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With the various digital reverb chips available a small company should come out with a good kit that we can add to our amp builds. Here are a few suggestions for different kits.
• A Fender/Vox kit with the reverb input signal taken after the first stage, tone stack and volume control. That way the input signal would be fairly clean unless the amp input was overdriven. The reverb signal would be mixed back into the audio signal chain through an op-amp directly ahead of the phase inverter, after the FX loop and an optional cascading overdrive channel. There would be a reverb drive control, a reverb return level control and an input signal treble cut tone control. (These controls could be panel mounted pots or trim pots, the amp builders' choice.)
• A Marshall style kit similar to the Fender/Vox kit for amps with a tone stack ahead of the phase inverter. For this kit the reverb input signal would be taken after the initial gain stage but would include 2 or 3 tone controls to further shape the reverb input signal.
• Both designs could be incorporated in the same add-on kit, with headers on the circuit board to be connected to pots and switches.
• The kit would include a separate power supply module which would provide a regulated voltage from one of the B+ nodes, perhaps the one powering the first stage.
I would expect the initial kits to retail for around $150-200 but that the price might come down considerably after production was ramped up. What would be included would be 2 or 3 printed circuit boards with th3 switches, pots, jacks and other auxiliary parts provided by the amp builder.
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Any suggestions or comments? I believe that there would definitely be a demand for something like this in the DIY amp building community if someone could put such a design together, perhaps financed by a kickstarter campaign.
Steve A.
P.S. There could be a stripped down version of this adding just a buffered solid state FX loop ahead of the phase inverter, perhaps with a series/parallel option.
P.P.S. These kits would be based on the assumption that an op-amp mixing stage ahead of the phase inverter should be fairly neutral in sound and response.
• A Fender/Vox kit with the reverb input signal taken after the first stage, tone stack and volume control. That way the input signal would be fairly clean unless the amp input was overdriven. The reverb signal would be mixed back into the audio signal chain through an op-amp directly ahead of the phase inverter, after the FX loop and an optional cascading overdrive channel. There would be a reverb drive control, a reverb return level control and an input signal treble cut tone control. (These controls could be panel mounted pots or trim pots, the amp builders' choice.)
• A Marshall style kit similar to the Fender/Vox kit for amps with a tone stack ahead of the phase inverter. For this kit the reverb input signal would be taken after the initial gain stage but would include 2 or 3 tone controls to further shape the reverb input signal.
• Both designs could be incorporated in the same add-on kit, with headers on the circuit board to be connected to pots and switches.
• The kit would include a separate power supply module which would provide a regulated voltage from one of the B+ nodes, perhaps the one powering the first stage.
I would expect the initial kits to retail for around $150-200 but that the price might come down considerably after production was ramped up. What would be included would be 2 or 3 printed circuit boards with th3 switches, pots, jacks and other auxiliary parts provided by the amp builder.
◆
Any suggestions or comments? I believe that there would definitely be a demand for something like this in the DIY amp building community if someone could put such a design together, perhaps financed by a kickstarter campaign.
Steve A.
P.S. There could be a stripped down version of this adding just a buffered solid state FX loop ahead of the phase inverter, perhaps with a series/parallel option.
P.P.S. These kits would be based on the assumption that an op-amp mixing stage ahead of the phase inverter should be fairly neutral in sound and response.
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