Rotel RKB-250 - page 14

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RKB-250 Power Ampliﬁer

Speciﬁcations

Continuous Power Output into 8 ohms

(20-20k Hz, < 0.03% THD)

50 watts/ch into 8 ohms, all channels driven

Continuous Power Output into 4 ohms

(DIN 1 kHz,1.0% THD)

90 watts/ch into 4 ohms, all channels driven

Total Harmonic Distortion

(20Hz-20kHz, 8 ohms)

Continuous rated power: < 0.03%

One-half rated power: < 0.03%

1 watt power: < 0.03%

Intermodulation Distortion

(60 Hz : 7 kHz, 4:1)

< 0.03%

Damping Factor

(20-20,000 Hz, 8 ohms)

>200

Input Impedance

20 k Ohms

Input Sensitivity

1.0 volt

Ampliﬁer Gain:

26 dB

Input Overload Level

5.0 volt

Peak Current

> 25 A

Frequency Response (±1 dB)

10Hz-100kHz

S/N Ratio (IHF A)

115 dB

Crosstalk/Separation

> 70 dB

Speaker Impedance

4 ohms minimum

Auto Turn On Level (with all inputs)

3 mV input signal

Power Requirements

USA: 120 Volts, 60 Hz

Europe: 230 Volts, 50 Hz

Power Consumption

190 Watts

Idle: 22 Watts

Standby: 2.3 Watts

Dimensions (W x H x D)

(not including rack adaptors)

430 x 100 x 322 mm

16.9 x 3.9 x 12.7 in

Weight (net)

8 kg, 17.6 lb.

Panel Height

2U, 88.1 mm/3.5 in

When sizing openings in custom cabinets, mea-

sure the unit to be installed and/or allow at least

1 mm clearance on all sides for unit to unit toler-

ances.

All speciﬁcations are accurate at the time of print-

ing. Rotel reserves the right to make improve-

ments without notice.

Rotel and the Rotel HiFi logo are registered trade-

marks of The Rotel Co, Ltd., Tokyo, Japan.

Troubleshooting

Most difﬁculties in audio systems are the result

of poor or wrong connections, or improper

control settings. If you encounter problems,

isolate the area of the difﬁculty, check t he

control settings, determine the cause of the

fault and make the necessary changes. If you

are unable to get sound from the RKB-250,

refer to the sugges tions for the follo wing

conditions:

Front Panel Power Indicator Is

Not Lit

No main power to the RKB-250. Check AC

power connections at the ampliﬁer and the

AC outlet. Check the front panel power switch.

Make sure that it is set to the ON position.

If using signal sensing auto power-on, make

sure that a signal is present at the inputs. If

using 12V trigger power-on, make sure that

a trigger signal is present at rear panel +12V

connection.

No Sound

If the amp is getting AC power, but is pro-

ducing no sound, check the PROTECTION

INDICATORS on the front panel. If lit, see be-

low. If not, check all of your connections and

control settings on associated components.

Make sure that your input connections and

speaker conne ctions match your select ed

stereo/mono conﬁguration.

Protection Indicators are Lit

The front panel PROTECTION INDICATORS

light when the RKB-250 protection circuits have

shut off the ampliﬁer. Typically, this occurs only

when the ventilation openings are blocked,

when there is faulty speaker wiring, or after

a period of extreme use. Turn off the system

and wait for the amp to cool. Then push the

front panel power switch in and out to reset

the protection devices. If the problem is not

corrected or reoccurs, there is a problem with

the system or the ampliﬁer itself.