**Stax SR-404 and Stax SRM-3 amp combo REVIEW**

May 5, 2004 at 5:35 PM Thread Starter Post #1 of 21

KR...

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Introduction

While it is understood by most, I might as well say it anyway just in case someone cannot figure it out on their own, which always happens it would seem with every review; everything written in this review is truly in my humble opinion only. My opinions are all based on actual hands on observation and not on anything written on-line or anywhere else. Of course, everyone hears a bit different due to ear shapes and hearing ability, so you may not hear what I can hear and vice versa.

[size=medium]Review of Stax SR-404 and Stax SRM-3 amp combo[/size]

I will now take on several different topics of debate that always seem to creep up whenever people are talking and writing about Stax systems.

1. “In order to have a Stax system you must spend a lot of money and have a high-end source”. This is not entirely true, after trading in my previous system I only had to spend about an additional $200 in order to get my current system, so as you can see; there are always ways around this. I tested two different sources for this review, a very modest Cambridge DVD player that cost only $200 and a high-end Panasonic DVD-Audio Player, which cost about $1000. They both sound good with the Stax SR-404 and Stax SRM-3 amp combo, but of course, the Panasonic DVD-Audio Player (model DVD-A7) sounds clearly better and it is what I will use for this review. Therefore, if you do not have a high-end source (within reason of course) I would not suggest not trying this system, if you really want it. The Stax will only sound as good as the rest of your system so it will let you hear just how well or bad your source and cables really are, so of course for maximum enjoyment you will want to have a source and cables that are up to par with your amp and headphones.

2. “Stax systems are bright”. This may have been the case for older models but those days appear to be clearly over. Once again, (unless you have a bright source or bright cables or are listening to a bright CD) at least this model of Stax headphone and amp will not sound bright. The highs are full extended, extremely detailed and wonderfully airily without ever sounding harsh or bright. This was the case regardless of playing traditionally troublesome instruments like brass winds and treble guitars with were all showcased without a hint of distortion.

3. “Stax headphones have no bass or poor bass”. I most certainly heard deep glorious bass when I listen to music, but in order to make sure this was correct I listen to bass test tones at normal listening volumes in order to hear just how low these headphones can go. With the help of the Stereophile Test CD 1, I played tracks number 20 to 31. It would seem that for this combo, the bass began to become rolled off at track number 29, which has 31.5Hz 1/3- Octcave Warble at -20dB. It was still very much audible however but not as loud as the rest. At track 30 (25Hz), things were very rolled off and I could still hear it but the sound was harder to make out and much lower. At track 31 (20Hz) I could just barely hear with concentrated effort but it was extremely low at this point. Perhaps with a better amp this might not be the case, but I was not able to test it with any other amp for this review, so there you have it. This roll off was not noticeable with any of my music CDs, and the bass that was presented was as tight, detailed and impactful as I have ever heard with any headphone system. However, if you have CDs with bass that goes down to those extreme levels, then this might become more noticeable to you.

4. “Stax headphones are only good for certain types of music”. This is not true at all, I listen to many different styles of music, and in fact, I tried to listen to at least one track of every style of music that I could think of from rock, metal, blues, jazz, hip-hop, pop, country, folk, world, classical, opera, chorus, sound effects, and electronica! I think that would cover everything and they all sounded fantastic with the Stax SR-404 and Stax SRM-3 amp combo.

Now with those four points out of the way, I want to write about the key points of the sound, which this system can produce. This system is not in anyway colored, it is as neutral as they come. Why can I say this? Because this system allowed me to hear that, every CD that I own sounds different, in their own special way. For example, badly recorded CD’s, well sounded badly recorded, well recorded CD’s sounded well recorded, audiophile CDs sounded like audiophile CDs, compressed CD’s sounded compressed and well you get the idea. The tone of each instrument was just dead on and my CD’s really have a wide range of instruments.

I was also extremely impressed by the way, the Stax SR-404 and Stax SRM-3 amp combo was able top handle even the most complex of compositions. Regardless of how complicated things got, the Stax SR-404 and Stax SRM-3 amp combo was able to clearly and beautifully define every single instrument and vocal with ease.

Some tips to keep in mind when using any Stax system. Warm up time is an absolute must! For my amp it normally takes about an hour of warm up time to really start sounding great, your Stax amp may differ, as there might different warm up times for different Stax amps. The headphones themselves require at least 100 hours of break in time to sound their best; my headphones have nearly 300 hours of use already.

In inclusion, I must say that I am very happy with my Stax system. No system is perfect, I really wish it did not take so long to warm up and the last few bass octaves are rolled off, but those are the only flaws that I could find. Of course, everyone will have different wants, needs, and taste when it comes to headphone systems. Not everyone will want to have such a neutral system if most of their CD’s are poorly recorded, but for me at least, this was the best way to go and I am very happy with my choice.

