I am making one amplifier for my headphones
Intention is to make a P3A with low voltage and high bias
willing to install this amp in the rack , run a cable for 2 ch next to my couch which is about 7-10 meters
then construct a local box with the plug a passive attenuator of 2W-5W in order to be able to control the volume localy
so in the output of the amplifier which originally is specified for 8 R and speakers i will feed :
--the 10 meter cable
--A set of resistors for headphone attenuation Expect 220R /2W in series and something may be in parallel ( advise needed )
--100 R 2-5 W potensiometer
--set of headphones 32 R
I was thinking may be a local Zobel
Do you expect an stability issues with that configuration ?
Is there anything else to treat my output with ?
thank you
Intention is to make a P3A with low voltage and high bias
willing to install this amp in the rack , run a cable for 2 ch next to my couch which is about 7-10 meters
then construct a local box with the plug a passive attenuator of 2W-5W in order to be able to control the volume localy
so in the output of the amplifier which originally is specified for 8 R and speakers i will feed :
--the 10 meter cable
--A set of resistors for headphone attenuation Expect 220R /2W in series and something may be in parallel ( advise needed )
--100 R 2-5 W potensiometer
--set of headphones 32 R
I was thinking may be a local Zobel
Do you expect an stability issues with that configuration ?
Is there anything else to treat my output with ?
thank you
IMHO I don't think you need a zobel in the couch-end. If you have a resistor network for attenuation, that will take care of the 'termination' of the line. I think a zobel could be useful at the amp output.
This means there should be a parallel resistor in the couch end (divider).
This means there should be a parallel resistor in the couch end (divider).
Last edited:
In-line pots for loudspeakers are readely available, ranging from 4 to 16 or 32Ω. These are double-gang so the amp 'sees' a constant (most) ohmic load. They're in stereo too, but more expensive. I use these (twin mono) to attenuate the dynamic low speakers of my Final electrostatics. Roughly 50W per pot, serious guys. You can find them in the professional audio suppliers stores.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.