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.
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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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.
)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.
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.
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.
analog_sa said:
I made my subwoofer with 2 // OPA549.
Glorious bass, tight, fast, gives a punch in my chest.
analog_sa said:
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.
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
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
I have built the "ultimate JLH" type circuit from the class A amplifier site mentioned above, I've made many changes of my own including modern V.high speed transistors, greater power and fan cooling. It gives about 22 watts per channel and is one of the best amps I have ever heard.
I have also built an amplifier using LM3886 IC's (I refuse to use the stupid "gainclone" name!, people have been building chip based amps for dacades before it) and, Yes it is shockingly good (better than most amps I have heard upto £1000) but not as good as the JLH. When you consider though, that the JLH has about £200 of parts in it(14 x 22000Uf caps, twin 300va TX's, huge heatsinks, fan cooling etc) and the LM3886 amp cost about £20 and is not THAT far behind it....... makes you think eh?.
I have also built an amplifier using LM3886 IC's (I refuse to use the stupid "gainclone" name!, people have been building chip based amps for dacades before it) and, Yes it is shockingly good (better than most amps I have heard upto £1000) but not as good as the JLH. When you consider though, that the JLH has about £200 of parts in it(14 x 22000Uf caps, twin 300va TX's, huge heatsinks, fan cooling etc) and the LM3886 amp cost about £20 and is not THAT far behind it....... makes you think eh?.
Re: Re: Jlh '69 vs Gainclone or Hiraga
It depends on the type of music they listen to.
I know a guy who was satisfied with his system until I took one of my CDs to his house.
This CD as strong bass, but it has to sound tight.
Well... the resonance was so nasty we simply couldn't bare to listen.
The amp was a 3-channel Denon power amp, and the speakers were B&W 602S3.
The speakers are quoted 8 ohms, 91db sensitivity.
The amp is quoted 120W RMS/8ohms, 200W RMS/4ohms.
The amp simply couldn't drive those speakers.
The 602 are very hard to drive, they go as low as (measured) 2.8 ohms.
Dynaudio speakers are also very hard to drive.
I have a friend that had to decide between changing his big AVI integrated (150W RMS/8ohms) or his pair of Dynaudio speakers.
One didn't go with the other.
He changed the speakers.
paulb said:
It depends on the type of music they listen to.
I know a guy who was satisfied with his system until I took one of my CDs to his house.
This CD as strong bass, but it has to sound tight.
Well... the resonance was so nasty we simply couldn't bare to listen.
The amp was a 3-channel Denon power amp, and the speakers were B&W 602S3.
The speakers are quoted 8 ohms, 91db sensitivity.
The amp is quoted 120W RMS/8ohms, 200W RMS/4ohms.
The amp simply couldn't drive those speakers.
The 602 are very hard to drive, they go as low as (measured) 2.8 ohms.
Dynaudio speakers are also very hard to drive.
I have a friend that had to decide between changing his big AVI integrated (150W RMS/8ohms) or his pair of Dynaudio speakers.
One didn't go with the other.
He changed the speakers.
analog_sa said:
I'm coming up with a new LM4780 board, that will allow all 3 options on a single board: stereo, parallel and bridged.
Making exact comparisons will be greatly simplified, as it will come down to merely switching a jumper.
So far, the parallel LM4780 was not better than LM3875 (both premium versions), and my preference went with smaller cheap each time I ( and some of my friends) compared them. But those comparisons where not exactly accurate (and fair).
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