The Stax Thread III
Mar 21, 2018 at 2:05 PM Post #14,731 of 25,558
Hi,can anyone help with problems I have with a first version of the srm1 mk2 amp.The offset stays around -120v and adjusters have virtually no effect and the balance of the right channel stays around -30v with adjuster having hardly any affect.I have changed all the electrolytic caps but not the blue and brown film caps.All the resistors seem to have the correct values.The bias voltage is 175v,is this ok but the bias resistor is 3.3M which I think is wrong.Thanks in advance for any help that you can give.
 
Mar 22, 2018 at 4:49 PM Post #14,732 of 25,558
I've been searching this forum for about an hour and still haven't found a clear, simple answer to my question. My SRD-7 is getting noisy. I'm cleaning it up; but is there a reasonable replacement out there? Could be an adaptor or complete amp. I can power it from the tape-out of my integrated or tape out to Audioengine N 22.
 
Mar 22, 2018 at 5:10 PM Post #14,733 of 25,558
I've been searching this forum for about an hour and still haven't found a clear, simple answer to my question. My SRD-7 is getting noisy. I'm cleaning it up; but is there a reasonable replacement out there? Could be an adaptor or complete amp. I can power it from the tape-out of my integrated or tape out to Audioengine N 22.
spritzer modded srd-7
 
Mar 22, 2018 at 5:56 PM Post #14,734 of 25,558
My L700 pads arrived today and I put them on muh L300LE... Besides the plusher, more comfy feel, they seal better than the stock (L300LE/L500) pads, therefore bringing back the bass extension.
image1.jpeg



L700 on the Left
L300LE on the Right
image2.jpeg



Green is L700 pads
Yellow is stock L300LE pads
L700 PADS VS L300.jpg


Originally fresh out of the box, the L300LE had much worse bass extension and a fat bump between 80-100Hz. Typical of Lambda's with a poor seal or vent mod. The above measurements were taken within 10 minutes of each other, with multiple runs verifying a good fit to the test coupler. Today's stock results were much better, maybe because the initially stiff stock pads softened up and provided a better seal... I'm not really sure. I do know the L700 pads fit a lot tighter than the stock pads and don't snap in place as easily.
 
Mar 22, 2018 at 6:32 PM Post #14,736 of 25,558
I thought the 700 pads are not a direct replacement on the 300LE
Was there a need for some modification?
 
Mar 22, 2018 at 7:24 PM Post #14,738 of 25,558
I thought the 700 pads are not a direct replacement on the 300LE
Was there a need for some modification?

The L300, L500, and L700 are all the same in regards to pad mounting points, just need to make sure you face them correctly (there is a correct orientation to install them, install them in reverse and they won't seal as well.)
 
Mar 22, 2018 at 7:25 PM Post #14,739 of 25,558
Thanks
 
Mar 22, 2018 at 7:35 PM Post #14,740 of 25,558
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Mar 23, 2018 at 7:15 AM Post #14,742 of 25,558
I have a Carbon and Ground Grid coming from @soren_brix in about 3 weeks. Planning a little shoot out between the KGST, Carbon, and Ground Grid. My personal pair of headphones are the L700 and if @Pokemonn and @ahmedie are available we can add the 007 and 009 to the mix. It should make for a very good time!

Well my plans to execute this have been pushed to the right. It’s looking like another month before I get them in hand.
 
Mar 23, 2018 at 2:07 PM Post #14,744 of 25,558


Ok got almost all LXX series except L500lol, I would say the different between L700 and L300limited is about 5%. limited is a little grainier (harder sounding) and do not extent as much in treble which make them sound to have a little more bass. They also do not image or separate as good as the L700 just 5% less (again bcz L700 extends in treble and they are more transparent)... you can think of them as a more warmer more forgiving version of L700. Definitely sound like a L300 with L700 technicalities. only 30 min burn in....I will update my impression if they change with burn in...I will burn them for next weeks.
that was almost expected, nice collection there
 
Mar 24, 2018 at 3:52 AM Post #14,745 of 25,558
Has anyone heard an SR404 Signature with 507/404LE pads? My SR404 pads are pretty worn down and I need to get some replacements. I know most people prefer 404LE over regular 404 and it seems like different pads was potentially one of the major upgrades. Since both replacements pads are the same price I was debating which direction to go. I've also never heard a 404LE.
 

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