User manual SIMA SVS-1B

[. . . ] SVS-1B Volume Stabilizer TM now with Enhanced Sound Circuitry Sima Products Corporation 140 Pennsylvania Ave, Bld #5, Oakmont PA 15139 412-828-3700 800-345-7462 www. simacorp. com 2003 Sima Products Corporation User Manual Printed in USA p/n 21695 rev 03. 09 SVS-1B Volume Stabilizer Sima Products Corporation 140 Pennsylvania Ave, Bld #5, Oakmont PA 15139 412-828-3700 800-345-7462 www. simacorp. com 2003 Sima Products Corporation TM now with Enhanced Sound Circuitry Printed in USA p/n 21695 rev 03. 09 User Manual Limited Warranty Sima Products Corp. ("Sima") warrants that if the accompanying product proves to be defective to the original purchaser in material or workmanship within 90 days from the original retail purchase, Sima will, at Sima's option, either repair or replace same without charge (but no cash refund will be made). To enforce warranty you must deliver, mail or ship the product, together with both the original bill of sale and this limited Warranty statement as proof of warranty coverage to: Sima Products Corp. Att: Customer Service 140 Pennsylvania Ave. [. . . ] For more technical information on how the unit operates, refer to the Technical Information Chapter starting on page 16. The SVS-1B is the ideal accessory for audiophiles who want to decrease the volume fluctuations between quiet and loud portions of music or audio but still want to maintain the dynamics of the music. The SVS-1B has been designed to work in your home or home theater system and with other devices like satellite receivers. It allows any source to be optimally recorded onto cassette tapes, DAT, DCC and MD discs. Also it can be used while listening to music at normal levels. With home theater systems, the SVS-1B maintains a constant volume level, eliminating the need to constantly adjust between loud and quiet scenes. The SVS-1B Volume Stabilizer has been tested with a wide variety of sound sources and has been optimized for excellent sound reproduction without a "compressed" sound. And now with the new enhanced sound circuitry, the unit responds like the human ear for a more natural sound. Unit works in Bypass mode but no sound in the Active mode even though the Active light is on. More noise or hiss is present during quiet passages with SVS1B active than when bypassed 6 Figure 1 Front Panel OUTPUT 19 Figure 8 - Effect of the Volume Stabilization Setting on Output 6 Figure 1 Front Panel OUTPUT 19 Figure 8 - Effect of the Volume Stabilization Setting on Output 18 Technical Information (cont. ) 1) POWER LIGHT (red) - This indicates when power is applied to the unit and the POWER switch is ON. 2) ACTIVE LIGHT (green)- This indicates when the SVS-1B is in the active mode and not in the bypass mode. 3) MODE SWITCH - Push this button in to put the SVS-1B in the audio circuit. When this button is out, all of the electronics are bypassed 4) VOLUME STABILIZER SWITCH - This switch selects if you want Normal (2:1 slope) or Maximum (10:1 slope) Volume Stabilization. 7 The SVS-1B has two volume stabilization ratios: 2:1 in the normal mode and about 10:1 in the Max mode. That is, for every increase of 10 db of the input signal, the output changes only 5 db in the normal mode and about 1 db in the Max mode. This allows you to select the amount of Volume Stabilization you desire for a given situation. In the bypass mode, the output signal is the same level as the input signal regardless of volume. As you can see in figure 8, The SVS-1B's Volume Stabilizer switch allows you to select either 2:1 curve (NORM) or an almost flat volume stabilization (MAX). With the Volume Stabilizer switch set at the Norm position, notice that when the input signal varies from -30 db to +10db (40db change), the output changes from -15db to +5db (20db change). Therefore, the volume change is reduced by a factor of 2:1 (40/20=2). However, In the Max position a 40 db input change results in less than a 4 db output change, thus a slope of about 10:1. 18 Technical Information (cont. ) 1) POWER LIGHT (red) - This indicates when power is applied to the unit and the POWER switch is ON. 2) ACTIVE LIGHT (green)- This indicates when the SVS-1B is in the active mode and not in the bypass mode. 3) MODE SWITCH - Push this button in to put the SVS-1B in the audio circuit. When this button is out, all of the electronics are bypassed 4) VOLUME STABILIZER SWITCH - This switch selects if you want Normal (2:1 slope) or Maximum (10:1 slope) Volume Stabilization. 7 The SVS-1B has two volume stabilization ratios: 2:1 in the normal mode and about 10:1 in the Max mode. [. . . ] Active Mode With the MODE SWITCH in the "IN" position (ACTIVE LIGHT is on), the SVS-1B Volume Stabilizer is in the signal path. The Volume Stabilization switch allows you to adjust either some volume stabilization (at the Norm position) to maximum volume stabilization (at the Max position). The MODE SWITCH toggles volume stabilization on and off. Typically, the volume will be slightly louder in the active position. [. . . ]