Owners Log................17 Mission Statement Rega’s philosophy is to make high quality products at sensible prices, as a means of reproducing music as faithfully as possible. Rega is committed to the design and development of new and existing products, both in hi-fi and other areas, that will...
Rega believes that moving coil and moving magnet cartridges require different types of phono pre amplifiers to achieve optimum performance. The Ios is therefore dedicated to moving coil cartridges and avoids compromises. We have avoided including any superfluous gadgets as they obstruct the signal path and degrade the sound quality.
07/08/2008 10:35 Page 4 Design Innovation The Rega Ios is a four stage all symmetrical amplifier. To provide optimum performance it is dedicated to amplifying the very low level signals that are generated by moving coil cartridges. The first stage uses a 1:10 step-up transformer, which can be...
Installation Ios will work well on most surfaces, such as a shelf or a table, provided there is sufficient air around it to prevent overheating. To avoid any possible magnetic interference and increased hum levels, site the Ios as far away from the turntable as the tonearm lead will allow.
All manuals and user guides at all-guides.com Ios english manual:Ios english manual.qxd 07/08/2008 10:35 Page 6 Ventilation The heat produced by the amplifier, although minimal, is dispersed to the air by the case, particularly the underside. Ensure that the case has an uninterrupted air passage around...
10:35 Page 7 Earthing The Ios uses a Class I earth system, where the case metal work and earth screen between the primary and secondary windings in the toroidal transformer, are connected to the line safety earth, by means of the mains lead.
10:35 Page 8 Cartridge selection The Ios phono pre amplifier is not suitable for use with any Moving Magnet (MM) cartridges, it can only be used with moving coil (MC) cartridges. The Ios has been designed to work with most manufacturers moving coil (MC) cartridges.
07/08/2008 10:35 Page 9 Powering Up Ios is activated by depressing the On/Off button situated to the left of the control panel. The power indicator LED will glow steadily. Always activate Ios before the power amplifiers and de- activate after they have been switched off.
It is permissible to try different loading conditions as sometimes changing the load gives a different sonic performance more suited to your personal taste. Ω The 100 setting is optimised for the Rega Apheta cartridge.
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The 15 Ω setting is optimised for the Rega Apheta cartridge. The Gain setting switch The gain setting switch selects the voltage gain of the phono amplifier. Gain I selects 70dB (switch up) and gain II selects 64dB (switch down), this will provide an input sensitivity of 61uV and 118uV respectively for an output level of 200mV.
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All manuals and user guides at all-guides.com Ios english manual:Ios english manual.qxd 07/08/2008 10:35 Page 12 The Filter control The filter is designed to enhance the Apheta cartridge by reducing unwanted high frequency energy present. The level is continuously variable from 0db to –6.5dB at a frequency and ‘Q’...
All manuals and user guides at all-guides.com Ios english manual:Ios english manual.qxd 07/08/2008 10:35 Page 13 Troubleshooting (no power, front panel does not light) Is the mains supply connected and the Correct the fault. socket switched on? Contact your Is the front panel on/off...
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All manuals and user guides at all-guides.com Ios english manual:Ios english manual.qxd 07/08/2008 10:35 Page 14 Troubleshooting (Power on, front panel lit but no output) Is the pre-amp connected to the Correct the fault. desired input and the correct input selected?
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All manuals and user guides at all-guides.com Ios english manual:Ios english manual.qxd 07/08/2008 10:35 Page 15 Troubleshooting (Loud hum when “phono” is selected) Is the ground lead from Refer to pages 4 & 5 the turntable (when fitted) of this manual and...
All manuals and user guides at all-guides.com Ios english manual:Ios english manual.qxd 07/08/2008 10:35 Page 16 Troubleshooting (Power on, sound from one speaker only) Are the connections Correct the fault by between the speakers and plugging in the the amplifier secure and connection.
All manuals and user guides at all-guides.com Ios english manual:Ios english manual.qxd 07/08/2008 10:35 Page 17 Ios Specifications General conditions Ω Generator source resistance 15 Ω Ω Load set to 100 & DC resistance set to 15 (Apheta) Ω Output load resistance 100K...
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All manuals and user guides at all-guides.com Ios english manual:Ios english manual.qxd 07/08/2008 10:35 Page 18 Ω Output resistance Ω Minimum output load resistance for –3dB point @ 15Hz RIAA accuracy Better than 0.2dB 100Hz to 40KHz Frequency Response 14Hz (-3dB) to 54KHz (-0.5dB) Better than 0.008% @ 1.5V 20Hz to...
All manuals and user guides at all-guides.com Ios english manual:Ios english manual.qxd 07/08/2008 10:35 Page 19 Owners Log Owner..................Date..................Where Purchased..................................Owner..................Date..................Where Purchased..................................Owner..................Date..................Where Purchased..................................
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All manuals and user guides at all-guides.com Ios english manual:Ios english manual.qxd 07/08/2008 10:35 Page 20...
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