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RE: Amplifying rear speakers separatly
- To: <ukha_d@xxxxxxx>
- Subject: RE: Amplifying rear speakers separatly
- From: "Nikola Kasic" <nikola@xxxxxxx>
- Date: Fri, 29 Mar 2002 14:30:43 -0000
- Delivered-to: mailing list ukha_d@xxxxxxx
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
Mark,
Where
can I found that Parasound Zamp and see how they look
like?
Nik
Nikola,
You
could try a Parasound Zamp - they are about the size of your average Wrox
Press book :)
Tony
Thanks Mark,
Can you please help me with this, just to finish the
thread:
I
want to play music (radio/CD/MP3 whatever) from my amplifier in bedroom. I
have no speaker cables installed, and it'will not be easily possible to
install them, the only cable I have is CAT6 network. I already found that
it's not possible to use CAT6 as speaker cables (it is, but results will be
crap), so my only option is to use KAT5 and transfer line level
signal over CAT6 into bedroom. However, I don't have space in bedroom
to put separate "normal" amp, so I plan to find small, compact amplifier
and
hide it somewhere, and install NXT Wharfdale Loudpanels and put them on the
wall. Subwoofer that comes with them, and small amp, I plan to hide under
the bed.
Because, amplifier will be hidden, and volume control (if it has it)
inaccessible, I would like to control the volume from the main (Sony) amp
in
the living room. Of course, I have to sort out IR distribution for that, if
I don't want to walk to living room.
Do
you know where I can find such small amp, which can drive Loudpanels? Just
checked on Richer Sounds, and they don't have them on web site anymore, but
I'll find them somewhere. What power rating I should look for? Loudpanels
are rated as 30W per speaker + 25W subwoofer.
It
seems that you're an expert on this topic (according to the gear you have
installed :-)).
Cheers,
Nik
Nik,
Everything else you said is
perfectly correct.
Regards,
Mark Harrison Head of
Systems, eKingfisher
-----Original Message----- From: Nikola
Kasic [mailto:nikola@xxxxxxx] Sent: 27 March 2002 10:31 To:
ukha_d@xxxxxxxSubject: RE: [ukha_d] Amplifying rear speakers
separatly
But, is the rest that I said O.K. or I'm talking
b...cks. Nik
-----Original Message----- From: Mark Harrison
[mailto:Mark.Harrison@xxxxxxx] Sent: 26 March 2002 17:41 To:
ukha_d@xxxxxxxSubject: RE: [ukha_d] Amplifying rear speakers
separatly
Nikola,
If you have a volume control, you have
variable gain.
If you don't have a volume control, you have fixed
gain.
Mark Harrison Head of Systems, eKingfisher
-----Original Message----- From: Nikola Kasic
[mailto:nikola@xxxxxxx] Sent: 26 March 2002 17:04 To:
ukha_d@xxxxxxxSubject: RE: [ukha_d] Amplifying rear speakers
separatly
I think that trick is then in amplifiers: You have
3 amplifiers: 2 for front and 1 for rear speakers. Integrated amp on
front drives treble speakers Power amp drives basses on
front Pioneer drives rear speakers
I asume that we can simplify
this to having two amps, one for front, one for rear speakers. But it
seems that the trick is in amplifiers:
A power amp has FIXED GAIN,
rather than a variable gain, so you need something else to control the
volume, otherwise it would always be at max.
What does this
mean? How can I know if amplifier has fixed or variable gain? E.g. I
have Sony STR DB 1070 amp, which has 5.1 channel outs and 5.1 pre-amp
outs. I asume that pre-amp ones are interesting ones. Then I should
connect pre-amp outs for rear speakers into line in of some
small stereo amplifier. I plan to find some small, compact, stereo
amplifier with volume control only, which can be easily hidden, and
connect Sony pre-amp out ->KAT5-> small amp Line in. Is that
O.K. Then, I plan to adjust the level of rear amp with sound level
meter at some reference level and from then on, not to touch it
anymore. When I raise or lower the volume on the main amp (Sony), the
volume should change on all speakers. Is my theory
O.K.? Nik
-----Original Message----- From: Mark
Harrison [mailto:Mark.Harrison@xxxxxxx] Sent: 26 March 2002
15:51 To: ukha_d@xxxxxxxSubject: RE: [ukha_d] Amplifying
rear speakers separatly
Git!
