Yamamoto Sound Craft HA-02
Oct 10, 2006 at 6:34 PM Thread Starter Post #1 of 1,351

braillediver

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Yamamoto Sound Craft HA-02

HA-02-2.jpg


Mitch
 
Oct 10, 2006 at 11:52 PM Post #5 of 1,351
Quote:

Originally Posted by mrarroyo
That is beautiful, is it a hybrid? what are the tubes it uses? How much? Thanks.


It's a 408A/6028, which is a sharp-cutoff pentode. I assume it's connected as a triode.
 
Oct 11, 2006 at 11:34 AM Post #7 of 1,351
I have tried it on the last weekend at tube-audio festival in Tokyo.



It has connected with iPod. The mid to high is sweet and sound like other Yamamoto SET amps, I like the sound but I hear slight hum noise from the demo machine.
The tube is Western vintage 408A as Carl san said. the price is 88000 yen. I am not sure the availability in US.

Other headphone amp from the show is softon model 6. it has build in USB-DAC and use one 6922(6DJ8). the price is 47000 yen.

 
Oct 11, 2006 at 2:01 PM Post #9 of 1,351
Here's a link to the release sinformation:

http://www2.117.ne.jp/%7ey-s/HA-02-new-e.html

HA-02-2.jpg


HA-02rear.jpg


HA-02 specifications Use vacuum tube: Only WE408A 2 tubes / Sircuit system: Single stage amplification, pentode connection, and non-feedback system / Maximum output :300mW (at the time of 50ohm load) of headphone terminals,240mW (at the time of 8-ohm load) of speaker terminals/ Frequency characteristic:30-21,000Hz (headphone terminal) 45-17,000Hz (speaker terminal) / Gain : Headphone output power 9.5dB (at the time of 50-ohm load) Speaker output power: 1.5dB (at time of 8-ohm load) / Remains noise: 100 microvolts of headphone output power 70 microvolts of speaker output power / Outside dimension: 150 (W) 325 (D) 125 (H) / Weight: 3.5kg Price: 88,000 yen

?@
 
Oct 11, 2006 at 3:39 PM Post #10 of 1,351
At the time 6moons reviewed their A-08 amp, I remember a comment that Yamamoto would be releasing a headphone / speaker amp. I thought it would be the A-08 with a headphone output, which IMO, would have been a killer product.

Anyone know what kind of speakers the HA-02 could drive? The Zu Druids are 101db. I realize 101db is 101 db, but still, could this drive a cone of that size?

I also wonder about hum. Yamamoto released the A-08s to address the issue, and Sasaki also noticed it in this amp. Was it significant Sasaki? Or were you nit-picking? Any more comments on the overall sound?

Thanks.
 
Oct 11, 2006 at 5:00 PM Post #12 of 1,351
I admit the hum is a sort of "nit-picking". It is not noticeable in normal listening volume level.

I took a listen for very short period and surroundings is so loud by the A-08S sound, so I can not comment further but I like the sound. I want to try it again in good listening condition.

Quote:

Originally Posted by Dartagnan
I also wonder about hum. Yamamoto released the A-08s to address the issue, and Sasaki also noticed it in this amp. Was it significant Sasaki? Or were you nit-picking? Any more comments on the overall sound?

Thanks.



 
Nov 22, 2006 at 3:13 AM Post #14 of 1,351
Quote:

Originally Posted by tjkurita /img/forum/go_quote.gif
Wow...

The wheels start spinning. Can I afford it? What can I sell to get it?

...



You and me, both, John.

I just shot off an email inquiry to the U.S. distributor, Venus HiFi in E. Lansing, MI. I'll post the response.

Anyone interested in a mini group buy to try to get some price leverage?
 
Nov 22, 2006 at 3:18 AM Post #15 of 1,351
I ordered one earlier today. Brian at Venus said he expected some more to arrive in 3-4 weeks.
 

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