X150.5 Queries

kenny_(00)_ · 16th September 2009, 06:38 AM

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!

Nelson Pass · 16th September 2009, 07:37 PM

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.

kenny_(00)_ · 01:56 AM

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?

Nelson Pass · 17th September 2009, 02:53 AM

I think that's the same amount of capacitance as current
production, and you have the current high speed rectifiers.

kenny_(00)_ · 18th September 2009, 07:08 AM

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!

Stump · 19th October 2009, 06:10 AM

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

Melon Head · 19th October 2009, 07:47 AM

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

Nelson Pass · 19th October 2009, 10:45 PM

Quote:

Originally Posted by Stump

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 $.

Stump · 20th October 2009, 09:34 AM

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.

Nelson Pass · 20th October 2009, 03:19 PM

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?

16th September 2009, 06:38 AM	#1
kenny_(00)_ diyAudio Member Join Date: May 2003 Location: Singapore	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!

17th September 2009, 01:54 AM	#3
kenny_(00)_ diyAudio Member Join Date: May 2003 Location: Singapore	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? Last edited by kenny_(00)_; 17th September 2009 at 01:56 AM.

19th October 2009, 07:47 AM	#7
Melon Head Formerly Thanh1973 Join Date: Nov 2006	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 __________________ "No, this sucker's electrical, but I need a nuclear reaction to generate the 1.21 gigawatts of electricity I need."

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16th September 2009, 07:37 PM	#2
Nelson Pass The one and only Join Date: Mar 2001	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.

17th September 2009, 02:53 AM	#4
Nelson Pass The one and only Join Date: Mar 2001	I think that's the same amount of capacitance as current production, and you have the current high speed rectifiers.

18th September 2009, 07:08 AM	#5
kenny_(00)_ diyAudio Member Join Date: May 2003 Location: Singapore	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!

19th October 2009, 06:10 AM	#6
Stump diyAudio Member Join Date: Oct 2009	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

20th October 2009, 09:34 AM	#9
Stump diyAudio Member Join Date: Oct 2009	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.

20th October 2009, 03:19 PM	#10
Nelson Pass The one and only Join Date: Mar 2001	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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