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Hello friends this is AudioLover again! This time I'd like to share my modified Marantz7 circuit design using 6SN7 and 6SL7, but still can use ECC83. This design is with an output protection using...

I think that's what eBay did LOL

It is surprising that somebody with so-called very high IQ can't distinguish between China and Hong Kong. No matter the product is from China or Hong Kong or Taiwan, if it belongs to either one of...

The products you keep pushing do not have amplifying function, which can be proven by testing. The passive preamplifiers are manufactured in Hong Kong. I've taken photos from the factory, which is a...

Let me tell you, or educate you, if we say we are from Hong Kong then we are from Hong Kong. NOT CHINA. At least not yet until this moment. Please DO NOT mix them up, I suggest you to read more news...

Yes and I think the manufacturer has done a lot of work on that. That's why I could have such a great listening experience.

False trade descriptions, false, misleading or incomplete information, false marks and misrepresentations of the goods provided in the course of business or the suppliers of such goods cause the...

No problem. The output impedance is 10k ohm at minimum, according to the manufacturer's user manual. I'm not sure whether the output impedance will change with voltage gain, I think you might contact...

The reason why we kept arguing is that it seems like we were discussing on different things. What I was trying to share is a passive preamp, but you might intended to share some active one/electronic...

I understand and this could be a problem when using transformers. In fact, according to designbymrk website, which states their transformers perform a frequency response ranging from 20-20kHz with...

May I introduce myself here, I am actually an electronic engineer who design medical equipment that applied in operation rooms, which I hope you guys will never use my service:P So after a long...

You was commenting about one of the highest rated passive preamp in the world, but couldn't believe that you didn't even include those transformer type, which is an obviously in-comprehensive speech....

It is not that strange because having gain options for passive preamp design such a method has been released for over 20-30 years, which was very popular in Japan, however at that time only 24 steps...

I just bought the attenuator and transformer from the manufacturer, this is reasonable to have design variations. What I hope is to share with all of you about its amazing functions, a passive preamp...

Welcome:wave:You could search "59 steps attenuator" for the whole set of attenuator and transformer. But for the full kit of passive preamp, I'm not sure. Anyone could tell if you know.

:P I understand that there are few products have a low fixed output. The number is in fact an example which just to explain the ratio of amplifying as 10 times. I could tell when we input 5V then...

Yes because this is a new concept and that's why you feel some kind of opposite qualities. This unit really changes the signal, by passive components, like what an active stage does as usual. In...

Wikipedia is monitored by many professional and discerning people, which is trustful. Otherwise what other platforms could you provide?



I'm talking about 20Hz - 20kHz audio signal from 0.2V...

Certainly. Input impedance will surely be lowered, however all CD network players and DAC support that.

First of all, those accepted terms you stated are lack of concrete evidence, at least I don't agree. For mine is supported by the Wikipedia, which is accepted by the worldwide.

Secondly, when we...

I think I've explained this part. We can amplify without a power source, if we talk about VOLTAGE amplifying.



This is a passive preamplifier with 59 steps mechanical volume control, but not...

To be more accurate, I would say that this is a passive preamplifier with input selector and volume control. For the reasons, see my previous comments:

"We have definitions to define whether this...

First of all, if we talk about the gain, I would like to stress that the gain mentioned in my work is VOLTAGE gain but not power gain. We have definitions to define whether this is active or passive....

Yes and that's a very similar design to mine! Yours also got the gain and volume selections right? But I think it should be only up to 24 steps for both mechanical volume control and transformer...

Since you guys may not have a fully understanding about this passive preamp work, just feel free to discuss with me about it, especially for its core part (the attenuator and transformer) used...