User manual SPL GAINSTATION

[. . . ] User's Guide Gain Station Power SOURCE Mic Hi Z -30 0 dB 9 18 Clip HI PASS 50 Hz Off AD OVL 48V Limit PHASE Rev. PHANTOM LIMITER 10k 1. 2k 200 On Off Peak Off +Fet C 19 21 18 16 15 14 13 12 11 10 O NG LEA 22 24AIN dB 12 16 26 9 29 32 7. 5 35 6 38 4 41 2. 5 46 1 54 b 63 tO e+ Tu e F ff BE GAIN TU 18 2021 U -10 -9 -8 -6 E -12 -5 -14 22 -2. 5 -16 23 24 -18 0 24. 5 -20 2 3. 5 25 -22 25. 5 5 -24 25. 8 5. 5 -25 -26 26 6 TPUT LEV L dB dB Mic: +7dB w/transformer Class A 60-Volt Amplifiers Discrete High-Gain Preamplifier / Model 2272 GainStation 1 Models 2272, 2273 Single channel microphone and instrument preamplifier User's Guide GainStation 1 Version 1. 0 ­ 6/2003 Designer: Ruben Tilgner Models 2272, 2273 This user's guide contains a description of the product. It in no way represents a guarantee of particular characteristics or results of use. The information in this document has been carefully compiled and verified and, unless otherwise stated or agreed upon, correctly describes the product at the time of packaging with this document. [. . . ] When finished, first deactivate the phantom power and wait at least 30 seconds before disconnecting the microphone to allow residual current to discharge. Phantom power should only be activated when using microphones that require it. Please be sure to deactivate phantom power with all other microphones. Unbalanced microphones may only be used with phantom power deactivated. 48 V The 48V LED illuminates to indicate activated phantom power. When deactivating phantom power, it can take several seconds for the LED to go out, since the 48-V current dissipates rather slowly. When changing microphones, you should wait until the LED is completely dark before re-patching. 16 GainStation 1 Control elements LIMITER The GainStation 1 offers two types of output level limiting: PEAK and FET. The limiter is pre-output level control, so that the limited signal can be optimally adapted to the internal or external converter. The peak limiter operates with special diodes that convert signal peaks into a type of saturation. Depending on the signal, this allows levels to be effectively and subtly limited. This type of limiting works very quickly, reliably limiting even microsecondlong transients, and is very effective for drums and percussion. The peak limiter also enables maximum loudness. Operation is displayed via the Limit LED. The FET limiter is additionally available when the tube stage is activated. The FET circuit operates with a Field Effect Transistor (FET), which is connected to the tube and enables--always in conjunction with the peak limiter--a reduction of signal amplitude. Thus this limiter works in a similar fashion to a compressor, which makes it very effective for signals that undergo unforeseeable level changes (i. e. vocals, speech, guitar, bass, piano etc. ) and where minimum loss in signal quality is desired. The peak limiter is always active post-FET limiter to ensure reliable protection. The Limit LED also displays the operation of the FET limiter (always somewhat more calmly than with peak limiting). IMPORTANT NOTE: If the tube stage is deactivated while FET limiting is active, the LED will continue to display in FET limiting mode. For more information on using the limiters please see page 20, "Limiter". LIMITER Peak Off +Fet Limit GainStation 1 17 Control elements Power POWER-LED This LED indicates that the GainStation 1 is connected to the proper AC current and switched on. If the tube stage is active when the unit is switched on, it can take several seconds before a signal can be heard--this time is necessary for the tube to reach operating temperature. -30 0dB 9 18 Clip LED Level Display The level display shows the peak level before output level control. A special circuit allows the LED`s to vary in brightness to display in-between values. [. . . ] This warranty does not apply if: · the product was not purchased from an authorized SPL dealer · repairs are required due to normal wear and tear · the product has been abused, misused or improperly maintained, or if repairs or alterations have been made or attempted by any other than authorized SPL service personnel · the serial number has been removed or defaced In no event shall SPL be liable for any indirect, incidental or consequential damages from the sale or use of this product, either during or after the warranty period. SPL disclaims liability for any implied warranties, including implied warranties of merchantability and/or fitness for a specific purpose, after the warranty period. This warranty gives you specific legal rights. You may have other rights, which vary from country to country and state to state. [. . . ]