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Phono


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12 replies to this topic

#1 of 13 OFFLINE   Alex Kuch

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Posted November 07 2005 - 04:01 AM

What does the phono on the back of a receiver do? I heard it's for record players. Also if I were to use a separate amplifier and just use my receiver for its soundfields and audio options, which auxillary inputs and outputs do i use to run through the receiver to the amplifier?

#2 of 13 OFFLINE   Tim Hoover

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Posted November 07 2005 - 04:31 AM

The phono input on the back of your receiver includes a built-in preamp for turntables, which is necessary because turntables put out much lower signal voltages than other components such as CD players. Unless your receiver can be configured to shut off the phono preamp, plugging other devices into this input will most likely result in overdriving the preamp section, with distorted results.

To add a separate amp to your setup, all you'll need to look for is a set of 6 jacks marked "pre out" on the back of your receiver. You'll simply run RCA cables from these to the RCA inputs on the separate amp and run your speaker cables from that amp.
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#3 of 13 OFFLINE   Alex Kuch

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Posted November 07 2005 - 04:39 AM

Thanks, you explained it well

#4 of 13 OFFLINE   Tim Hoover

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Posted November 08 2005 - 12:23 AM

No problemo Posted Image
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#5 of 13 OFFLINE   Gary Seven

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Posted November 08 2005 - 03:14 AM

Quote:
What does the phono on the back of a receiver do? I heard it's for record players.

All of a sudden, I feel old.

#6 of 13 OFFLINE   Steve_L

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Posted November 08 2005 - 09:30 AM

All of a sudden, I feel old.


I hear ya!! Posted Image

#7 of 13 OFFLINE   Dan Lindley

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Posted November 14 2005 - 05:20 AM

Yup, at first I thought it was a joke question.... but of course, I'm probably old too.

Just to add a constructive note, there are outboard/external phono preamps for those who want to get into phono/vinyl but don't have an AVR w/phono inputs. And some new turntables (the things that play the vinyl records) have phono preamps, too).

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#8 of 13 OFFLINE   Chu Gai

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Posted November 14 2005 - 05:41 AM

And some even have digital outs too.

#9 of 13 OFFLINE   Henry Gale

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Posted November 14 2005 - 02:32 PM

I'd not heard mention of a "Laser Turntable" for several years and the last time I had it was in the $50,000 range.
Last week I came across the ELP Laser Turntable.
It's now only $2,800!

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Some men are searchin for the Holy Grail
But there ain't nothin sweeter 
Than riden' the rails."
-Tom Waits-

#10 of 13 OFFLINE   Kevin T

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Posted November 15 2005 - 12:03 AM

henry:

keep dreaming. the elp laser turntable starts at $15k. the elp declicker starts at $2800.

http://www.elpj.com/...e/declicker.php

kevin t
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#11 of 13 OFFLINE   Henry Gale

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Posted November 15 2005 - 07:28 AM

Thanks Kevin!

Turns out I'll need to send in an extra $2,000.00 to play my Sun Record Company 78s.

LT-1XRC Plays LP, 45 rpm and 78 rpm $17,000

"I was born to ramble, born to rove
Some men are searchin for the Holy Grail
But there ain't nothin sweeter 
Than riden' the rails."
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#12 of 13 OFFLINE   alan halvorson

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Posted November 15 2005 - 07:53 AM

The phono explanation is incomplete. A phono input, in addition to amplifying the very low signal level, also includes equalization. The frequency response of an LP is intentionally cut unflat on both the low and high ends. The low end is cut to reduce the area taken by bass frequencies, which can be quite a bit. The high end is boosted. On playback, the bass is boosted and the highs cut; the later has the effect of reducing noise.

Waaaay back in the 50's, there was no industry-wide phono equalization standard with the result that there were a number of equalization curves in use, and phono preamps included switching for them. A real pain, but standardization came in the 60's so this is no longer a problem, unless you play very old discs.

So, you can see I'm really old.
They're coming to take me away, ha-haaa!!
They're coming to take me away, ho-ho, hee-hee, ha-haaa To the funny farm. Where life is beautiful all the time and I'll be happy to see those nice young men in their clean white coats and they're coming to take me away, ha-haaa!!!!!
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#13 of 13 OFFLINE   JeremyErwin

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Posted November 15 2005 - 08:12 AM

There's a stereophile review of the ELP. Given that they review lots of funky turntables, it might be interesting/amusing, if not unbiased.