SRM-80A / E ­ SIGNAL ROUTER/MONITOR Owner's Manual SRM-80A SIGNAL ROUTER / MONITOR ROUTER / MONITOR SERIES SRM-80A / E ­ SIGNAL ROUTER/MONITOR INTRODUCTION Congratulations on your purchase of a Furman Model SRM-80A Signal Router/Monitor. Your SRM-80A will make monitoring, mixdown, and dubbing simpler and faster, thus helping you achieve professional results. ABOUT THE SRM-80 The SRM-80A facilitates mixdown and dubbing between different media types without tying up additional console channels. By connecting the control room outputs of your mixer, inputs and of up to three power amplifiers or powered speakers, speaker outputs of one stereo power amplifier, and up to three pairs of speakers, you will have a highly useful and sophisticated audio playback monitor system. Multiple copies can be made simultaneously through use of the SRM-80A's four rotary SYSTEM SETUP 1 MO N I TOR LI E OUTPU T A N PO W ERE D S PEAKERS SPEAKER B OUTPU T PA SSI VE S PEAKERS SPEAKER C OUTPU T PA SSI VE S PEAKERS I PU T N PO W ER AM PLI FIER OU TPU T H EAD PH O N ES MO N I TOR LI E OUTPU T B N MO N I TOR LI E OUTPU T A N FROM AM P( B) OU TPU T OU TPU T TO "A" N I FROM "A" OUT I PU T N SET S I H W TC TO SPK- C B/ SRM -80 A TO SOURCE I N FROM "C " OUT TO "C " N I OU TPU T I PU T N D AT RECOR D ER OU TPU T TO "B" N I FROM "B" OUT I PU T N FROM "D " OUT TO "D " N I OU TPU T MIN ID ISC I PU T N C ASSE TTE RECOR D ER SRM RU SOURCE MIXER COM PA C T D ISC PLAYER RECOR D ER - 1 SRM-80A / E ­ SIGNAL ROUTER/MONITOR STEP-BY-STEP GUIDE TO SET-UP USING SINGLE POWER AMP Please also refer to the "System Set-Up #1" drawing on the facing page. Cables needed: 2 Pair: 1 Pair: 6 Pair: 2 Pair: 1 Pair: 1 Pair: 1 Pair: Speaker to Binding Posts, the banana plug type (Speakers B, C) 1/4" TRS Balanced to Monitor Line output "A" (Powered Speakers) RCA I/O to Devices 1/4" TRS Balanced to Device "A" L/R I/O 1/4" TRS Balanced to "SOURCE" L/R Input 1/4" TRS Balanced to Power Amp L/R Inputs Power Amp Out to "FROM POWER AMP OUT" Binding Posts (banana plugs) Make sure SRM-80 and all other devices are switched "OFF" before making any cable connections. Decide which devices will be labeled "A", "B", "C", and "D". Device "A" should be any pro level balanced units, such as a DAT machine. Label the Output Select Switch and the speaker pairs on the front panel tabs. Use adhesive labels so you can relabel for different configurations. Mount the SRM-80 in your rack. Depending on your setup, it may be easier to cable all your gear before mounting the SRM-80 in your rack. Otherwise, go ahead and mount it now. Set AMP/SPK - B/C Switch to SPK - B/C. Connect passive speaker cables to "SPEAKER C" and "SPEAKER B" Binding Posts. Connect Power Amp L/R Output cables to "FROM AMP OUTPUT" Binding Posts. If you have the optional SRM-RU remote unit, which we highly recommend, connect its 5-Pin cable to "REMOTE." Connect 1/4" TRS Balanced cables from your powered monitors to MONITOR LINE OUTPUT "A" L/R. Connect 1/4" TRS Balanced cables from MONITOR LINE OUTPUT "B" L/R to your power amp "IN" L/R. Connect RCA cables from "L/R In/Out" to devices "B", "C", and "D", according to your setup plan. Connect 1/4" TRS Balanced cables from "A" L/R, I/O to device "A" Connect 1/4" TRS Balanced cables from "SOURCE" L/R to source device. (e.g. mixing console stereo out or soundcard out). Set the Ground Lift Switch to the position that reduces any hum or buzz. Set the "0db / +4db" switch to the appropriate meter scale for the equipment being used. Power up your equipment, being sure to turn on your power amp last. Set "SPEAKER TRIM" controls at about 75%. After powering up the system, adjust levels as needed. To dial in your speaker levels use broadband pink noise and sound level meter. The Alan Parsons/Stephen Court alignment CD is very good, and a decent meter can be had for about $40 at Radio Shack. For using more than 1 pair of power speakers or multiple power amps see System Set-up #2 on the next page. 2 SRM-80A / E ­ SIGNAL ROUTER/MONITOR source select knobs labeled OUTPUT SELECT A through OUTPUT SELECT D. Monitoring any of these sources can be done using the MONITOR SELECT knob, highpower headphone amp and uniquely thoughtout speaker selection system that consists of three balanced line level speaker outputs