Author Topic: AMX Tube Products  (Read 718140 times)

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Offline geko

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Re:AMX Integrated Tube Amp
« Reply #510 on: Mar 04, 2004 at 07:01 PM »
di naman 99k yung presyo ngayon e mas mababa na hehe ;)



uyyy....  share naman kung magkano...   ;D
just an ordinary music enthusiast.

Offline kimpao

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Re:AMX Integrated Tube Amp
« Reply #511 on: Mar 05, 2004 at 01:00 AM »
kasali ako under "soon" alisin lang muna yung "very", magiipon pa kasi.  ;D

leaning towards the single-ended 6550 on display, since it's flexible & affordable... switchable to triode, pentode & ultralinear... chromed yata faceplate nun type ko ang itsura... pwede for the price.


Aha! hindi lang pala kaming apat ang nagmumuni-muni diyan. Lima pala tayo pero si kuya hans medyo may alam na kung ano ang aking binabalak. Mweheheheheheh ;D

Offline H a n $

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Re:AMX Integrated Tube Amp
« Reply #512 on: Mar 05, 2004 at 08:54 AM »
Kimpao,

Para kayong Go Go Power rangers!! hehehe alam ko na type mo let me guest??.... secret muna.

Offline john5479

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Re:AMX Integrated Tube Amp
« Reply #513 on: Mar 05, 2004 at 09:08 AM »
secrets...mabibisto din yan ::)

Offline sebman

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Re:AMX Integrated Tube Amp
« Reply #514 on: Mar 05, 2004 at 09:09 AM »
mga repapeeppsss..according to hans.. mr. sevilla is designing an amp based on the 6550 with a 20-25 watts power.. suggestion is to wait for it... hoping the price is as reasonable as the 6550..  ;D

Offline john5479

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Re:AMX Integrated Tube Amp
« Reply #515 on: Mar 05, 2004 at 09:11 AM »
ahhh if sure order yung 4 (or5? ::)) siguro baka me discount hehe ;D

Offline sebman

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Re:AMX Integrated Tube Amp
« Reply #516 on: Mar 05, 2004 at 09:19 AM »
ahhh if sure order yung 4 (or5? ::)) siguro baka me discount hehe ;D

pwede sir.. group buy yun..  ;D  :D

Offline Vrion

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Re:AMX Integrated Tube Amp
« Reply #517 on: Mar 05, 2004 at 09:32 AM »
kasali ako under "soon" alisin lang muna yung "very", magiipon pa kasi.  ;D

leaning towards the single-ended 6550 on display, since it's flexible & affordable... switchable to triode, pentode & ultralinear... chromed yata faceplate nun type ko ang itsura... pwede for the price.


I have seen this, kaya lang wasnt able to listen to it. Ano ba difference if you config it to triode, pentode or ultralinear? (sensya na, di marunong eh..)

Yung 300B nya, me nakapagtry na ba?

Offline H a n $

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Re:AMX Integrated Tube Amp
« Reply #518 on: Mar 05, 2004 at 09:56 AM »
Sebman,

Correct ka dyan sir.. kaya wait lang kayo :) mas ok ang group buy.

Vrion,

Yun selection na triode, ultralinear, and Penthode mode for fexibility yan on kind of music you like to hear I think for dynamic and punch penthode ok for mellow and vocals songs triode/ultralinear naman.. but no sure though. :)

Offline john5479

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Re:AMX Integrated Tube Amp
« Reply #519 on: Mar 05, 2004 at 10:54 AM »
haven't tried the 300b but they're single ended tube amps sound quite good, paired with the right speakers of course
« Last Edit: Mar 05, 2004 at 10:55 AM by john5479 »

Offline j_albert22

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Re:AMX Integrated Tube Amp
« Reply #520 on: Mar 05, 2004 at 12:18 PM »

Yun selection na triode, ultralinear, and Penthode mode for fexibility yan on kind of music you like to hear I think for dynamic and punch penthode ok for mellow and vocals songs triode/ultralinear naman.. but no sure though. :)

also give more power

Offline akyatbundok

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Re:AMX Integrated Tube Amp
« Reply #521 on: Mar 05, 2004 at 01:02 PM »
pansin ko sa specs ng Jolida tube amps ang circuit ay palaging "ultralinear, class AB".

Jolida JD 502B - EL34/6CA7 tubes

Jolida JD 302B - 6550/KT88 tubes

kayang-kaya siguro ni master andrew gumawa ng ganito... pero magkano?
« Last Edit: Mar 05, 2004 at 01:04 PM by akyatbundok »

Offline kimpao

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Re:AMX Integrated Tube Amp
« Reply #522 on: Mar 05, 2004 at 01:04 PM »
pansin ko sa specs ng Jolida tube amps ang circuit ay palaging "ultralinear class AB1".

