PHASS High End Hybrid Tube amplifiers *Amp Doctor* - Car Audio | DiyMobileAudio.com | Car Stereo Forum

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Old 08-29-2017   #1
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Default PHASS High End Hybrid Tube amplifiers *Amp Doctor*

(2) PHASS Hybrid Tube Amps.
TP 4.100
TP 2.150

Both were sent to Gordon Taylor at Amp Doctor and received full Gold Package upgrades.

input caps Upgrade to Low ESR 4700uF types

Rail caps: Upgrade from 2200uF to 4700uF x 6 - better midbass 'weight'

Input chips: OP275 x 2 upgrade to LME49720, uPC4072 x 2 to LME49880

Drivers to be upgraded and mounted to heatsink. Bias sensor moved to contact output devices.

Bias adjusters fitted and bias optimised using analyser.

Re x 8 reduced to 0r15 5WS so amp makes rated power into 2 ohms.

Modifications costs for both amps $450 including shipping and VAT

these are amazing sounding amplifiers.
As with any Class A or similar designed amp, these will run hot.

Amps were used for past few months in my competition car.

being a Sound Quality competitor, I need to change to something with better support for competitors.

my loss is your gain.

*also comes with the original tubes and some extra tubes


$1000ea shipped CONUS

$1900 Shipped Package deal


need to sell ASAP









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Old 08-29-2017   #2
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Default Re: PHASS High End Hybrid Tube amplifiers *Amp Doctor*

Wow, those are some beautifully designed amps.


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Old 08-29-2017   #3
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Default Re: PHASS High End Hybrid Tube amplifiers *Amp Doctor*

I saw these on Sunday. They are just as nice in person.

NCSQ
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Old 08-29-2017   #4
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Default Re: PHASS High End Hybrid Tube amplifiers *Amp Doctor*

WOWZERS.. Those are pretty....

I wonder how many of these were produced?? Can't be many...

There is not much info on these online, at least in english.(translating didn't do much better)

Do these utilize Tubes in the output section or are they tube preamp only?

Seeing the word Hybrid leads me to believe they are tube pre-amp w/more conventional power amplifier section..

I'd rather have a bottle in front of me than a frontal lobotomy!

Last edited by felix509; 08-29-2017 at 01:56 PM..
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Old 08-29-2017   #5
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Default Re: PHASS High End Hybrid Tube amplifiers *Amp Doctor*

Quote:
Originally Posted by felix509 View Post
WOWZERS.. Those are pretty....

I wonder how many of these were produced?? Can't be many...

There is not much info on these online, at least in english.(translating didn't do much better)

Do these utilize Tubes in the output section or are they tube preamp only?

Seeing the word Hybrid leads me to believe they are tube pre-amp w/more conventional power amplifier section..
You're correct, they only have tube pre-amps.

https://phass.sharepoint.com/Pages/A...mplifiers.aspx

“The bitterness of poor quality remains long after the sweetness of low price is forgotten.” – Benjamin Franklin
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Old 08-29-2017   #6
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Default Re: PHASS High End Hybrid Tube amplifiers *Amp Doctor*

Quote:
Originally Posted by felix509 View Post
WOWZERS.. Those are pretty....

I wonder how many of these were produced?? Can't be many...

There is not much info on these online, at least in english.(translating didn't do much better)

Do these utilize Tubes in the output section or are they tube preamp only?

Seeing the word Hybrid leads me to believe they are tube pre-amp w/more conventional power amplifier section..
They are in the preamp section. But the tubes do add a nice warmth to the overall sound. Class A bias makes them great with overall detail and clarity.

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Old 08-30-2017   #7
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Default Re: PHASS High End Hybrid Tube amplifiers *Amp Doctor*

Quote:
Originally Posted by Mic10is View Post
They are in the preamp section. But the tubes do add a nice warmth to the overall sound. Class A bias makes them great with overall detail and clarity.
I'm sure, and would grab these if I had the funds. GLWS!

“The bitterness of poor quality remains long after the sweetness of low price is forgotten.” – Benjamin Franklin
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Old 08-30-2017   #8
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Default Re: PHASS High End Hybrid Tube amplifiers *Amp Doctor*

Goodness!!!


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Old 08-30-2017   #9
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Default Re: PHASS High End Hybrid Tube amplifiers *Amp Doctor*

OMG, Look at the Signal to Noise Ratios - 112.5 & 110.3 !!!!!!!!!!!!!! These puppies must Rock.
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Old 08-31-2017   #10
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Default Re: PHASS High End Hybrid Tube amplifiers *Amp Doctor*

These are beautiful. Sad to see them leaving your car Mic but I'm sure you have something cool up your sleeve as usual. Glad I got to hear them in the Acura before they make their way to a new owner. Someone is going to be VERY happy with these.

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Old 08-31-2017   #11
 
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Default Re: PHASS High End Hybrid Tube amplifiers *Amp Doctor*

Mic I have no idea what's going on with my MPs, I assure you they were not empty but it seems all buggy
So I’d take the 4ch, let me know, if ok PM me your paypal thing or email to discuss (I can read yours at least)

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Old 09-02-2017   #12
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Weekend bump

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Old 09-03-2017   #13
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Default Re: PHASS High End Hybrid Tube amplifiers *Amp Doctor*

I have some interest but noone has paid yet. Would really like to sell as a pair, but will split up if I really have to

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Old 09-04-2017   #14
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Default Re: PHASS High End Hybrid Tube amplifiers *Amp Doctor*

sold pending payment

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