Headphone output impedance

Headphone output impedance
« on: August 02, 2023, 01:00:01 AM »
Hello everyone,

just got my P5 r4 and I have no words - I am just happy and in wonderland.

But one question I have in regards the phones output. Does enyone know what impedance the HP amp in the P5 has?

My old trusty HD-25 have clipping if I go over 2 on the Vol knob.

Many thanks in advance.

EDIT: I also tried other HPs (all under 50 ohm) and the do the same.
« Last Edit: August 02, 2023, 01:11:28 AM by waxdoctor »

Re: Headphone output impedance
« Reply #1 on: August 02, 2023, 02:34:51 AM »
Hello everyone,

just got my P5 r4 and I have no words - I am just happy and in wonderland.

But one question I have in regards the phones output. Does enyone know what impedance the HP amp in the P5 has?

My old trusty HD-25 have clipping if I go over 2 on the Vol knob.

Many thanks in advance.

EDIT: I also tried other HPs (all under 50 ohm) and the do the same.

just found a post about it on gearspace:
---
From looking at the components on the board:

Audio out: 600 ohms
Headphone out: 100 ohms
---

That I guess explains why my HPs with lower ohm do clip - even the HD which has 70 ohm...

g3o2

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Re: Headphone output impedance
« Reply #2 on: August 03, 2023, 08:10:29 AM »
Nice find! Iíve always wondered the same with a pair of Sony MDR 7506 (60 ohm)