Initial impressions of the SinglePower MPX3 tube amp
Jul 12, 2003 at 2:12 AM Post #16 of 52
Quote:

Originally posted by arnett
i'm really impressed by the stock electro harmonix 6SN7s. they are the first stock tube i've heard that's acceptable. i'm hearing no harshness or grain at all. very warm sound with a slight treble roll-off.
smily_headphones1.gif


The Electro Harmonix is pretty good (it's also a stock tube on the Cary CAD 300SEI, IIRC). It's only when you compare it to good NOS that you hear a loss in fine detail. Still, it's got a nice tonal balance, which many new stock tubes miss completely.
 
Jul 12, 2003 at 2:23 AM Post #17 of 52
Quote:

Originally posted by Hirsch
The Electro Harmonix is pretty good. It's only when you compare it to good NOS that you hear a loss in fine detail


hirsch,

you know me. i'm not that much of a detail person. i'm a tone person.
wink.gif


Quote:

I may try this same tube setup when I finally get the supra Ive been anxiously awaiting.


KShaft,

keep in mind my sony DVD/SACD/CD player is a little on the bright side. so are my wireworld ICs. and i'm also using the beyer DT-880s.

my tube set up *may* be a bit too lush when using the HD600.
smily_headphones1.gif
 
Jul 12, 2003 at 2:27 AM Post #18 of 52
Quote:

Originally posted by FCJ
The CPX3 is (roughly) 6x6.25x5.75 (that includes the tube height).


Thanks you have a nice setup. How do you find the chassis build quality with the CPX? Is it still flimsy, or has he upped the ga. of the sheetmetal? I read that the chassis flexes when installing tubes. Are these well built and reliable amps?

How much does the CPX go for.
 
Jul 12, 2003 at 2:33 AM Post #19 of 52
Quote:

Originally posted by pigmode
Thanks you have a nice setup. How do you find the chassis build quality with the CPX? Is it still flimsy, or has he upped the ga. of the sheetmetal? I read that the chassis flexes when installing tubes. Are these well built and reliable amps?

How much does the CPX go for.


You should check with Mikhail on price (info@singlepower.com).

I haven't found either the CPX3 or the MPX3 to be flimsy at all. I find them both to be reliable and extremely well built.

I'm not sure if there are any other CPX3's out there. I bought mine at the May NY meet from Mikhail. Unfortunately, since I bought the MPX3 I don't use it all that often, but it does compare favorably. It's warmer but not as detailed as the MPX3.
 
Jul 12, 2003 at 2:36 AM Post #20 of 52
my MPX3 is very well built. the chassis doesn’t flex when installing tubes (although it IS a little tough getting the tubes in and out of their sockets). even the side of the unit where the headphone plugs in is solid. no flexing there, either.
 
Jul 12, 2003 at 2:43 AM Post #21 of 52
Oh man Arnett, I can see a good inexpensive source in your not to distant future!

biggrin.gif


Im still seeing which one I want. Wadia 830, SCD-1, xa777es, krell...etc... choices choices!

k.s.
 
Jul 12, 2003 at 2:54 AM Post #22 of 52
On thing I did nit-pick about when I auditioned the MPX3 at the Grado meet, was that the volume pot was not consistent in its volume changes throughout its rotation. I do not know what pot is used on this model, but I did mention this to Mikhail at the time. No one else seemed to notice or mention this though, I think, but it kinda bugged me.
 
Jul 12, 2003 at 2:59 AM Post #23 of 52
Quote:

Originally posted by jpelg
On thing I did nit-pick about when I auditioned the MPX3 at the Grado meet, was that the volume pot was not consistent in its volume changes throughout its rotation. I do not know what pot is used on this model, but I did mention this to Mikhail at the time. No one else seemed to notice or mention this though, I think, but it kinda bugged me.


That was an early production unit, IIRC. My unit doesn't seem to have this issue.
 
Jul 12, 2003 at 11:08 AM Post #25 of 52
pigmode, the amp that Mikhail is building for me has been internaly braced and he says it's super strong. No flex at all.
jpelg, My amp is coming with a Goldpoint Stepped Attenuator, so I imagine you could get one built with whatever pot you wanted in one.
Mikhail is very easy to deal with and has worked with me on building a custom Supra. He's gone out of his way to find parts and tubes for me. I've read here about people wondering about QC, but he's got quite a few amps out there now and I have not heard of any of them breaking down yet. Considering the time and quality of parts he's putting into my amp I feel I got a great deal.
 
Jul 12, 2003 at 11:32 AM Post #26 of 52
Quote:

Originally posted by pigmode
FCJ,
Are you saying you prefer the MPX3?


Generally, I prefer the MPX3. It's a bit more detailed and controlls the bass better than the CPX3. However, they are pretty close, and if I had to live with only the CPX3 I would be very happy.
 
Jul 12, 2003 at 5:06 PM Post #27 of 52
Hi all:

The comments here and in Tuberoller's review certainly echo what I heard from the MPX3 at the CA meet. The sound is just so damned involving. Can't wait to get mine in a few days.

Bob
 
Jul 12, 2003 at 5:27 PM Post #28 of 52
Im going to have one made for me when i come back from vacation- probably in august .
i really hate to get rid of the melos but ill do a comparison of both amps and keep the one i like better.
 
Jul 13, 2003 at 6:09 PM Post #29 of 52
i noticed a very slight hum on my MPX3 that has not gone away with break-in. a tube amp with a little hum is to be expected. but the hum on my amp seems to come from the left channel only. it's only noticeable during silence between tracks or when there's no music playing. so it's no dig deal at all. but the fact that the hum is only coming from *one channel* has me a bit concerned.

i have determined that it's not the tubes. also, with the huge box the MPX3 shipped in, i cannot imagine there was damage during shipping.

do the other MPX3 owners hear this humming from the left channel? is this just part of the design? or is it my unit?
 
Jul 13, 2003 at 7:07 PM Post #30 of 52
Quote:

Originally posted by arnett
do the other MPX3 owners hear this humming from the left channel? is this just part of the design? or is it my unit?


The first MPX3 that I bought had a hum, but it was in both channels. I got a replacement and haven't noticed a hum. I would contact Mikhail.
 
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