Leak 2000 receiver

The Leak 2000 Tuner-Amplifier has been manufactured to the highest specifications and includes the most comprehensive facilities.

Amplifier Section

The powerful 35 watts per channel amplifier is of advanced design, using modern technology power transistors and direct coupling to the loudspeakers. This provides exceptional power band width and damping factor down to the lowest audio frequencies. The wide band width design of the amplifier ensures minimum intermodulation distortion and very low harmonic distortion through the audio spectrum. Incorporated in the amplifier is special protection circuitry, this prevents damage to the bass speaker unit and prevents damage or fuse blowing within the amplifier in the event of a short circuit occurring.

 

Tuner Section

The tuner section incorporates numerous advanced technical features. The high quality front end, incorporating an FET provides high sensitivity with excellent stability. The IF circuitry is designed round a 14 pin integrated circuit using state of the art. Technology. The phase locked loop-stereo decoder provides high stability of stereo separation.

 

Special facilities for extending your hi-fi system

The 2000 Tuner-Amplifier includes special facilities for extending the uses of your hi-fi system.

Auxiliary input - this may be used for connecting an additional item of equipment, for example a television fitted with sound output facility.

Normal/Matrix Switch - when this switch is pressed, the speaker 2 connections are modified, allowing the loudspeakers connected to the speaker 2 sockets to operate as the rear-channels in a simulated 4-channel system. This provides a good simulation of concert hall reverberation effects

Preamplifier and Main Amplifier Normal/Separate switch - this allows flexibility in the use of the tuner-amplifier. With the switch in the Out (normal) position, it operates in its normal mode.

With the switch in the IN (separate) position, the preamplifier output is no longer connected to the main amplifier. A particular use of this facility is the interconnection with a rear channel amplifier, containing a matrix decoder (e.g. for SQ or QS systems), for the reproduction of quadraphonic sound (4-2-4 system).

The normal/matrix and the normal/separate switches give the option therefore of two types of 4-channel sound.

Variable level FM muting control - when the mute button is depressed, rotating the mute level control clockwise increases the minimum threshold level of signal the receiver will accept. Location of local transmissions is then made easier by the elimination of remote broadcasts.

 

Specifications

Output Power both channels sine wave driven at 1 kHz) :

40 +40 watts at 4 Ω  speakers

35 + 35 watts at 6 Ω  speakers

30 +30 watts at 8 Ω  speakers

Single Channel Mode : 80 watts

Total Harmonic Distortion :

All  power up to 30 watts, 1 kHz  ; 0,1%

At 1 watt, 1 kHz :  0,01%

At 30 watts, 10 kHz :  0,1%

Intermodulation Distortion (70 Hz and 5 kHz in ratio 4:1) :  0,1%

Power Bandwidth:  2 dB down relative to 35 watts : 10 Hz to 40 kHz (9,5% T.H.D. both channels driven)

Damping Factor:  40 (measured at 80 Hz)

Residual Hum and Noise (Volume control minimum):  1 mV max

Control Amplifier (-40 dB volume setting)

Treble Control:  ±13 dB at 15 kHz

Bass Control :  ±13 dB at 50 Hz
Main Amplifier Input:

Sensitivity :  830 mV (for 35 watts)

Input Resistance :  47 k Ω

Frequency Response (-2 dB) :  20 Hz - 50 kHz)

Hum and Noise : -90 dB

Crosstalk (at 10 kHz) :  - 50 dB

Disc Input

Sensitivity (at 1 kHz for 35 watts) :  2,2 mV or 6 mV

Input Resistance :  47 k Ω

Frequency Response:  Compensated to IEC 98 fine groove characteristic

Hum and Noise:  better than -65 dB

Input Overload Margin :  +35 dB

Crosstalk (at 10 kHz) :  -35 dB

Tape, Cassette, Aux Inputs

Sensitivity (for 35 watts):  140 mV

Input Resistance :  100 k Ω

Frequency Response :  25 Hz - 40 kHz (±1,5 dB)

Hum and Noise :  better than -800 dB

Crosstalk (at 10 kHz):  -40 dB

Alternative Aux Sensitivity:  550 mV

Tape Cassette Output

Output High :  140 mV

Output Low (DIN standard) :  1,4 mV / k Ω

FM Tuner

Frequency Range:  87,5 to 108 MHz

Sensitivity:  1,6 µV (30 dB signal/noise)

Mono Distortion (1 kHz) :  0,5%

Stereo Distortion (1 kHz) :  0,5%

Hum and Noise :  better than -65 dB (relative to 75 kHz deviation, 1 mV rf input)

Image Rejection :  -45 dB

IF Rejection:  _60 dB

Alternate Channel Rejection :  -50 dB

AM Rejection :  -50 dB

Capture Ratio :  1,5 dB

AFC Ratio :  2,5 to 1

Mute Level Range :  5 µV to 50 mV

De-emphasis :  50 micro-seconds

Frequency Response :  40 Hz - 14 kHz (±1,5 dB)

Pilot Sensitivity :  5 % modulation

SCA Rejection :  -70 dB

Channel Separation :  35 dB minimum (1 kHz); 30 dB (10 kHz)

Quasi Stereo Separation :  20 dB (1 kHz); 4 dB (10 kHz)

AM Tuner

Frequency Ranges

Long Wave :  150 to 350 kHz

Medium Wave :  510 to 1650 kHz

Sensitivity :  20 µV (20 dB signal/noise)

Image Rejection :  -40 dB

IF Rejection :  -40 dB  (at 1 MHz); -30 dB (at 220 kHz)

Selectivity :  25 dB

AF Bandwidth (-3 dB) :  3 Hz

Dimensions (W x H x D):  471 x 132 x 292 mm (18,8" x 5,3" x 11,7")

Weight:  9,7 kg (21,5 lb)