Quote: It is a bargain indeed but when you use them for the first time try not to get disappointed as they won't sound as you might expect them to.K701 take weeks of burning-in to reveal their clarity and openess.Use pink or white noise from here http://whitenoisemp3s.com/free-white-noise...

Could anyone tell me if 3.9k resistors are ok for an A class biasing of OPA2227? What resistor value would be the optimal for an operating voltage of 15V? Thanks...  

Ok guys,here it is...       Got my dip-8 sockets this afternoon.Having only one OPA2227 I soldered the two 5.6k resistors on the socket so that I could switch between biased and unbiased configuration.As a procedure,switching was not that easy (one resistor was cut off while trying) as the...

Originally posted by hifimanrookie The one one I trust and dealt with concerning opamps627 is tamaudio..fast and reliable..on ebay there are some people who sell fake 627..soubdquality is terrible...so if u wanna play safe..use reputable sellers..and tamaudio is also the core seller or matrix...

http://avnetexpress.avnet.com/store/em/EMController?hbxSType=New+Search&term=opa2227p&catalogId=500201&action=products&N=0&filterButton=true&langId=-1&currency=USD&displayCurrency=EUR&y=8&x=25&updateTransactionCurrency=false&storeId=500201...

Always buy from trusted-awarded sellers so that even if the products are not genuine,returns or refunds are 100% guaranteed.The truth is that PayPal never let me down in this matter and I got all my money back whenever I opened a case.It takes sometime but compensation is guaranteed.Chris is...

The OPA2227P which is the DIP-8 version costs about $7-8 on e-bay.If you have AKGs you won't regret spending the money.

Got my LM4562 order from Canada today. The original OPA2134 had been substituted by OPA2227,which I ''borrowed'' from my JDSLabs Cmoy ,as it sounded better. Reading all those praising comments on LM4562 made me quite impatient to finding out how it sounds compared to the 2227.My test has just...

Quote: Irony suits you...Mr ''off course''...

Quote: If you are asking about the RCAs then yes I have tried it myself.In fact I still have both connected to the matrix as input 1 and 2.Switching between the one that came with my STX and a more expensive one, made no difference, at least nothing worth the extra $50.Don't know if that...

Quote: Your card comes with 4 3.5mm stereo to RCA(red&white) cables.Plug the 3.5mm jack to the front out (green lit,3rd from the right) and the RCAs in one of the matrix's inputs and you're ok.Buying an expensive IC won't make any audible difference

Quote:     I already have ,as it took me more than 30 times of switching the 2227 and 2134 to verify their differences.     Quote:   Some electronic engineers claim that class A biasing reduces the lifetime of the op-amps.Can anyone confirm that?

I got my M-stage last Wednesday.It says v2.1 on the board.It came along with a power cord and EU adapter.   I was pleased to see how well built it is.The blue operation led on the front panel is quite discrete when on and not as bright as many have complained.It seems that there has...

What is the average burn-in time for the Matrix? I happen to have two pairs of RCA interconnects: a 2965 Mogami and an Oehlbach NF1. Does anyone know if they are good enough to use with matrix? Thanks  

Hi everyone     I ordered Matrix yesterday to match it with my K701 and I just hope it will be as good as every K701/2 owner claims.My first low budget amp was a pro-ject Headbox II which I hated right away being a musically bad match for my cans.I got the Cmoybb from jdslabs after that, but...