Ipod Imod with passive pre amp and Naim power amp

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charlie

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Ipod Imod with passive pre amp and Naim power amp
« on: 21 Oct 2006, 10:35 pm »
Having received my Imodded Ipod and tried different set-ups I have settled on a simple system which sounds great.

Ipod, Audio Synthesis Passion pre amp and Naim 250 amp driving Epos ES14 speakers. Pictures are below. The prices are roughly: Ipod - $400, Passion - $450, Naim - $1500, Epos - $400. Total is $2800.

The Passion is a passive pre amp, without power, purley providing resistance to the signal. It is incredibly clean and characterless. I was worried that the Imod may not have been loud enough but it has easily enough volume in this set-up. The sound is very nice - clean and dynamic, although it is still slightly grainy. There are ways of reducing this but at the moment there's no need. The Naim sound is very modern, and suits dance and electronic music really well. I just a/b'd a pair of Ipod Photos in this set-up - one modded and one not - with the same MP3 file. The modded version is warmer, less digital sounding and clearer. The unmodded Ipod sounds muddy and distorted in comparison.







The next upgrade would be to a pair of mono Naim amplifiers - 135s. I'll need to pay around $3,000 for a pair so it may be a while until I make the move. For now, this set-up sounds very good. As the Ipod burns in I think the sound will improve somewhat.

Thanks Vinnie for a great service.

Charlie

Jampot

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Re: Ipod Imod with passive pre amp and Naim power amp
« Reply #1 on: 21 Oct 2006, 11:17 pm »
If you don't have lossless files to play on the iMod Charlie, you aren't even scratching the surface of what can be heard.

$3000 buys an awful lot of music, but re-ripping what you have is completely free!

Welcome to the iMod fan club :smoke:

Jim

charlie

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Re: Ipod Imod with passive pre amp and Naim power amp
« Reply #2 on: 22 Oct 2006, 10:19 am »
The problem is that I have never bought a CD in my life and don't intend to, so I am relying on downloads.

Is there a comprehensive list of the quality of file formats in order of quality?

Charlie

Jampot

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Re: Ipod Imod with passive pre amp and Naim power amp
« Reply #3 on: 22 Oct 2006, 01:35 pm »
I found this thread -

http://www.audiocircle.com/index.php?topic=32490.0

It will give you some idea, and has links for more reading. I think the iTunes store downloads are 320 against 'ordinary' mp3s at (usually) 128.

Some download sites offfer Lossless compression but the selection is limited, and the ipod will only play Apple's own lossless unless you hack the firmware with Rockbox. Thread on that in the RWA circle if you look back.

Do you have a large vinyl collection that you don't have cds?

Jim

charlie

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Re: Ipod Imod with passive pre amp and Naim power amp
« Reply #4 on: 22 Oct 2006, 03:08 pm »
Thanks for the info. I know about Rockbox and it's something I may do soon. 320k MP3s sound great. Where possible I avoid 128k files.

I sold my Linn LP12 and power supply recently. I am now deciding how best to get rid of 3,000 records. One by one on Ebay is profitable but very time consuming. I've sold $15,000 worth of vinyl this year but there's still a lot left.

Charlie


bundee1

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Re: Ipod Imod with passive pre amp and Naim power amp
« Reply #5 on: 22 Oct 2006, 04:30 pm »
Itunes store downloads are 128kbps so not even close to great sounding. ALAC (Apple Lossless) files are the way to go. The grain you're hearing is probably from the compression. Give it a shot with a cd. You must own one at least? Or borrow one and rip it in ALAC and mp3 and see if you can hear the difference.

Jampot

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Re: Ipod Imod with passive pre amp and Naim power amp
« Reply #6 on: 22 Oct 2006, 04:56 pm »
Unless you take a 'very' high high ground with regard to artist's rights, you 'own' the right to listen to your LPs, and therefore can make cassette (who remembers those :roll:), mp3 or other copied media for your own use. Actually ripping Lps is a pita (and you don't have a tt any more so not an option) but as long as you keep them, perhaps a friend, relation or work colleague has cds of the same stuff you could rip?

If you sell them, use the money to buy the cd of the ones you still like to hear. Rip them and put them away in the attic. No need to have a cd player, just plenty of hard drive space so you can change the stuff on the iMod occasionally.

Unless lossless down loads become readily available you will never benefit from the full potential of what you have never mind $3000 of monoblocs, unless you by 'proper' cds and rip them.

If you pay top money for boni-fide down loads, you aren't getting your money's worth because the bit rate isn't good enough.

Lots of stuff on the internet to testify that ripping cds properly does not compromise the quality and in a lot of cases testimony that the actual playback is superior -EVEN when re-written to blank cdrs....

Go figure. Better still borrow a few and experiment.

Jim

charlie

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Re: Ipod Imod with passive pre amp and Naim power amp
« Reply #7 on: 22 Oct 2006, 09:38 pm »
ALAC is lossless. 320 MP3 is also very very close to lossless. I'll check out the differences in a CD ripping test this week. Yes I do own about three CDs!

However, it's common knowledge that ripping CDs is where the problems start. Does anybody have any thoughts as to the best software or methods for ripping CDs?

On the subject of vinyl, the time and equipment involved was a right pain. I used the Linn turntable powered by a high end PSU through a Naim pre amp into a studio soundcard (Gina) into a Windows 98 PC running Soundforge. As far as I can determine there's almost no better way to turn an analogue music source into a digital file.

I used these files for mastering vinyl compilation LPs produced in the Czech Republic. The WAV files I generated using this method sound better than the same songs ripped from CD as WAV files.

Charlie

Jampot

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Re: Ipod Imod with passive pre amp and Naim power amp
« Reply #8 on: 22 Oct 2006, 10:56 pm »
Loads of stuff in The Square Circle about ripping but for lossless on the ipod without Rockbox your stuck with iTunes.

Try to use an older version -I stick with version 4.2 because it works and there are fewer security issues - make sure you have error checking on, and select the lossless codec.

You can find the old version with a google search (Apple won't support it - no surprise there) so it's easier to tell it not to update automatically.

Jim

Vinnie R.

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Re: Ipod Imod with passive pre amp and Naim power amp
« Reply #9 on: 23 Oct 2006, 12:44 pm »
Quote
The next upgrade would be to a pair of mono Naim amplifiers - 135s. I'll need to pay around $3,000 for a pair so it may be a while until I make the move. For now, this set-up sounds very good. As the Ipod burns in I think the sound will improve somewhat.

Thanks Vinnie for a great service.

Charlie

Hi Charlie,

Welcome to the club!

Thank you for posting and I'm glad you are enjoying your iMod.  Just wait until you reach the 200+.... it gets VERY good!  8)

When ripping with iTunes, I recommend that you turn ON the error correction option.

IMHO, Apple Lossless or WAV encoding are the ways to go to get the max out of the iMod. 

As for converting vinyl to digital, this really does a fantastic job:
http://www.redwineaudio.com/Olive.html

 aa

Cheers!

Vinnie