Posted on Saturday, 2nd January 2010 by Auw Jimmy

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A pair of Duelund CAST is enough to rob your wallet. How about two pairs? Well, sometime money is not an object – when you are pursuing the ultimate sound. No sky is high enough ;)

I welcome, two pairs of Duelund CAST Capacitor installed on 6J5-RE604-RS241 Amplifier. The installation process was done just before end of last year (31th December 2009, night!). And well, I saw many fireworks when driving home (around 00:15). Happy New Year first!

dual-duelund_1

The internal wiring has been upgraded with some Duelund Hook-Up Wire (various size of 0.5/1.0/2.0). To be honest, this is definitely an ultimate amplifier with ultimate parts inside. I have heard this system several times, and after this last few modification, the result was awesome.

dual-duelund_internal

Before, we tried the 1 uF CAST on the position between driver-final tube, while between the input and driver tube we used the 0.47 uF CAST. What we got was a quite disappointed result! The bass lost its definition and control. The mid was so dominant, but the high lost its naturality. We lost most of the “what we called” a microdetails.

Then we exchanged the 1 uF CAST to the front (input and driver tube) and 0.47 uF CAST to the back (drive and final tube). The result was amazing. The high was so extend and sweet. The mid was no longer dominant, but overall the tonal balance was superb. Bass control also on the level of our satisfactory, tight, rounded, and well controlled. Oh almost forgot, the microdetails of every instrument, like guitar, violin, and the sweet of Stacey Kent and Rebecca Pidgeon were impressive. The different between previous and latest setup (only exchanging the 1 uF and 0.47 uF position) was so significant. Even we could judge just few second after the intro of Spanish Harlem (Rebecca Pidgeon). I believed this was not a placebo since we have tried to exchange the position few times to confirm our finding.

dual-duelund_2

Another shoot of this beautiful amplifier, powered with vintage, expensive, and perfectly sounding tubes. Oh also you could see 2 pairs of Duelund on the bottom of the plate. Sorry man, it seemed that you did really need a new chassis.

dual-duelund_3

The 2 pairs combo of this Duelund CAST did make a big improvement and enjoyment in listening music. We could hear an even “bowling alley” depth staging from this combination. Actually, 1 pair of Duelund CAST already made a lot of improvement, but we never guessed that 2 pairs could make the different even more significant. So, when we can stop? >.<

I have ordered a pair of CAST Silver, which cost almost 3 times of the CAST Copper used in this entry. We’ll see in next two months whether I have made a right decision or not ;)



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Posted in DIY Audio | Comments (21)

21 Responses to “Dual Pairs of Duelund CAST Capacitors!”

  1. Arie Says:
    January 4th, 2010 at 16:19

    Sooo speechless Pak Jim…
    Sangat2 menarik :D
    Thanks for the review..

    Keep “crazy” !! :D

    salam,
    Arie



  2. Jimmy Auw Says:
    January 4th, 2010 at 22:51

    Crazy forever Pak he he he…



  3. Roy Says:
    January 7th, 2010 at 16:50

    Ada yang terjerumus dalam lembah kegelapan kayaknya :p



  4. Jimmy Auw Says:
    January 7th, 2010 at 18:20

    oh enggak, just completely audio nirvana…



  5. gunawan Says:
    January 13th, 2010 at 22:23

    boleh tau, pak. apa beda suara duelund kabel yg 0.5; 1.0 dan 2.0. apa cuma beda ukurannya aja? thx



  6. Jimmy Auw Says:
    January 14th, 2010 at 00:38

    susah dijelaskan dengan kata-kata Pak.
    Versi 0.5 ke 1.0 bedanya jauh banget, kalo 1.0 dan 2.0 agak relatif, tergantung matching system juga.
    Thanks.



  7. gunawan Says:
    January 14th, 2010 at 11:16

    wuihh, racun nih…
    thx infonya, pak



  8. gunawan Says:
    January 14th, 2010 at 19:28

    kalo lg pesen duelund, boleh nebeng order, pak? thx



  9. Jimmy Auw Says:
    January 14th, 2010 at 20:32

    Ini saya lagi pesen CAST Silver untuk gantikan CAST Copper saya yang lama.
    Tapi masih sekitar Maret baru jadi karena harus indent sekitar 2 bulan.

