Lafayette LA-226C

Features:

Dual 20 watt Stereo Amplifier

FM/AM Tuner with built-in FM Multiplex

Duplex 3-gang tuning condenser provides tuned RF stages for greater sensitivity and selectivity on FM and Am

Automatic Stereo monitor

17 front panel controls

20 tubes plus 8 diodes

Just add a turntable and speakers for a complete stereo system

The  Lafayette LA-226C is a self-contained instrument designed for the control and reproduction of all stereophonic and monophonic sources. Features a "pilot monitor"  stereo indicator which tells you instantly whether or not an FM station is broadcasting in stereo multiplex. The receiver section consists of an AM/FM tuner with built-in multiplex which provides more than 30 dB separation at 400 cycles. A sensitivity of 2 µV for 20 dB of quieting is achieved by the FM circuit with AFC defeat assuring reception of even the weakest signals. FM noise and filter slide switch cuts out unwanted station noise. The AM section features a superheterodyne circuit with AVC, and built-in ferrite loop antenna. The 40 watt amplifier section features large power fransformers and a frequency response of 20 - 20,000 cps ±2 dB. Less than 1,5% harmonic distortion on all modes.complete stereo preamp facilities provide dual concentric front panel controls for bass and treble, volume control balance, blend for variable channel separation from 5-position selection switch stereo to mono, (AM, FM, Stereo, Phono, Aux), 4-position amplifier mode switch (A, B, AB, REV), rumble filter slide switch, loudness slide switch, jack for stereo headphones, and On-Off power switch. Read controls include: Speaker phase switch, 8-16 Ω impedance selector switch , dimension control adjustment, speaker on/off switch, AC outlet, fuse and stereo tape outputs

" for the finest in electronic equipment  . . .  choose Lafayette"

Conceived and developed by Lafayette Radio, these products offer every desirable feature that 43 years of experience can provide. Precise engineering and the use of quality components assure you of the best  possible performance and the utmost reliability from the finished product. Whatever your need and budgetary level, there is a wide range of fine quality electronic equipment from which to choose. Each embodies the same fine engineering and handsome styling

Specifications

Frequency Response: 

FM :  20 - 20,000 cps ±0,5 dB

AM :  20 - 5,000  cps ±3 dB

FM Sensitivity:  2 µV for 20 dB of quieting

Harmonic Distortion:  0,7% on FM for 100% modulation

Hum level:  60 dB below 100% modulation

MPX Separation:  30 dB at 400 cps

Image Rejection FM :  -50 dB

Amplifer Section

Power Output: 20 watts per channel

Sensitivity:

2 mV at full output (mag. Phono)

30 mV at full output (crystal input)

Hum And Noisse:

65 dB below full outputfor low level

75 dB for high level

Tone Control Range:

Bass Control :  ±12 dB at 50 cps

Treble Control :  ±9 dB at 10 kc

Output Impedance:  8 and 16 Ω, switch selected

Input impedance: 

Phono :  47 k

High level :  22meg

Rumble Filter:  -8 dB  at 50 cps

Phono Equalization:  Riaa Standard

Finish:  handsome enclosure in contrasting brown and brass

Dimensions (W x H x D):  17-1/2" x 5-1/4" x 15"

Weight:  45 lbs (shipping)

Lafayette LR-3500

You won't and you can't

Because the LR-3500 is as good or better than any receiver around - including some that cost as much as half thousand dollars.

The top of the Lafayette line, the LR-3500 AM,FM and FM stereo receiver has all the features you've come to expect as the trappings of power. It'has state-of-the-art. Electronics, complete power controls to personalize the sound. 

The LR-3500 has more Continuous Power (RMS) than the Pioneer SX-737, Sony STR-7055, Sansui 771 and Kenwood KR-6400. Total Harmonic Distortion as low as the Pioneer and the Sansui. Better IHF FM Sensitivity than the Marantz 2250, the Sony, Sansui, Kenwood and Pioneer. And Capture Ratio that's better than the Sansui and equal to the Marantz and Kenwood.

Getting down to specifics, the LR-3500 puts out 47 Watts  per channel into 8 ohms from 20 - 20,000 Hz at no more  than 0,5% Total Harmonic Distortion. It has two tuning meters, two tape monitors, two stereo headphone output jacks, front panel tape output and mike inputs, FM MPX Phase Lock Loop Circuitry and loads of other features all packaged in a handsome walnut finish wood cabinet. And topped off with our 2 year free repair or replacement limited warranty on material and workmanship.

We know the Lafayette LR-3500 is a great $400 receiver because we've sold thousands of them at that price for years. But right now, it's an incredible $298 at your Lafaayette store.

It sounds too good to be true. But then, so does the LR-3500

UREI 813

Time Aligned™ Studio Monitor System

Features:

First Time Aligned™ monitor system designed for the professional studio

Features UREI 800 series TA™ network (patentpending)

6048G duplex with UREI custom H.F. horn for extended and more uniform H.F. response

Second L.F. 15" direct radiating driver fed from 3-way TA network for extended L.F. response and higher power handling capability at low frequencies

Graeter than 11,5 cu ft. Enclosure with pressure cotrol aperture for excellent L.F. damping, good efficiency and low distortion.

Unique enclosure damping method provides high efficiency conversion of low frequency aound pressure to adiabatic enrgy.

The 813 Studio Monitor System is the first generation product of a joint R & D effort of UREI and E. M. Long Associates. The Time Align™ Technique is a realtime design method, utilizing proprietary instrumentation developed by Long which allows the driver placements and network parameters to be adjusted simultaneously, achieving near perfect alignment of the frequency components of a complex transient waveform as heard by a listener.

The importance of time (phase) parameters of loudspeaker systems, in addition to smooth frequency response, has been postulated for many years. These group time delay anomalies may be severe in some multi transducer systems, although they may exhibit satisfactory or even excellent frequency response.

For stereo applications the model 813 Studio Monitor System is built in "mirror-image" (813 L, 813 R) to produce identical dispersion towards the listening position between two systems. The series 800 TA networks with the 800H custom H.F. horn, are also available separately in two way and three way configuration for both the 6048G and the 604E.

Specifications

Type:  Dual woofer coaxial with Model *#* three way TA network

Power Rating:  75 watts; 40 Hz to 20 kHz, with pink noise

Frequency Response:  ±3 dB, 40 Hz to 15 kHz measured "freespace" 4 πsteradians (H=5m, D=1m)

Sensitivity:  89 dB SPL/1V/1m

Impedance:  8 Ω, nominal (minimum impedance greater than 4 Ω)

Network:  UREI *#*, 3 way

Cabinet:  Utility flat black painted

Dimensions  with Grille (W x H x D):  914 x 787 x 622 mm (36" x 31" x 24,5")

Weight: 79,2 kg (176 pounds)

Kyocera R-861

If receivers have something of a bad reputation among serious audiophiles, there's a good reason, in Japan, where everybody owns compnent high fidelity, nobody owns one-piece receivers. In fact, North America may be the only place where receivers represent a majority of the market.

For most Japanese audio engineers, receivers are strictly for export. They're not serious components at all. So receivers are designed by the second-string engineers. This explains why even companies with decent separates tend to load their receivers up with meaningless knobs, buttons, and displays.

The irony here is that  there's no reason why receivers must be second-class components. There's nothing to prevent a company from using the same common sense and judgement in receiver design as they exercise with separates. This is the guiding philosophy behind Kyocera receivers.

 MOS FETS in the Driver Stage

A rarity in receivers, