On Wednesday, July 26, 2017 at 2:42:58 PM UTC+2, Peter Wieck wrote:
You are entirely missing the point. There is no shame in this, perhaps I =
was not clear in the description, so I will try again.
=20
a) Bass is omnidirectional below ~500 Hz. What this means is that even a =
"7.1" system does not need bass at all seven speakers.=20
b) A standard stereo system typically delivers full range signal to both =
the left and right speakers.=20
c) A sub-woofer system will use either an electronic crossover-&-blend sy=
stem - not cheap - or a dual-voice-coil driver. The dual-voice-coil driver =
is considerably less costly than an electronic option.=20
d) Some systems, even from far back in the day, had center-channel output=
s from either amplifiers or receivers to accommodate early stereo recording=
s that greatly exaggerated separation, or for individuals who wanted a wide=
sound-stage and needed center channel reinforcement.=20
e) Such a system will also deliver full-range signal to the center channe=
l.=20
f) Many multi-channel (AKA Surround Sound) suffer from too wide a speaker=
separation, most especially as they tend to use tiny little speakers with =
tiny little drivers.=20
g) With that in mind, a three-voice-coil driver is a standard, relatively=
low-cost, device to provide sufficient bass for a multi-speaker surround s=
ound system.=20
=20
To your point - the internal crossover does take all the '200 Hz' signal =
and direct it to the sub-woofer. But there need not be any fancy blend circ=
uitry as would be required for a single-voice-coil driver.=20
=20
Against your point - you do not need to deliver any bass to any of the pe=
ripheral speakers, at all. A single point-source for bass is sufficient for=
the need, and the entire purpose of any sub-woofer.=20
=20
And, a general observation: surround sound systems are similar in applica=
tion to vehicular sound systems. When typically deployed for movies or list=
ening when driving, fidelity is simply not possible nor the goal. The goal =
is to create an environment. Between action on the screen, road and wind no=
ise, whatever, again, there is no such thing as fidelity despite much blath=
er to the contrary.=20
=20
Peter Wieck
Melrose Park, PA
All the outputs from the soundblaster (3 wires from soundblaster split into=
8 towards the receiver) and plugged into the denon 1909 receiver.
The denon 1909 receiver is probably capable of stripping of all the frequen=
cies below a certain threshold and is probably capable of forwarding this t=
o the subwoofer or even better to an intermediate amplifier which forwards =
it to the subwoofer.
From what you wrote it seems the three voice coil design might have been a =
cheap way to mimic what a receiver does. Now that a real receiver is in pla=
y, would it still be necessary to power all three voice coils ? Could that =
be a problem somehow or does it not matter ?
I would guess that if only one voice coil was powered that that would be in=
sufficient and the device would be underpowered and not operating well.
The only thing which might be special about gigaworks electronics is that i=
t maybe had a higher cross over frequencies than usual, but perhaps that's =
just my fantasy
Other possibilities include special subwoofer audio processing but probably=
not...
Bye,
Skybuck.