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* Connect TV audio output to old stereo amp - 2 messages, 1 author
http://groups.google.com/group/sci.electronics.repair/t/f9517efe346c55f4?hl=en

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TOPIC: Connect TV audio output to old stereo amp
http://groups.google.com/group/sci.electronics.repair/t/f9517efe346c55f4?hl=en
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== 1 of 2 ==
Date: Tues, Jul 26 2011 6:41 pm
From: "Arfa Daily"

<PlainBill@yawhoo.com> wrote in message
news:nplo2719lrg5jpaghg40ltl8o8bekcb42c@4ax.com...
> On Sun, 24 Jul 2011 10:15:13 -0400, Al Moodie <nospam@nospam.com>
> wrote:
>
>>Hi,
>>
>>Not sure if this is the correct forum, but it is the only one I am
>>familiar with.
>>
>>I have an old audio system, Technics SU 8022 stereo amp attached to
>>large quaulity technics speakers, works fine.
>>Have a Sony Bravia LCD TV which has an audio output socket which I use
>>for headphones occasionally.
>>Does it make sense to attempt to connect the TV's audio output to the
>>Technics amp to get better sound quality.
>>
>>Sony TV Audio out:
>>500mVrms (100% modulation)
>>More than 1 Vrms at max volume setting
>>Impedance 47k ohms
>>
>>Technics amp input:
>>Phono 2.5mV 47k ohm
>>Aux 150mV 27k ohm
>>
>>I assume I will need some kind of voltage/impedance matching between
>>the two units.
>>
>>Al Moodie.
> There are several issues.
>
> First of all, do not use the phono input; it is designed for a
> magnetic cartridge, has RIAA equilization, and will seriously
> overamplify the bass frequencies.
>
> Second, I would spend some time reading the manual for the TV, and
> studying the function of the audio output RCA jacks. If they can be
> configured to suit your purposes, they would be preferable to the
> headphone jack.
>
> Third, you are setting up a situation where the TV will be turned
> off, but the amplifier will still be on. For a number of reasons,
> this is not desirable.
>
> PlainBill

My AV amp stays on all the time, and it doesn't cause me any problems ...

Arfa

== 2 of 2 ==
Date: Tues, Jul 26 2011 6:51 pm
From: "Arfa Daily"

"Al Moodie" <nospam@nospam.com> wrote in message
news:sd9o279s6jhotd034for9red97cok8kguk@4ax.com...
> Hi,
>
> Not sure if this is the correct forum, but it is the only one I am
> familiar with.

This is a good place to get the advice that you need, but please note, it is
not a forum, it is a usenet newsgroup. Forums are typically web based and
have moderators who have access to the content allowing them to edit or
remove posts. Usenet news groups usually do not have any kind of moderation.
You might be accessing this group via a web-based 'front end'. There are
quite a few about now. It doesn't really make a lot of difference from a
user point of view, unless you get into an argument. Also, replies posted on
the group can be slow to be trawled by the front end site. If you are
accessing via one of these websites, you might consider making use of one of
the free usenet clients such as Xnews, for an altogether better experience.

Arfa

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