Sonance VC30RIM Stereo Amplifier User Manual
Contents
1. J SONANCE Sonance 212 Avenida Fabricante San Clemente CA 92672 7531 USA 800 582 7777 or 949 492 7777 FAX 949 361 5151 Technical Support 800 582 0772 www sonance com 2005 Dana Innovations All rights reserved Sonance is a trademark of Dana Innovations Decora is a registered trademark of Leviton Manufacturing Co Inc 33 1541 11 05 VC3ORIM X IMPEDANCE N MULTIPLYING sonance VOLUME CONTROL INSTRUCTION MANUAL INTRODUCTION The VC30RIM is an impedance multiplying stereo volume control that features 12 control positions soft touch action and silent switching capability The VC30RIM incorporates a rotary control and can be safely used with amplifiers that deliver up to 30 watts RMS per channel When properly implemented the Sonance VC30RIM allows the safe use of multiple pairs of speakers with amplifiers not specifically designed to run the low impedance loads presented by multiple speakers Adjustable impedance jumpers allow as many as 8 pairs of 8 ohm speakers or 4 pairs of 4 ohm speakers to be driven by a single 8 ohm capable amplifier APPLICATIONS The VC30RIM is designed to have a single pair of speakers connected to a single volume control Its impedance multiplying feature allows multiple volume control speaker sets to be safely used with a single amplifier The included adjustable impedance jumpers can be set to accommodate different total numbers of speaker2. see a safe overall impedance of 8 ohms 8 x 4 32 32 4 8 speakers were connected to an amplifier in k X2 e Xi r 1 Count the total number of speaker pairs L e X8 the amplifier will be driving and note f their nominal impedance according to ex4 their manufacturer leX2 le 2 Set the impedance jumpers right i according to the tables below by slipping the jumper blocks over the appropriate pair of blades Be sure to set both jumpers 8 OHM CAPABLE AMPLIFIER 4 OHM CAPABLE AMPLIFIER Number of 8 Ohm Speakers 1 2 Pair 3 4 Pair 5 8 Pair 4 9 16 Pair More than 16 Pair Not Recommended z 3 i cr gt fo So 3 Speakers 1 Pair 2 Pair 3 4 Pair 5 8 Pair More than 8 Pair Jumper Position gt lt gt lt co Not Recommended Speakers 1 Pair X1 Speakers 1 Pair 2 Pair 3 4 Pair More than 4 Pair zZ 3 a D n gt So Eg gt lt B gt lt 3 4 Pair 4 Not Recommended 5 8 Pair More than 8 Pair Not Recommended gt lt o0 oe t Q Q N KIZ v o o fas fas o Ss 5 gt x lt A WARNING Operating multiple sets of speakers through VC30RIM volume controls with impedance jumpers set to lower values than recommended in order to increase the system s volume capability can damage the volume controls and amplifier If the system pro duces inadequate volume with the jumpers set properly remo
3. share gang boxes with other low voltage controls such as A B speaker switches infrared receivers and line level audio or video devices if these other devices are rated as Class 2 devices according to the National Electrical Code Use the included hardware to mount the volume control in a single or double J box as shown below Do not over tighten the screws Attach your choice of the included Decora or standard hardware Note If you are installing the volume control into a typical plastic J box you will have to remove the J box s back panel to accommodate the control Volume Decora Standard Control Hardware Hardware Backless J Box SETTING THE IMPEDANCE JUMPERS 1 Typical Installations Speakers with Identical Impedance The VC30RIM s impedance adjustments protect the power amplifier by maintaining an overall impedance that s high enough for the amplifier to oper ate safely into The impedance jumper position indicates how much the speaker s original impedance is increased by the volume control The X2 position increases the speaker s impedance 2 times the X4 position increases a speaker s impedance 4 times etc For example a single 8 ohm speaker connected to an amplifier through a VC30RIM with the jumpers set in the X4 e X8 position would present a 32 ohm load to X4 the amplifier If four pairs of 8 ohm parallel through four VC30RIMs set to the X4 position the amplifier would
