onsdag 26. mars 2014

DIY Powercable

I have some cables that are store-bought. They do the job until I get around to roll my own.
I am quite fond of "audiophile-grade cables". Meaning they need to have high quality material and they must look good. And not cost the equivalent of a nations Gross Domestic Product. Which is often the case in the world of hi-end folly.

For this project (and all my power-cable efforts from this day) is made of the Supra LoRad cable.
A brilliant cable with a semi-conductive shield. The LoRad 2.5 used here is the thicker of the two, meant for heavier power duty (amplifiers) and it's little sister the LoRad 1.5 for lighter duty (pre-amps).


LoRad is short for Low Radiation.





Tech:
3x 2.5mm sq. cores of tin-plated multi-stranded OFC cable
External Diameter: 11.0mm
Brown (Live), Blue (Neutral) and Green/Yellow (Earth) coloured insulation jackets.
Semi-conductive earth insulation - no drain wires !!
High quality 99.99% coverage foil screen
Highly flexible outer insulation (easily passed CE-regulation 2x 30,000x "bends" test !!)
Approx. 16A rating (@ 230V)




I also like the fact that it's Scandinavian. For this project I chose a nice polyester mesh braid for visual appeal. I also had some chinese plugs that are fake Oyaides. I thought they looked allright and that the
quality really couldn't be that bad.
They went straight into the trash. The screws were horrible quality and I ruined them trying to tighten them. The plastic housing also look and feel cheap. I have tried these three times with only one partial success, so now I will get some Supra plugs instead.

The blue and grey will go nicely with the Supra connectors


*More to follow*


tirsdag 25. mars 2014

Review: Philips Fidelio M1



This is my first attempt at a review, so if you make it to the bottom: Heres to you!


Philips latest headphone line is better summed up in one word: Awesome.
Sleek industrial design, modern indeed, yet classic and timeless. I thought of Grado (SR60-SR125), only not sort of cheap-looking.  Stitches that contrast nicely in orange on black. Orange cloth-covered detachable chord. Aluminum cups with discreet lettering and memory foam pads. They look the price, for sure.

I feel a disclaimer is in order. This is not a professional review, nor has it been done using multithousand whatever currency gear. The Fidelio M1 are portable headphones. And as such, I have reviewed them the way I use them. On the go with my phone ( HTC One S) as source. Sometimes at home using an Objective 2 amplifier, but mostly not.

They sing stronger when amped properly, but thats hardly a surprise. They play with better control at lower volumes when amped. More slam and drive. Or better (Buzzword-alert) PRAT - pace rhythm and timing. Also way louder. I usually have the volume set three-four clicks down from full at normal out and about listening level, and I could use some smaller increments in the attenuation, but it's a phone not an amplifier with an intergrated stepped attenuator. They do fine anyway. If you don't mind carrying around a small portable amp, they do sound alot better, more open and less recessed. Mind you, the amp have to be a good one. I tried with the Fiio E5 and this amplfier coloured the sound, gave it fuller lower end, but tamed everything else to much for my ears and made the sound less enjoyable than straight from my phone.
The O2 is a clean, transparent alternative. Allthough not very portable. If I may be so bold as to use a cheap analogy: Comparing this headset to itself, with and without amplification is like comparing cheap burboun to a 12 year old Highland Park.




Deep musical bass (could go a tad deeper). Rather good for a supra aural earspeaker. So is noise suppression. I can play wicked loud before anyone close by can hear anything. And they cancel outside noise pretty good too. I take the bus to work and have yet to be noticably bothered by sounds from the outside world.

They are slightly warmer than neutral, and that suits me fine. Neutral, I often percieve as flat and lifeless. I don't need headphones made for critical listening when I am on the move.

An excellent treble sparkles like a velvet diamond and you don't have to turn down the volume when they go loud, but here some adjustment is needed every once in a while. Still, it sounds good. Very good. Imaging is detailed and the sound stage is wide and deep. Dynamics is not the strongest selling point. It's there but I could do with more.Instead they make up for it in balance.

They are a bit tight. I wear them for an hour before I need a break. The headband could be softer as it feels quite hard on the skull after awhile. Again I remember the Grados. Same issues with comfort, only the Fidelios are luxory Grados, comfort-wise. Sound wise it would be like comparing apples to oranges.
I love Grados to, so don't think I am bashing them. Grados are awesome cans for rock and unplugged stuff.

For about 1400,- (Norwegian Kroner) or about 250,- USD they have nothing to be ashamed about. But Philips, if you read this, please make the headband softer underneath and make them a bit less snug. And then give me a new pair because this is my go-2 on the move earspeaker.

They do sound abit recessed. Again, less so when driven by the O2. No big deal. I don't need perfect cans on the move. I need comfortable enough, sturdy built, goodlooking headphones that can deliver impressive sound. And they do sound impressive. They impressed me, anyway. And they look really cool.
I haven't seen anyone else flagging the M1 ship hereabouts, yet. Such a shame these live in the shadow of Beats By Dre (to name only one) and other "star-designed"  fads.


I like my M1's so much that I am willing to pay 2.5k for the X1 to use at home with my Sapphire headphone amp ( a work in progress) without having heard them first. But if they had been just a bit more expensive, there are other options to consider. I don't care though, theese are the ones for me.



Link to product page: http://www.philips.co.uk/c-p/M1BO_00/fidelio-orange

Specs: http://www.philips.co.uk/c-p/M1BO_00/fidelio-orange/specifications

Additional note: Take this for what it is. The review of an audio amateur whose passion for sound is a never ending journey through trial and error. And hopefully, some success.
Thank you for reading.

Kenneth Rørås

mandag 24. mars 2014

Sapphire Headphone Amplifier

RJM Audio provided me with the parts kit to populate the stereo channels. A nice Version 2.0 introductory price @ 100 USD shipped from Kyoto is a sweet deal to boot. I still need to get some nice caps for C1, and the powersupply needs another toroid and rectefier bridge. I am really looking forward to hear it sing, but for now, I am just having fun building it.
Richard Murdey (RJM Audio) also happens to be a very knowing and helpful guy, so anyone inclined to build a headphone amplifier (or an MM/MC phonostage) should check out www.phonoclone.com



I like the blue capacitors on the black pcb. Looks cool :)
C1 is not soldered yet, I am ordering some Dynamicaps for this one, or maybe Russion NOS PIO.

I decided to put in the caps Richard sent with the kit, try'em out for while. Then later on I'll replace them with better ones and celebrate the difference. I've decided on a custom transformer from www.toroidy.p
I can get a 50va 4x12 for 50 euro shipped.



Before I can get anything else done, I need to go out and buy a multitool for cutting the square hole for the inlet module. The tool costs less than ordering a single panel from Front Panel Express and since I allready need to order with them for the frontpanel, I can make the rear myself. More DIY fun :)


Also I need this tool for my next amplifier aswell.

*More To Come*

fredag 21. mars 2014

Welcome



Hello. Welcome to my personal DIY Audio pages.
I hope you find it worthwile.


I reside in the town once known as Nidrosia, Norway. Where the descendants of Vikings wear shorts and t-shirts midwinter. Where a beer costs the equivalent of 8 US bucks in the pub and the women can easily be bedded without dating. But that's for other folk. I am happily engaged to my lovely muse.

New to DIY Audio, I haven't built a whole lot, but I love the way I gain more and more understanding of how this works. We can shape the sound to suit our tastes. We can build stuff and enjoy the sound of components that would cost a month's salary for a tenth of the cost of commercial brands. What's not to love?


Kenneth