Live Mail

[John Williamson]

In news:[email protected],

<Bose speakers>

IME, Bose speakers are acceptable where the sound they're producing is
the background to other things, which is why they're so popular in Curry
Houses and Pubs. It's a bland, ignorable balance.

If you think that the sound from them is an acccurate rendition of
what's on the medium, even if that medium is cassette tape or medium
wave radio, then get your hearing checked.

Just saying, like...

 

[charlie]

In Char Jackson typed:

What do you mean talking to a wall? Sure I admit that cheap drivers
using an equalizer sounds better than not. But does it sound better than
a full spectrum speaker system? It isn't even close! As I can still hear
a huge difference between the two. Even Wikipedia missed that one.

For the bass for example, sure taking cheap drivers and boosting up more
makes it sound better. I don't disagree a minute. But it is missing the
feeling. And without it, it just sounds and feels fake. On the other
hand, my Sansui SPX9000 speakers with a 16 inch bass. there is no fake
sound from it at all. It is so sharp and clear. And the windows, floor,
walls, and everything else shakes with it.

And the highs from the equalizer through cheap drivers sound so muffed
to me. Many may buy this sound as very good, but not people like me. As
we can hear the huge difference.

So I need a speaker system that can produce the full audio spectrum, or
it sounds fake to me. And I never heard a system like the 901's for
example to sound real. I already admitted that you can take inadequate
drivers and make them sound better through an equalizer. Sure it sounds
better. But it still isn't as good. As all it is a cheap trick and
nothing more. Some are fooled, but not all of us.

And I am still waiting for you to answer how a low powered amp can harm
my Sansui SPX9000 speakers. As I can't think of a single reason why that
could happen. But I am open minded and if you want to educated me, then
go for it.

And no, I didn't find this with CTRL-H, although that would have been
way too easy.

"And I am still waiting for you to answer how a low powered amp can harm
my Sansui SPX9000 speakers. As I can't think of a single reason why that
could happen. But I am open minded and if you want to educated me, then
go for it."

A poorly designed or faulty amp can "Zap" the speakers with enough DC to
do damage, or excessive high frequency distortion can get to tweeters.
Fuses are usually used to protect things, but they may not be fast enough.

The biggest problem I've found with speakers is that they dry out with
age, and the frequency response suffers. I have a pair of Electrovoice
12TRXBs that need recone-ing simply because they are over forty years
old. The cabinets were custom built, using actual tested speaker
behavior in an OEM sound chamber, with the "golden rule" used to get the
proper cabinet front, side, and depth. They were again tested in a sound
chamber, as a sealed box, ported with a rectangular port, and again with
a tuned tube port.

In 1980, they were compared with several "top of the line" Japanese
speaker systems using a Sansui receiver with a true RMS output of over
100 watts per channel. The 12TRXBs won hands down. Sadly, they are no
longer made, and the available replacement cones don't have the same
sound quality.

 

[J. P. Gilliver (John)]

In message <[email protected]>, charlie

"And I am still waiting for you to answer how a low powered amp can
harm my Sansui SPX9000 speakers. As I can't think of a single reason
why that could happen. But I am open minded and if you want to educated
me, then go for it."

A poorly designed or faulty amp can "Zap" the speakers with enough DC
to do damage, or excessive high frequency distortion can get to
tweeters. Fuses are usually used to protect things, but they may not be
fast enough.

[]
Yes, it's the high frequency distortion products that are most likely to
do damage (unless it really is putting out lots of DC). A low powered
amp turned up to beyond clipping can produce more power at the high end
than tweeters are designed for - though _hopefully_ the clipping
distortion will be heard before this happens. (Less so with valve amp.s
which "soft clip" more, than semiconductor amp.s which hard clip; this
is _sometimes_ what "valve sound" is taken to mean. [Sorry, UK
terminology: in US, for valve read "toob".])

 

[charlie]

In message <[email protected]>, charlie

"And I am still waiting for you to answer how a low powered amp can
harm my Sansui SPX9000 speakers. As I can't think of a single reason
why that could happen. But I am open minded and if you want to
educated me, then go for it."

A poorly designed or faulty amp can "Zap" the speakers with enough DC
to do damage, or excessive high frequency distortion can get to
tweeters. Fuses are usually used to protect things, but they may not
be fast enough.

[]
Yes, it's the high frequency distortion products that are most likely to
do damage (unless it really is putting out lots of DC). A low powered
amp turned up to beyond clipping can produce more power at the high end
than tweeters are designed for - though _hopefully_ the clipping
distortion will be heard before this happens. (Less so with valve amp.s
which "soft clip" more, than semiconductor amp.s which hard clip; this
is _sometimes_ what "valve sound" is taken to mean. [Sorry, UK
terminology: in US, for valve read "toob".])

I still prefer the "sound" from tube amps! The gradual rolloff and
the way harmonics behaved gave them the smooth sound. Something about
even and odd order harmonic content as I faintly remember. It seems most
of the new and available tubes are made in eastern Europe.
The rest seem to be military surplus. In the late 90s the US military
surplussed out a great deal of electronic parts, including tube, to the
extreme that they are buying some back these days.

The Sansui I referred to was a D9000, solid state, and used an amp that
was virtually flat from about 10Hz to double the usual audio range
~45,000Hz. It had a "brute force" DC power supply and class "A" amps.
Sadly there are only limited parts to keep it running, much like many
of the older tube amps. One of the nice things about the 12TRXBs was
that the Sansui had massive "headroom", and a medium feed back loop, so
the speakers worked much better than they did with an amp of just 50w
RMS or so. The "clarity" was very good.