Has anyone ever modified a X250.5? - diyAudio
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Old 12th March 2008, 03:59 PM   #1
mert is offline mert  Turkey
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Question Has anyone ever modified a X250.5?

if there is a possibility, what internal parts could be modified? and how?
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Old 12th March 2008, 05:23 PM   #2
MikeW is offline MikeW  United States
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For what purpose?
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Old 12th March 2008, 05:39 PM   #3
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Quote:
Originally posted by MikeW
For what purpose?
To make it lighter?
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Old 12th March 2008, 08:15 PM   #4
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Reducing the weight of the amp makes the sound lighter, just as relieving tension in the cables by removing the zip ties makes the sound more relaxed.
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Old 12th March 2008, 10:01 PM   #5
mert is offline mert  Turkey
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Quote:
Originally posted by MikeW
For what purpose?

Quote:
Originally posted by analog_sa


To make it lighter?

Quote:
Originally posted by b-square
Reducing the weight of the amp makes the sound lighter, just as relieving tension in the cables by removing the zip ties makes the sound more relaxed.
What about internal upgradable parts? maybe changing internal wires?
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Old 12th March 2008, 10:14 PM   #6
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reducing weight? this is not sport car like zonda , this is more like freightliner truck in car world
and I think there can be changed few parts to achieve better sound-

1)transformer- to tribute audio custom with internal shield
2)diodes- to newest ,fastest
3)resitors- to audiophyle types with low noise, inductance, and discortion (caddock mk132,mp 930/850, dale, etc)
4)power suply capacitors to siemens/epcos sikorel 125/105 series
5)shunt power supply with silver oil foil capacitors
6)replace panasonic caps to black gate n/nx


also extra folowing modifications can be done with some minor improvvements(audible or just phycological-depends on your setup ant personality )

7)replace xlr and/or rca wires to audiophile types(kimber kcag for example) to sockets from pcb
8)replace all power supply wires to kimber 8tc for example or some monocrystal wires.
9) replace power, rca and xlr socket to better quality(speaker terminals for my opinion is very good)




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Old 12th March 2008, 11:07 PM   #7
MikeW is offline MikeW  United States
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1)transformer- to tribute audio custom with internal shield
2)diodes- to newest ,fastest
3)resitors- to audiophyle types with low noise, inductance, and discortion (caddock mk132,mp 930/850, dale, etc)
4)power suply capacitors to siemens/epcos sikorel 125/105 series
5)shunt power supply with silver oil foil capacitors
6)replace panasonic caps to black gate n/nx


minor improvvements(audible or just phycological-depends on your setup ant personality )

7)replace xlr and/or rca wires to audiophile types(kimber kcag for example) to sockets from pcb
8)replace all power supply wires to kimber 8tc for example or some monocrystal wires.
9) replace power, rca and xlr socket to better quality(speaker terminals for my opinion is very good)


There are high quality parts in this unit. Sit back and enjoy it. If you want to $#%# around with an amp build a DIY AX.

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Old 12th March 2008, 11:57 PM   #8
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Not having a schematic or actual unit in front of me, I'd be reduced to guessing. The only...and I mean only thing I would consider is if the unit uses Panasonic metallized polyester coupling caps (very likely 10uF 100V, brown in color) at the input, then you might think about either bypassing them with a polystyrene cap or replacing them with another good film cap. I have not done a scorched earth comparison of all the film caps on the market in quite some time, but I did a limited comparison between the Panasonic caps and a couple of others a few years ago. All I can say is that the Panasonic caps are okay in the bass, but get less impressive as you go up in frequency. For a modestly-priced film cap, I recommend WIMA polypropylene. The best film caps I have worked with--though expensive--are the MIT RTX polystyrene. MIT is also known to some as Rel Cap (Reliable Capacitor).
I know of few people who have actually gone to the trouble to buy samples of a wide variety of caps and compare them. As a result, you tend to get a lot of people telling you that they like Brand X. If you ask them what they compared Brand X to, they start mumbling and making excuses to the extent that 'everybody knows that Brand X is the best.' I've already given my disclaimer, though you'll find MIT/Rel Cap parts in a lot of high end gear. Of course, you can find Hovland, and any number of other brands as well. If you have a favorite film cap, feel free to try that.
If the amp doesn't use coupling caps, I withdraw my suggestion, but I seem to recall Nelson saying that there were caps at the input.
If your amp is under warranty it would be wise to see what Pass Labs' policy is regarding modifications to their equipment before warming up your soldering iron. There was another thread here just within the last week or so wherein (if I understood correctly) someone modified a Pass Labs amp. Nelson's comments in that thread sounded pretty grim to me. Don't say you weren't warned.

Grey
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Old 13th March 2008, 12:34 AM   #9
TerryO is offline TerryO  United States
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Quote:
Originally posted by mert
What about internal upgradable parts? maybe changing internal wires?

Mert,
What exactly do you dislike about the amp as it is? If you could discribe the aspects of what you're hearing that you'd like to change, it would be helpful. Also, it would help to know what is the source and what speakers you're using.

One other IMPORTANT thing, if you haven't Acoustically Treated your listening room you should do that first. I personally wouldn't do another thing until that's done, otherwise you'll be wasting your time and wouldn't be able to tell if any real improvements have occurred after the equipment mods.

Best Regards,
TerryO
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Old 13th March 2008, 12:36 AM   #10
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