Red 1 500 Series Mic Pre User Guide FA0901-01 www.focusrite.
Dear Focusrite Customer, Thank you for purchasing the Red 1 500 Series mic pre from Focusrite. First announced in 1993, Focusrite’s Red range of analogue audio processors rapidly gained legendary status with Red 1 becoming a much sought-after mic pre found in top recording studios the world over.
RoHS Notice Focusrite Audio Engineering Limited has conformed and this product conforms, where applicable, to the European Union’s Directive 2002/95/EC on Restrictions of Hazardous Substances (RoHS) as well as the following sections of California law which refer to RoHS, namely sections 25214.10, 25214.10.2, and 58012, Health and Safety Code; Section 42475.2, Public Resources Code. Introduction This Focusrite Red 1 500 Series is a high quality, single-channel microphone preamplifier in 5.25” x 1.
Box Contents • • • • • Red 1 500 Series module 2 of #4-40 hex-head fixing screws 3/32” A/F hex key (for fixing screws) 1.5 mm hex key (for gain adjustment knob) This User Guide A word about Power The Red 1 500 Series is supplied with DC power (±16 V and +48 V) by the rack into which it is plugged. The rack’s own Power Supply Unit (PSU) may be fitted with a power on/off switch. This should be used to apply power to the Red 1 500 Series module (and any other modules in the rack).
Front Panel 1 5 2 4 3 1 1. Mounting holes – secure the Red 1 500 Series in your rack using the hex-head screws and hex key supplied. 2. GAIN Control – a 12-position switch for setting gain. 3. Polarity/Phase – an illuminated push switch, inverts the polarity of the signal. 4. Phantom Power – an illuminated push switch, provides +48 V phantom power at the input. 5. VU Meter – an illuminated meter with VU scaling, indicates the module’s output signal level. Also see item 6 on the rear panel.
Rear Panel 6 Pin 1 7 Pin 15 6. VU Meter Attenuator – slide switch, inserts a 6 dB pad in the meter feed. When down, the VU Meter scaling is normal (0 VU = +4 dBu). When up, the VU Meter under-reads by 6 dB. 7. Edge Connector – 15 Pin edge connector, makes all power and audio connections to the 500 Series rack.
Installing Red 1 500 Series While installing the Red 1 500 Series into a rack is straightforward, a few precautions should be observed: • ALWAYS switch the rack power supply off before inserting the Red 1 500 Series module. Attempting to insert the module while the rack is powered may damage the Red 1 500 Series module and/or the rack itself. The rack must also be switched off before the Red 1 500 Series module is removed.
Adjusting the gain The gain control is a rotary switch with 12 positions. The lowest position is a 6dB pad and the mic signal will be attenuated by 6 dB at this setting. Each clockwise step of the control increases the mic pre gain by 6 dB, up to a maximum of 60 dB. The nominal output level of the Red 1 500 Series module is +4 dBu when the meter indicates 0 VU. The meter may be recalibrated so that 0 VU = +10 dBu by setting the slide switch at the rear of the module to its up position.
Technical Data Edge connector pinout: PIN CONNECTION 1 Chassis ground 2 Audio Out: “cold” (–ve) 3 4 Audio Out: “hot” (+ve) 5 6 7 8 Audio Input: “cold” (–ve) 9 10 Audio Input: “hot” (+ve) 11 12 Power: +16 V 13 Power/audio ground 14 Power: –16 V 15 Phantom Power: +48 V Note: Pins 3, 5, 6, 7, 9 & 11 are unused by Red 1 500 Series.
Specifications Maximum Output +25.5dBu (20Hz–20kHz) Maximum Input >+28dBu (200Hz–13kHz), >26dBu (160Hz–20kHz) Frequency Response Deviation at 30dB gain (20Hz–20kHz) ±0.1dB Bandwidth (–3dB) at 30dB gain 103 kHz Range at 60dB gain (–0.5dB) 125Hz–24kHz Bandwidth (–3dB) at 60dB gain 32Hz–75kHz Output Noise –104.5dBu CCIR-RMS –107dBu A-wgt EIN –124.
Warranty and Service All Focusrite products are built to the highest standards and should provide reliable performance for many years, subject to reasonable care, use, transportation and storage. Very many of the products returned under warranty are found not to exhibit any fault at all. To avoid unnecessary inconvenience to you in terms of returning the product please contact Focusrite support.
