ROXi Microphone and Instrument Preamplifier / EQ / DI Owner’s Manual Rev. A Grace Design, 4689 Ute Highway, Lyons, CO 80503 303.823.8100 / info@gracedesign.com www.gracedesign.
1 Welcome Welcome and thank you purchasing this ROXi microphone preamp pedal. This little box is the culmination of many decades of us refining our mic and instrument preamps, and then packing it all into a single, rugged stage box. Even though it’s a compact footpedal, we cut no corners designing and building this unit. As a mic preamp and EQ, it will compete with any full size studio gear and help any source you plug into it sound incredible.
Safety Marking Symbols Caution: Read Accompanying Documents This symbol, located on the equipment and in this manual, refers to important instructions. Read this manual thoroughly before operating this equipment. Service Information The Grace Design ROXi contains no user serviceable components. Contact Grace Design for repair and upgrade information. In the event that your Grace Design ROXi needs to be returned to the factory, contact us for a return authorization number.
5 Top Panel Controls and Features 1 7 4 3 2 8 4 9 5 10 6 11 12 1. Gain control 7. BOOST / FX footswitch 2. Signal / peak LED indicator 8. Low frequency shelving cut and boost 3. Boost level 9. Midrange cut and boost 4. FX insert blend control 10. Midrange frequency select 5. Amp / Tuner output level 11. MUTE / TUNE footswitch 6. Power indicator light 12.
6 Back Panel Controls and Features PUSH 1 2 3 1 2 3 4 5 6 7 8 9 10 1. Universal 100-240VAC power supply input 6. Effects insert return 2. DI output ground lift switch 7. Effects insert send 3. Balanced XLR DI output 8. XLR / 1/4" combo input jack 4. Balanced ¼” amp output 9. 48V phantom power switch 5. Stage Tuner ¼” output 10. Phase reverse switch 7 Side Panel Controls and Features 9V OUT 500mA ON 123456 1 1. DIP Switch function diagram 2. 9VDC, 500mA output 2 3 3.
8 Connecting ROXi to Stuff 8.1 XLR MIC / ¼” LINE COMBO INPUT This input can accommodate any type of microphone dynamic, condenser or ribbon - via the XLR input, or any ¼” mono instrument input via the center ¼” phono jack. The XLR connector is wired pin 2 positive, pin 3 negative and pin 1 ground. The ¼” center of the combo jack is for connecting any instrument with a pickup, electret mic or line out jack to the ROXi. The jack is a standard 1/4” wired tip signal, sleeve ground.
represent a good operating level. The indicator will start to flash red when your signal is 13dB before clipping, so occasional red flash is ok, but all red means you should turn the gain control down. Gain range for this input is adjustable between +5dB to +60dB (mic) or -15dB to +40dB (instrument). The Boost control can add another 10dB to these ranges.
unwanted low end rumble or stage noise that may find its way into your microphone. The HPF is activated with the side panel DIP switch #3 – the up position activates the HPF, the down position turns it off. There are 2 HPF roll off frequencies: 75Hz and 150Hz which are set by the side panel DIP switch #2. GAIN HIGH PASS FILTER 0dB -12dB 40 125 1k 20k Hz turning up a honkier or peaky sound. Heres a good read on frequencies: https://en.wikipedia.
output. This enables you to quickly and easily cut your signal to the FOH or stage amp and tune or unplug your instrument without having to have the soundperson mute your channel. When MUTE / tune is active, the adjacent LED illuminates RED. 9.12 FOOTSWITCH CONTROLS Boost / FX This switch has two different functions based on the setting of DIP switch #6 labeled FS2. In the Boost setting (switch in the down position), the footswitch enables the boost circuit.
.2 CONNECTION DIAGRAM 10 ROXi connections Nothing too terribly hard and fast here - just the basics about how to plug stuff in and out of your preamp. INPUT paths are shown in blue. OUTPUT paths are shown in red. There are many ways to setup your preamp, so if you aren’t sure about how something works, please have a look at your owner’s manual, check out our website - www.gracedesign.com - or feel free to call us. We are always glad to help out in any way we can. 1.303.823.
10.3 ADJUSTING INTERNAL JUMPERS Several ROXi settings can be adjusted via internal jumpers. While it’s not trivial to do, if you are handy with a screwdriver and tweezers, you’ll be fine. This is not something you should attempt to do on a dark stage or in the back of the tour van.
10.4 INTERNAL JUMPER LOCATIONS J21 configures the LOW EQ corner frequency. It is set to LF1 at the factory (125Hz corner frequency). J21 LF SHELF LF 125Hz LF 250Hz HF SHELF HF 2kHz HF 1kHz BOOST KNOB BOOST GAIN TRIM J7 configures the HIGH EQ corner frequency. It is set to HF1 at the factory (2kHz corner frequency). J7 J2 INSERT PAD -6dB OFF -16dB J2 activates the boost knob for gain trim mode, providing an additional variable 10dB of gain when Footswitch 2 is in set to INSERT.
11 Specifications GAIN RANGE (Instrument Input to DI Output) MIC In, DI Line, Insert pad 0dB, Boost 0dB MIC In, DI Mic, Insert pad 0dB, Boost 0dB Inst In, Low Gain, DI Line, Insert Pad 0dB, Boost 0dB Inst In, High Gain, DI Line, Insert Pad 0dB, Boost 0dB Boost +0.6dB to +55.1dB -24dB to +30.5dB -13.4dB to +41.1dB +0.6dB to +55.1dB 0-11.
12 Cleaning and Maintenance Your ROXi is chassis is constructed out of high quality aluminum and steel. Under normal circumstances, very little maintenance is required to keep it looking good. However, if you find it getting more dirty or dusty than you like, here are some cleaning tips: We recommend using a little shot of Windex™, applied to a clean, dry, lint free cloth. Gently wipe all surfaces, taking care not to allow the cleaning product to build up around or under the knobs.
14 Manual Revisions Revision Page Change Date Initials A all Initial release 01/08/2023 edg 15
