Krell Industries S-275 Instructions For Use Manual Download

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Figure 1 The S-275 Front Panel

S-275

KRELL

Figure 2 The S-275 rear panel

S-275

KRELL

Krell S-275

Front Panel

Power Button

Power Indicator

Rear Panel

Mono/Stereo Switch

Gain Switch

Input Switch

Left and Right Balanced
Analog Inputs

Left and Right Single-
ended Analog Inputs

12 VDC Trigger In/Out

Power

Main Power Switch

10 Speaker

Connectors

Right/Mono Speaker Fuse

Left/Mono Speaker Fuse

IEC Connector

Summary of Contents for S-275

Page 1: ...THE LEADER IN AUDIO ENGINEERING S 275 Stereo Power Amplifier Instructions for Use Owner s Reference ...

Page 2: ...d allows circuit elements to operate at the same temperature result ing in more accurate signal transfer and enhanced reliablilty The S 275 is a slim line design allowing two amplifiers to fit into a space normally occupied by one For systems requiring higher power the S 275 can be configured for monaural operation by set ting a switch on the rear panel Power output increases to 550 Watts into 8 O...

Page 3: ...standard for professional and sound recording instal lations balanced connections have 6 dB more gain than single ended connections and allow the use of long interconnect cables Balanced connections are completely immune to induced noise from the system or the environment Single ended A two wire input or output circuit Use care when using single ended connections as the ground connection is made l...

Page 4: ... is in the operational mode and is ready to play music 12VDC Trigger The S 275 may be turned on remotely via a 12 volt trigger Connect the 12V trigger output from a compatible device to the 12VDC trigger input The S 275 will go from stand by to opera tional mode when a 12 volts signal is applied The S 275 will return to Stand by when the 12 volt signal is removed The S 275 can turn on other device...

Page 5: ...e Quick Setup Guide and the warranty registration card 2 Grasp the underside of the amplifier and lift it straight out of the packing box 3 Place the amplifier in a safe location and remove the protective plastic wrapping If any of these items are not included please contact your authorized Krell dealer Save all packing materials If you must ship your S 275 in the future repack the unit in its ori...

Page 6: ...plifier as close to the loudspeakers as possible and keep loudspeaker cable lengths to a minimum Loudspeaker cable adds impedance to the load the amplifier must drive regardless of the cable s gauge All Krell amplifiers drive the lowest impedances with ease but long loudspeaker cables reduce the maximum power that can be delivered to the loudspeakers The S 275 has superb regulation and does not re...

Page 7: ... Power Button 2 Power Indicator Rear Panel 3 Mono Stereo Switch 4 Gain Switch 5 Input Switch 6 Left and Right Balanced Analog Inputs 7 Left and Right Single ended Analog Inputs 8 12 VDC Trigger In Out Power 9 Main Power Switch 10 Speaker Connectors 11 Right Mono Speaker Fuse 12 Left Mono Speaker Fuse 13 IEC Connector ...

Page 8: ...gle monaural power amplifier 4 Gain Switch In stereo the amplifier provides 19 8 dB of gain at 0d dB setting and 25 8 dB of gain at 6 dB setting In mono the amplifier pro vides 25 8 dB and 31 8 dB of gain at the 0 dB and 6 dB settings respectively 5 Input Switch Set this switch for the style of connection being used balanced XLR or single ended RCA 6 Left and Right Balanced Analog Inputs The S 275...

Page 9: ...ge the S 275 from off to the stand by mode 10 Speaker Connections The S 275 is equipped with standard binding posts for each ampli fier channel These connectors accept bare wire pins banana plugs or spade lugs Use the red terminal for the positive connec tion and the black terminal for the negative connection When in monaural mode use the left channel s red connectionfor poitive and the right chan...

Page 10: ...ive for mono operation 10 The S 275 is equipped with standard binding posts for each amplifier channel These connectors accept bare wire pins banana plugs or spade lugs Use the red terminal for the posi tive connection and the black terminal for the negative connec tion When in monaural mode use the left channel s red connec tionfor poitive and the right channel s red connection for nega tive 4 Co...

Page 11: ...ly attenuated Krell amplifiers have large reserves of clean power and can safely drive loudspeakers to higher sound pressure levels than other amplifiers However use care when setting high playback levels and lower the vol ume level at any sign of loudspeaker distress When powering up any system always turn amplifiers on last When powering down always turn amplifiers off first When the amplifier i...

Page 12: ...nd are of sound construction With the amplifier off remove the interconnect cables then turn the amplifier on If the hum disappears turn the amplifier off and reinsert one of the interconnect cables Turn the amplifier back on If the hum reappears with one or both cables reinserted there may be a defective cable Have the interconnect cables checked before proceeding If the interconnect cables are s...

Page 13: ...roduct outside the U S A and wish to have it serviced at the factory all freight and associated charges to the factory are your responsibility Krell will pay return freight to the U S A based freight forwarder of your choice Freight and other charges to ship the unit from the freight forwarder to you are also your responsibility Krell is not responsible for any damage incurred in transit Krell wil...

Page 14: ...artment have been made in advance Proof of pur chase will be required for warranty validation at the time of hand delivery Use the original packaging to ensure the safe transit of the product to the factory dealer or distributor Krell may at its discretion return a product in new packaging and bill the owner for such packaging if the product received by Krell was boxed in nonstandard packaging or ...

Page 15: ...o Max 1 900 W TRANSFORMER 1 650 VA INPUTS 1 pair balanced via XLR connectors 1 pair single ended via RCA connectors OUTPUTS 2 loudspeaker via 5 standard binding posts OUTPUT VOLTAGE Peak to peak 133 V stereo Peak to Peak 188V mono OUTPUT POWER 275 550 WPC 8 4 Ohms stereo 550 1 100 WPC 8 4 Ohms mono REMOTE CONTROL 1 12 VDC trigger Ouput 1 12 VDC trigger Input Krell Industries LLC 45 Connair Road Or...

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