[SlimDevices: Audiophiles] Re: Using a Naim Power Amp Without a PreAmp

2007-01-21 Thread cliveb

ModelCitizen;172558 Wrote: 
> When I rang NAIM to ask them about whether there were any likely issues
> around using a Transporter directly into a NAIM power amp I was told by
> Adam Meredith that the only thing that was required was the correct
> output impedance and signal level. He didn't mention ultrasonics at
> all.
> MC
I suppose it's possible that Naim have recently modified the design of
their power amps to remove the need for a bandwidth limited signal -
but that wouldn't apply to anyone who has an older sample.

Or it could be that they are familiar with the Transporter and know
whether it's safe to use. (As I speculated in my earlier posting, it
seems likely that the Transporter won't put out any nasty ultrasonics).


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[SlimDevices: Audiophiles] Re: Using a Naim Power Amp Without a PreAmp

2007-01-21 Thread ModelCitizen

Patrick Dixon;172351 Wrote: 
> you might not be able to hear any difference at all with a standard SB
> ;-)
> ( or Transporter)
Chortle!
MC


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Now what?

Transporter > Naim NAP 250 > PMC OB1s.
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[SlimDevices: Audiophiles] Re: Using a Naim Power Amp Without a PreAmp

2007-01-21 Thread ModelCitizen

cliveb;172365 Wrote: 
> The reason why you need to use a Naim preamp with their power amps is
> because Naim power amps rely on being fed a bandwidth limited signal.
> Lots of high frequency (ultrasonic) energy can drive them into
> instability. Naim preamps ensure that no nasty ultrasonics get through.
When I rang NAIM to ask them about whether there were any likely issues
around using a Transporter directly into a NAIM power amp I was told by
Adam Meredith that the only thing that was required was the correct
output impedance and signal level. He didn't mention ultrasonics at
all.
MC


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Now what?

Transporter > Naim NAP 250 > PMC OB1s.
Music catalog: http://modelcitizen.mine.nu/music.txt

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[SlimDevices: Audiophiles] Re: Using a Naim Power Amp Without a PreAmp

2007-01-20 Thread sonofcolin

cliveb;172365 Wrote: 
> The reason why you need to use a Naim preamp with their power amps is
> because Naim power amps rely on being fed a bandwidth limited signal.
> Lots of high frequency (ultrasonic) energy can drive them into
> instability. Naim preamps ensure that no nasty ultrasonics get through.

Exactly.
I use 82/SC/250. Sounds pretty good with SB3/Bolder mods.


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[SlimDevices: Audiophiles] Re: Using a Naim Power Amp Without a PreAmp

2007-01-20 Thread magnanimous

ModelCitizen;172225 Wrote: 
> Does Fifer do the same as me... or are you getting mixed up?
> 

Think I'm getting mixed up :-(


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[SlimDevices: Audiophiles] Re: Using a Naim Power Amp Without a PreAmp

2007-01-20 Thread cliveb

coop250;172340 Wrote: 
> Although I do wonder whether not using a good Naim preamp (82, 52 or
> higher) is reducing the sound quality of the power amp. I have read
> many times and it's also stated in their own manuals that Naim power
> amps shouldn't be used without their preamps, but if you've only got
> one source and that source also has attenuation control and a volume
> control, then why not.
The reason why you need to use a Naim preamp with their power amps is
because Naim power amps rely on being fed a bandwidth limited signal.
Lots of high frequency (ultrasonic) energy can drive them into
instability. Naim preamps ensure that no nasty ultrasonics get
through.

I'd have thought that, assuming the Transporter has proper anti-imaging
filters after the DAC, it won't be putting out any ultrasonics anyway,
so you're probably safe.


-- 
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Performers -> dozens of mixers and effects -> clipped/hypercompressed
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[SlimDevices: Audiophiles] Re: Using a Naim Power Amp Without a PreAmp

2007-01-20 Thread Patrick Dixon

coop250;172340 Wrote: 
> 
> I would love to hear from anyone who has 82, 52 or higher preamp and
> has done the above comparison.
> I had an 82 with 2 Hicaps, and trying it into a non-naim amp (I'd
already sold my 135s), I slightly preferred things without.  That was
with an SB+ though, you might not be able to hear any difference at all
with a standard SB ;-)

( or Transporter)


-- 
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[SlimDevices: Audiophiles] Re: Using a Naim Power Amp Without a PreAmp

2007-01-20 Thread coop250

There's just 2 boxes in my system, running into Shahinian Arcs:

Transporter - NAP250. Nothing else, no preamp, no Hicap or any other
power supply. Very minimalist and sounds great.

Although I do wonder whether not using a good Naim preamp (82, 52 or
higher) is reducing the sound quality of the power amp. I have read
many times and it's also stated in their own manuals that Naim power
amps shouldn't be used without their preamps, but if you've only got
one source and that source also has attenuation control and a volume
control, then why not.

I would love to hear from anyone who has 82, 52 or higher preamp and
has done the above comparison.

By the way TurnipMan you would need a 2x phono to XLR cable if you had
the NAP250 - Chord company can make them for you and can probably make
any other connection you may need if you tell them what amp you end up
with.

Hope this helps,
Craig.


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[SlimDevices: Audiophiles] Re: Using a Naim Power Amp Without a PreAmp

2007-01-20 Thread ModelCitizen

Does Fifer do the same as me... or are you getting mixed up?
I bought my NAIM-like cables from the Soundstable eBay shop
(http://stores.ebay.co.uk/SoundStable). Top quality cables and
unbelievably good value. Highly recommended. Make sure you specify
exactly the correct cable though (for my NAP250: dual phono to 240
degree 4 pin din with locking nut)!
MC


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Now what?

Transporter > Naim NAP 250 > PMC OB1s.
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[SlimDevices: Audiophiles] Re: Using a Naim Power Amp Without a PreAmp

2007-01-19 Thread Eric Carroll

TurnipMan;172048 Wrote: 
> Thanks for the quick response. The Wiki entry does explain some of the
> issues, but does not give the tech details for Naim power amps and also
> Naim use "funny" plugs and sockets so I'd like to know where I could get
> the components or a suitable made up cable in the UK.

Ah sorry I didn't realize you were asking an amplfier specific
question. Sorry I don't know. You could try checking the Naim web page
for the stats I used in the Bryston example, then go forth and
calculate.

Covering every amplifier with a wiki page is rather a tall assignment
with volunteers. But feel free to add a Wiki page when you figure it
out! ;-)


-- 
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[SlimDevices: Audiophiles] Re: Using a Naim Power Amp Without a PreAmp

2007-01-19 Thread magnanimous

I think "Fifer" has has TP connected directly to his NAP250, at least it
appears so from his sig. You could contact him for info.

Cheers

Richard


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[SlimDevices: Audiophiles] Re: Using a Naim Power Amp Without a PreAmp

2007-01-19 Thread TurnipMan

Thanks for the quick response. The Wiki entry does explain some of the
issues, but does not give the tech details for Naim power amps and also
Naim use "funny" plugs and sockets so I'd like to know where I could get
the components or a suitable made up cable in the UK.


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[SlimDevices: Audiophiles] Re: Using a Naim Power Amp Without a PreAmp

2007-01-19 Thread Eric Carroll

Check out the New Wiki page:
http://wiki.slimdevices.com/index.cgi?ConnectToPowerAmp

Let me know if it answers your questions.


-- 
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