Does anyone have information about the Musica ibuki or 30int? Scheme.
High Fidelity
Musica Series30 INT Vollverstärker | sound@home news blog
I have a great curiosity to know how it is that these amps sound so good. Looking at the photos of the interior are only a couple of TDA2005 and some components.
In the photos you can not see the values of the capacitors, but counting them and comparing with the design that appears on the datasheet of the TDA2005, it appears is the same thing.
I would like to know if there is any difference with the datasheet. It seems impossible that a design so simple, and with so basic chip, sound so well how to say in tests.
Anticipated thanks.
High Fidelity
Musica Series30 INT Vollverstärker | sound@home news blog
I have a great curiosity to know how it is that these amps sound so good. Looking at the photos of the interior are only a couple of TDA2005 and some components.
In the photos you can not see the values of the capacitors, but counting them and comparing with the design that appears on the datasheet of the TDA2005, it appears is the same thing.
I would like to know if there is any difference with the datasheet. It seems impossible that a design so simple, and with so basic chip, sound so well how to say in tests.
Anticipated thanks.
This chip is usually for car radios, with a single 12V power supply. There's even better sounding chips such as the LM3886 with more power and less distortion but requiring a dual power supply up to 2x35V.
Jacques
Jacques
Hello,
Yes. That's the reason I'm curious. Seems that the people of Musica knows something that others do not know, to get that sound quality.
Cheers
Yes. That's the reason I'm curious. Seems that the people of Musica knows something that others do not know, to get that sound quality.
Cheers
If you read the test you linked then you can see that they didn't like it.
So I'm not sure what you mean by "to get that sound quality". They use a switching psu that is seriously strange. From 500 euro anyone can make the same or better sound. Starting by changing the psu to a better as also written in the test.
So I'm not sure what you mean by "to get that sound quality". They use a switching psu that is seriously strange. From 500 euro anyone can make the same or better sound. Starting by changing the psu to a better as also written in the test.
Well. In highfidelity.pl created a new distinction when test that system, yes, mainly by the DAC, but of the amplifier say their primary skill is in its midrange reproduction, which is the range for which the ear is most sensitive.
Moreover, the fact is that the amplifier costs about 800€ and it seems that people pay, they find the price justified by sound quality.
Why it is nothing strange that be curious about this design. What's inside it only costs a few euros, and yes, the supply is a cheap switched type. How do they do? It's what I want to know.
Cheers
500€ (or more) for THAT? That's a f***ing joke. Sure the case is spiffy, and the form-factor is unusual, but still...
It's probably a really low-volume ("boutique") item, and looking at the PCB, I wouldn't be surprised if the design dated back to times when TDA2005s were a lot more mainstream (1990-ish maybe?). Plus the Yen is quite high nowadays.
(How old are these chips anyway? The first datasheet edition apparently is from 1998, but the schematic shown is 100% pure late-'70s/early-'80s.)
I'm not surprised it would be doing best (or least badly) in the midrange. In the bass there's thermal feedback and possibly output coupling cap distortion as well, plus the amp is most likely to be running into its modest power limits down there (about 11-12 W into 3.2 ohms even in BTL), and the highs would show a good amount of crossover distortion.
With the quasicomp output stage as usual in chip amps, distortion might not be as bad-sounding as the numbers may suggest, but I wouldn't expect any miracles.
I hope they dropped voltage gain to the minimum allowed of 32 dB in BTL mode at the very least. The datasheet test circuit gives a gain of 50 dB, which would result in the amp being rather hissy (about 1 mV or ~10 dB worse than on average-performing hi-fi integrated amps/receivers, for a maximum SNR of ~75 dB), not to mention a first-rate distortion generator. Hiss subjectively makes sound "softer" though, and some people may actually like that...
It's probably a really low-volume ("boutique") item, and looking at the PCB, I wouldn't be surprised if the design dated back to times when TDA2005s were a lot more mainstream (1990-ish maybe?). Plus the Yen is quite high nowadays.
(How old are these chips anyway? The first datasheet edition apparently is from 1998, but the schematic shown is 100% pure late-'70s/early-'80s.)
I'm not surprised it would be doing best (or least badly) in the midrange. In the bass there's thermal feedback and possibly output coupling cap distortion as well, plus the amp is most likely to be running into its modest power limits down there (about 11-12 W into 3.2 ohms even in BTL), and the highs would show a good amount of crossover distortion.
With the quasicomp output stage as usual in chip amps, distortion might not be as bad-sounding as the numbers may suggest, but I wouldn't expect any miracles.
I hope they dropped voltage gain to the minimum allowed of 32 dB in BTL mode at the very least. The datasheet test circuit gives a gain of 50 dB, which would result in the amp being rather hissy (about 1 mV or ~10 dB worse than on average-performing hi-fi integrated amps/receivers, for a maximum SNR of ~75 dB), not to mention a first-rate distortion generator. Hiss subjectively makes sound "softer" though, and some people may actually like that...
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Yes, seems a joke. But the fact is that everyone who has heard them speak well of them, and used with quality speakers, how Revolver Music 3:
Bedroom system | whathifi.com
HiFiVision.com - Audio Video Hi-Fi Forum
http://www.hifilive.es/2011/07/06/revolver-music-3-musica-ibuki-acoustic-y-ovaide/
And I agree with you: the TDA2005 is not a great amp. So I would see the scheme. What's so special? In the photograph of the int30 apparently is using low ESR capacitors, an some, as the 2,2uF input, seems Nichicom Muse.
But I doubt that the only difference is the quality of the capacitors. I suppose there will be any difference in the scheme, I wish I could have to allow comparison with the one in the datasheet, and see what that is so critical to the quality of sound.
Cheers
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