[rudi0504]

Ko Jo KM - 01 plus Fostex Th 900 :

Source : IPhone 4s
Dac : Venture Craft Go Dap DD1 LE with op amp Muse 02
Amp : Ko Jo KM - 01
Headphone : Fostex TH 900
Cable : Venture Craft Lod to USB
Venture Craft mini to mini LE

 

[rudi0504]

Another Variant from Ko Jo Amp KM 01 - TSUGARU cost 98700 Yen about 1100 Usd

The specification are the same , look like the different is only in finishing


http://www.fujiya-avic.jp/products/detail19631.html

 

[rudi0504]

My Ko Jo KM - 01 with headphone set up :

Source : iPhone 4s
Amp : Ko Jo KM - 01
Headphone : Sennheiser HD 700 with after market from Japan
Ultrasone Sig Pro with Oyaide after market cable
Cable : diy USB to Lod Van Den Hul Tone Arm

SQ With this set up :
My IMO

Ultrasone Sig Pro has better SQ than Sennheiser HD 700

Ko Jo KM - 01 is very good for all iems
Like Um Miracle , Fit Ear MH 335 DW , Tralucent Audio 1+2
and
all Headphone with low Impedance
Like Ultrasone Sig Pro , Sig DJ , Grado HF2, Fostex TH 900

With high impedance headphone is only good , I feel has not enough power to drive high impedance headphone like
Sennheiser HD 700 , HD 800 and Ortho like LCD 2 , LCD 3



Source : IPhone 4s
Dac : Venture Craft Go Dap DD1 LE with op amp : Muse 02
Amp : Ko Jo KM - 01
Headphone : Sennheiser HD 700 with japan after marker Cable
Ultrasone Sig Pro with Oyaide after market cable

SQ :
With additional external idevice Dac Go Dap DD 1 LE op amp Muse 02
Improve the SQ significant

With high impedance now HD 700 SQ is very good
My Sig Pro is excellent now .

Has better detail, separation , soundstage , bass detail and bass impact



With 1 small AAA battery Ko Jo KM - 01 can last about 15 hours

 

[rudi0504]

Ko Jo KM - 01 plus AK 120 stock = excellent SQ

Source : AK 120 with WAV music file
Amp : Ko Jo KM - 01
Headphone : Ultrasone Sig DJ
Cable : Venture Craft LE mini to mini angle connectors

SQ :
This set up is one of the best SQ
High : very detail and smooth
Mid : very sweet , thick and clear like tube amp midrange
Bass : is also like tube sounding amp
Separation : very good that we can imagine the instrument placement
Soundstage : is not as wide like my Wagnus Epsilon S , for portable amp is
Wider than my Pico Power.

This is my IMO

 

[rudi0504]

Ko Jo KM 01 best DAP and DACs :

Source :
As DAP : AK 120
HDP R10

Dac for IDevice : Venture Craft Go Dap DD1 LE op amp Muse 02
Venture Craft Go Dap DD1 LE op amp SM 627

 

[rudi0504]

Ko Jo simple set Up For week End :

Source : Iphone 4s With all music file In WAV format
Amp : Ko Jo KM - 01 Brass Edition
Headphone : Audio Technica ESW 11 ltd
Cable : Van Den Hul Tone Arm Cable DIY Lod to USB

SQ : very sweet sounding set Up

 

[rudi0504]

My personal impression :

The SQ from Ko Jo KM - 01
High : very smooth , detail , clear and clean high is not Harsh at all
Mid : very sweet midrange , thick and clean and Clear , Tube like midrange
Bass : is very good impact , but like Tube is not tight like solid State amp
Soundstage : you feel like In big studio recording , not like My Eagnus is very Wide and tall
Separation : very Good separation that you can detect the instrument placement very Easy .
Norse Floor : very Low norse Floor and black bacground

Overall : very sweet and intimate sounding Amp , that you can use For long Time listening , it is
Never make My Ears tired or fatigue.

Battery Life : single AAA
Can Last about 15 hours
I have tested With random songs from 10 am until next day 1 am about 15 hours
I use ultrasone Sig DJ as test
Volume is about 90 %

Minus : only one Ko Jo KM - 01 change the colour , because the casing made from
Solid Brass dye CNC and not treated again rust .

Suggestion : handle with care , wrap with soft cloth and anti slip mate.
Every time After exchange the battery please wipe with very soft cloth
For eye wear

 

[rudi0504]

My Ko Jo KM - 01 with external dac IBasso DB2

Source : AK 120
Dac : IBasso DB2
Amp : Ko Jo KM- 01
Iem : UM. 3 DD
Cable : sys Concept Canada optical cable
Wagnus mini to mini

Sound Quality : high end portable iem set up

 

[Mimouille]

It is too bad that I have sold the ak120 because I love the look of this amp. Thanks for all the pics Rudi

 

[rudi0504]

My Fostex TH 900 with Ko Jo KM - 01

Source : AK 120
Dac : IBasso DB2
Amp : Ko Jo KM - 01
Headphone : Fostex TH 900
Cable : Venture Craft Audiophile grade mini to mini

Sound Quality :
High end SQ for night time listening. At home

 

[rudi0504]

It is too bad that I have sold the ak120 because I love the look of this amp. Thanks for all the pics Rudi

You are welcome Michael

AK 120 > iBasso DB2 > Ko Jo KM - 01 + any items / UM 3 DD = high end sound quality

 

[Mimouille]

Yes but also 901 with balanced card with any iem : super sound

 

[rudi0504]

Yes but also 901 with balanced card with any iem : super sound

I wish that I can hear HM 901 at our local dealer around 20 September
With balance amp cost very expensive around 1200 Usd

 

[zachchen1996]

I wish that I can hear HM 901 at our local dealer around 20 September
With balance amp cost very expensive around 1200 Usd

Still better than the $1300 U.S. people have to pay!

 

[rudi0504]

Still better than the $1300 U.S. people have to pay!

Since our currency weak again USD , all audio gear price are expensive