M666

The M666 100 watt audio power amplifier is an ac operated, plug-in module designed for professional applications in the broadcast, motion picture and sound recording industries. The unit represents the continuing development and expansion of the well proven WBS 600 series of modular components and offers a wider scope of selection for monitor amplifiers from this design category. The circuit utilizes differential operational amplifiers to produce an ultra- reliable transformerless design capable of developing a minimum of 100 watts rms to drive an 8 ohm loudspeaker directly Other Ioad impedances (4, 16 ohms, etc:) may be accommodated with appropriate power output inter- polation.

A unique protection circuit incorporated within the M666 activates instantan- eousiy during adverse amplifier load conditions or at a predetermined power output level. The amplifier does not sustain damage even when deliberately shorted at full power output: FEATURES: 10Ow rms direct output into 8 ohms Compact design mounts in standard WBS 57 inch MFGA rack frame Self contained power supply Operational amplifier transformer- less IC design with unique short- circuit protection A combination of conditional frame strapping and a variable front panel level control permits the M666 to operate over an input signal range of OdBm to +20dBm: 1Ok bridging input balanced/ unbalanced The M666 presents a permanent 1Ok ohm impedance at the input and is capa- ble of operating from a balanced or unbalanced source.

The unit exhibits ex- ceedingly uniform frequency response with low noise and distortion over the frequency range 20 Hz to 20kHz: The modest size of 8.5W x SHx13.7Dinches allows two M666 monitor amplifiers to be accommodated in one standard rack mounting (19W x 5.25H) MFGA equipment frame: Active elements contained on plug- in subsidiary PC card Hes M666

The M666 100 watt audio power amplifier is a ac operated, plug-in module designed for professional applications in the broadcast, motion picture ad sound recording industries: The unit represents the continuing development and expansion of the well proven WBS 600 series of modular components and offers a wider scope of selection for monitor amplifiers from this design category. The circuit utilizes differential operational amplifiers to produce a ultra- reliable transformerless design capable of developing a minimum of 100 watts rms to drive a 8 ohm loudspeaker directly.

Other load impedances (4, 16 ohms, etc:) may be accommodated with appropriate power output inter- polation. A unique protection circuit incorporated within the M666 activates instantan- eously during adverse ampli ifier load conditions or at predetermined power output level: The amplifier does not sustain damage even when deliberately shorted at full power output A combination of conditional frame strapping and variable front panel level control permits the M666 to operate over an input signal range of OdBm to +20dBm: The M666 presents a permanent 10k ohm impedance at the input and is capa- ble of operating from balanced or unbalanced source.

The unit exhibits ex- ceedingly uniform frequency response with low noise and distortion over the frequency range 20 Hz to 20kHz: The modest size of 8.5Wx SHx13.7D inches allows two M666 monitor amplifiers to be accommodated in one standard rack mounting (19W x 5.25H) MF6A equipment frame FEATURES: 10Ow rms direct output into 8 ohms Compact design mounts in standard WBS 5% inch MFGA rack frame.

Self contained power supply Operational amplifier transformer- less IC design with unique short- circuit protection 10k bridging input balanced/ unbalanced Active elements contained on plug in subsidiary PC card 24#

The M666 00 walL audio Nutfi amplitier i5 an #C operated, plug in module designen tor professiona applications the broadcast motion picture and 5 @uO recordinq industries FEATURES: 10Ow' Fms cirect output Into 8 &hs The unLrepresents the continuing dei lopment and expansion 0f the well prDven WBS 600 suries modula coinonents and ofters wider #opt ection tar monitor amplifiers from this design category The circuit utilizes differential operational amoli fiers procluce lta reliahle transtarmerless design apable 0i ucveioping Minimum 1@O wvatts drave an ohm loudspeaker directly- Otner loau ipedances (4, 16 chm may D accommnodated with appropriate DDIC output Intcr aliona Compact design nounts in standard WBS Sinch MFGA rack frame.

Selt contained pover supplv unique pratection circuit incarporated within the MG6G activates instantan eously during adverse ampli fied condetiont prede termined nowei output level. The amplific LOCG "0L susiain damage even when delibe acy shorted at full nower autput- Operational amplifier transtarmet- less IC design with unique shor[ citcui protectian cambinalon conditional trame strapjpiny variable front panel level control permits the M666 pnetate input signal FatIUC OdBm +20dBm The M666 presents permanent I0k ahmn impedanc the input and capa" aperating Irom Jncd unbalanced SOurce The Unit exhibits ex- ceedingly uniform frequency respOrse wvith low noise andl distortion over thu Treuvicncy jne: 20 Hz to 20kHz; 1Ok bridging input balanced/ ubalanced Active elements comuined on piug- ~subsidiary PC card The modest Siz 0f SW x SHx13/Dinches allows two M666 monitor am lifiers Io he accommodalud 1rI Orc Standard rack mounting (19W 25H41 MFGA equipment frame