Jolida JD 502B - EL34/6CA7 tubes

Jolida JD 302B - 6550/KT88 tubes

kayang-kaya siguro ni master andrew gumawa ng ganito... pero magkano?

sir akyat, kasin halaga daw niyan yung Marantz SR7300, Accuphase and Sansui. ;D ;D ;D ;D ;D

Offline j_albert22

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Re:AMX Integrated Tube Amp
« Reply #523 on: Mar 05, 2004 at 01:25 PM »
pansin ko sa specs ng Jolida tube amps ang circuit ay palaging "ultralinear, class AB".

Jolida JD 502B - EL34/6CA7 tubes

Jolida JD 302B - 6550/KT88 tubes

kayang-kaya siguro ni master andrew gumawa ng ganito... pero magkano?

siguro yon talaga ang best design sa lahat like 6550 ni sir adrew kahit lakasan ok ang tunog di sabog nandoon pa rin yong lambing kaya naguguluhan na koooooooooooo ;D ;D ;D

Offline akyatbundok

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Re:AMX Integrated Tube Amp
« Reply #524 on: Mar 05, 2004 at 01:33 PM »
di ba ang el34 tube nasa 1.2k at ang 6550/kt88 nasa 3k?  kung ganun mas mura kaya ang push-pull or parallel single-ended na el34 (ala dynaco st70) kaysa single-ended na 6550?

Offline Vrion

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Re:AMX Integrated Tube Amp
« Reply #525 on: Mar 05, 2004 at 02:31 PM »
Was able to talk to mr andrew last Thu yata, he explained that kaya daw mas clear ang SET kesa sa push pull eh walang division (input stage) and rejoining of signal sa output stage. Interested talaga ako sa SET... though haven't decided which one to get yet.

Kelan kayo bros punta dun, meet tayo para me kahuntahan ;D





Offline john5479

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Re:AMX Integrated Tube Amp
« Reply #526 on: Mar 05, 2004 at 05:20 PM »
di ba ang el34 tube nasa 1.2k at ang 6550/kt88 nasa 3k?  kung ganun mas mura kaya ang push-pull or parallel single-ended na el34 (ala dynaco st70) kaysa single-ended na 6550?

it depends on the design and parts cost.not using botique parts will reduce cost, but assuming the design of the circuit is good then it will still sound good. Personally if the amp uses reliable but not necessarily botique parts its no problem.

Offline kimpao

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Re:AMX Integrated Tube Amp
« Reply #527 on: Mar 05, 2004 at 06:00 PM »
pansin ko sa specs ng Jolida tube amps ang circuit ay palaging "ultralinear, class AB".

Jolida JD 502B - EL34/6CA7 tubes

Jolida JD 302B - 6550/KT88 tubes

kayang-kaya siguro ni master andrew gumawa ng ganito... pero magkano?

sir akyat, yung  JD 502B, 6550/KT88 power output. Tapos yung JD 302B, ay 6CA7/EL34 power output

 :)

Offline H a n $

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Re:AMX Integrated Tube Amp
« Reply #528 on: Mar 06, 2004 at 09:29 AM »
akyat,

Maganda spec nito sir.. pwede yan pa-customize kay Mr sevilla. :D

Offline geko

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Re:AMX Integrated Tube Amp
« Reply #529 on: Mar 08, 2004 at 08:31 AM »
sir hans,

share mo naman (via PM) kung magkano inabot n'ung pre-amp-cum-controller center na pinagawa mo kay Mr. Sevilla.  pa-lista na rin ng mga features/options na pinalagay mo.   :)

thanks.

geko
just an ordinary music enthusiast.

Offline H a n $

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Re:AMX Integrated Tube Amp
« Reply #530 on: Mar 08, 2004 at 09:09 AM »
Geko,

Sir you have PM.

Offline arnoldc

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Re:AMX Integrated Tube Amp
« Reply #531 on: Mar 08, 2004 at 10:20 AM »
folks,

in Class A operation, the tube conducts throughout the duration of the signal, and the entire signal is reproduced up to the output. this is also the most LINEAR. the primary disadvantage of a Class A amplifier is that it is inherently inefficient, and the tube is conducting all the time. Class A can be one tube, or more than one. when one tube is used, it is called "Single-Ended Class A"

when people started to seek for more power because of advertising (the numbers game), companies had to use another Class of operation, leading to Class AB.

in Class AB operation, the  tube conducts more than half, but less than half the input cycle. this is used in situation where more power is needed and faithful reproduction of the input IS NOT the primary requirement. since the tube conducts at ~ half input cycle, another tube needs to conduct for the other half,  hence two tubes are required, hence PUSH-PULL is mandatory for Class AB.

the key point in Class AB, is that each tube works on MORE than half of the signal. in contrast, in a Class B mode of operation each tube works on exactly half the signal. and in Class C, each tube works on LESS than half the signal, and is of little use for hi-fi audio design.

