A/V reciever help, subwoofer out
Fozzie da Bear
has a subwoofer output. I have seen the Harmon K AV 30, which is nice, but
only 50 Watts across the front 3. I like the Sony ES 880, and similar models
buy want to use a Validyne Sub with my system and have know Idea how I would
do this. If you have any ideas/suggestions on recvievers or hooking the sub
to the reciever without sub outputs please let me know. Thanks
Fozzie
Cal Lott
Why do you want a receiver, Fozzie? For $800-$1200 you could
get some seperates that would beat the pants off of a receiver in terms
of sound quality. Try looking at components from Parasound, Adcom, and
B&K.
In any case, I think that Yamaha and Denon make the best A/V
receivers, if that is the route you need to go. I have not heard an
Onkyo, but I hear that they also make well-regarded stuff.
Most Velodyne subs have line level inputs and outputs that go
to their crossover. If you were using the sub out on a receiver or
surround processor, you would simply feed the output to the Velodyne
(with the crossover set at 110Hz or whatever the highest frequency is)
and ignore the sub outs. You don't need to use the sub crossover if
the processor is doing the work for you.
Regards,
-Cal
--
----------------------------------------------------------------------
"From all us Slackers to all you Boomers ... HAHAHAHAHAHA! WE HAVE
SATELLITE MOUNTED RAIL-GUNS! HEH HEH. Who's laughing now?"-- S. Lang
----------------------------------------------------------------------
Sergio Cafarelli
I have a Yamaha RX-V870. It delivers 85W x 3 and 25W Rear. It also has a subwoffer output.
I also own a velodyne F-1200 which i hook up to the mono subwoofer output. If you have
a Velodyne, the owners manual suggest that instead of using this output line, you should
connect your speakers and sub-woofer like satellites; that is, feed the speakers out from
receiver to subwoofer, and from sub-woofer go to speakers. This is supposed to give
you better response ( I have not tested this yet!).
The Yamaha goes for about $850.00. The RX-V1070 (?) delivers more power nad has some more
gizmos and costs $1100.00. It's up to you but you might want to check'em out
Serge
se...@ll.mit.edu
Mike Klein
concluded that I was going to have to do the subwoofer crossover
myself. Denon AVR-2000 (which I own) for example has no subwoofer
output at all; there's a "mono" out which simply sums the three front
channels but does not high-pass them in any way.
The Yamaha RX-850 does have a low-passed subwoofer out (don't know the
specifics), but at 200Hz, and no other channels are high-passed. I
think the subwoofer out is first summed from the R and L fronts.
I believe the high-end ProLogic receivers (separates) do the right
thing -- but the overall price of such a system is way out of my budget
(~$2500 for the electronics alone).
My solution is to modify the Denon receiver to insert three real
crossovers in the L, R, and C signal paths (HP and LP outputs, 4th
order L-R), sum the LP fronts for the subwoofer, and high-pass the
three fronts before returning the signals to the power amps. Buy your
own crossovers (I got mine from Marchand), and you select the
frequency. I chose 125Hz since the L, R, and C are 6 1/2" satellites
that roll off at 90Hz in a sealed box config, and because the subwoofer
will be placed off to one side so I was concerned about phase problems
due to path length differences of 6 feet or more. 100Hz might be even
better but it's easy to change with the Marchand crossovers but it
seems good to keep the xover freq high after reading Dick's postings on
spectral distributions of energy in music.
-Mike
---
Mike Klein {wherever}!sun!klein || mike....@Eng.Sun.COM
Sun Microsystems, Inc. Mountain View, CA
W. David Higgins
> [...] Denon AVR-2000 (which I own) for example has no subwoofer
>output at all; there's a "mono" out which simply sums the three front
>channels but does not high-pass them in any way.
Eh? Wouldn't a 'mono' output be the same as a line-level version
of the center channel, (i.e. a L+R sum)? In any case, feeding that into
a line-level low-pass filter seems to be a reasonable thing to do.
LEO LEONG
I happen to use a Denon AVC-3000 component amp (prologic, etc.) which also has a 'mono' output. However, it also has a line level 'center' output right next to the 'mono' connector. I suppose they must serve quite different purposes. I have never actually tried connecting anything to these sockets, and so will not know how different they actually are. The user's manual also did not say anything about the 'mono' output, although it indicates that the 'centre' is the line level 'centre channel'.
Maybe someone out there can enlighten us.
Leo Leong
Adaptive Signal Processing Lab
Dept of E & E Engineering
The University of Western Australia
Nedlands
WA 6009
AUSTRALIA
email: le...@ee.uwa.edu.au
Mike Klein
>w...@grouper.mkt.csd.harris.com (W. David Higgins) writes:
>
>I happen to use a Denon AVC-3000 component amp (prologic, etc.) which also has a 'mono' output. However, it also has a line level 'center' output right next to the 'mono' connector. I suppose they must serve quite different purposes. I have never actually tried connecting anything to these sockets, and so will not know how different they actually are. The user's manual also did not say anything about the 'mono' output, although it indicates that the 'centre' is the line level 'centre channel'.
If it's like the AVR-2000 (for which I have a service manual with
schematics), the center channel "line out" is simply the center channel
speaker output divided down with a resistor divider. It is not a
preamp output.
The mono output is also "line level" in the same way, but the resistor
divider becomes a 3-way sum of the three front speaker outputs.
And yes, definitely they are different signals. Mono != center, for
ProLogic. I would need somebody else to explain the details of the
algorithm.