The first allows the channel to be fed by either the channel one or the channel two input (enabling the unit to function as a splitter), while Phase inverts the polarity of the signal on channel two.įor re-amping a recorded guitar part, the output from the audio interface or mixer would normally be fed to one of the XLR balanced line inputs of the box, and the instrument-level signal from the output jack would be fed into an instrument amplifier, which would then be miked up and re-recorded. No figure is given for the instrument output impedance, but as a typical electric guitar might have an output anywhere from 3 kΩ to 20 kΩ, depending on the pickup type and the pickup switching system, having an exact value isn't all that critical anyway.Ī variable level control for each channel permits adjustment of the input level, and the output sockets for channel two have two associated buttons, labelled 'Source' and 'Phase'. The body is of metal construction (an alloy extrusion with steel end-plates), with rubber feet and a separate ground terminal for use in systems that don't already have a suitable ground.ĪRT quote the frequency response as 20Hz to 20kHz (☐.5dB at +4dBu), and a maximum signal level of +18dB can be accommodated with acceptably low transformer-saturation distortion. Either quarter-inch jack (balanced or unbalanced) or XLR line-level inputs are accepted, and both jack and XLR output connections are also present. In more practical terms, this means it can be used as a re-amping tool, as well as for its more conventionally DI-related functions. This is a passive interfacing device based around a pair of audio transformers, and is intended to convert mono or stereo line- or instrument-level sources to balanced XLR microphone- or instrument-level jack outputs. They have switchable limiters built in, too, which I have currently disabled but may end up wiring back in with an internal jumper switch later.ART produce an impressive number of inexpensive problem-solving boxes, one of which is the Dual RDB reviewed here. The RTS 1400 preamps are really decent preamps for the money, like an API 312 designed around a 5534. It's handy for having an all in one tool for sending tracks from the DAW out to stompboxes or reamping guitar or bass.Īlternatively it can be used as a standalone 2 channel DI/mic preamp (no phantom power or pad though) It was pretty quick an inxpensive to put together and sounds great. The panel I had made at Front Panel Express. 2x RTS 1400 mic preamp cards, caps replaced for same value but rated for higher voltage since these were designed for +/- 9V originally.
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