4. arton If needed you can obtain replacement packaging from us for a small charge Please include a copy of the original bill of sale inside the package 4 Contact United Parcel Service Federal Express or RPS to arrange pre paid not collect shipping Do not use the U S Mail Service IMPORTANT Freight collect shipments will be refused 5 Write the Return Authorization Number on the outside of the shipping carton 6 Ship the packaged unit to Quality Assurance Department Sonance 212 Avenida Fabricante San Clemente CA 92672 7531 WARRANTY COVERAGE U S ONLY If the unit fails due to a defect in workmanship or material for a period of five 5 years Sonance will at its option and at no charge repair or replace the components of such unit which prove to be defective For this warranty to be effective the bill of sale must show that the unit was purchased from an Authorized Sonance Dealer and must list the price paid This warranty shall apply exclusively to the original purchaser and shall not apply to units purchased for industrial or commercial use Furthermore this warranty shall not apply if 1 Damage to the unit was caused by accident abuse or misuse 2 The unit was opened modified or repaired by unauthorized per sonnel or 3 The unit was not used as outlined in the operating instructions EXCLUSIONS AND LIMITATIONS The warranty set forth above is in lieu of all other warranties express or implied
5. down X2 setting or 6dB down X4 setting from maximum Speakers in large rooms and the outside zone X1 setting will still achieve a maximum output level that is equal to the amplifier s full output This allows greater output in needy zones while still providing great low level resolution in the smaller rooms Important All amplifiers need to operate at or above a certain minimum load to remain stable Sonamp amplifiers can handle loads down to 2 ohms before going into protection When balancing rooms or using speakers with differing impedances use the following equation to calculate the overall impedance as seen by the amplifier 1 1 SPa x VCa 1 SPb x VCb 1 SPec x VCc 1 SPn x VCn This equation may look scary but it really is easy to use The nominal speaker impedance is represented by SP and the volume control impedance jumper multiplying factor is shown as VC For example assume that all speakers are 6 ohms nominal Assume that VCa outdoors is set at X1 VCb kitchen is set to X4 and VCc bathroom is set to X8 The equation would be 1 1 6x 1 1 6x 4 1 6x 8 1 1 6 1 24 1 48 1 0 166 0 042 0 021 1 0 229 4 37 ohms The total impedance of this example is above 4 ohms and can be safely driven by any amp that is stable down to 4 ohms Note If you were using a Sonamp 275 SE to drive the load in the above example the amplifier s 2
6. in the 4 pin screw connec tors Make sure to insert the and leads into the correct holes see illustration below Important Make sure there are no FROM AMPLIFIER TO SPEAKERS stray wires that can touch each 5 E other Touching wires can cause a short circuit that can damage the baited bite belted amplifier INPUT as UTPUT Note The connectors can accommo date wire as large as 14 gauge 3 Using a small flat blade screw driver tighten the screws to secure the wires in the connector 4 Press the 4 pin screw connectors into the corresponding speaker terminals on the volume control until they lock into place INSTRUCTION MANUAL VC30RIM IMPEDANCE MULTIPLYING VOLUME CONTROL IMPORTANT Do not reverse the Input and Output connectors or the volume control will not operate properly 5 Connect only 1 pair of speakers to each volume control Connect multiple volume controls to the amplifier s speaker terminals in parallel see illustration below Amplifier Receiver SPEAKER OUTPUT g J VG30RIM Left Right Left Right Speaker Speaker Speaker Speaker MOUNTING IMPORTANT Do NOT install the volume control in the same electrical box as AC house wiring a light switch or any other high voltage device or control The volume control can
7. ng inferior sound quality saturate the volume control transformers and can damage the volume controls the amplifier and the speakers If you hear audible distortion lower the amplifier s volume until the distortion disappears If the system produces inadequate volume with the amplifier s volume set to just below clipping remove some of the speaker volume control combinations from that amplifier and add an additional amplifier s to the system to power them INSTRUCTION MANUAL VC30RIM IMPEDANCE MULTIPLYING VOLUME CONTROL TECHNICAL ASSISTANCE AND SERVICE If you have any questions about the operation or installation of this product please call our Technical Assistance Department on any busi ness day at 800 582 0772 or 949 492 7777 from 7 a m to 5 p m Pacific Time If your product should need repair or service contact your Sonance Authorized Dealer for help or use the following procedure 1 Prior to calling note the product s model number serial number pur chase date and the name and address of the dealer where you pur chased the product 2 Contact our Technical Assistance Department at the above number s and describe the problem the unit is experiencing If applicable they will issue a Return Authorization Number IMPORTANT YOU MUST HAVE PRIOR AUTHORIZATION TO RETURN YOUR PRODUCT TO SONANCE 3 If you re directed to return the unit to Sonance for repair pack the unit in its original shipping c