Class AB1 or AB2 is only applicable to tube amplifiers. AB1 means the tubes DOES NOT draw grid current, and AB2 means the tubes DOES draw grid current.

so, if you like faithful reproduction of the music, nothing and NOTHING, beats Class A - at the price of inefficiency.

if you're after more POWER and faithful reproduction is something you cannot discern or you don't care about, then Class AB is for you.

matter of factly, most of you go for power.

me, i have chosen my road. Class A and Single Ended Triodes.

cheers.

ps.

if you'd like to learn more about these, attend our tube 101 session this coming saturday.
« Last Edit: Mar 08, 2004 at 10:27 AM by arnoldc »

Offline arnoldc

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Re:AMX Integrated Tube Amp
« Reply #532 on: Mar 08, 2004 at 10:24 AM »
parallel single-ended na el34 (ala dynaco st70) kaysa single-ended na 6550?
ahem, dynaco st-70 is NOT parallel single ended (no way, jose), it IS push pull.

just setting the record straight :)

Offline H a n $

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Re:AMX Integrated Tube Amp
« Reply #533 on: Mar 08, 2004 at 10:28 AM »
arnoldc,

Thanks for the info kailangan namin yan sir.

Offline H a n $

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Re:AMX Integrated Tube Amp
« Reply #534 on: Mar 08, 2004 at 10:31 AM »
arnoldc,

Ano mas ok Class A o Class AB in terms of sound quality sir?

Offline john5479

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Re:AMX Integrated Tube Amp
« Reply #535 on: Mar 08, 2004 at 10:53 AM »
Class A offers the best sound  enough said :)

Offline arnoldc

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Re:AMX Integrated Tube Amp
« Reply #536 on: Mar 08, 2004 at 11:10 AM »
hans,

i realized my post might be too technical.

Class A does faithful reproduction of the music, while Class AB does not.

Class A is inherently inefficient, and low powered, Class AB is more efficient (not the most efficient though) and has more power.

Only you can make a decision which road to take. Power or faithful reproduction? Your call.

Offline Vrion

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Re:AMX Integrated Tube Amp
« Reply #537 on: Mar 08, 2004 at 11:38 AM »
hans,


Class A does faithful reproduction of the music, while Class AB does not.


Sir,


Does it mean if i use a not so good CDP/TT (or even a so-so record) on a Class AB, the resulting musical quality could be better compared when i used the same front end/record to a Class A amp?

The efficiency is all about power lang di ba?

thanks for your posts, they are really very informative. :) :)

 
« Last Edit: Mar 08, 2004 at 02:39 PM by Vrion »

Offline arnoldc

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Re:AMX Integrated Tube Amp
« Reply #538 on: Mar 08, 2004 at 12:01 PM »
vrion,

if you have a so-so source, you will have so-so output regardless of the topology. but, i would say that more of the so-so-ness will be revealed by the Class A amps.

in short, bad source = bad output.

however, a good source on a Class AB might have less detail, some may not be audible (extremely good circuit) but will be measureable when compared to a Class A circuit. do we hear measurements? some people actually do. you might.

i suggest you go make a comparison, let's say a 2A3 amp (naturally revealing) and any push pull amp. forget the POWER for the meantime, and don't use monitor audio speakers. they're not good for tubes, because their impedance over the frequency range is wild. i'll choose  Spendor S3/5 as a reference.

Quote
Was able to talk to mr andrew last Thu yata, he explained that kaya daw mas clear ang SET kesa sa push pull eh walang division (input stage) and rejoining of signal sa output stage.

Maybe Andrew over simplified, but what you posted is not entirely the whole story, as i have previously posted. in addition, the "division" you mentioned is technically known as phase-splitting. there are many differences in phase splitter designs. Phase splitting is mandatory in Class AB.
« Last Edit: Mar 08, 2004 at 12:12 PM by arnoldc »

Offline akyatbundok

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Re:AMX Integrated Tube Amp
« Reply #539 on: Mar 08, 2004 at 01:09 PM »
ahem, dynaco st-70 is NOT parallel single ended (no way, jose), it IS push pull.

just setting the record straight :)

ay sorry for the mistake, i should have moved the st70 parenthesis next to the word "push-pull".

does this mean that being push-pull or class AB, st70's don't sound as good as SET's ?

6550 SE it is!  ;D
« Last Edit: Mar 08, 2004 at 01:10 PM by akyatbundok »