vvanrij
Headphoneus Supremus
- Joined
- Mar 23, 2008
- Posts
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That my NAD receiver's headphone out sounds almost the same, actually a little bit better, than my MKIVse. I hope that I'm wrong because I paid alot of money for the MKIVse.
Originally Posted by KonstantinT /img/forum/go_quote.gif Hi! Did anyone power high impedance headphones by a (vintage or modern) NAD preamplifier? I´m confused with the impedance matching and mismathing. I own a 20 years old NAD 3240PE integrated (speaker) amp with the well-known handicap: the phones out has a high impedance (220 Ohms). My Sennheiser HD565 have 150 Ohms. I think this impedance mismatch is the reason why it doesn´t sound better than the same phones connected to a portable CD-Player. |
Originally Posted by KonstantinT /img/forum/go_quote.gif When I´m home I mainly enjoy music at night using my headphones and I mainly hear vinyl discs. Therefore I think a preamplifier with a good phono input stage and a decent phones output would help to improve sound quality for small money and by the way saving energy when no speakers power is needed. In this case, I would use my 3240PE only on demand as a loudspeakers power amp (via its main in sockets). NAD offered a similar looking preamp named 1240. The phono stage has more features and better specs than the 3240PE´s one. And the headphones output has only 100 Ohms. Do you think it would improve the headphone sound, if I go for the 1240 preamp? |
Originally Posted by KonstantinT /img/forum/go_quote.gif I intend to get a Sennheiser HD650 later (when the ministry of finances allowes). It has 300 Ohms. If a change from the 3240PE´s 220 Ohm jack to the 1240´s 100 Ohms output improves the sound of the 150 Ohms HD565, shall I expect that it will result to the same improvement with a high impedance-headphone? Thanks in advance! Konstantin |
Originally Posted by scompton /img/forum/go_quote.gif I believe, from looking at the schematic, that my NAD 3155 has an headphone out impedance of 740 ohms. |
Originally Posted by tfarney /img/forum/go_quote.gif 740 sounds awfully high and I believe NAD's standard is 220 ohms. I'd check again. Tim |
Originally Posted by scompton /img/forum/go_quote.gif Does anyone know how to measure the headphone output impedance with a DMM? |
Just connect one probe to either left or right channel and another to ground. |