Welcome to Diy HiFi Supply

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As of April 6, 2009 we've moved to bigger premises : Customers are welcome to visit us at DIY Hifi Supply Ltd. Workshop 1, 8F, Wah Lai Industrial Center, 10-14 Kwei Tei Road, Shatin (Fotan), NT Hong Kong 1:00 to 6:00pm Monday to Friday.

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Universal Tube Stage

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I want to draw attention to the centre-piece of the EZ Linestage: the UTS (Universal Tube Stage) module.

It was designed as an EZ add-on output stage for a CD/DVD, allowing the removal of the most serious limitation in modern players: the opamps. The trick is to accomplish this without using a cathode follower or buffer, which has its own liabilities. The UTS output is taken from the anode; much of its good sound is attributable to allowing the anode to play its natural role

Coincidentally, the 0.5v > 2V gain needed by a CD player outputs suggests its application in a modern linestage - ergo the EZ linestage.

However if we series a pair of UTS and set the jumpers to highest gain we now have a state-of-the-art quiet phono stage, just needing a simple RIAA network in between.

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TNT EZ Linestage Review and Wishing I Was There...

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...in that winecellar.
Nick Whetstone of TNT,(one of the earliest webzines), has just posted a review of the EZ Linestage.
Read it here
Shop for it here

June 23 happenings

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Ultimate VC:

Quite a few have come through and listened and 100% unanimous: Ultimate VC = good sound!

I would characterize this as a very smooth, effortless sound, with no holding back.

On the Bench
our test equipment is 24bit/192khz. The Ultimate VC pushes our measurement abilities to the limit (JFET output into 10k load):
non-inverting phase
20hz - 80khz at -0.5db
THD: 0.007%
Dynamic range: 100.7 db
IMD + noise: 0.0076%

Our next step is to install the UTS in the same chassis together with the Ultimate VC

It sees everyone is ordering these with pre-drilled faceplates. I should have these in hand in 10 days.

UTS Phono stage:

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When is Ultimate Ever EZ?

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Now.

Check this out:
at the front we have the controls and the power supply. All the digital bits flow across those ribbons to selector (left), volume (right) and the audio signal board (chassis back).

The audio signal board uses end-to-end analogue potentiometers to adjust volume and vacuum silver relays to select source. The great thing is the audio signal board can be mounted beside the I/O jacks and the power supply can be put far away. This minimizes noise and maximizes musical fidelity.

Quiet it is. Next week I'll report some measurements.

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