B&K Reference 4420 Owner'S Manual Download | Manualshive

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Page 4

1. AC fuse holder

5. RCA inputs (unbalanced)

2. AC Input receptacle

6. Level controls **

3. Speaker outputs

7. Amplifier control muting input/output

4. Balanced inputs

1. AC fuse holder -

Holds the AC Line fuse. This fuse is an 12 Amp / 250 Volt
Slow Blow fuse. Replace with same type and value fuse
only.

2. AC Input receptacle - For attaching the supplied AC power cord to the

amplifier.

3. Speaker outputs -

For connecting the speakers to the amplifier. Explained
further on page 7.

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Summary of Contents for Reference 4420

Page 1: ...B K Components Ltd P N 12692 ...

Page 2: ...B K Components Ltd 2100 Old Union Road Buffalo New York 14227 ...

Page 3: ...e 3 Rear panel view Page 4 Rear panel description Page 4 5 Control muting Page 5 6 Level controls Page 6 Outputs Page 7 Inputs Page 7 8 System installation Page 9 Making the connection Page 9 10 Troubleshooting Page 11 Care and cleaning Page 11 Specifications Page 12 Warranty page 13 Manual and Power cord ...

Page 4: ...o your speakers if the power rating of each individual driver is exceeded by the amplifier Ensure that all the drivers in your speaker system are capable of handling not only the power being delivered by the amplifier but the energy that is likely to be generated during strong passages Turn amplifier off when plugging in or unplugging input and speaker cables The Reference 4420 is equipped with ra...

Page 5: ...igh current MOSFET power output stages It is capable of reproducing the most demanding audio signals at rated power levels Efficient high current transformer for improved dynamics More accurate and three dimensional reproduction of source material Improves low level detail for smoother more musical sound For efficient and linear power delivery Provides short term protection from accidental shortin...

Page 6: ... input output 4 Balanced inputs 1 AC fuse holder Holds the AC Line fuse This fuse is an 12 Amp 250 Volt Slow Blow fuse Replace with same type and value fuse only 2 AC Input receptacle For attaching the supplied AC power cord to the amplifier 3 Speaker outputs For connecting the speakers to the amplifier Explained further on page 7 ...

Page 7: ...trol signal to the Reference 4420 If more than one amplifier is being controlled the control signal can be extended to include each successive unit by simply running an RCA type audio cable from the CTRL OUT connector of the first amplifier to the CTRL IN connector of the next unit commonly referred to as daisy chaining An example of how to connect two amplifiers is illustrated in figure B If a so...

Page 8: ...IN Button position Output status CTRL OUT Signal OUT Sound Signal Signal IN Sound Signal No Signal OUT Mute No Signal No Signal IN Sound Signal The level controls are an option that can be added to the amplifier If your amplifier has this option the balanced inputs are not present There are two level controls on the back of the amplifier One level control for each channel When using the level cont...

Page 9: ...de connector Banana jack Here is a typical amplifier setup Unbalanced RCA type connectors accept line input from the preamplifier s unbalanced output connectors There are two input connectors one for each channel that may be used to connect the amplifier to the preamplifier RCA cable connector Operation For unbalanced operation ensure the balanced switch between the balanced inputs on the rear of ...

Page 10: ...ere are two input connectors one for each channel that may be used to connect the amplifier to the preamplifier Balanced cable connector Operation For balanced operation ensure the balanced switch between the balanced inputs on the rear of the amplifier is in the on in position Here is a typical input setup ...

Page 11: ... the obstructions it must deal with along its run Your dealer can advise you on the products available and their relative merits If building custom length audio cables is not your strength your dealer should be able to help you with that as well When possible use a separate AC power line for the amplifier one that is not shared by any other component in the system of any other house hold component...

Page 12: ...d off Before proceeding to the next step turn the amplifier off and wait 30 seconds for the amplifier to discharge Both the preamplifier and amplifier should be off Connect a playback unit CD VLD Tuner etc to the preamplifier Turn the volume on the preamplifier to minimum Turn on the preamplifier then the amplifier in that order Set source on the preamplifier to the playback unit you ve just conne...

Page 13: ...direction 1 Speakers connected out of 1 Check connections bass weak phase making sure that cables are connected to and to Loud hum or buzz on one 1 Poor ground connection in 1 Check all connectors and or more channels interconnect cables repair as necessary Low output from amplifier 1 Balanced switch in 1 Put balanced switch in balanced mode when correct position using unbalanced inputs Channel so...

Page 14: ...Damping factor 450 Current peak to peak 75 Amps Slew rate 14 V sec Dynamic headroom 1 2 dB S N A weighted 95 dB Voltage gain 28 Line voltage 120 220 240 VAC switchable Dimensions O A 17 w X 15 5 d X 5 75 h Weight 42 lbs Power consumption 650 watts max 6 9 Amps max current draw 70 watts no input Replacement fuses Line 12 Amp 250 Volt Slow Blow Rails 6 Amp 250 Volt Slow Blow ...

Page 15: ...f this warranty and B K shall not be liable for any incidental or consequential damage arising out of a defect in material or workmanship of the unit during the terms of this warranty or thereafter Some States do not allow the exclusion or limitation of incidental or consequential damages and the foregoing exclusions may not apply to you This warranty gives you specific legal rights Your may also ...

Page 16: ...B K Components Ltd 2100 Old Union Road Buffalo New York 14227 716 656 0023 www bkcomp com ...

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