Hello, is it possible to have the manual of this fantastic amp?
I am particularly worried about the possibility of driving the 3.9e from my Aleph P1.7 preamp in balanced mode, because I have read that the xlr input impedance of the power amp is only 600 ohm while in the P1.7 manual it is recommended to keep the master volume in the position of least attenuation (where it has the highest output impedance!).
I can't find anything on the web........
Thanks,
Stefano
I am particularly worried about the possibility of driving the 3.9e from my Aleph P1.7 preamp in balanced mode, because I have read that the xlr input impedance of the power amp is only 600 ohm while in the P1.7 manual it is recommended to keep the master volume in the position of least attenuation (where it has the highest output impedance!).
I can't find anything on the web........
Thanks,
Stefano
Last edited:
Thanks but the Sa3 has not the balanced input, and now I've found the manual of 3.9e.
The real question is:
Is it possible to find an adjustment of the many controls of the Aleph 1.7 that lowers its output impedance to allow it to perfectly drive the 600 ohm input of the 3.9e?
Regards,
Stefano
The real question is:
Is it possible to find an adjustment of the many controls of the Aleph 1.7 that lowers its output impedance to allow it to perfectly drive the 600 ohm input of the 3.9e?
Regards,
Stefano
Appears that there is no problem with any load. An excerpt from the owner's manual:
"If you have a concern that the output impedance may be too high to properly drive the capacitance of a cable, keep in mind that that 1000 ohms still will allow bandwidth to 160 kHz into 1000 pF of capacitance. The maximum output impedance only occurs at the volume control maximum, and quickly goes to a low figure below the maximum level position. In typical operation, the output impedance will be between 100 and 300 ohms."
"The preamplifier will drive a low impedance load without alteration in the signal, in fact it can be used as a current source driving a 0 impedance mixer junction without any distortion."
"If you have a concern that the output impedance may be too high to properly drive the capacitance of a cable, keep in mind that that 1000 ohms still will allow bandwidth to 160 kHz into 1000 pF of capacitance. The maximum output impedance only occurs at the volume control maximum, and quickly goes to a low figure below the maximum level position. In typical operation, the output impedance will be between 100 and 300 ohms."
"The preamplifier will drive a low impedance load without alteration in the signal, in fact it can be used as a current source driving a 0 impedance mixer junction without any distortion."
Attachments
Yess, and then how to adjust the internal switches, the two gain controls and the master volume to keep the output impedance low?
I believe the lower the volume control setting, the lower the output impedance is.
None of the input level switching has any effect on the output impedance.
It only changes the gain by attenuating the input.
None of the input level switching has any effect on the output impedance.
It only changes the gain by attenuating the input.
Yes, but it can affect the position of the volume and so the output impedance, isn't so?
You can set all the gain switches for maximum gain, and then adjust the volume control as low as possible,
while still getting sufficient volume from the speakers. That will give the lowest output impedance.
However, no setting raises the distortion into 600 ohms. The settings only affect the gain.
The output impedance is only due to passive resistors, not due to the active circuit.
while still getting sufficient volume from the speakers. That will give the lowest output impedance.
However, no setting raises the distortion into 600 ohms. The settings only affect the gain.
The output impedance is only due to passive resistors, not due to the active circuit.
Last edited:
I also think it is perhaps the only solution even if the 1.7 manual says:
For maximum performance, the idea is to keep the Master control as clockwise as possible, and the Left and Right level controls as counterclockwise as possible.
For maximum performance, the idea is to keep the Master control as clockwise as possible, and the Left and Right level controls as counterclockwise as possible.
