I have just become aware that one of the variable resistors (Mid Frequency
Attenuator) on the rear of one of my speakers is on the fritz.

Either the MF driver cuts out and/or the resistor, when turned, is noisy. I
have managed to 'clean' the resistor somewhat by turning it back and forth a
few times, but it is still a little noisy.

http://flickr.com/photos/22432327@N02/3136967471/ photo here.

Now I very little knowledge of the internals of a speaker so I would
appreciate some advice from someone who is more qualified than I am.

Looking at the panel in the photo, I would presume removing it would give me
ready access to the resistor, but can I expect any sealant here or are the
screws the only thing holding it in ?

I know I can get replacements of these things from an electronics components
shop, so any clue as to the type or rating would be appreciated.

Failing replacement, can I simply bypass it by removing it altogether?. I
usually run the MF one wide open, so I won't be too bothered if I lose the
control.

At the moment I have managed to find a spot where the driver is working, but
I'd prefer to find a more permanent solution.

"GregS" zekfrivolous.com> wrote in message
news:giqs7m$mu1$1@usenet01.srv.cis.pitt.edu...

Hello, all. I have the subject audio preamp/tuner that I purchased way
back in 1991. It has worked flawlessly over the years but yesterday
started randomly power cycling (the unit uses a relay) without operator
intervention. When it's on and feeding the companion GTP-500 II audio
power amp everything works audio-wise except that in addition to the
power cycling, infrared remote control has also been rendered
inoperative. Has anyone seen this or similar behavior in other
products? I currently do not have the service manual. I did unplug the
unit from the AC line for 24+ hours but upon restoring AC power the
problem continues. Thanks for your time and comment.

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Archive-name: AudioFAQ/part13
Last-modified: 2007/07/12
Version: 2.17

20.0 Miscellaneous

20.1 What do I need to know about warranties?
Warranties have a few basic components. The first is the term
of the warranty. The second is what is covered. The third is
who supports the warranty. The fourth is what restrictions.

Term is fairly self evident. What is covered is more detailed.
In audio electronics, typically everything is covered with a
"parts and labor" warranty. Often mechanical components such as
tape heads are covered by different terms, such as shorter terms
on labor and longer terms on parts. Likewise, speaker
warranties vary widely, from unconditional with no term limit to
a basic 30 days parts and labor.

Some warranties come from the manufacturer. Others come from
the dealer. Still other warranty support is available with
certain premium charge cards.

Archive-name: AudioFAQ/part10
Last-modified: 2007/07/12
Version: 2.17

17.0 Mail Order
Mail order is appealing. The general hope is that by using mail
order, you avoid pushy sales people, you pay fixed, discounted
prices, and you have written catalog descriptions to...

Archive-name: AudioFAQ/part11
Last-modified: 2007/07/12
Version: 2.17

18.0 Network Protocol

18.1 What are the audio newsgroups? Which group should I post to?
It is important to post to the right group. There are a few
reasons for that. First, you want to be read by people who
are knowledgable and/or interested in your topic. Second,
you want to avoid the ire of people who don't have your
perspective or won't tolerate your ignorance. The audio
newsgroups are frequented by a wide group of people, including
some outspoken experts who know their stuff and some serious
purists who won't consider lower levels as acceptable.

That said, here's the list of newsgroups and an explanation
of their content:

rec.audio: The original newsgroup, which is being phased out.
rec.audio.car: This newsgroup supports discussion on different
brands and models of car stereo, and also is an open
forum for talk...

Archive-name: AudioFAQ/part8
Last-modified: 2007/07/12
Version: 2.17

15.0 Wire
More than any other topic, speaker cables and equipment
interconnects seem to use up rec.audio.* bandwidth echoing
the same theoretical arguments, testimonials, and opinions.
Controversy can be stimulating, educational, and also amusing.
Please try to keep postings aimed at one of those three goals,
and avoid the insults and emotion. Also, try to avoid
echoing a common position or principle, as described below.

15.1 Do speaker cables matter?
To avoid confusion and repetition, here is some terminology,
thanks to Steve Lampen of Belden Wire & Cable Co.

A wire is a single conductor made up of one or more conducting
elements, but all configured (as in a stranded design) to act
as a single conductor. Mostly, this is coated or covered by
plastic, rubber, enamel or similar insulators.

Archive-name: AudioFAQ/part6
Last-modified: 2007/07/12
Version: 2.17

13.0 Listening Rooms and Houses

13.1 How should I place speakers in my room? What size room is best?
You are after two important, distinct goals: flat frequency
response and good three-dimensional image. At your disposal is
the room size, the room shape, speaker height, speaker
placement, listening position, and room treatments. Even though
good speakers are essential to good sound, room effects are also
extremely important. In many cases, the differences in room
effects will be more noticeable than spending twice as much on
speakers!