agree that it is not a recording studio result.
I still dont know how icepower works, I just know how hypex work, with NFB after coil filter, but purifi & ice, still mistery
What's the mistery of Purifi? It has PFFB and it's very easy to find the description about it.
IMHO in an active speaker Icepower is great for bass, good enough for midrange but needs a class AB tweeter amplifier.
Maybe you are right, but there should be a facts-based explanation. I tested 1200 with test signals on resistive and real 3-way complicated crossover load as well as pulse response from speakers and did not find any artifacts at high frequencies. Also, high-quality piano music did not show anything. It was crisp and clear. Piano music is susceptible to distortions, and you can hear them on overtones.
Also, tweeter self-generated THD is between 1%-2.3% for consumer speaker systems at high frequencies. In audio signals at loud listening levels, high frequencies power is about 1W -10W, mostly closer to 1W, and easy to drive. The audio signal at the studio level has a hard 60dB filter to cut frequencies above 20kHz and there are no overtones. The pulse signal in the audio path is becoming sinewave above 10KHz because the second harmonic is filtered out. I also did not find any internet source with measurements showing 1200 problems at high frequencies. But that does not mean that you are not right. We just need scientific proof.
What he is saying, is that he likes noise on the high frequencies to make it sweeter…. lol