8. of merchantability fitness for a particular purpose or otherwise The warranty is limited to Sonance products registered herein and specifically excludes any damage to loudspeakers and other allied or associated equipment which may result for any reason from use with this product Sonance shall in no event be liable for incidental or consequential damages arising from any breach of this warranty or otherwise This warranty gives you specific legal rights and you may have other rights which vary from state to state
9. ohm stability would allow you to add even more rooms The number would depend on the speaker impedance and Volume Control impedance jumper setting OPERATION Setting the Maximum System Volume Important After you have set the impedance jumpers as shown on the previous page you must set the maximum system volume before operating the system 1 If the system has speaker volume control combinations in more than one room determine which room will be played the loudest 2 Turn the amplifier s volume control all the way down 3 Feed the system a strong music signal 4 Turn the volume control in the loudest room all the way up 5 Gradually advance the amplifier s volume control until the sound in the room is as loud as you re likely to ever want it e If you hear audible distortion lower the amplifier s volume until the distortion disappears 6 Bring the volume control in each room up to the loudest listening level for that room Leave the volume controls already tested at their loudest listening level as you test new ones and listen for distortion If you hear distortion lower the amplifier s volume until the distortion disappears Once the system has been set up in this way use the volume control in each room to adjust the volume to that room s normal listening level Do not change the amplifier s volume WARNING Operating the system at a volume that causes amplifier clipping will besides produci
10. ve some of the speaker volume control combinations from that amplifier and add an additional amplifier s to the system to power them INSTRUCTION MANUAL VC30RIM IMPEDANCE MULTIPLYING VOLUME CONTROL SETTING THE IMPEDANCE JUMPERS 2 Advanced Installations Speakers with Differing Impedances Room Balancing In addition to protecting amplifiers the VC30RIM s impedance adjustments can also be used in installations to balance the audio levels in different sized rooms or where speakers of differing impedances are used As the impedance seen by the amplifier increases the output from the amp into that load decreases In other words the impedance jumpers X1 setting will allow the speakers to be louder than if the X8 setting is used Here s how to balance out room levels using the VC3ORIM e Use the X1 setting for large rooms and outside areas where maximum volume is needed e Use the X2 and X4 settings for medium sized rooms Use the X8 setting for bathrooms and hallways that need much less overall volume With this technique even though the amplifier will be delivering the same power to all zones the speakers connected to the volume controls in the small rooms X8 setting will only achieve a maximum volume that is 9dB lower than the amplifier s full output That s equal to turning the volume control down three steps from full The speakers in medium sized rooms will achieve a maximum output that is 3dB
11. volume control sets Important Note This volume control is intended for use primarily in background music systems The impedance jumpers increase the impedance seen by the amplifier which reduces the amount of power reaching each pair of speakers reducing the speaker s overall output capability The more speakers being driven by a single amplifier through VC30RIM controls the higher the impedance jumpers must be set and the lower the amount of power that will reach each speaker Operating multiple sets of speakers through VC30RIM controls with jumpers set lower than recommended in order to increase the system s output capability can severely damage the amplifier If the system will include a pair of speakers intended for dedicated higher volume music listening we strongly recommend that those speakers be powered directly by a dedicated amplifier through a VC30R or VC60R standard volume control CONNECTIONS WARNING Turn the amplifier s power OFF until you have completed all of the connections and have determined that they are correct If the amp s AC plug is accessible we recommend that you unplug it from the wall outlet to avoid acci dental turn on and possible damage to the amplifier or speakers The VC30RIM has removable 4 pin screw connectors that simplify connecting the speakers and amplifier 1 Bring the wires from the speakers and amp through a backless J box 2 Insert the speaker wires as shown into the holes
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