AD8066 vs. LM4562

[douglesc]

There might be very few that have any expierence with these chips, but if you do, I would love to hear what you think, and of course any other chip you might want to throw in as well.

[Glenn2]

Originally posted by douglesc
There might be very few that have any expierence with these chips, but if you do, I would love to hear what you think, and of course any other chip you might want to throw in as well.

Both are quite good (and LM4562 is developing a cult) but having tried both I find LM6172, AD826, AD8620 better for duals... in that order.

AD8066 experience based on 2xAD8065 on brown dog adaptors and AD8620 based on 2xAD8610.

AD8065x2 was smooth but a bit boring, lacking bass dynamics.
LM4562 was very clean but rather dry and uninvolving.

All of this was in the LPF of a CD player.

Hope this helps.

[ctong]

Originally posted by Glenn2



Both are quite good (and LM4562 is developing a cult) but having tried both I find LM6172, AD826, AD8620 better for duals... in that order.

AD8066 experience based on 2xAD8065 on brown dog adaptors and AD8620 based on 2xAD8610.

AD8065x2 was smooth but a bit boring, lacking bass dynamics.
LM4562 was very clean but rather dry and uninvolving.

All of this was in the LPF of a CD player.

Hope this helps.

Can you elaborate more on the comparisons? What setup do you use?

[Ryssen]

AD8620

In my oppinion AD8620 has a strange metall (not hardrock)sound in the highs. Just ripped some out of my soundcard,and mounted some LM4562 instead. Havent had the time to listen yet.

[Glenn2]

Originally posted by ctong



Can you elaborate more on the comparisons? What setup do you use?

This was in the analogue stage of a Marantz CD-67SE.

[omendelovitz]

My 8066's haven't burnt in yet, but I'm loving them.

My impressions:

4562 - very nice sounding and adequate detail, but not outstanding. There's nothing wrong with them, however they don't stand out as exceptional either.

8620 - nice forward sound, all tonal frequencies are represented with lushness and aggresion, but many details are lacking - I know this b/c many reference tracks I use have entire sections deleted from representation. Not for audiophile use IMO.

8066 - prior to adequate settling time (1 hour's impression): superb accuracy and dynamics, tonally accurate (however a bit bassy - that's likely to settle down with 'age' IME), very high resolution, decent spaciousness to sound, excellent imaging for an op-amp. Impressive level of detail so far. I can see how some would see this as boring - the sound can be dry if the source material and delivery machine is less than stellar (e.g. standard ipod headphone out, mp3 files, most sound cards).

My suggestion: try these in an amplification section of an amplifier after a good quality DAC; mix them with some nice quailty caps and resistors, you'll never turn back!

[profiguy]

Originally posted by omendelovitz
My 8066's haven't burnt in yet, but I'm loving them.

My impressions:


8066 - prior to adequate settling time (1 hour's impression): superb accuracy and dynamics, tonally accurate (however a bit bassy - that's likely to settle down with 'age' IME), very high resolution, decent spaciousness to sound, excellent imaging for an op-amp. Impressive level of detail so far. I can see how some would see this as boring - the sound can be dry if the source material and delivery machine is less than stellar (e.g. standard ipod headphone out, mp3 files, most sound cards).

My suggestion: try these in an amplification section of an amplifier after a good quality DAC; mix them with some nice quailty caps and resistors, you'll never turn back!

I fully agree - used an 8066 in my dynaco cdv-pro and won't go back to anything else. Very detailed, excellent low end articulation and no ringing on the top whatsoever. Only disadvantage is the +/-12v supply limitation.

[sandyK]

I am using an AD8066 in the O/P stage of a Musical Fidelity
X-DAC V3, preceded by OPA2134s, instead of the original
all NE5532s.I have fitted 78L12/79L12 regulators close to the AD8066, and replaced the manufacturer recommended 100nF ceramic bypass capacitors with normal 100nF 63V types. This takes a slight hardness off high treble. I am also using an AD8066 in a headphone amplifier with a discrete buffer stage.
I tried the LM4562 in a preamplifier instead of the original design's OPA2134. Ultimately, I found the huge amount of detail
a little fatigueing, and reverted to the OPA2134. As a result of this, I replaced the generic 45xx device in my PCs Soundblaster
X-FI Extreme Music with an OPA2134. This combinatio of OPA2134 , with AD8066 in the headphone amplifier is very good indeed . In both the X-DAC V3 and the Headphone amplifier, I get a fabulous 3D soundstage using the AD8066.

SandyK

[Evo4Jon]

Hi,

I have a Musical fidelity B1 Mk2 (very close to the tempest model)

Just replaced my TL072CP with a 4562 and I noticed a great improvement in detail and space. There is an increase in very high frequencies which affect hihats... I would say 12khz and above creating a more delicate sound. I also have improved bass. Sounds Great and not fatiguing to listen to and moderate volumes. Midrange is a touch clearer and "aligned"

I also just bought an AD8066 and fitted this in the socket....
I am disappointed to be honest. The bass is increased a touch around 80hz but the bass "which gives the punch" is missing. Also strangely Sub kick drums sound flaccid and lacking in weight. The top end is more coloured and it sounds metallic - rather like titanium tweeters. The midrange is lacking lower mids and can sound a touch brash too.

In the end I guess it may just be a mismatch for the MF B1 mk2 as I had heard such good reviews, which prompted me to buy one and mount it onto a dip8 socket!

For now I am sticking with the 4562 for now - as it delivers... and delivers well!

One thing though, When used on a Musical Fidelity MK1 (which I also own) the 4562 detail can be a little harsh and fatiguing. Its revealing listen and can really delight but after a while I want something a little smoother.

Jonathan

[popaj]

Dear friends,
I would like to try AD8066, I need 4 pieces for my CD player Denon 2560, but have no where to get them in Serbia. Can someone help?
Dragoljub Pejčev
Balkan 40
18320 Dimitrovgrad
Serbia