a $5 turntable makes we wanna throw out my XM & I-pod!

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AV-geek
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16 Aug 2006, 4:37 pm

I've got really sensitive hearing, and I can hear well into the 16khz range. Because of this, I can pick out distortion a mile away, and I absloutely cannot stand poor quality audio. Well, lately, I've been getting a bit of listener fatigue with my two most frequently used sources of music...my I-pod, and my XM radio, which I listen to in my company van. My most favorite tunes I've always enjoyed just didn't invoke the enjoyment that they used to. I figured I was simply getting tired of listening to the same stuff

I was at a flea market over the weekend and I found a really nice professional grade Technics direct drive turntable for only $5. Most of my albums long since copied to cassette, then bought on CD, and then compressed to fit on my I-pod were dug back out again to try this baby out. The old turntable on that "all in one" system I had in high school long since gone. A few months ago, I found an old Stromberg-Carlson vacuum tube amplifier at a yard sale to, so I connected the newly found turntable up to that, and my Cerwinn-Vega 12 inch speakers I bought in college. HOLY CRAP!! !! this thing sounds NICE!! ! Yes, there are a few cracks and clicks in the audio, but it didn't take long to realize that I was not listening to a stereo in my office, but Geddy Lee, Alex Lifeson, and Neil Peart (RUSH) cranking out all the tunes with all their heart, along with many other musicians. The stereo was literally transparent as I heard every subtle nuance of music that was beyond the walls of the room. I wasn't just hearing drums, but I could tell where and how the drums were being hit, and the fact that every hit was different than the last. The square waves from synthesizers made me shiver they were so chilling.

As I drove home this evening listening to my XM radio I became readily apparent as to why I was getting such fatigue with listening to music...the audio quality on this thing SUCKS!! !! I could hear the variable bit compression switching in and out when high frequencies were present in enough quantitiy to demand a higher bit rate. Even then, it sounded garbled, like the cymbals were being played under water. Symballence in the "s" and "t's" of singing was so slopped out singers sounded as if they were spitting. Audio compression knocked all the punch out of the music, and brought the quiet passages up too loud. I'm ready to throw my XM out the window and be done with it, especially since they started playing commercials on the music channels...gotta love ClearChannel communications!

My I-pod sounded a little bit better, but still lacked that transparent feel that the turntable was giving me last night. It just sort of sounded dull and lifeless, and again, compression artifacts reared their ugly head. Yes, an I-pod stores several days of music on a disc about an inch and a half large, but it cannot compare with the fidelity of only 45 minutes of music stored on a huge 12 inch disc of vinyl! I couldn't wait to get home this evening and crank up this old system and re-introduce myself to my favorite music again!

Let's hear it for 50 year old recording technology!



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16 Aug 2006, 7:01 pm

Well av geek there's a diffrent format that might give you the full range of sound you want but it still very new and $$$ Here is a link about it. http://www.hdmi.org/resourcecenter/index.asp
that's the audio part
"New lossless audio formats: In addition to HDMI’s current ability to support high-bandwidth uncompressed digital audio and all currently-available compressed formats (such as Dolby Digital and DTS), HDMI 1.3 adds additional support for new, lossless compressed digital audio formats Dolby TrueHD and DTS-HD." HDMI press release site


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Enigmatic_Oddity
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16 Aug 2006, 8:35 pm

I can barely make out the difference between MP3s with varying bitrates. I guess I should consider myself lucky. Maybe you should turn up your headphones up really high until you lose enough of your hearing so that you can't notice the difference anymore. :lol:



TheBladeRoden
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16 Aug 2006, 10:55 pm

I'm with Enig_Odd on this one.


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nukleuz
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17 Aug 2006, 5:25 pm

iPods support WAV and ALAC (Apple Lossless Audio Codec) files. Also, there is third-party firmware called Rockbox which lets you use FLAC files on your (4th generation or later) iPod. FLAC is my preferred format, so I'm thinking about trying it out. I just haven't gotten up the courage to replace the Apple firmware yet.

http://www.rockbox.org/



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18 Aug 2006, 7:29 am

Ahhh, you kids with your digital technology. I must agree, the compression in satellite radio is terrible. MP3s? I can take 'em or leave 'em - they're sort of the PDFs of the audio world, and I listen to them strictly out of convenience. But there's nothing like sitting in the sweet spot of your favorite system and hearing EVERY NUANCE of a musical piece as if it's being performed right there in front of you. Do a side-by-side of an LP and an MP3 and see what wins.

