Comply doesn't list this earphone or inner diameters for their tips so I cant work out which tip to buy. :( Neug

Hi, I recently came into possession of a JDS Labs O2 Amp. In order to replace the Fiio E17 DAC/Amp I've been using instead of terrible laptop sound, I needed a DAC, so I've ordered a USB version OL DAC. And some modest IEMs, a pair of RE-400s and Philips TX2's. I'm also looking to buy a single...

Hi guys, I've had the E17 for a couple weeks now. Pretty happy with it thou i hear it sounds a bit better using optical in, so im getting a USB to SPD/IF device.   One thing that ive noticed is that generating a full digital range sine wave into it leads to some distortion. At first i though...

Lecture on Decay of oscillations.   Neug

I'm calculating 2.2*Qtc/fc. The speaker in a closed box has a Q and resonant frequency so it should have a decay time. Maybe reverberation time is the wrong word.   Cheers              Neug

Thanks for the corrections. Post edited. I'm not familiar with a lot of the terms of acoustics. Yes it's reverberation decay, exactly (mathematically). Neug

Hi sound science, I've been trying to get my head around damping. So i decided to make a spreadsheet to tell me how much source resistance increases the reverberation decay time of a signal at system resonance. I used a closed box model (is this ok for open headphones?) to get the Qtc of a...

I went and bought a Fiio E17 because it seemed to tick all the boxes for me. Bass on it is well controlled even on Beyerdynamic Custom Pro One  (switch position 4) headphones. It drives the UE600's superbly. Measurements showed ~0.05 ohm output impedance (Measure at 0.2V OC 1Khz). Really happy...

I decided to measure the output impedance of the IDT, X-FI and Iphone 3GS.   The IDT measured 30.9 Ohms. The X-Fi was at least 40 Ohms (Creative said 33 Ohms). The Iphone measured 2.1 Ohms.   Looks like the IDT and X-Fi are approximately impedance matched to 33 Ohm headphones, the aim being...

Hi,   This is my first post. My UE 4 SuperFi's gave up the ghost about two years ago. Since then i've been using cheap ear phones, but finally disappointed with their quality I bought some UE600's recently. I am really happy with them, especially on the iPhone 3GS were they seem to have...