Category Archives: Audio

Project: DSE K5408 Two-Channel Audio Camcorder Mixer Kit

A while back, I stumbled across a number of old Dick Smith kits being sold at the CCARC Wyong Field Day. I promised the seller that I would build the kits (eventually) and they might even make it onto the … Continue reading

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Tech Flashback: The CD+Graphics Format (CD+G)

I think by now, everyone knows I like to go on a salvage. This includes going regularly into thrift shops to see what’s new (or old) and what could be had for a reasonable price. This week had been rather … Continue reading

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Project: DIY More Tube-based Pre-Amp Kit (6J1 “Fever” Clone)

Ever since the vinyl “revival”, I’ve been bitten by a vintage audio bug of sorts. Of course, the old formats always come with their headaches and frustrations, but they also have a character and charm associated with them. One thing … Continue reading

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Tech Flashback: Anchor Automation Volksmodem 12

This weekend is turning out to be a bit of a telephony weekend, as I unpack more items from the stack of items donated by readers of the blog. This one is something I’m particularly fond of – the Anchor … Continue reading

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After the Beep: DSE F-8011 & ion by Telstra Digital Answering Machines

The humble voice call by telephone has been with us for many years, but with the popularity of land-lines fading, it seems that the traditional voice call may be headed towards obscurity. As a synchronous communication, it requires both caller … Continue reading

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Project: Generic 16-Tones Electronic Music Box Kit

Around a year ago, I went on a shopping spree for kits and ended up with a stash of them which I would attempt in my spare time. Chinese kits have all the fun of being relatively inexpensive, but also … Continue reading

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Project: The VOLMET Audio Gallery

Utility stations on HF are rather interesting to me and some readers may have seen my recent series on HF radiofax which is nearing its conclusion pending some more monitoring. But there are other types of utility stations out there, … Continue reading

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Failed, Teardown: Cowin E7 Pro Active Noise Cancelling Wireless Headphones

It looks like I haven’t been entirely fortunate with Cowin products. After the HE5A failed, I reverted to using the E7 Pro for my day-to-day commuting needs. Just this week, the E7 Pro failed as well, which doesn’t do much … Continue reading

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Weekend Project: MMA8451Q Accelerometer as a Microphone?

Last weekend was the Australia Day long weekend, so aside from chasing Shortwave Radiogram broadcasts and posting radiofax galleries, I also decided to build something I thought was rather interesting. In the past, I remember vaguely seeing articles about how … Continue reading

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Teardown: Cowin HE5A SportFree Active Noise Cancelling Wireless Bluetooth Earphones

It was only a few months ago in November I was reviewing the Cowin HE5A SportFree ANC Wireless Bluetooth Headphones. While I was generally satisfied with the compromises the package entailed, I did mention that the lack of protective casing … Continue reading

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Review: Cowin HE5A SportFree Active Noise Cancelling Wireless Bluetooth Earphones

Updated 26/01/2019 – see end of article for more details. With most new phones beginning to omit the headphone jack, most users have begun a mass migration to Bluetooth wireless audio solutions. Many of these are traditional headphones which are … Continue reading

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Tech Flashback: Landline Sounds & Telephone Teardowns

I’ve always been interesting in telephones and networks, but I’ve never really thought of becoming a telephone collector. Rather unexpectedly, through a process of not-throwing-things-out (it’s not hoarding, I swear!), I now have a few phones but not much to … Continue reading

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Review: Cowin E7 Pro Active Noise Cancelling Wireless Headphones

UPDATE (02/2019): Unfortunately, the review unit has failed due to a defect in the earcup hinge – see full teardown here. As a result, I no longer recommend this unit. For anyone who travels frequently on public transport or is … Continue reading

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Analysis: ‘TWICE – Likey’ Music Video

After a long 80-days overseas travelling in Singapore, Japan and Hong Kong, I’m back. In one piece too … although initially sans my luggage, but that’s since been resolved. Phew. However, things are not back to normal here, at least … Continue reading

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Review: Mixcder MS301 Bluetooth V4.2 Wireless Headset with aptX

Whenever I’m out and about, especially when commuting on public transport, I’m often listening to music or watching a video on my phone. Having a set of headphones over my head is my way of making the commute more bearable … Continue reading

