More tips from the cheap seats

Posted by: Andrew L. Weekes on 17 October 2002

This will be of interest to anyone with a CD3.5 / CD5 and an external PSU.

I've decided to get rid of the Flatcap 2, since I no longer use it, but am presently using the black SNAIC that came with it, in conjunction with a SNAPS supply.

Faced with the choice of spending over 50 quid on a new one to ship with the FC2, I wondered whether there were any other options that were cheaper.

The CD3.5 or CD5 only utilise the SNAIC to provide DC power to the analogue output stages of the players, and hence only 3 cores are needed. A quick experiment with an old grey SNAIC (with new connectors) and a SNAIC copy revealed the black SNAIC was much better.

The SNAIC cables, as pointed out by JV himself, are a compromise - for audio signals one generally wants low capacitance cable, for power one wants low impedance. Whilst not mutually exclusive properties, the physics and physical dimensions of the interconnect place constraints that require compromise.

What was needed then was a flexible low impedance cable, with untinned copper cores - a quick rummage through the ALW 'offcuts and bin-ends' box found some nice flexible 15A mains cable, with exactly the number of cores required.

15 minutes later and the innards of two 5pin DIN's had been hastily soldered to it, providing the 2x24V and 0V connections.

My goal was to achieve the same level of performance, but the signififcantly lower impedance of the cable makes a big difference and it sounds much better than a black SNAIC. The improvement in bass extension, punch and resolution is impressive for the 15 minutes of my time it took to make.

Whilst this is only applicable to these players (or possibly ONE of the SNAICS in a dual hicapped 82) it's worth a go for anyone competent enough to try it. I'd rate the difference as great as adding a better PSU to the player when used in conjunction with my exceptionally high performance SNAPS supplies.

The usual warnings apply - do it at your own risk etc, etc...

Enjoy,

Andy.
Posted on: 26 October 2002 by Mr.Tibbs
Ron,
Cable dressing never really got off the ground in the Tibbs household. I keep the snaics well away from the power and speaker leads and don’t do up the locking rings tight. These days I’m only interested in tweaks that can clearly be heard – OUTSIDE of the listening room.

“I haven't tried a good mod in a while and this one sounds right up my alley”

Good, and you’ll hear the difference right up your alley as well.


“except for making sure about the cable routing before soldering. BTW, do you tin the A5 or use a heat clamp? I use a 40 watt iron for A5, but isn't that too hot for the board tracks?”

At the hicap end, twist the cores together and tin them thoroughly. You then solder them to the star earth between the capacitors, with the joint in parallel to the link, for maximum contact area. You’ll need a hefty iron to solder this properly, I used an old fashioned heavy copper tip – the sort you pre-heat with a blow lamp.
What you do at the pre-amp end depends on what pre you are using. In my case (102), I brought the cable into the amp then under the full length of the main pcb, the cable was then brought back above the pcb and each core was soldered separately to the base of each of the two phono 0V pins.

Don’t forget to disconnect the 0V connection to the snaic din, inside the hicap!

Mr Tibbs
Posted on: 26 October 2002 by Andrew L. Weekes
Nothing new to you, since you're experiencing the subject matter first hand wink

A.
Posted on: 26 October 2002 by Milan
These are also available from RS Components, 4,5 pin and plugs/sockets. The Naim ones are made by PREH VERKHER and you can search the web site at www.rswww.com

RS will deliver very promptly but check the postal arangements, go for normal post as this will save you some money!

I have used the products and they are currently in my system.

Milan
Posted on: 27 October 2002 by king
In Singapore, only Farnell carries PREH VERKHER's DIN, they are a lot better than the cheaper ones in terms of handling, soldering and contacts.
Posted on: 07 January 2003 by Andrew L. Weekes
King,

The second o/p of a Flatcap 2, IIRC, is set to around 21-22V, and this is fine , so your supply is likely to be fine.

Try the lead too, I've not had a single negative comment from those that have tried it, most have rated it as the single most cost-effective upgrade they've made!

Andy.
Posted on: 07 January 2003 by Stevo
I'll second that. The custom SNAIC used between my CD5 and Hicap is really quite special. It's a night and day difference, and certainly not the sort of thing I'm accustomed to getting for a fiver.

Stephen.