Jlh '69 vs Gainclone or Hiraga - diyAudio
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Old 29th March 2005, 08:06 PM   #1
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Default Jlh '69 vs Gainclone or Hiraga

Hai Guys,

I have a pair of Dynaudio Nuance Speakers (look at the picture) these are 86db/w 4ohm and i drive them with a John Linsley Hood '69 10watt. But i want build something beter than that, is a Gainclone or a Hiraga 20watt beter than my old Jlh?

Sorry for my English.

Greetz Maartie and Thanks.
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Old 29th March 2005, 08:15 PM   #2
Vikash is offline Vikash  United Kingdom
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take advantage of the sale on chipamp.com. then you can build and compare for yourself. the beauty of the chipamp is that it is so cheap to implement, you really wont be dissappointed no matter the result (but I'm sure like most of us, that you will find it great anyway. )

edit: for inefficient 4 ohm speakers, you will want to go for the 3886 or 4780 if you're considering the LM range. I think Carlos drives difficult loads with his snubbered 3886 and speakes very highly of it.
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Old 29th March 2005, 10:09 PM   #3
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Whow!
Dynaudio speakers are very hard to drive!
Go for the LM3886 with snubberized high cap. PSU, and I would even go for two paralleled chips per channel.
But you can start with a single (non-paralleled) stereo amp, try this first.
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Old 30th March 2005, 12:25 AM   #4
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If you like the sound of your John Linsley Hood '69 10watt I'd try the JLH class-A Updated found here.

http://www.tcaas.btinternet.co.uk/index-1.htm

I haven't heard a "real" JLH but I do have a Elliott P36 - DoZ which is very similar and I think they are nice sounding amps.

The Gainclones are so cheap to make, so build one just to satisfy your curiosity.
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Old 30th March 2005, 12:26 AM   #5
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The problem is... that Dynaudio speaker will not be very happy with a 10~20W amp.

A pair of paralleled LM3886 chips will give around 100W at 4 ohms, and about 22A max. output current.
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Old 30th March 2005, 01:10 AM   #6
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Carlos,

There is a "higher" power version suitable for the Quad ESL57. I thought that may be OK.

Anyway, I just had deja vu whilst typing this, that you were going to reply and tell me I'm an idiot, spooky.
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Old 30th March 2005, 05:40 AM   #7
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Quote:
A pair of paralleled LM3886 chips
HI Carlos

Have you actually tried this? Impressions compared to single chips?

It seems like a simple enough experiment but i don't have more of the same type of resistors i use in my GC to make such a comparison fair.

Has anyone else critically compared paralleled chips?
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Old 30th March 2005, 09:50 AM   #8
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Quote:
Originally posted by analog_sa
HI Carlos

Have you actually tried this? Impressions compared to single chips?
I made my subwoofer with 2 // OPA549.
Glorious bass, tight, fast, gives a punch in my chest.

Quote:
Originally posted by analog_sa
Has anyone else critically compared paralleled chips?
I did only used paralleled chips on my sub, so i can't comment soundwise if paralleling has some bad effect on the whole sound of a "normal" amp.
Anyway, I have this plan in my head for some time, which I will make as soon as I get some trafos for it:

Biamping my Epos speakers with:
- two paralleled LM3886 chips for the woofer.
- one LM3886 for the tweeter.

This is meant to be per channel, with independent trafos/PSUs.
This means 4 trafos/independent PSUs (for bass, treble and per channel).



But I am at this time testing something slightly different from the norm, which seems to work very well. and then I will make the amp this way.
I need some time, I only report things that work.
You guys go heating the soldering irons.
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Old 30th March 2005, 09:52 AM   #9
Vikash is offline Vikash  United Kingdom
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Quote:
Originally posted by carlosfm

Biamping my Epos speakers with:
- two paralleled LM3886 chips for the woofer.
- one LM3886 for the tweeter.
no LM4780 instead of two lm3886?
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Old 30th March 2005, 10:40 AM   #10
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Dear Maarten,

I also do own a pair of Dynaudio Nuance's and a JLH '69 and a Gainclone (2 transfomers and lm'3875's).

In my opinion it is not a matter of sounding better or something like that.

10 to 20 watt is more than enough for the average dutch room.

My gainclones do sound somewhat lighter in the treble and the bass is more sharply defined. But my wife likes the JLH 69 more......... So who knows.

My suggestion: build the Gainclone. (=Simple and quick, you can get the LM3875 from Bergsoft(.nl) for about 9). So you can compare yourself.

You are always welcome at my place, so you can form your own opinion. If so, please email me.


Luuk Boessenkool
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