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Project: THE (large) COLLECTION of V.34 Modem Sounds

After my posting of the definitive collection of V.90 modem sounds, a number of people got in touch with me with a few of them requesting the same to be done with V.34 connections. At first, I didn’t see the … Continue reading

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Teardown: RadioShack Amplified Telephone Earpiece (43-229)

After my experimentation in building a T-coil receiver on my own, it seemed that the unit did have some issues which I eventually corrected. While it seems the schematic may have been a victim of a transcription error, I thought … Continue reading

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Teardown: FiiO E5 Headphone Amplifier

The FiiO E5 was a low-cost but decent performing compact headphone amplifier a few years back. The unit bore a vague resemblance to an iPod Shuffle clip-version, and was relatively compact with integrated rechargeable lithium-polymer battery. Since someone didn’t want … Continue reading

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Project: Paeansonic CF210SP CD9088+CD7642 AM/FM Radio Kit

It’s been a bit quiet around here lately – I’m just swamped with work, and it never quite goes away, but neither does the desire to do something for my own enrichment and enjoyment … and the desire to blog … Continue reading

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Melb2016: DAB+ Scanning & Slideshow Images (Part 10)

In my last post scanning the airwaves in Melbourne, I commented on just how difficult it was to get acceptable FM reception in the hotel. As it turns out, the DAB+ digital radio signals were much easier to receive, and … Continue reading

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Project: THE DEFINITIVE COLLECTION of V.90/V.92 Modem Sounds

Just recently, there was a surge in traffic to my old legacy dial-up sounds pages. While I did my best with the equipment I had at the time to capture the sound of dial-up modems, I always knew that my … Continue reading

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Retired, Teardown: Uniden XSA660 Analog Cordless Phone

On the whole, the rapid pace of technology means that, inevitably, there will come a time when you will need to upgrade to newer devices. But some systems have stayed the same for so long, that sometimes they escape being … Continue reading

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Review: 1MORE Super Bass Earphones (EO303)

On this site, I’ve managed to review and test numerous 1More design products under the Xiaomi/Mi branding, but in this article, I will be reviewing a 1More branded product for the first time. The EO303 is also known as their … Continue reading

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Review: Meizu HD50 Hi-Fi On-Ear Headphones

When it comes to portable audio, users are increasingly enjoying their music on-the-go from portable music players and their mobile phones. While some of these products are bundled with included earbuds which seem to serve some people well enough, an … Continue reading

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Repair: Audio-Technica ATH-ANC9 Noise-Cancelling Headphone Ear Cushions

For someone who travels a lot on public transport, having a good set of noise cancelling headphones is indispensable for making the trip a lot more enjoyable and stress free. By shutting out the external noise with passive cancellation, and … Continue reading

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Review, Teardown: Xiaomi (Mi) Headphones (ZBW4189CN)

Xiaomi has impressed me time and again by bringing a variety of quality products in both functionality and design at prices which are extremely affordable. Ever since they introduced their first audiophile grade over-the-ears headphones, dubbed the Mi Headphones, I … Continue reading

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Review: Xiaomi (Mi) In-Ear Headphones Pro

Xiaomi (or Mi for short) have been on a roll, showing time and time again that you don’t need to pay much for quality, style and functionality. Their portfolio of electronics continues to grow, as does their brand presence, spreading … Continue reading

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Modification: Ausdom M06 Headset to Bluetooth Headphone Adapter

Having recently just reviewed the Ausdom M06, I decided it didn’t quite fit my needs as a headphone, but it had a perfectly adequate and capable Bluetooth chipset. As a result, I decided to embark on a short journey to … Continue reading

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Review, Teardown: Ausdom M06 Bluetooth Stereo Headset

To most, Ausdom is not a highly recognizable brand. In fact, it is another one of those Chinese Shenzhen-based companies with lofty ambitions, currently focused on headsets, speakers, surveillance and automotive accessories. Such companies are often operating in highly price-sensitive … Continue reading

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Tech Flashback: The Microcasette – Part 2: The Recorders

If I had just a bunch of tapes but nothing to use it with, it wouldn’t be that exciting. After all, the last thing I had (prior to this batch of donated gear) was a Computec branded single-tape answering machine … Continue reading

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