    Thanks.



  10. gunawan Says:
    January 14th, 2010 at 23:24

    bole tambahin orderan? mau pesen kabel yg 1.0.
    CAST coppernya mau dibuang? sy yg buangin aja ya?:D thx



  11. Jimmy Auw Says:
    January 14th, 2010 at 23:28

    Kalo kabel hook-up wire (bukan RCA), silakan pesan langsung ke http://www.partsconnexion.com aja Pak.
    Lebih cepat toh ongkos kirim juga murah kalo cuman kabel doank mah. Mereka ready stock koq. Kelamaan kalo nunggu saya mah.

    CAST Copper-nya sudah keburu diambil orang dan pas kebetulan saya mau ambil yang CAST Silver juga.

    Thanks.



  12. gunawan Says:
    January 14th, 2010 at 23:33

    oke, thx for info.
    kalo bole tau, hrg 2nd cap. itu kira2 brp % dr yg baru? hx



  13. Jimmy Auw Says:
    January 14th, 2010 at 23:40

    Lebih mahal yang seken Pak hehehe. At least sama dengan yang baru.

    Alasannya:
    - Kalo beli baru mesti nunggu at least 2 bulan (indent time, karena tidak ada yang ready stock dan belum termasuk shipping time antara 2-3 minggu)
    - Kalo beli baru mesti nunggu break-in lagi (at least 200 jam, kalo tiap hari ON selama 3 jam, itu equal dengan 2 bulan break-in time)
    - Kalo beli baru otomatis ga bisa nyoba dulu (kalo beli seken ada chance nyoba dulu cocok atau gak di system kita)

    So, kalo beli baru minimal Anda harus nunggu 3-5 bulan sebelum bisa menikmati kualitas aslinya. Bersediakah menunggu selama itu?

    Thanks.



  14. gunawan Says:
    January 15th, 2010 at 00:15

    ha..ha… alasan yg bagus!!!
    btw, sy ada speaker made in babe Har, mid scans 18w4531 tw scans 9900. mimpinya sih xo pake duelund. kalo ada waktu, bersediakah pak Jim audisi layak tidakna pk duelund? thx berat!



  15. Jimmy Auw Says:
    January 15th, 2010 at 00:20

    Speaker buatan Babe Har yang pernah saya dengar kualitasnya OK dan di atas rata2.
    Tapi kalo mau dipakaikan Duelund saya ga berani komentar he he he. Soalnya mahal he he he. Kalo salah ngasih saran, berat konsekuensinya.
    Kalo sekedar audisi OK lah, tapi saya ga berani nyarankan bagusnya pake caps apa ya.

    Thanks.



  16. gunawan Says:
    January 15th, 2010 at 00:28

    ha..ha.. itu dia!! gr2 MAHAL makanya gak berani gegabah…
    nanti kita janjian aja yah. thx



  17. Jimmy Auw Says:
    January 15th, 2010 at 00:29

    OK.



  18. Dan Haines Says:
    February 5th, 2010 at 13:56

    Did I understand correctly, that you got your best result using 1.0uf at input/driver location and .47uF as interstage coupler between tubes, or output coupler? Thanks



  19. Jimmy Auw Says:
    February 6th, 2010 at 15:24

    0.47 between the driver and final tube.
    Thanks.



  20. Anonymous Says:
    May 29th, 2010 at 11:51

    KAPASITORNYA NGERI PAK..
    ini caps buat di pre amp ato di power amp nya pak??
    utk menangani bagian apa ya pak caps ini?
    thank u



  21. Jimmy Auw Says:
    May 29th, 2010 at 21:18

    Hi,
    Namanya capacitor ya mau mahal murah fungsinya sama aja bro.
    Bisa di preamp, bisa di amp.

    Thank.



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