A, B, and C. All of these outputs are compatible with powered monitors or passive speakers using a power amp. The unique feature is that the B and C outputs can be combined into one output for use with 2 pairs of passive speakers and only one power amp. See description of B/C AMP/SPK Switch. Each monitor speaker output has its own front panel trim control, so equal listening levels can be maintained despite differences in speaker efficiencies. The SRM-80A has balanced inputs for the SOURCE and A inputs, and balanced outputs for channel A output and A, B, and C monitor line outputs. INPUTS B through D utilize unbalanced RCA jacks. The SRM-80A allows easy signal routing between these dissimilar jacks. SYSTEM SETUP 2 MO N I TOR LI E OUTPU T A N PO W ERE D S PEAKERS MO N I TOR LI E OUTPU T B N PO W ERE D S PEAKERS PASSI VE S PEAKERS PO W ER AM PLI FIER MO N I TOR LI E N OU TPU T B MO N I TOR LI E OUTPU T A N I UT NP MO N I TOR LI E N OU TPU T C OU TPU T H EAD PH O N ES OU TPU T TO "A" N I FROM "A" OUT I UT NP SET S I H W TC TO AM P- C B/ SRM -80 A TO SOURCE I N FROM "C " OUT TO "C " N I OU TPU T I UT NP D AT RECOR D ER OU TPU T I TO "B" N FROM "B" OUT I UT NP FROM "D " OUT TO "D " N I OU TPU T MIN ID ISC I UT NP C ASSE TTE RECOR D ER SRM RU SOURCE MIXER 3 COM PAC T D ISC PLAYER RECOR D ER - SRM-80A / E ­ SIGNAL ROUTER/MONITOR The SRM-80A provides a high-resolution 40 LED x 2 bar graph meter to display the signal selected for listening. The meter displays a pre-fader signal for accurate monitoring of the signal going to tape or disc. This meter has true VU ballistics, or can be switched to Peak Program Mode via the front panel toggle switch. The meter also features a slow release-time Peak Hold function to allow easy verification of critical levels. The SRM-80A's MONO SUM feature provides the ability to check for radio compatibility, and is a good spot check to see how you've messed up the stereo image! (Only the sends to the speakers are affected.) While radio airplay is nearly always stereo these days, phasing problems and odd panning arrangements can show up in less than ideal listening environments, such as cars, and many locations in nightclubs. The SRM-80A also features a DIM switch to allow an easy way to lower the level to the speakers (but not the headphones) temporarily without disturbing any level controls. Balanced Buffers Source 1/4" TRS Input A 1/4" TRS Unbalanced Buffers Input B RCA Input C RCA Input D RCA 0 VU = 0dBu 0 VU = +4dBu Input to Output Routing Switches Connect any Input to any Output --EXCEPT-- A cannot send to A, B cannot send to B etc. B C D S Routing Select 4 position (4 switches) Monitor Select 5 position S Floating Bal. output Stage, 0dB gain Outputs A 1/4" TRS B RCA C RCA D RCA A B C D VU / PPM Meter +6dB gain Volume Control and Mono Sum Mono Control +6 dB gain Speaker Amplifier VCA and floating balanced output stage Headphone Volume and Amplifier +6dB gain Amplifier Select Relays Headphone (Front Panel, 1/4" TRS) Amp A 1/4" TRS Remote Control 5 Pin DIN Push button switches (Amplifier Select, Mono, Dim) Amplifier Level Trim Pots Gain Control for Amp A vs B vs C and DIM Select Amp A vs Amp B/C Select Amp / Spkr B/C Amp B/C or Speaker B/C Low level Relay Amp B 1/4" TRS Amp C 1/4" TRS Amp B Output 5 way post To Speaker B 5 way post High level Relay To Speaker C 5 way post 4 SRM-80A / E ­ SIGNAL ROUTER/MONITOR OPTIONAL SRM-RU REMOTE CONTROL The optional five-button SRM-RU allows remote control of Speaker Selection, MONO and DIM. An LED indicator is provided for each button and a 10 foot cable is included. ring the panel when tightening the screws, use nylon washers under the screw heads. SAFETY INFORMATION WARNING (For domestic units only): Do not remove the third prong on the SRM-80A's AC plug. Never use a 3-prong to 2-prong AC plug adapter to plug your SRM-80A into your wall socket. The unit requires that a safety ground be present for proper operation. Any attempt to operate it without a safety ground is considered improper operation and could invalidate the warranty. ABOUT THIS MANUAL We want to make it easy for you to set up your SRM-80A. Page Two of this manual tells you how to do just that, step-by-step. Page four gives you detailed information on all of the features, controls and