One of the main objectives of In-Ear Monitor measurement (as well as other audio equipment measurements) is to understand the correlation of the perceived sound quality with the numbers and graphs. I’ve been doing IEM measurement for a while now, just as a hobby, to learn how to correlate what I...

There seems no thread for Aurvana Trio yet, so I started one here. My review for Aurvana Trio: https://www.head-fi.org/showcase/creative-aurvana-trio.23003/reviews#review-20066 I personally like it a lot. To be honest, this is the first IEM in Aurvana line that I really like. Didn't really...

Tried these 'Iron Man Inspired' Acoustune HS1501 AL / HS1551 CU a while ago in Zeppelin Singapore. Couldn't find the dedicated thread for those models, so I start one to share impressions. http://acoustune.com/project/hs1501hs1551/ They are both have the smooth warm and bassy signature, but...

This post is the extended part of the review of iFi micro iDSD Black-Label posted here: http://www.head-fi.org/products/ifi-audio-micro-idsd/reviews/17934   Review Sections: Introduction, Summary, Pros, and Cons Sound Quality Features and Measurement     I wanted to post all of the...

Thanks to Brainwavz for the new Brainwavz B200 dual BA IEM! It is a wonderful new year gift from Brainwavz. Once again, many thanks to Brainwavz!   I received it a few days ago and only used it for a few hours by now due to the new year event. Short impression, it has a nice neutral tuning. I...

Tonality or frequency response is probably the first aspect that come to our mind when we evaluate audio gears such as earphones, headphones, and speakers. To accurately measure frequency response we need some skills, knowledge, and proper measurement tools. In most cases not a practical...

It was during last year (2014) Audio-Technica event in Singapore, that I had the opportunity to audition the AT-HA22TUBE headphone amplifier. Tested it with a few headphones, I was quite impressed with the sound signature. Few months later, I get a unit for myself. I've started drafting this...

Sections: Summary, Pros & Cons Headphone Output       Sound Quality& Comparisons       On-Off Popping Noise       Noise Floor & IEM       Low Level Signal Noise       Power Output & Output Impedance       Temperature       Channel Imbalance       RMAA Test of Headphone Output Line Output...

Hi!   I would like to report a problem on Sponsor Announcements and Deals forum front page. The character displayed on the main page has turned into Asian characters, not English. I use Chrome browser Version 42.0.2311.135 m. Other forums and pages are fine.   Thanks!  

Many thanks to Audio-Technica Singapore for the demo set loan of ATH-R70x! By the time i post this review, i have had it with me for more than a month.   http://www.audio-technica.com/cms/headphones/f39784ce643a82e6/index.html           Sections: Summary & Highlights Sound Quality...

      Sections: Introduction and Summary Sound Quality Op-Amp Rolling Control Panel Features & Measurements   Review of Creative E-MU XM7     Sound Blaster X7 is an impressive multi-platform, all-in-one solution for music, movie, and gaming. As a USB DAC, X7 works with most of...

Sneak peek of a pre-production unit of Audio-Technica AT-HA5050H               Sections: 1. Introduction, Pros & Cons, Summary. 2. Sound Quality & Pairings. 3. Comparisons. 4. Features & Measurements.       I consider myself fortunate for the chance to preview a pre-production...

Audio Technica Singapore informed me a while ago, about their new product launch event, at the end of this month.   They asked me to help them to distribute the invitation to Head-Fi'ers in Singapore, also for Head-Fi'ers from other country that happen to be in Singapore at that date. This is a...

  These 3 IEMs are some of the best IEMs I've ever heard, regardless of the price. I don't have any particular reason for comparing them, just happen to have them, so i thought to write some reviews and comparison for these 3 wonderful IEMs would be interesting.   Both DUNU DN-1000 and...

    Many Thanks to Audio Technica Singapore, for lending me the CKR9 & CKR10 IEM for review! I had them for about 2 weeks. Actually not long enough for me to do a very accurate review, but I will try my best    Audio Technica claims, that CKR series is the world's first IEM series to...

A very big THANKS to Audio Technica Singapore for lending me the whole 6 models of the relatively new Audio Technica Professional In-Ear Monitors, the IM series! http://www.audio-technica.com.sg/product_types/imseries/   (FYI, I’m not working for Audio Technica, or their affiliate.)    ...

I had a chance to briefly compared the HifiMeDiy Sabre USB DAC (UAE23) and AudioQuest DragonFly, both are USB DAC based on Sabre DAC.  UAE23 is using Sabre ES9023, as for the Dragonfly I'm not sure of the model of the Sabre DAC chip.   I bought the UAE23 in May 2013, and the Dragonfly I...

Earfonia PBA (Pseudo Balanced Amplifier) 2 channels, 3 channels, or 4 channels amplifier (balanced), how much improvement will we get by having more channels? I started a proof of concept project last year to test it. This project is not about making an amp to be compared with other amp...

I've posted this mini review in other forums, but since there is not many info about Superlux HD381 here, maybe this mini review can be usefull for the forum members here. FYI, I'm not Superlux dealer, distributor, or their company representative, and have no relation with them.  This is just...

I've searched google and DIY section here a few hours, but couldn't find the solution I'm looking for. I would like to build a headphones amplifier, with AC power, using dual voltage power supply, with 78xx/79xx or 317/337 combo (or other regulators). Will use Transformer with center tap...

I've been using ATH-M50 for about 2 years, mostly for listening music and a bit of sound editing for church recording. Recently I notice that I hear some crosstalk when I use test tone to test the left and right drivers. The test: - I generate test tone using Audacity (freeware), in this...