AV Geek: I must ask which Technics you got. I've had a couple myself but none truly high-end. And do stop by vintagetechnics.com to find out more about yours.



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18 Aug 2006, 10:00 am

ZedSimon wrote:
Ahhh, you kids with your digital technology. I must agree, the compression in satellite radio is terrible. MP3s? I can take 'em or leave 'em - they're sort of the PDFs of the audio world, and I listen to them strictly out of convenience. But there's nothing like sitting in the sweet spot of your favorite system and hearing EVERY NUANCE of a musical piece as if it's being performed right there in front of you. Do a side-by-side of an LP and an MP3 and see what wins.

It just all stems from the fact that the black vinyl record contains the actual waveforms of the sounds scribed into a semi-permanent substrate while all of the digital formats, including conventional CD, are nothing more than electronic 'descriptions' of those waveforms at various levels of detail depending on the format and sampling and compression rates.

The old cliché of 'losing something in the translation' ALWAYS applies.

Now, granted, my 44YO ears are not as good as they were 20-30 years ago, but I can easily tell the difference between good digital encoding and bad. OTOH, the differences between high-quality encoded 128Kbs .mp3 files and those encoded at higher bitrates are usually beyond their capability to tell apart.

Mike



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18 Aug 2006, 6:56 pm

AV-geek wrote:
I've got really sensitive hearing, and I can hear well into the 16khz range. Because of this, I can pick out distortion a mile away, and I absloutely cannot stand poor quality audio. Well, lately, I've been getting a bit of listener fatigue with my two most frequently used sources of music...my I-pod, and my XM radio, which I listen to in my company van. My most favorite tunes I've always enjoyed just didn't invoke the enjoyment that they used to. I figured I was simply getting tired of listening to the same stuff

A few months ago, I found an old Stromberg-Carlson vacuum tube amplifier at a yard sale to, so I connected the newly found turntable up to that, and my Cerwinn-Vega 12 inch speakers I bought in college. HOLY CRAP!! !! this thing sounds NICE!! ! Yes, there are a few cracks and clicks in the audio, but it didn't take long to realize that I was not listening to a stereo in my office, but Geddy Lee, Alex Lifeson, and Neil Peart (RUSH) cranking out all the tunes with all their heart, along with many other musicians. The stereo was literally transparent as I heard every subtle nuance of music that was beyond the walls of the room. I wasn't just hearing drums, but I could tell where and how the drums were being hit, and the fact that every hit was different than the last. The square waves from synthesizers made me shiver they were so chilling.



My I-pod sounded a little bit better, but still lacked that transparent feel that the turntable was giving me last night. It just sort of sounded dull and lifeless, and again, compression artifacts reared their ugly head. Yes, an I-pod stores several days of music on a disc about an inch and a half large, but it cannot compare with the fidelity of only 45 minutes of music stored on a huge 12 inch disc of vinyl! I couldn't wait to get home this evening and crank up this old system and re-introduce myself to my favorite music again!

Let's hear it for 50 year old recording technology!


Congradulations for discovering Tube audio!

What tube compliment does the Stromberg Carlson amp have? You will need to know this eventually, even though most output tubes are still in production, the quality of construction on nearly all current production tubes, (made for the most part in the Czech Republic, Serbia, Russia and China) is not as good as old US, UK and Western European production.

Also, there may be hope for your Ipod as well as your XM tuner yet now that you have the tube amp. You will find that tube amplification greatly warms up ALL audio input. Many recording studios employ tube based gear to add some warmth to Digital Audio.

Many Mastering studios regularly use Manley, Telefunken, or Fairchild 670 compressors in the the final phase audio production. --The Telefunkens and the Fairchilds were made in the 50's an early 60's.

Another thing that you may be interested in is digital audio in the form of SACD. SACD has a very high sample resolution and sample rate, which effectively nullifies the jitter and digital artifacts inherant with RIAA standard 16 bit, 44Khz CD Audio. -Remember this standard was adopted by the recording industry for digital audio before the advent of the IBM personal computer.

Good luck with your new amp, and please get back to me with about the tubes in your amp.


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AV-geek
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18 Aug 2006, 8:52 pm

Here's the turntable I found, a SL- QD33:

http://www.vintagetechnics.com/turntables/slqd33.htm

It's got a Audio-Technica 3003 cartridge in it...a very bright, crisp sound to it...not sharp like that of a CD, but just so totally clear and transparent, tight sound

The Stromberg I found has 7355 finals, and 12 AX7 pre's with 12AU7 turntable and tape head preamp tubes. Pretty standard stuff that seems to still be avaliable brand new even today.

