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Old 10th November 2012, 02:24 PM   #1
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Default KingRex T20 or T20 modifications

Hi Everyone,
I was over at AS and saw a post about someone wanting to know if anyone had modified a KingRex T20U or T20 amplifier?

Hm, I'd like to know the answer myself.

Have you modified one and if so, what did you do and what kind of results did you obtain?

Thanks kindly!

Last edited by jazzminded; 13th November 2012 at 02:56 PM.
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Old 15th November 2012, 05:52 PM   #2
t-head is offline t-head  United States
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What did you have in mind?...I have modded a few...for AudioMagus before their demise.
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Old 16th November 2012, 08:02 AM   #3
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Quote:
Originally Posted by t-head View Post
What did you have in mind?...I have modded a few...for AudioMagus before their demise.
Hi t-head,
Thanks for your response, it is much appreciated.

I'm really interested in taking the KingRex to the max, if that can be done.

I saw an article where someone changed the coupling capacitors to teflon from the original polypropylene removed the ferrite beads on the wires leading to the banana jacks.

Other than that I have never seen anything else, so I guess what I'm really asking is, what else can I do to upgrade the amp.

What was the most usual change that you made to these amps?

Thanks very kindly!
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Old 16th November 2012, 05:26 PM   #4
t-head is offline t-head  United States
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jazzminded,

We changed the input capacitors to 2.2 uf Auricaps, changed power 'tank' caps to large panasonics. I have also changed the output coils to aircoils from Italy(autocostrire?) and arjen helders. The input caps and the tanks showed the most obvious improvements. The output coils somewhat less obvious but an improvement. There are many threads on TA2020 mods...Cap choice is personal and runs from fairly cheap to more than the amp costs...YMMV. Ease of mods depends on your experience...demands a steady hand and a pure heart ...hope this helps.

Richard
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Last edited by t-head; 16th November 2012 at 05:38 PM.
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Old 16th November 2012, 05:34 PM   #5
t-head is offline t-head  United States
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Tripath Input Coupling Caps
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Old 16th November 2012, 07:01 PM   #6
chrisb is offline chrisb  Canada
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Richard:

I have a T20U and T20one that was modified by Audio Magus to have 2 RCA inputs and front panel selector, and upgraded the output terminals myself to standard 3/4" spacing 5-way binding posts. I also have the larger (non wall-wart) power supply.


There's not a lot of room in the very tidy layout of this design to upgrade to boutique parts, but I am interested in the output coils - can you point me in the direction to find those, or to the mod threads mentioned?

thanx
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Old 16th November 2012, 08:21 PM   #7
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Quote:
Originally Posted by chrisb View Post
Richard:

I have a T20U and T20one that was modified by Audio Magus to have 2 RCA inputs and front panel selector, and upgraded the output terminals myself to standard 3/4" spacing 5-way binding posts. I also have the larger (non wall-wart) power supply.


There's not a lot of room in the very tidy layout of this design to upgrade to boutique parts, but I am interested in the output coils - can you point me in the direction to find those, or to the mod threads mentioned?

thanx
Autocostruire - made in italy audio tools
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Old 16th November 2012, 09:32 PM   #8
t-head is offline t-head  United States
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Crisby,

I used these: Autocostruire - made in italy audio tools I settled on these for a slightly more 'smooth' presentation

and these: 4 Pcs Choke Coil for Class D Amplifiers 10uH 3A | eBay

I also used air-core coils from Mardis-versions of the Trends 2024 amp

Input Caps were Auricaps for the AudioMagus mods. Choke or Inductor coils were my own mod

I did many mods of the type you mentioned but stuck to the more strickly audio-related mods for this thread...as for mod threads try search feature...

by the by, how are you and dave doin' up in BC?
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Last edited by t-head; 16th November 2012 at 09:35 PM.
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Old 16th November 2012, 09:38 PM   #9
t-head is offline t-head  United States
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jazzminded,

A 'quiet', ripple-free Power Supply is key to best sound IMHO...good luck, I enjoyed my KingRex for many years until I 'lost' them...long story.
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Old 16th November 2012, 10:01 PM   #10
chrisb is offline chrisb  Canada
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Quote:
Originally Posted by t-head View Post
Crisby,

I used these: Autocostruire - made in italy audio tools I settled on these for a slightly more 'smooth' presentation

and these: 4 Pcs Choke Coil for Class D Amplifiers 10uH 3A | eBay

I also used air-core coils from Mardis-versions of the Trends 2024 amp

Input Caps were Auricaps for the AudioMagus mods. Choke or Inductor coils were my own mod

I did many mods of the type you mentioned but stuck to the more strickly audio-related mods for this thread...as for mod threads try search feature...

by the by, how are you and dave doin' up in BC?
thanks Richard

visit the FR and P10 commercial forum for the updates


edit: Key Largo? bit of a change from the great north wet (now the truly everGREEN state - but for how long?) I guess we'll need a Cheech Marin emoticon



One more question - do you foresee any risk to removing the ferrite beads at speaker jacks as JM mentioned? I did that several years ago on my other T20 (U), which has since died, I hope for other reasons. It might well have been autosuggestion, but I thought it made a slight improvement at the time.
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Last edited by chrisb; 16th November 2012 at 10:15 PM.
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