OK, here goes, how I do
DVD playback:
ALL SIGNALS FROM HERE GO AS DIGITAL STREAMS, EITHER
PCM OR DOLBY DIGITAL DEPENDING ON THE SOURCE MATERIAL
- The
source is a Pioneer DVD player (second black box from the bottom on the
right-hand stack)
The audio goes, via SP/DIF (the single reddy-pink
cable), down onto the floor, then into the source switch
- The
source switch is a Meridian 562V, (middle black box, narrower width, on
the left-hand stack) --- It's worth noting that the other sources, such
as the DDAR (top black box, narrowest width, on the left-hand stack)
that go into the 562V as analogue get CONVERTED into DIGITAL at this
point... All the DSP stuff happens entirely in the digital
domain.
Assuming that the selected source is "DVD", this goes, via
(a virtually impossible to see) SP/DIF cable into the
processor
- The processor is a Meridian 561 (lower black box,
narrower width, on the left-hand stack)
WHILE THE PROCESSOR IS
CAPABLE OF OUTPUTTING UP TO 8 CHANNELS OF AUDIO, IN EITHER ANALOGUE OR
DIGITAL FORMAT, AT PRESENT I ONLY USE 4 CHANNELS, AND OUTPUT THEM ALL
AS ANALOGUE AT LINE LEVEL
Front pair
The main stereo pair
come out on a (virtually impossible to see) pair of phono connectors
into the integrated amp
- The integrated amp is a John Shearne
Phase 2 (wider width, but thinner depth top black box on the right-hand
stack.) --- the black speaker cables go out of this and drive the
treble drivers on the front speaker pair
The integrated amp also
has a line-level passthrough on the (purpley-pink) analogue pair to the
power amp
- The power amp is a John Shearne Phase 2 (wider width,
but thinner depth second-to-top black box on the right-hand
stack.) --- The pinky speaker cables go out of this and drive the bass
drivers on the front speaker pair
Rear pair
The rear
stereo pair come out on a (virtually impossible to see, but you can see
the red and white boots on the processor) anlogue pair, into a KAT5
TX
- The KAT5 TX is almost out of shot, on the floor, but you can
just see a corner of it at the far right on the bottom edge of the
picture, to the right of the mains block
... this goes into a
CAT5 socket in the wall, back to the patch panel, where it's patched to
a CAT5 socket at the other end of the room. This goes into a KAT5 RX,
which drives an old Integrated amplifier (Pioneer A-400), which drives
a the rear pair of speakers.
Volume controls
The logic in
this is that the "changing the volume" circuitry (pre-amp) is kept
separate from the "amplifying lots" circuitry (power amp) to avoid
interference.
A power amp has FIXED GAIN, rather than a variable
gain, so you need something else to control the volume, otherwise it
would always be at max.
The pre-amp, which is the only volume
control that ever gets touched, is on the processor. The processor, as
we've seen purely operates on a DIGITAL input, and turns it into
line-level, ANALOGUE outputs.
In practice, both the front and rear
amplifiers actually have volume controls, but these are just left
"whacked up to about 75%", and the volume adjustment is done on the
processor.
Mark Harrison Head of Systems, eKingfisher
-----Original Message----- From: James Hoye
[mailto:james.hoye@xxxxxxx] Sent: 26 March 2002 15:07 To:
ukha_d@xxxxxxxSubject: RE: [ukha_d] Amplifying rear speakers
separatly
Ahh I see a man about to be initiated into the
"real" audio club :-)
Go mark go mark go mark :-)
And feel
free to refer to http://groups.yahoo.com/group/ukha_d/files/mharrison_avkit.jpg <http://groups.yahoo.com/group/ukha_d/files/mharrison_avkit.jpg>
< http://groups.yahoo.com/group/ukha_d/files/mharrison_avkit.jpg <http://groups.yahoo.com/group/ukha_d/files/mharrison_avkit.jpg>
> < http://groups.yahoo.com/group/ukha_d/files/mharrison_avkit.jpg <http://groups.yahoo.com/group/ukha_d/files/mharrison_avkit.jpg>
< http://groups.yahoo.com/group/ukha_d/files/mharrison_avkit.jpg <http://groups.yahoo.com/group/ukha_d/files/mharrison_avkit.jpg>
> > as you explain!!!
James H
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