how to power 10 pairs of headphones with the same signal?

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"Vedran" <vedran.vau@gmail.com> wrote in message
news7gvs6$v4s$1@ikar.hrt.hr...
> what amplifier(s) to use?
> other boxes/splitters?
> what headphones impedance to use?
> how to connect them?


Headphone amp box. Generally run to around 6 outputs. Required headphone
specs vary from unit to unit.

geoff

Archived from groups: rec.audio.pro (More info?)

"Vedran" wrote...
> what amplifier(s) to use?

Any decent amplifier that will drive speakers will handle
dozens of headphones.

> other boxes/splitters?

Buy or build? (the connection is very simple)

> what headphones impedance to use?

Generally much higher than speakers, so you can parallel many
of them.

> how to connect them?

Frequently, a "build-out"/"attenuation" resistor is used (~100
ohms) between the amplifier and the headphones. This allows
even more headphones to be connected. It also attenuates some
of the low-level "grunge" that many power amps have. You don't
hear it through the speakers unless you have your ear up against
the speaker.

Archived from groups: rec.audio.pro (More info?)

> Other manufacturers do similar units but the Behringer offers the best
> "bang for the buck"

Just be aware that on the Behringer boxes the signal degrades pretty
significantly as you move down the headphone outputs. The signal at
output #1 is okay, but the signal at output #4 is much weaker and
noisier in comparison. I've noticed this on two boxes that I've used.
YMMV.

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"will" <wpmusic@sio.midco.net> wrote:
>
> Just be aware that on the Behringer boxes the signal degrades pretty
> significantly as you move down the headphone outputs. The signal at
> output #1 is okay, but the signal at output #4 is much weaker and
> noisier in comparison. I've noticed this on two boxes that I've
> used.
> YMMV.



I've got a couple of Rane HC6 boxes and they don't exhibit that problem.
If the OP wants to use dedicated headphone amps, maybe they're a better
choice.

--
"It CAN'T be too loud... some of the red lights aren't even on yet!"
- Lorin David Schultz
in the control room
making even bad news sound good

(Remove spamblock to reply)

Archived from groups: rec.audio.pro (More info?)

"will" <wpmusic@sio.midco.net> wrote in message
news:1117547272.276904.58500@o13g2000cwo.googlegroups.com...
>> Other manufacturers do similar units but the Behringer offers the best
>> "bang for the buck"
>
> Just be aware that on the Behringer boxes the signal degrades pretty
> significantly as you move down the headphone outputs. The signal at
> output #1 is okay, but the signal at output #4 is much weaker and
> noisier in comparison. I've noticed this on two boxes that I've used.
> YMMV.

Is this not a multi-amp box with each amp being driven off the same signal ?
If so, then either the user has a vivid imagination, or the power supply
and/or routing in the unit is incredibly flawed.

geoff

Archived from groups: rec.audio.pro (More info?)

On 6/1/05 6:21 PM, in article 8yqne.10742$Vm4.863@trnddc01, "David Morgan
(MAMS)" <mams@NOSPAm-a-m-s.com> wrote:

>
> "Lorin David Schultz" <Lorin@DAMNSPAM!v5v.ca> wrote in message
> news:St1ne.26078$on1.17485@clgrps13...
>> "will" <wpmusic@sio.midco.net> wrote:
>>>
>>> Just be aware that on the Behringer boxes the signal degrades pretty
>>> significantly as you move down the headphone outputs. The signal at
>>> output #1 is okay, but the signal at output #4 is much weaker and
>>> noisier in comparison. I've noticed this on two boxes that I've
>>> used.
>>> YMMV.
>>
>>
>>
>> I've got a couple of Rane HC6 boxes and they don't exhibit that problem.
>> If the OP wants to use dedicated headphone amps, maybe they're a better
>> choice.
>>
>> --
>> "It CAN'T be too loud... some of the red lights aren't even on yet!"
>> - Lorin David Schultz
>> in the control room
>> making even bad news sound good
>>
>> (Remove spamblock to reply)
>
>
> Any old power amp will drive the Furman HR-2 (dual stereo jack) stations
> which can be daisy chained almost to infinity. I've noticed no signal loss
> when driving up to ten of these boxes, daisychained, and loaded with 80 to
> 600 ohms per jack.

Does anybody make a version of this sort of thing that incorporates a
L-mono
R-mono
L+R mono
Switch?