I'll hafta try running a line-in from my XM into the tube amp to see how it all sounds. I think you're right about the I-pod though, there's hope for that if I use a compression ratio that's 160 bits or higher. I'll only get that by making it off my own CD's and records...can't by that bit rate off of I-tunes. That's sort of a throwback to the old days of the cassette. I remember my Dad saying that he can make better tapes by purchasing the record album, and then copying the record to a high-bias cassette, than if he were to buy the music already on a cassette.



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18 Aug 2006, 8:56 pm

You can have tubes integrated with an iPod:

Image


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AV-geek
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19 Aug 2006, 7:40 am

Those look like McIntosh amps aren't they? Perfect for an ipod...connect it to a different kind of Mac!



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19 Aug 2006, 8:44 am

AV-geek wrote:
The Stromberg I found has 7355 finals, and 12 AX7 pre's with 12AU7 turntable and tape head preamp tubes. Pretty standard stuff that seems to still be avaliable brand new even today.


The 12ax7's and the 12au7's are common enough tubes. the 7355's on the other hand appear to be quite hard to find, with apparently no modern equivalent. from what I've seen though, they appear to be quite similar in voltage handling/ power output to 6L6GC/5881/KT-66, or 6CA7/EL34 tubes. I have no idea of their octal socket pin compatibility with either of the two types.

The good news though, is that a few resistor or capacitor changes in the bias circuit , as well perhaps some addtional octal socket rewiring can make the amp compatible with modern production tubes. You may also want to try using 6550's or KT-88 equivalents for longer tube life and greater headroom. --The 6550's and KT-88 equivalents are pin compatible with EL34's.


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19 Aug 2006, 9:24 pm

AV-geek wrote:
Those look like McIntosh amps aren't they? Perfect for an ipod...connect it to a different kind of Mac!


I found the company that makes them here:
http://psiberaudio.com/

and more specifically here:
http://psiberaudio.com/iPod_3.htm

That being said, the pair of monoblocs costs $900 US. What it appears you get is a pair of class'A' monoblocs, each of them running off a single KT-88 output tube putting out 15 watts per side. The KT-88 should not only last a while in these at 15 watts considering the fact that a 100 wat class 'AB' amp can run on a pair of them, but also have plenty of on demand headroom.

The real sad fact of the matter though, is that the current production KT-88's still don't come close to the original Genelex and Marconi Osrams. The best ones are purportedly made by Shungang in China, and to be perfectly honest, I'm still leery of Chinese tubes after my experience with a set of Chinese EL34's that I stuck in a Marshall 4204 guitar amp. --They lasted all of about 3 months from being played at low volumes, before they became microphonic.


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08 Sep 2006, 9:21 pm

I'm impressed with your knowlege of tube audio, Fogman. I love my tubes, but I'm not a tech at all. I've cloned a Fender amp and put together a few kits, but my first scratch built PPP amp is not yet finshed. Maybe by the end of fall ... :oops:

I've only recently (last summer) re-discovered the wonderful sound of a decent turntable. I have a couple of old Duals, but I'd like to get a modern belt drive at some point. Something like a Rega or VPI would make my day!

AV Geek,

Did you ever hook up your Ipod to your Stromberg Carlson? Does an Ipod have an analog line level out or would you need a DAC?


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09 Sep 2006, 3:49 pm

Had to laugh at the iTube thing. I wonder how much of the digital edge it would take off the sound. Would it be enough to justify the $900 price? (love the "hand-wired" reference in the decsription - reminds me of Zenith back in the day)

AV-geek: I'm kinda partial to Audio-Technica carts too. I'm thrilled to death with the AT440ML I put on my Pioneer last year.

DirtDawg: which Duals? I have a 1212 I got not long ago, and a 1229 that needs a lube job. Love to get that fixed up.



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09 Sep 2006, 6:25 pm

I have a 1219 with the same AT cart you mentioned (AT440, but maybe an earlier suffix) and a 650RC with an Ortofon ULM55E. I run whichever one I'm using at the time through a Lazarus Cascade tube pre/phono and then to 2 EL84 SETs in mono, plus various single driver speakers to complete my minimalist rig.

Recently I put an old Garrard back in good shape for use on 78s. I put a special stylus designed for 78s on an old Shure I had laying around and it really works great. I can't believe how many great old classical collections are available on 78rpm for a quarter. I am totally addicted! Kinda wierd for an old headbanger, but that's me ... 8)

Furtwangler conducting Beethoven's 9th played on a 'direct to disc' 78 sounds like heavy metal to me!


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