GAIN 50dB matched gain Front panel variable control FREQUENCY RESPONSE +0.25dB from 2OHz to 20kHz NOISE 90dB below 1OOW at maximum gain (reduces with front panel control) TOTAL HARMONIC DISTORTION Less than 0.25% from 20Hz to 20kHz at any power level up to 1OOW INPUT LEVEL OdBm nominal, 20dBm maximum for 1OOW output level SOURCE IMPEDANCE 600 ohms or less balanced or unbalanced INPUT IMPEDANCE 1OK ohms balanced to ground OUTPUT IMPEDANCE Less than 0.1 ohm PHASING The low terminal number of the input pair is in phase with the direct output terminal_ POWER REQUIREMENTS 115V ac, 6OHz, 2OOVA AMBIENT TEMPERTURE 0o to 600C DIMENSI ONS 8.5W x SH x 13.70 inches WEIGHT 10 Ibs_ net: ACCESSORIES: MFGA 600 Series Mounting Frame 19W x 5.25H x 14.5D (less rear cable tray ad cover) Standard EIA rack mounting: Accom- modates two M666 modules or ay combination of single, double or quadruple units not exceeding ten single width modules.

MFR6600 Series Frame Receptacle_ Two required per M666. WARD-BECK SYSTEMS LTD_ WARD-BECK SYSTEMS INC_ 841 Frogress Ave;. Scarboraugh, Ont M1H 2x4 290 Larkin St. Buffalo; New York 14210 Telephone: (416) 438-6550 Telex: 06-23469 WBS

GAIN 50dB matched gain Front panel variable control INPUT IMPEDANCE 1OK ohms balanced to ground OUTPUT IMPEDANCE Less than 0.1 ohm FREQUENCY RESPONSE +0.25dB from 2OHz to 20kHz NOISE 90dB below 1OOW at maximum gain (reduces with front panel control) TOTAL HARMONIC DISTORTION Less than 0.25% from 20Hz to 20kHz at any power level up to 1OOW INPUT LEVEL OdBm nominal, 20dBm maximum for 1OOW output level SOURCE IMPEDANCE 600 ohms or less balanced or unbalanced PHASING The low terminal number of the input pair is in phase with the direct output terminal: POWER REQUIREMENTS 115V ac, 6OHz, 2OQVA AMBIENT TEMPERTURE 00 to 600C DIMENSI ONS 8.5W x SH 13.70 inches WEIGHT 10 Ibs_ net ACCESSORIES: MFGA 600 Series Mounting Frame 19W x 5.25H x 14.5D (less rear cable tray and cover) Standard EIA rack mounting: Accom- modates two M666 modules or any combination of single, double or quadruple units not exceeding ten single width modules.

MFR6 600 Series Frame Receptacle Two required per M666. WARD-BECK SYSTEMS LTD; WARD-BECK SYSTEMS INC_ 841 Progress Ave,Scarborough,Ont M1H 2x4 290 Larkin St:, Buffalo; New York 14210 Telephone: (416) 438-65SO Telex: 06-23469 WBS

GAIN 5OdB matched gain Front DJMC variable control FREQUENCY RESPONSE 40.250B Trom 20Hz Z0kHz NOISE gOuB OoW mnaMTMM JJin (reduces with front panel controll TOTAL HARMONIC DISTORTION Less than 25"" from 20Hz t0 20kHz pDaV up t0 100w INPUT LEVEL QdBm nominal; 20dBm maximum tor IDOW output level SOURCE IMPEDANCE G00 ohns balanced unbalanced INPUT IMPEDANCE TOK ohins balanced ground QUTPUT IMPEDANCE Less than phm PHASING The low Tmina numnbe the input pait the direct output terminal: POWER REQUIREMENTS 115v aC 60H42, 200VA AMBIENT TEMPERTURE G00C DIMENSI ONS 8.5W x SH 13.70 inches WEIGHT 10 Ibs ncl phuse ACCESSORIES: MFGA 600 Series Mounting Frame !9W 25H 14.5D (less rear cable trav and coveri Standard EIA rack mounting ACCOITI modate M666 modules comhination of single, douhle quadrunle unnsno exceeding single width modules MFRG-600 Series Frame Receptacle.

Twa required per M666. WARD BECK SYSTEMS LTOF WARD BeCK SYSTEMS INC EiFronce3e DE ScardorounOnr NAZX4 ZJ0 Lerkin SL Hurini? QAF Teechone (4161 433-6550 cex 0G-F33469 WBS JJ+