I am an owner satisfied of an ER-4P black. Thanks

Nikongod, I changed electrolytics to 5600uF improving the phase distortion in low frequencies Well, I did some research ... both p and s drivers himself has impedance of 5 ohms. Added to this the cable (2 Ohms) and a resistor (20 Ohms to the p and 100 Ohms for the s). Thus, the total...

Thanks Erik by the suggestion. It is one very good project but I search something simpler with the expense of losing some audio quality. Even because most equipament that I am going to connect to that are not high fidelity.

Only shown single channel. At least simulating in spice it works. In the 1.7v led voltage occurs a hard clip but this is already a lot for the ER4P then the resistor is a voltage divider.Both eletrolitics act like a single bipolar And bypass cap is a film tipe for less distortion. Thanks!

Recently I bought an etymotic ER4P and would like to build a protection circuit to be able to use with generic equipament tv,radio... Should protect against DC-offset, transients and to transform the P for S because the phone is already very sensitive. Could anybody tell if this circuit would it...

http://sound.westhost.com/project109.htm

OK I discovered what happened. This Panasonic has one more terminal in plug for the remote control that works through resistance variation. what I did not know is that the signal that is constantly applied by cdp also has return by the audio channels. Doing the mensuration again with the turned...

Thanks Tangent. The phone continues working but I am afraid of have changed the sound. If this happened, I never am to to know because here in Brazil I do not have opportunity of testing and to compare good phones. HD280 I imported and cost very expensive here...and now it happens to me that...

Hi all I need help here. I had just bought a HD280 and when I connected he in Panasonic SL-SX420 and without turn on I started to hear some cracks in continued time's intervals. Being worried I decided measure DC offset with a simple multimeter digital. Without load, multimeter marked peaks of...

If no recommendation, I go with Clarostat 585 anyway, thanks

Hi all, I need advice in a reasonable stereo potentiometer. Size does not matter. should have in Newark and around of $4 OK, not audiofile at all Thanks

JensL, Thanks for posting some information on Philips SBC HP1000. It is pleasing to see me that this can somehow be compared to HD650. I live in Brazil then Is advantageous for I buy a Philips. Thanks

Thanks Tolovana. It is a honor for me your first post be to help me! I think I am going to look for for minors. Aiwa HP-v163 has the controllers of 13.5mm and to perhaps be best for me.

I have an earbud Philips who is about 17mm and is very uncomfortable for my ears. If someone knows the of Senn, help me.

About $150 If you find expensive knows that a Senn PX250 is sold by $270 here.