Svart
Well-known member
ok so i got off my ass this weekend and proto'd an ssm2019 preamp IC onto a small SMD proto board. I threw some wires and a pot on it and proceeded to tear out all the preamp related parts, except for the phantom couplers, the zener protection and impedence resistors, on a spare(bought 5 extra channels specifically to mod!)channel and replace it with the proto preamp. these channels are super easy to mod since everything is marked, V+, V- and gnd are actually printed next to their jumpers and so on. i just ran twisted wires to where the bases of the input transistors would have been, the output to the ouput of the 5532 that was there and voila! working very well right away. the output of the 5532 goes to switching between channel and monitor and then to one section of a tl084 and so on.
opinions:
the sound of this IC is actually very good for what it is. i A/B'd that channel with another channel using the regular preamp setup and i could hear a slight difference in the high frequencies which were slightly soft in the ssm2019 channel, however I believe this to be my 2nd channel since the comparison channel is running matched 2n4403s and a opa2134 in the preamp, then going through 1 stage of an OPA404 instead of a tl084.
more on this and a clip later
opinions:
the sound of this IC is actually very good for what it is. i A/B'd that channel with another channel using the regular preamp setup and i could hear a slight difference in the high frequencies which were slightly soft in the ssm2019 channel, however I believe this to be my 2nd channel since the comparison channel is running matched 2n4403s and a opa2134 in the preamp, then going through 1 stage of an OPA404 instead of a tl084.
more on this and a clip later