I have the Chinese Version of the SoundTown ST that has been measured here on ASR. Mine is the Sinbosen 4 channel K4-450 amp which I presume is the same as the Sountown. I can see from the measurements that the power down low is very very weak and the use as a subwoofer amp is not feasable. I am guessing there must be some kind of limiter for the lower frequencies.
My question is twofold, can an oscillator or a technician test how much power the lower frequencies are producing? And if there is a limiter how hard will it be to remove that from a Class D amp? Of course not DIY I am talking about a professional.
I have contacted Sinbosen to ask them if there is a limiter and I have recieved absolutely no reply. I have sent several messages, called, emailed and no one replies even to a greeting. Usually I have superb experience with Chinese customer service other than the poor English(that is understandable) but on this occasion and with company that is up and coming and farely large it is weird regarding their effort in having some type of ongoing customer support.
My question is twofold, can an oscillator or a technician test how much power the lower frequencies are producing? And if there is a limiter how hard will it be to remove that from a Class D amp? Of course not DIY I am talking about a professional.
I have contacted Sinbosen to ask them if there is a limiter and I have recieved absolutely no reply. I have sent several messages, called, emailed and no one replies even to a greeting. Usually I have superb experience with Chinese customer service other than the poor English(that is understandable) but on this occasion and with company that is up and coming and farely large it is weird regarding their effort in having some type of ongoing customer support.