Selling this to fund a future tube amp (probably a Lyr). About one month old. Silver faceplate. Perfect condition, ships in original packaging. Comes with this adapter already installed: http://coolfungadget.com/store/index.php?route=product/product&product_id=91 I paid $285 shipped for all of...

I bought this in mid-January and got the class A mod in early February. It all came from coolfungadget and sounds wonderful. I'm only selling it to fund a tube amp. I paid $300 total and would like to get $240.  

I'm using the Class A biasing adaptor (from coolfungadget) to bias my OPA1641 into class A in my Matrix M-stage. Is this a good idea? Is this safe to do? 

I have up for sale my excellent Matrix M-Stage solid state headphone amp/pre-amp... the latest 2010 version. It has the silver face plate and is wired for 110/120 volts. It is like new, about 3 months old, but has been broken in sound wise. I have the original box. $215. PayPal. I'll pay the...

Hi All,   I've upgraded my system so i'm selling off my Matrix M-Stage. It's 2 months old and in perfect condition. I bought it from coolfungadget in it's stock configuration.   It has a 230v plug socket, so only selling to UK and Europe.   I'm looking for £150 including shipment to...

Am rationalising my equipment inventory now I'm living in a small flat so have to let this go.   Bought from Coolfungadget with stock op-amp about a year ago. Lightly used and sounds great with my HD800  (no slouch with GS1000i either). No blemishes I can see on casework.   Looking for...

I am selling my nice Matrix M-stage V2 with upgraded opamp LM4562. I bought the amp from a fellow head-fier about 4 months ago and ordered the opamp later. I used it to power my D2000 with great results. Fantastic amp at this price point - no doubt about that. The upgraded opamp LM4562 adds more...

Hi,   I would like to purchase a Matrix M-Stage v2 with the US voltage. It should be in very good condition and include the power cable and hopefully the original packaging. Either color is fine but silver is my preference. It would also be nice if there was an RCA to RCA cable but not...

For sale is a Matrix "M-Stage" Headphone Amplifier(2nd Edition) w/ OPA627AP Mod.  Amp is in very good condition with minimal use. It has a minor scratch on the back, Also, one of the screws is slightly stripped as received from the manufacturer.  The amp comes with all accessories and original...

I've been looking around quite a lot, I can't find any answers x.x or opinions any headsup?   dac = HRT Music Streamer II   budget is 400.00

Ok, first off, sorry for yet another K701 amp thread.   That being said, I have done my due diligence and made a reasonable effort to comb through the old posts for an answer to this question. I was unable to find any direct comparisons specific to the AKG's. However, the 701's will not be...

I'm looking for either of these amps to power my D7000s that I am about to buy. They must be in good condition, but I don't mind about the inclusion of original packaging. Don't mind about power cord, but if it is included it must be 230V. Shipping to UK, payment through paypal. I'm looking...

I want to try the M-stage with my k701's.     I once let a potential Bottlehead purchaser audition my gear with his speakers before he pulled the trigger. Thought I would see if I could arrange a similar scenario.   Now that I think of it maybe I'll post an IC thread in the groups forum...

Hi I have that amp with little modifications for sale:   -output capacitors changed to Wima MKP -very bright blue diode replaced by orange one   Visually very good, technically excellent. It comes with power cord. I will add some few opamps for fun:) Asking SOLD plus ship. Coming...

Sold

Just had a quick question, maybe somebody can enlighten me. If this matrix M-stage is a pure class A amp, what is the purpose of the Class A Biasing mod?

Great condition Matrix M-Stage in black. Has the OPA627 class A biasing mod and I'll also include an unmodified dual OPA627 op amp for play! Includes original box and power cord. Free shipping in the lower 48 at my asking price.

Hello :) I have a pair of AKG K702's and powering them using my FiiO E7 & E9, im now thinking about upgrading the amp, wanting more!  How's the FiiO E9 Vs Matrix M-Stage, would you say there is a huge difference between the two? I've also heard about the 'Lovely Cube' and 'Matrix Cube'...

Anyone looking to upgrade pass their Matrix M-Stage contact me. Paypal is preferable.

This is the first version Matrix M Stage. It comes with the OPA627AU with Class A Biasing Mod installed. It also comes with an Audio GD SUN OPA SUN as an upgrade. The Matrix has worked flawlessly since I bought it. Price $200 includes shipping and any pay pal fees as well. Will only ship...

Prefer black.  if you have one to sell, please let me know thanks.

I am looking for a Matrix if anyone is thinking about parting with one please PM me. Not interested in any opamp rolling so I prefer a basic M Stage.

Anybody compared these two?    I had the E9 and found it transparent and strong.  I ditched it because of the static on the Volume pot.  I now have a AUNE which I like better (after a few EQ adjustments), but am ready to upgrade to an M-Stage.  I was told there isn't much sound difference...

Im looking for a good condition Matrix M-stage preferably located in australia (for shipping and voltage reasons) including all cables.   Thanks

Will Ship To: conus Amp is in perfect working order and condition....I bought this from Galactus and it is ad described. i wanted to compare to my Tube decware Taboo and at6the cost I prefer my Taboo. I will ship this to the CONUS for the 190.00 asking price. Canada extra...