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banjoman
25-04-2016, 20:07
After a long stint of being content with my 2M Black - Croft 25R phono pairing, I've had an itch to try different MC phono stages and carts over the last several months.

Been through quite a few phono stages till I tried Jez's (Arkless) excellent hybrid MC phono stage. It was excellent and realised it shared a lot of characteristics with the Croft 25R phono which I love.
I've tried a few SUTs over the years with the Croft and Benz Wood SL - Audio Note S1, Puresound T10, Bob's Devices cinemag - with mixed results. There was always some problem or the other - a hum or sub optimal loading or something else.

Had always assumed that a head amp would be a worse solution than a SUT due to noise issues, but decided to give the Firebottle and Arkless head amp demo units a go.

I am quite pleasantly surprised with the results so far - they are both very good indeed - completely silent and very well balanced, while giving me the right amount of gain with my Benz Wood cart.

Both the Firebottle and Arkless are very close to each other in performance - there's not that much between them.

However, the Firebottle had a 100 ohm loading compared to 270 ohm for the Arkless. I've always found the Benz a bit dull at 100 ohms and typically needed 400/500 ohms at least to liven things up.
The Arkless sounded a bit more dynamic and punchy with better treble extension - which could well be due to the loading or something else...
It also had a tad more gain than the Firebottle.

The Firebottle was well balanced even at the fixed 100 ohm load which is know is not ideal for the Benz - unfortunately the demo units did not allow variable loadings to experiment with.

Overall, I am well impressed with both head amps, and in my system, I did prefer the Arkless by a small margin.
I'd imagine with higher loading options, both would sound better with the Benz

For the £150 price point, they are both excellent options and I'd imagine the higher end £300 Arkless head amp option would be excellent.
Strongly recommend anyone considering MC head amps to give em a go

Firebottle
26-04-2016, 05:58
Thanks for giving the head amp a run Deba but I'd like to clarify that the unit you trialed is just a demonstrator, as you said.

The production version is this:

Long battery life MC head amp:

http://i601.photobucket.com/albums/tt97/Paramotorpilot/2000%20MC%20Head%20Amp/P1050350.jpg

Specifications:

Battery life: 2000 hours

Battery: 3LR12 alkaline 4.5V

Input impedance: 1000 ohms default. Cartridge loading can be altered with suitable loading plugs.
100 ohms loading plugs supplied, or custom value by request.

Gain: 24 dB (x16) standard or 31 dB (x35) for low output.

Output impedance: Less than 200 ohms



http://i601.photobucket.com/albums/tt97/Paramotorpilot/2000%20MC%20Head%20Amp/P1050349.jpg


http://i601.photobucket.com/albums/tt97/Paramotorpilot/2000%20MC%20Head%20Amp/P1050348.jpg


£150 delivered. :)


Or the connoisseur version with audiophile quality tin foil polypropylene output capacitors, necessitating a larger case,

£200 delivered.

banjoman
26-04-2016, 08:10
Thanks Alan

The choice of gain and loading is great - I've realised that I would need that. I believe Jez offers loading options and rechargeable battery options as well.

In addition to the flexibility and the long battery life, are there any sonic differences between the demo unit and your production version?

Arkless Electronics
26-04-2016, 10:20
Interesting review Deba! Glad you like it :)

Anyone else want to try this head amp after Deba?

My £300 model features gold plated good quality sockets including provision for loading plugs, nice metal case, rechargeable batteries with automatic constant trickle charge when power is off (nickel metal hydride rechargeable should give a big boost to the sound).