connectors. You can set up your SRM-80A first, and read about the controls afterwards or even better, just resume recording and mixing! FRONT PANEL CONTROLS OUTPUT SELECT A: Use this input/output for balanced, pro level devices. This four-position knob determines which signal is routed to the device plugged into the 1/4" "A" OUTPUTS on the SRM-80A's rear panel. For example, if the "A" OUTPUTS are used for a DAT machine, the INSTALLATION The SRM-80A is intended for mounting in standard 19" equipment racks. To avoid mar- SW I H SETTIN S FO R M U LTIC A SSE TTE D U BBING TC IN G I C ASSE TTE REC O RD ER IN PUT D IN PUT C IN PUT - B IN PUT D IN PUT C IN PUT A C ASSE TTE REC O RD ER IN PUT D IN PUT - B IN PUT A C D PLAYER IN PUT C IN PUT - B IN PUT A D C B A SOU RCE M O NI R TO SELEC T OUTPUT SELEC T A OUTPUT SELEC T B OUTPUT SELEC T C OUTPUT SELEC T D SET OUTPUT SELEC T SW I C H ES T B AN D C TO IN UT - .TH I W I P D S LL ROUT TH E C D PLAYER TO B H OT C ASSE TTE D EC KS C O NN EC TED TO TH E B AN D C OUTPUT S SET M O NI R SELEC T SW I H TO TC TO D TO LI EN TO WH AT S ST I BEIN REC O RD ED TH ROU GH TH E IN G SPEAKERS AN D H EAD PH O N ES 5 SRM-80A / E ­ SIGNAL ROUTER/MONITOR DAT can receive signals from device "Source", "B", "C", or "D" INPUTS depending on where you position this knob. OUTPUT SELECT B: This four-position knob works like the output select "A" knob described above. For example, if the "B" RCA OUTPUTS on the back panel are used for a cassette recorder, the recorder can receive signals from stereo device Source, "A", "C", or "D" INPUTS. OUTPUT SELECT C: The SRM-80A's "C" OUTPUTS can receive signals from device "Source", "A", "B", or "D" INPUTS depending on where you position this knob. For example, if the "C" RCA OUTPUTS on the back panel are used for a MiniDisc recorder, the recorder can receive signals from stereo device "Source", "A", "B", or "D" INPUTS. OUTPUT SELECT D: The SRM-80A's "D" OUTPUTS can receive signals from device "Source" "A", "B", or "C" INPUTS. For example, if the "D" RCA OUTPUTS on the back panel are used for a CD player/recorder, the recorder can receive signals from stereo device "Source", "A", "B", or "C" INPUTS. MONITOR SELECT: This five-position knob allows you to select which device you will hear through your speakers and headphones, the main console or soundcard mix (Source), or the output of any devices "A" through "D". LISTENING LEVEL: Controls the loudness level you hear through your speakers. It does not affect the signal going to any of the stereo devices connected to the SRM-80A. MONO: Changes the sound you hear through your speakers (not in the Headphones) from stereo to monaural. DIM: Attenuates the loudness of your speakers by about 15 dB, without affecting the level of the signals going to any of the stereo devices or headphones connected to the SRM-80A. This is a very useful feature if you are interrupted while monitoring, mixing, or dubbing. MONITOR LEVEL: This high-resolution, 40 x 2 LED bar graph meter allows precise pre-fade level calibration for all stereo devices connected to the SRM-80A. METER MODE: Located to the right of Monitor Level Meter, this switch can be set for the meter to display AVG (VU) or Peak Mode. SPEAKERS A, B, and C: Selects between amplifier / speaker outputs A, B, or C. TRIM LEVELS: Adjusting these "Set Once" controls allows you to set all three pairs of amplifiers/speakers to the same listening level. HEADPHONES: Plug your headphones in here. The high-power headphone amp provides excellent audio quality and can drive low-impedance phones with ease. It may be wise to disconnect your headphones to avoid damage when not in use. HEADPHONE LEVEL: Adjusts the listening level of the headphones. REAR PANEL CONTROLS AND CONNECTIONS GROUND LIFT: Allows separation of chassis ground from audio ground and can be used to reduce hum or buzz. Remember, never remove the third prong on the SRM-80A's AC 6 SRM-80A / E ­ SIGNAL ROUTER/MONITOR plug. Never use a three-prong to two-prong AC plug adapter to plug your SRM-80A into your wall socket. ON/OFF: Controls power to unit. AMP-B/C & SPK-B/C SWITCH: When the B/C switch is in the AMP-B/C position: The input selected by the Monitor Select switch is routed through the Monitor level control and sent to the ...