These jacks have a 3 mega Ohm input impedance that will provide less loading (i.e.
#DIY 500 SERIES PREAMPS FULL#
Inserting a plug into either jack breaks the normal MIC input and the user has the full range of MIC GAIN and TRIM. These 2 jacks are used for instrument direct input and a THRU output to an amp, and are paralleled and wired together, as it is a passive design.
Continuous gain control from 0dB to 30dB. This control is most apparent when the signals being combined are at roughly equal levels, and is generally used when blending an instrument’s direct signal with its amplified signal, as captured by a microphone.įront panel TRS Input and passive through for hi-z sources. The VARI-PHASE control rotates the phase incrementally, allowing two signals with the same source to be phase aligned. Pushing the Silk button engages the Silk circuit, which enhances the source’s harmonic content in a manner very reminiscent of many of Rupert’s class-A vintage designs. The blend control allows you to achieve the desired tonal balance between the two sources. To achieve this, use the DI for an instrument’s direct signal and the mic preamp for either the mic’d speaker cabinet signal or an entirely separate source (like a vocal microphone). The 517 can be used to combine and compress a direct signal and an amplified signal. An LED light indicates when the compressor is active. To set the compressor, simply dial the threshold control down until the desired amount of compression is achieved. By default, the compressor is set to a fixed 2:1 ratio with fixed attack and release. The symbol “Ø” is often used to denote opposite polarity.īased around a new LDR (light dependent resister) design, the 517’s opto-coupler compressor has been simplified to a single threshold control with auto make up gain. Push button inverts the polarity of the signal path. If you get stuck or have questions, support is available via e-mail and the message board.A 12-way precision rotary switch covering from Line (0) and Mic from 0 to 66 dB in 6 dB steps.Įngages phantom power on the microphone input, as supplied by the 500 series rack. All the documentation is freely downloadable so you can be ready to go before your kits arrive.
#DIY 500 SERIES PREAMPS PROFESSIONAL#
Seventh Circle Audio provides professional quality electronic kits and support to handy audio recording engineers. Q: WHO MAKES THE BEST PREAMPS FOR THE MONEY?Ī: YOU DO.
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