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Related Manuals for Atohm RS 700 GT EDITION
Summary of Contents for Atohm RS 700 GT EDITION
- Page 1 OWNER’S MANUAL RS 700 « GT EDITION » V1.2 PLEASE READ BEFORE USE...
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Page 2: Precautions And Warnings
PRECAUTIONS & WARNINGS The lightning flash with arrowhead symbol, within the equilateral triangle, is intended to alert the user to the presence of uninsulated dangerous voltage within the product’s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. - Page 3 Depending on the applications, different versions are developed and offered. The ATOHM RS700 amplifier in this "GT EDITION" is a power unit operating in 4 modes. The first mode (GENERAL mode) allows you to "drive" any type of speakers with power, dynamism, finesse, and precision.
- Page 4 NOTES REGARDING ATOHM'S EXCLUSIVE PROCESSING • U-GUARD™ Processing (All Modes) The U-GUARD™ processing aims to reduce the formation of square signals (clipping distortion) at the output of the device and to avoid the saturation of the power stages at maximum power. The DSP constantly measures the amplitude of audio signals.
- Page 5 • X-GUARD™ Processing ( GT1-GT2-GT3 modes only ) The X-GUARD™ processing ensures that the excursions of the bass speakers never exceed an absolute limit (too high distortion and risk of breakage). This excursion control processing constantly analyzes the input signal and its parameters (especially frequencies/amplitude) and compares them to a set of instructions.
- Page 6 LANDMARKS AND GETTING STARTED Page | 6...
- Page 7 1- Input level potentiometer 2- Programmation connector (for factory using only) 3- Multifunction digital potentiometer (can respond differently based on certain settings ) 4- Mute ( position 0 = no output ) 5- Analog input selector ( RCA or XLR) 6- Digital input selector ( not used in this amplifier version) 7- Phase selector for XLR output (subwoofers) 8- Filtering selector...
- Page 8 "GT1" mode: to be used exclusively with ATOHM GT1 speakers. Power output: 2*220W RMS / 4ohms. "GT2" mode: to be used exclusively with ATOHM GT2 speakers. Power output: 2*280W RMS / 4ohms. "GT3" mode: to be used exclusively with ATOHM GT3 speakers. Power output: 2*700W RMS / 4 ohms. Page | 8...
- Page 9 Depending on the output level of your AV processor or preamplifier, you can choose the input sensitivity level via a switch located on the same board. The "0dB" position provides a total gain of 29.8 dB. This setting is suitable for the vast majority of system configurations.
- Page 10 TRIGGER CONTROL (12v) The device's standby and power-on modes can be remotely controlled through the trigger input. To perform the control, follow these steps: - Connect one of the 12Vdc trigger jack inputs (3.5mm jack, REF 22) to the control system (preamplifier, processor, or home automation) via a cable that is exclusively intended for this purpose (consult your dealer).
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Page 11: Led Indicators
LED INDICATORS Blue LEDs (REF 14): device is powered on / main switch is on Red LEDs (REF 13): U-GUARD™ Processing (operates in all modes) T-GUARD™ Processing (operates in all modes) The U-GUARD™ processing intervenes on the signal to limit power and prevent clipping/saturation of power stages. - Page 12 In GENERAL mode: compatible with speakers of all types (impedance of at least 3.3 ohms). In GT1-GT2 and GT3 mode: compatible with ATOHM GT1-GT2 or GT3 speakers only. The X-GUARD and X- TEND processing specific to each model is then activated.
- Page 13 STEREO WITH SUBWOOFER(S) SETUP (all mode) TYPE 2.1 TYPE 2.2 Depending on the preamp capabilities, you can use XLR inputs (REF 17) or RCA inputs (REF17). You can also use a variable level source (DAC/STREAMER) by making sure the "variable level" option has been activated in the device. Generally, it is strongly advised to turn on the source and check the output level setting before turning on the amplifier.
- Page 14 In GENERAL mode: compatible with speakers of all types (impedance of at least 3.3 ohms). In GT1-GT2 and GT3 mode: compatible with ATOHM GT1-GT2 or GT3 speakers only. The X-GUARD and X- TEND processing specific to each model is then activated.
- Page 15 Note 1: The subwoofer outputs (XLR) include a Bessel-type low-pass filter (12dB/oct - 400Hz). It is only there to make the work of the limiters on some subwoofers easier. It does not affect the frequency response in their usable band. Note 2: The cutoff frequency (low-pass filter) of the subwoofers must be adjusted on the subwoofer(s) .
- Page 16 From the previous example, it's possible to make a compromise to obtain a more linear overall response. By shifting the cut-off frequency to 60Hz on the subwoofers, the maximum amplitude of summation in the overlap band decreases from +3dB to only 1.4dB. By following the same principle, it's possible to obtain a nearly linear overall response.
- Page 17 In GT1, GT2 or GT3 mode: we suggest the following cutoff frequencies: GT1: 80 Hz or 100 Hz (60Hz is possible with slope of 24dB/oct) GT2: 60Hz or 80Hz GT3: 60Hz or 80Hz Note 7: Regardless of the filtering selected, an incorrect adjustment of the phase selector (REF7) of the subwoofer outputs (XLR) leads to a strongly degraded response with level cancellation in the overlap band.
- Page 18 BASIC HOME THEATER CONFIGURATION (All mode) Depending on the preamp/processor capabilities, you can use XLR inputs (REF 17) or RCA inputs (REF17). You can also use a variable level source (DAC/STREAMER) by making sure the "variable level" option has been activated in the device.
- Page 19 In GT1-GT2 and GT3 mode: with ATOHM GT1-GT2 or GT3 loudspeakers only. The X-GUARD and X-TEND processing specific to each model is then activated. For a home-theater configuration, it is mandatory deactivate X-TEND processing by setting the processing selector (REF9) to position “2” . (This processing is not compatible with the bass management of audio video processors).
- Page 20 The input selection is done through the REF5 analog source selector. In order to obtain the best Hi-Fi and HOME-CINEMA audio performance, the subwoofer(s) must be connected to the XLR subwoofer outputs (Ref 18) as indicated in Chapter 11. The audio-video processor should be set by indicating the absence of a subwoofer connected to it. It should also be configured with the front two speaker channels (L and R) in "large"...
- Page 21 14) CLEANING For external cleaning (after disconnecting main plug ), only use a soft, non-fuzzy, dry cloth (microfiber type) possibly slightly dampened with a glass cleaning product ( alcohol ). Never use products such as solvents or detergents. Periodically and depending on their accumulation, the ventilation grilles (REF10) must be removed and cleaned. This cleaning is carried out externally with compressed air (preferably dehumidified and oil-free - prefer an aerosol can).
- Page 22 DSP controlled power amplifier with 4 working modes 1 general mode for use with all kinds of speakers 3 specific modes for use with ATOHM GT SERIES speakers only Nominal Power / 4 ohms (2 channels in operation) in general 2*700 Wrms mode.
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