Equipment used:

Stax SR-404 Headphones
Stax SRM-3 Headphone amp
MIT MI-330 CVTerminator Series Two interconnects
Industrial Power Cord (just a much beefier version of what came with the amp)
Panasonic DVD-Audio Player model DVD-A7
Countless CD’s

[size=xx-small]Special footnote about those bass tones from the Stereophile CD:

The 200Hz-100Hz bands can be considered the upper bass, 80Hz-40Hz the midbass, and the remaining bands the low bass.[/size]
 
May 5, 2004 at 6:31 PM Post #2 of 21
I have the same phones/amp combination which I have used with several CD players, currently a CEC belt-drive version. I tend to agree with most of the points in the review. The sound is very good. If you buy Stax direct from Japan, you will be geting very good sound for the cost. They sound very good right out of the box, but with some attention to connections, warm-up and the like they become a dream system.

As regards bass, I have heard the story, but only from secondary sources that the Stax lambda system, of which the 404 is the latest version, was designed at the request of Mercedes Benz to allow its engineers to listen to low frequency noise in vehicles. Whatever the truth of this story, bass is one of the strengths of this design. The bass is very extended and with a slight emphasis in the mid bass, I would estimate around 300-600 Hz. I personally find that I get a visceral bass from this system, I seem to feel it in my chest, even though I know that the phones can not be stimulating my body that way. I suspect that it is just that the bass is very tight and clean and can be very convincing.

However, a key point with this system is the need for a good electrical source to run the amp. I also use an upgraded power cord and was blown away by the immediate improvement in sound when I first plugged this in. From time to time, I clean all contact surfaces, including RCA and power plugs, with Progold and this gives a much enhanced sound, with more dynamics as well as better bass. Some day I will try one of the silver contact enhancers. I am also careful to plug the amp in directly into a wall plug, rather than into an extension cordor adapter. The point seems to be that this set-up require all the juice it can get to perform best.

I would like to hear this on one of the newer Stax transistor amps, especially the top line model which is supposedly a higher power machine.

As regards brightness, this is an issue with all electrostatic systems. They do treble very well, but if the source has bad treble they will show it. With nuetral recordings, such as Telarcs, you hear no treble harshness at all. The treble problem is fundamentally a source issue, too many companies peak the treble, especially on rock/pop music, to sound good on mass market equipment. You can of course deal with this using tone controls/equalizers,
but this can induce slight but noticeable degradation of sound. I use equalizers with speakers but have long since stopped them with my phones.

On the other hand, I have used ceramic filters/digital noise suppresors such as the TDK NF-CO9 or the square Radio Shack model. These are supposed to get rid of ultrasonic noise and this may be the source of some treble harshness or that they cut slightly into the audible frequencies of sound. I feel that these get rid of just the right amount of high frequencey hash. You can put them anywhere on a cable, I have used one on each RCA cable, close to the CD player. Other positions seem to produce subtly different effects, such as some loss of bass. They can also be used on power cables, but my Cardas cable on the SRM3 is so fat I can't get one on it.

Again, if the power requirements of the amp are met, treble harshness is less of an issue, possibly because there is more bass.

Finally I agree on the warm up issue, but this is not just a problem with the phones. I have been struck on occasions when I have tried turning the cd player on first for a while, that 1/2 or more of the effect is with the cd player. My speaker systems show similar effects, but it is just less noticeable there because they never get to the peak of performance of which the Stax are capable.

I leave the phones connected to the amp at all times, since I have found that I seem to hear a degradation in sound if the phones have been taken off for some time. Electrostatics have to charge up the voltages on the transducers. Older electrostatic systems used a self-charging circuit which could take several seconds to get going properly. The newer systems and amps supposedly charge as soon as they are turned on but it is my impression that some charging of a lesser level continues for some time. Generally I try to let the system warm up for 1/2 hour without use and may also run the phones loud for 30 seconds before use. I use the same routine with my older Koss E-9 electrostatics.

In short this equipment is a high performance system, Stax brochures say to treat it like scientific equipment and I have worked with scientifc equipment which required similar care in handling to get full performance. However, they are not particularly delicate. I have had some electrostatics for over 30 years which just seem to keep running. My 404's have never had a problem in 3-4 years. I have never had an operational fault with any Stax phones although I have had to replace some plastics parts which have been damaged by dropping or steping on units.
 
May 5, 2004 at 10:38 PM Post #6 of 21
Heh. I think when Tuberoller asked for reviews, I don't think he was hoping the first big one would be a *positive* review for a pair of Stax headphones.
tongue.gif


Great review(s).
 
