There are lots of pre kits but I have only seen one frame kit. Your idea for a build kit for the 500 stuff is GREAT so I think you have a good corner going here and all the other 500 series preamps are cool because it makes the whole 500 frame really very attractive… but where are the compressors and EQ's? For mic preamps there are probably 20 to choose from but for EQ and comps… not so much.Is there anyone who sells 500 Series DIY Frame kits or is anyone aware of lower cost alternatives to the Sweet Ten and the API 10 space units? It seems like there should be alternatives to the API PS also (true blue?). I don't speak for everyone obviously but I personally don't need any more mic pres and in my eyes the market is flooded with 500 series preamps. Is this what you're all asking for? In the mean time, I need to finish my discrete op amp and transformer designs so that Eisen can offer complete mic pre kits.As to the question 'is this what I am asking for?' I suppose once a concrete design was settled on, it would not be difficult to offer complete, user-assembled kits.

However, designing a 500 Series EQ is part of my long-term agenda and I'd love to hear your specific suggestions. This particular circuit is so simple (only one op amp!), why not just offer a universal template to be completed any way you please? I felt it was becoming trivial to try and differentiate, commercially, between so many 500 mic pres all (except for the biz and the buzz) sharing essentially the same design. I admit, I started working on this project a year ago and am a little late to the table.

Is this what you're all asking for? In the mean time, I need to finish my discrete op amp and transformer designs so that Eisen can offer complete mic pre kits. Granted, I think I'd have a difficult time trying to offer an open-ended DIY EQ, especially something as easily accessible.

This particular circuit is so simple (only one op amp!), why not just offer a universal template to be completed any way you please?Įqualizers, on the other hand, have the potential to be much more complicated (and expensive!), containing up to 6 active stages and the plethora of passive components that follow. EQ would be my first call anyway, any chance of that happening?I admit, I started working on this project a year ago and am a little late to the table. I think there is a big market for a DIY 500 series mic pre but I think there is an even bigger market for an EQ.

Diy 500 series