So THAT'S What It Is Supposed to Sound Like!!!

Posted by: Greg Beatty on 10 June 2003

Had some free time with the kit this weekend (rare these days with four-month old in the house) and did four things:

1) Tracked down and corrected an earth loop. The LP12 would buzzzz with the ground wire disconnected and hummmm with it connected. I unplugged and unhooked the cable/tele connections and the LP12 was SILENT when the ground wire was reconnected. I inserted a RadioShack ground loop isolator thingy between the tele audio out and the Nait 5 - viola! No more problems with the LP12.

Records, and everythings else, improved as a result.

Note: If you don't have a turntable to use as a Ground Loop Detector and you have a tele hooked up to your hi-fi, you just may have a ground loop and not know it. The other inputs/kit did NOT buzz or anything with the ground loop but ALL sources were improved when the loop was removed. More dynamic and "makes more sense" all round.

2) Ditched the Monster PowerBar 1100 in favor of a Wiremold strip. I compared the two using just the Nait and my Sony ES series CD player and the Wiremold won hands down. This was not the case with the ProAc Response 2's, which benefited from the added smoothness of the Monster, but the Allaes reveal the Monster to squish the dynamics and just make everything less interesting.

3) Uncoiled the NACA 5 and wrapped the excess 'S' style. Jeepers Mr. Wilson, this is fun! Whada difference!!! Really opened things up.

4) Add a touch of compliance under the Nait 5 and between the Nait 5 and the VCR siting on top of it. Yup - the Nait does not like my VCR sitting on it apparently but adding compliance between the Nait and VCR mostly mitigates the negative effect.

The cumulative effect of these four changes was a laugher. The system has a much more even tonal balance and sounds way more 'real'. The sound opened up and is HUGE now. My wife put on one of her classical CDs and Oh-My-Gawd - I have never heard my system sound like this with CD.

What these changes didn't fix is the A-Musical nature of my Sony CD player. I had a seller bring a CD5 round last week and only had it in the system for an hour. But I couldn't listen to the Sony for three days afterwards. It just sounded musically broken Frown The effect has worn off but has not been forgotten. I passed on the CD5 due to the case being bent and having a non-Naim power cord with it.

The changes almost make me have buyer's remorse over the 2nd-hand FlatCap 2 I just ordered - I'm not sure I need it. But I can't wait for it to arrive Wink

- GregB

Insert Witty Signature Line Here
Posted on: 10 June 2003 by Frank Abela
Greg

This may seem a stupid question but where did you pick up the "RadioShack ground loop isolator thingy"?

Regards,
Frank.
All opinions are my own and do not reflect the opinion of any organisations I work for, except where this is stated explicitly.
Posted on: 10 June 2003 by Greg Beatty
...RadioShack of course Wink

Here's the link:

http://www.radioshack.com/searchplus.asp?type=ALL&find=ground+loop&pagetype=toggle

I don't know if they have RadioShacks in the UK. Maplins may have it???

Its been written about on the forum before and works a treat. The tele already sounds bandwidth limited anyway, so the degradation to it by using the isolator as an interconnect is Insignificant Compared to the Power of the Force. Opps, sorry - but you get the idea.

- GregB

Insert Witty Signature Line Here
Posted on: 10 June 2003 by prowla
I think we used to have Radio Shacks (Tandy), but Carphone Warehouse took over all the shops.
Posted on: 10 June 2003 by Manu
Greg,

Try to power your VCR from an other wall socket, never on the Wiremold; it has a switching power supply degrading your mains. And place it as far as you can from your audio gears and cables; it has a plastic, unshielded case.

Emmanuel

All opinions are my own, and reflect those of the organisation i work for, even if not stipulated.
Posted on: 11 June 2003 by Frank Abela
Thanks Greg. I guess I'll have a look in Maplins. My system suffers a bit from hum through the phono stage and it would be good to isolate the ground loop since I know it's not the phono stage which is humming per se.

Regards,
Frank.
All opinions are my own and do not reflect the opinion of any organisations I work for, except where this is stated explicitly.
Posted on: 11 June 2003 by domfjbrown
Can these earth loop isolators work between a DD/DTS/DPL processor and an amp?

I only have terrestrial via an aerial, but have all my AV sources running into a Yamaha E800 processor, then on to the amp in the standard stereo rig. I don't get hum on the tt, but I'm still convinced I have an earth loop - I used to when the rig (with the older E492 processor - now deceased) was in my old flat, avec NTL analog cable.

Will Radio Shack ship to the UK? I can't find these anywhere and Maplin don't know what I'm on (about) when I go in there!

When the music's over turn out the lights
Posted on: 11 June 2003 by David Stewart
Frank/Dom,
Maplin have a similar product but they call it a High Quality Isolation/Noise Suppressor (part code in their Cat. RZ96E) @ £14.99

If you do a Google on Ground Loop Isolator you'll also find two other UK based suppliers (Cyberkit & Nifty-Gadgets) who supply equivalent products.

David

"Beauty is in the eye of the Beer-holder"
Posted on: 11 June 2003 by Greg Beatty
Dave -

Thanx for the tip on using the mains from the dryer. Given the layout of our townhouse, I think its dang near impossible to do this. Great idea though.


Graham -

Compliance in this context is a doubled-over, thick washcloth. I'm still not sure about this compliance thing - the Fraim is non-compliant. It may be that, with my kit situated on top of a large television, that the compliance helps were it wouldn't on a dedicated stand.

Emmanuel -

VCR's have switching power supplies? Really??? Mine is a 7 year old or so JVC. Do they all have these 'evil' supplies? What about DVD players?

I will try your suggestion and move the plug and rearrange to move the VCR away.

Domfjbrown -

Don't know about RadioShack and UK shipping. It looks like David has addressed this by finding it in Maplins and by finding other UK suppliers.

- GregB

Insert Witty Signature Line Here