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Feastrex Hand crafted speakers

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Old 28th September 2011, 07:38 PM   #11
fulken is offline fulken  United States
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Joe,

so far you are the only one requesting, you can have easy two weeks =D
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Old 28th September 2011, 07:47 PM   #12
fulken is offline fulken  United States
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I am trying to post photo via my Picasa.

Transformer without shielding case
https://picasaweb.google.com/lh/phot...eat=directlink

Transforemr in test box
https://picasaweb.google.com/lh/phot...eat=directlink

PCM 1794 Transformers testing with RAleigh Audio DAC
https://picasaweb.google.com/lh/phot...eat=directlink

If you know better way to post photo with Picasa, please let me know!
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Old 12th October 2011, 05:17 AM   #13
fulken is offline fulken  United States
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Joe,

Your package will be shipped tomorrow. so far none is requested for demo, if you need more than two weeks, just let me know!

I used left over paper from Feastrex diaphragm for filling gap between transformer and shielded case. I put a small piece for you to play. Try to cut the paper with your hands! You will surprise how strong the paper is!!
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Old 4th November 2011, 12:08 AM   #14
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Default Feastrex finemet power supply

Hello everyone,
I am the proud owner of the new finemet Feastrex power supply. The
unit is true dual mono construction with zero feedback. It uses
finemet transformers and chokes in combination with non-electrolytic
capacitors and Cree Zero recovery diodes for rectification.

When the selector knob is pointing upward the power supply is off.
Turn the monster knob to the left and there are 5 lower voltage
settings at approximately: 7.1, 6.9, 6.7, 6.5 and 6.3 . Turn the knob
to the right and there are an additional 5 higher voltage settings at
approximately: 13.7, 14.2, 14.7, 15.2 and 15.7 volts. The ten
different voltage settings give you a great deal of flexibility for
tailoring the sound of the drivers, but at 6.5 volts the drivers are
downright magical. Once you experience the units 6.5 volt setting the
level of musical reproduction and ambiance that the Feastrex field
coil drivers are capable of delivering is immediately realized.

Kenji did not exaggerate in saying that a there was a revolutionary
change in the Feastrex power supply.

The finemet power supply improves every aspect of musical
reproduction. The bass has more weight and depth, and the 3D
imagining is greatly improved. Sound radiates in a wider pattern as
opposed to the older power supply having a more focused image. This
creates a larger soundstage and sweet spot with an image that floats
higher than ever before. The top end is clearly smoother and more
open. Natural sounding music with an unbelievably realistic decay now
flows out of the drivers as opposed to sounding more forced and
constricted with the older power supply.

The difference is astonishing. I would have never guessed that a
power supply would have made such an impact. If you own a pair of
Feastrex field coil drivers, the new finemet power supply is
unquestionably the next piece of the puzzle. The finemet power
supply improved the sound of my system more than any amplifier,
preamplifier or source component and its not even close. You will not
be disappointed.

----Beastex
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Old 4th November 2011, 09:27 AM   #15
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Hi Beastex,

Thanks for the great feedback on the finemet power supply.. I'll go get more information from Mr Teramoto on the Finemet Power supply..
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Old 4th November 2011, 11:19 AM   #16
fulken is offline fulken  United States
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We spent over a year for R&D for new power supply. We tried many different configurations, from simple constant voltage source, constant current, and all discrete circuit etc...

When field coil speaker is operating at optimum condition, they act like a audio transformer. i.g. voice coil is primary, field coil is secondary, and yoke is core....

Key concept is let speaker sing. When music signal comes from voice coil to field coil, we do not want to regulate music signal at field coil power supply. At same time, we need to supply clean DC power.

This new power supply uses no feedback, open loop design with the best components that we can get today.

Below is some pictures from prototyping...
Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.
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Old 8th November 2011, 12:34 PM   #17
fulken is offline fulken  United States
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Anyone interested for all FINEMET, 300B SET?
Power transformers, B+ Chokes, Heater chokes, Output transformers, all Finemet!

Mr. Maekawa@Feastrex Japan is working on my Takatsuki TA-300B SET. This amplifier is going to be the main amplifier for Audio Feast listening room in Nashville TN. Hopefully, Santa will bring it to my house with NF9ex...

Click the image to open in full size.

Click the image to open in full size.
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Old 8th November 2011, 08:24 PM   #18
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fulken,
I'm definitely interested in the Maekawa finemet 300B amplifier. Do you know what other tubes it uses?

Here are some pics of my Feastrex finemet power supply.---Beastrex
Attached Images
File Type: jpg powersupply1.jpg (275.4 KB, 50 views)
File Type: jpg powersupply2.jpg (271.7 KB, 35 views)
File Type: jpg powersupply 3.jpg (281.3 KB, 37 views)
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Old 8th November 2011, 08:50 PM   #19
fulken is offline fulken  United States
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beastrex,

I hope this picture answers all you questions They are stereo amplifier, not a mono block.

Click the image to open in full size.
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Old 8th November 2011, 10:57 PM   #20
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Hi Kenji,

With all that Finemet chokes and Transformers.. I'm sure the sound would be wonderful.. Keep us posted...
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