On this page you will find information about my Handmade Recording Equipment.
My DIY projects include: Discrete Transistor Preamplifiers, Tube Microphone Preamps, Audio Transformers, Vintage Preamp Circuits, Inductor Based Equalizers and more…
Thank you for looking!
Design based on MP2148 discrete technology. The circuitry is completely transistor based. Inputs and outputs are transformer coupled.
In this six channel microphone preamplifier I have used my custom made audio output transformers. The sound is more detailed and natural compared to vintage Carnhill transformers.
CS2848 | Dual Mono Recording Channel Strip
The CS2848 is unique recording / mastering completely discrete transistor channel strip with transformer coupled inputs and outputs, inductor based EQ and classic opto-compressor. The design features fully discrete signal path - no Integrated Circuit is used.
This is my new design based on the MP2148 transistor discrete circuitry.
CS2848 has improved output stage. I have added new improved output transformer driver which reduce low frequency distortions
The preamplifier section and EQ section uses DOPA'48 single ended input discrete Opeartional Amplifiers.
Bart HRK delivered exactly what I had envisaged in a dual mono channel strip!
Rich sounding mic preamp that takes all of the character of vintage British mic pres without sounding overly old, soft, noisy or woolly.
The inductor-based EQ is musical and always seems to do exactly what you want it to. I haven't found a situation yet where it has not been exactly right for what I have wanted. It is refreshing how well it works and how easy it is to get the sound you want considering how harsh and over-elaborate some EQs have become since the omnipresence of parametric EQs.
MP2148 is a classic transistor dual channel microphone preamplifier inspired by vintage transistor recording equipment. Each channel has low noise transformer coupled microphone preamp, transformer line input and high impedance instrument input.
I have always wanted to build completely discrete transistor preamplifier. I do believe that it is possible to build transistor preamlplifier which will outperform IC's based designs in terms of parameters and sound quality. Looks like MP2148 proves that!
The idea was to keep the character of classic transistor preamps, but achieve better sound quality and fidelity compared to vintage preamps.
Read the review of the MP2148 Dual Mono Discrete Microphone Preamplifier by Fabrice Blondel
ADD Production - Geneva - Switzerland
"Right out of the box, I immediately fell in love with the HRK preamp. From a manufacturing point of view and a business point of view, I feel good with the unit...
This is a preamp I enjoy working with. I have tested the HRK MP2148 with Neumann M149... "
Are you curious what is inside my preamps... ??
Check the Technology page where I will share some of my secrets!
You can see video which reveals how HRK custom made transformers are made or how I make my circuits and more... Have a Sneak Peek...