May 5, 2004 at 10:46 PM Post #7 of 21
Very nice review KR. Glad to hear you're liking the Stax so much.

I propogate the "you need a good front end" myth, and will comntinue to do so. I know of at least one member right off the top of my head who didn't like their Stax that much with their cheaper player, but loved it with their Meridian 508.20. They still preferred their Senn setup and sold off the Stax, but their liking of the Stax increased with the better source.
 
May 6, 2004 at 12:19 AM Post #10 of 21
Thanks for the follow up edstrelow! It was nice to hear from someone else who has the same combo. If I were to turn the volume up, I would be able to hear those last few bass note with clarity. However, I cannot even imagine someone listening to music that loud normally. (pass the halfway mark on the dail)

Iron_Dreamer wrote:
Quote:

KR, how do you find the kick or impact of the bass compared to dynamic cans you have had?


For metal (music) drums, which would be kick drums, the impact is enough to make you blink. For even deeper drums that you would find in classical and some world styles you can feel it just as well if not better than most ultra high end headphone systems. The best part is that it's really fast and detailed and not slow, boated, and sloppy like many dum-bass headphones.

ServinginEcuador wrote:
Quote:

I propogate the "you need a good front end" myth, and will comntinue to do so. I know of at least one member right off the top of my head who didn't like their Stax that much with their cheaper player, but loved it with their Meridian 508.20. They still preferred their Senn setup and sold off the Stax, but their liking of the Stax increased with the better source.


If you re-read what I wrote that think we still both agree somewhat.

TimSchirmer wrote:
Quote:

Interesting. Have you had a chance to listen to the 006t or the T1?


I have listen to all current Stax amps except for that one that looks like a stand that was release recently. However, these were at head-fi meets, and with meets you only get a taste of what something sounds like, a good taste but still but a taste and sometimes depending on how it's set-up not a really good one taste at all
wink.gif

So I can't really comment on how they compare to this model. However, I will say that the Lambdas are much, much easier to drive than the Omega2.
 
May 6, 2004 at 12:25 AM Post #11 of 21
Quote:

Originally Posted by KR...
For metal (music) drums, which would be kick drums, the impact is enough to make you blink. For even deeper drums that you would find in classical and some world styles you can feel it just as well if not better than most ultra high end headphone systems. The best part is that it's really fast and detailed and not slow, boated, and sloppy like many dum-bass headphones.


Sounds good. I have been thinking that have a Stax system (in fact the same one you've got) in addition to my CD3K system would be perfect for me, but perhaps the Stax rig would be all I'd need. I won't have the money to find out for a while, at any rate. I definitely liked what I heard from the SR404/006T at the last LA meet.
 
May 6, 2004 at 3:18 AM Post #12 of 21
I'm no longer strongly tempted by audio assaults on my wallet EXCEPT for a Stax system!
 
May 6, 2004 at 3:35 AM Post #13 of 21
i still to this day find that on some cds i get the brightness issues, some have said maybe its the recording, but i dont think so, others say its my source (rega planet 2000) but how much do i need to spend to get consistent sound? thats my main question... does anyone have a cary i can borrow, or 4000 dollars for that matter. thats my only complaint about the stax other than having to send my pair back due to a defective driver right out of the box, but that has been rectified. btw, nice review kr. and for those wondering about the 006t, its a good amp, not as good as the kgss, but good nonetheless. maybe a bit pricey at 800 but hey im rich who cares, yeah right!
 
May 6, 2004 at 4:19 AM Post #14 of 21
KR,

The SR404 didn't seem tipped up to me until I got the O2. After that the more forward nature of the 404s come out and you see that they are indeed a little tipped up. Nothing glaring, and not always diagreeable, just there.
 
May 6, 2004 at 4:42 AM Post #15 of 21
Quote:

Originally Posted by fyrfytrhoges
i still to this day find that on some cds i get the brightness issues, some have said maybe its the recording, but i dont think so, others say its my source (rega planet 2000) but how much do i need to spend to get consistent sound? thats my main question...


Not much (well, kinda relative but not $4K for sure). What you are hearing is definitely, and indeed, the recording. No if's, and's or but's. Welcome to real resolving power - the ability to pick apart a recording in the blink of an eye. And your cables. And your source.

Just go for a sound that is pleasing to you under most circumstances - one that, in your mind, sounds "right" with your "reference" material. That's an important point - you must select a stunning recording, one without peer or question, and use it, exclusively, to judge setup differences. I have about 4 reference pieces, really not many more. Sure, I swap out between dozens of different recording to check things but only those 4 tell me exactly what I need to know, without a single mental doubt that what they are telling me, while I listen to them, is true.

Everything else played and shown by the system is just, truly, showing up the differences in the materials being played. Just with Stax you get it in your face.

As you've noticed
wink.gif
 

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