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Old 16th September 2009, 06:38 AM   #1
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Default X150.5 Queries

Hi, I've been a Pass fan for a long time and recently just bought a X150.5. I have a few questions to ask about this amp which I believe have not been answered before (as compared to X150):

1. The number of Mosfets has been reduced to 12 from 20, what is the consequence of this? (current, sound?)
2. There is a input coupling capacitor now where X150 was DC coupled. Why?
3. The capacitors have been reduced in size.

Will any knowledgeable guys help give some input. It is sounding good, but is keeping me from sleep to think that I paid more for the new version that seems like cost cutting apart from that nice meter!
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Old 16th September 2009, 07:37 PM   #2
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That's how we made them in 2002. Current production is
beefed up with regard to power supply and output stage,
although we still have the input capacitors.

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Old 17th September 2009, 01:54 AM   #3
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Thanks Mr Pass for your valuable input. I do own your Aleph & First Watt amps too & love them! I should have posted a pic earlier for clarity, though I'm not sure which version my amp falls under. But here is what it looks like. Any more guys care to comment too?
Click the image to open in full size.

Last edited by kenny_(00)_; 17th September 2009 at 01:56 AM.
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Old 17th September 2009, 02:53 AM   #4
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I think that's the same amount of capacitance as current
production, and you have the current high speed rectifiers.

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Old 18th September 2009, 07:08 AM   #5
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Thank you Mr Pass, I can sleep well now Having owned other brand stuff before, I was always taken in circles without actually answering my queries. I wish other manufacturers would be as forthcoming as you!
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Old 19th October 2009, 06:10 AM   #6
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That is interesting.I am in Australia and we use 240V power.The price of the Pass Lab X150.5 is $10,000. I believe in the USA its $5500. As we don't have a Pass Lab dealer in Adelaide I rung Sydney and was told the 240V version is totally different to the USA model. He then told me they sound the same????At the price I would expect it would sound twice as good....
How different can the same product be with internal parts? Thanks
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Old 19th October 2009, 07:47 AM   #7
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Different transformer, slightly different soft start. It really shouldn't be that different.
If it is an amp that is in stock then the distributer may have purchased it when the Aussie dollar was low, then when you factor in the cost of shipping, $10,000 is not over the top.
However based on todays Aussie dollar $10,000 is a lot
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Old 19th October 2009, 10:45 PM   #8
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Quote:
Originally Posted by Stump View Post
That is interesting.I am in Australia and we use 240V power.The price of the Pass Lab X150.5 is $10,000. I believe in the USA its $5500.
If you apply the ordinary markups, and factor in the shipping
and high VAT, that comes out about right, particularly if you
are quoting Australian $.

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Old 20th October 2009, 09:34 AM   #9
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Thanks for your reply Nelson.
Should be $ for $ soon.Even with shipping
and Tax, at 30% dearer then the USA it makes it hard for
Pass Labs to compete in the Australian market with other Amps.
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Old 20th October 2009, 03:19 PM   #10
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Look at it this way - our products do not tend to be the
most expensive in general. The M company and the K
company and several others charge quite a bit more.

Which one do you want?

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