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Marvelous sound were flown out from a tiny plastic speaker. Digital inputs were 2 ways coaxial and optical.

I’m happy it looks so nice regarding flush. It should be based not on frequency responce but on impulse responce. I was about to eat them by mistake. I asked 2ch liver, brilliant mind in Japanese largest internet discussion board, for instruction and I finally got the solution. Unit sounds based on this enclosure, so if this standard point moves, unit cannot reproduce true sound.

Technics turntable — modifying SLMK3 This catch phrase is “realizing ritch bass and well spread mediant and treble”. Avoiding incoming noises from unused digital input, I used relay and would hook up with one-side of digital input to DAI. They adopt current output, so we can use plurality of them in parallel. In order to suppress switchinig noise of regulator, setting a PI Low-Pass-Filter which is built by capacitors and toroidal core coil.



I regret I’ve not use a flash. For larger image, please click. Please do at your own risk. I’m ashamed of the sight which have been datassheet BG-C as smoothing capacitor. I felt a bit of luxury. I replaced ohm resistor with ohm one and adjasted potentiometer, then I got very clear sound. First floor is the part of digital and second is the one of analog. For example, used only a resistor, buffer of OpAmp, buffer of vacuum tube, impedance matching circuit of line transformer and so on.

It cannot be a responce of “sound”.

I want to try parallel use. I planned to set chip capacitors which had about 0. Bass reflex is wrong regarding reproducing the original sound.

I often find DAC kits that adopt 2, 4 or 8 inparallel when I’m roaming the net. We usually adopt fc cut-off frequency of LPF 74hc7a4p fs in order to remove aliasing noise. When I watch a movie without lamp, it produces a flavor of romantic mood. Frequency response is a responce of sin wave.


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Para-using of TDA was famous method to improve sounding. Speaker unit should be grounded on completely unmoved point. Was its reason time lag caused by the differences of the path-length? I drilled a small hole. This was in my dataseet luckily. It was very easy to process acrylic material.

(PDF) 74HC74AP Datasheet download

I finally found CS in web. N is the sum of datashee which is added from 0Hz to I reviewed the wiring of GND, removed re-clock circuit and adjasted potentiometer, but I couldn’t get clear sound. I thought its difference would be very small. It is not good to adopt negative feedback when you want true source sound. I adopted the method of used only a resistor because I wanted to get true sound. Its bass might be cut off, so I added 2.

I was happy to have closed in true sounding.