Author Topic: Passive Pre-amp  (Read 6550 times)

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Offline Weng!

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Passive Pre-amp
« on: May 25, 2006 at 06:00 AM »
dunno if this topic had been discussed before.



can a 50k ALPS pot be used in replace of the step attenuator?

if the output will be split in 2 to feed 2 t-amps, will there be a power degradation or disadvantage perhaps?

TIA sa mga replies ;)

Offline ATJr.

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Re: Passive Pre-amp
« Reply #1 on: May 25, 2006 at 10:42 AM »
yes, please do...walang problema yan... ;D
That's OK, you can like or dislike anything you choose. That's the wonderful thing about the freedom

Offline Weng!

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Re: Passive Pre-amp
« Reply #2 on: May 25, 2006 at 10:51 AM »
yes, please do...walang problema yan... ;D

thanks sir tony. i will definitely try this on my t-amps. at least isa nalang ang knob na pipihitin ko to control the volume of both amps at the same time.

Offline reyrey

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Re: Passive Pre-amp
« Reply #3 on: Sep 09, 2006 at 10:03 PM »
What potentiometer used in your passive control unit?

Offline Weng!

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Re: Passive Pre-amp
« Reply #4 on: Sep 10, 2006 at 02:18 AM »
What potentiometer used in your passive control unit?

i have a 50k ALPS pot but never had the chance to try the above config as i am using a tono pre-amp now.

Offline reyrey

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Re: Passive Pre-amp
« Reply #5 on: Sep 10, 2006 at 09:45 AM »
thanks for your reply

can i know where i can buy A STEPPED ATTENUATOR (ANY BRAND)
currently, im using a DIY PASSIVE CONTROL with ordinary pot (100K)
« Last Edit: Sep 10, 2006 at 09:57 AM by reyrey »

Offline B-COL

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Re: Passive Pre-amp
« Reply #6 on: Jan 14, 2007 at 09:26 AM »
STEREO IT IS

Offline oweidah

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Re: Passive Pre-amp
« Reply #7 on: May 17, 2007 at 11:57 PM »
In some cases its worth trying passive preamp first (ex. alps blue) before embarking on active preamps (tube or ss).

there's not much difference daw in sound quality.

any comments, experiences regarding this? tnx

Offline dana

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Re: Passive Pre-amp
« Reply #8 on: May 18, 2007 at 09:11 AM »

Offline iceman90a

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Re: Passive Pre-amp
« Reply #9 on: May 18, 2007 at 09:29 AM »
i've been using a passive preamp for a long time now. maybe i've gotten so used to the sound that i'm having a hard time in finding a tube preamp to replace it
money is best spent

Offline ATJr.

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Re: Passive Pre-amp
« Reply #10 on: May 18, 2007 at 09:43 AM »
if you want to build one >>>http://users.ece.gatech.edu/~mleach/papers/stepatten/stepatten.pdf

and if you want to buy 22step switch you can email "coffin", lin li-chun, at diy audio....
That's OK, you can like or dislike anything you choose. That's the wonderful thing about the freedom

Offline rascal101

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Re: Passive Pre-amp
« Reply #11 on: May 18, 2007 at 09:47 AM »
Previously designed a passive pre-amp but not resistor or transformer based. Currently in use by me and a couple of other people.

Offline dana

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Re: Passive Pre-amp
« Reply #12 on: May 18, 2007 at 11:37 AM »
Previously designed a passive pre-amp but not resistor or transformer based. Currently in use by me and a couple of other people.

yan ba ung dinala mo sa haus na swiss army passive pre-amp ang dating (may mga modules?)
hindi yata kami kasama sa beta recipents,kelan yung sa min? :D
« Last Edit: May 18, 2007 at 11:39 AM by dana »

Offline rascal101

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Re: Passive Pre-amp
« Reply #13 on: May 18, 2007 at 11:41 AM »
Nadisgrasya ako ni Jumong eh tapos recently na sprain iyung isang daliri ko sa swimming pool. Kaya nga, pahinga muna ako. Next week simulan ko uli mag kumpuni. Not for sale pero pwede for swap. Puwede na sa akin iyung bagong tube pre-amp ... hehehe ... biro lang.
« Last Edit: May 18, 2007 at 11:42 AM by rascal101 »

Offline dana

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Re: Passive Pre-amp
« Reply #14 on: May 18, 2007 at 12:17 PM »
 ;D ;D ;D

Offline oweidah

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Re: Passive Pre-amp
« Reply #15 on: May 18, 2007 at 01:25 PM »
thanks for the inputs sirs.

sana may makapag post impressions, feedbacks on comparison between a passive preamp vs. active preamp.


Offline RU9

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Re: Passive Pre-amp
« Reply #16 on: May 18, 2007 at 02:18 PM »
sana may makapag post impressions, feedbacks on comparison between a passive preamp vs. active preamp.

Let me try. First time I heard one, I can describe the sound as "raw".
Neutral in audiophile lingo according to FLD. It gives me the impression that what I hear is the recorded material, no additional contribution from the audio gear. It is dynamic without the additional punch of an active preamp. 

 

Offline ATJr.

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Re: Passive Pre-amp
« Reply #17 on: May 21, 2007 at 03:18 AM »
thanks for the inputs sirs.

sana may makapag post impressions, feedbacks on comparison between a passive preamp vs. active preamp.



there is really no comparison as you will be comparing apples to oranges....a passive preamp is there just to assist you change volume levels...it is not supposed to change anything but the volume levels... ;D
That's OK, you can like or dislike anything you choose. That's the wonderful thing about the freedom

Offline accastil

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Re: Passive Pre-amp
« Reply #18 on: May 21, 2007 at 06:40 PM »
mga bro, where can i find a diy, passive pre for sale....with good quality parts of course :).
im allan - 09178087173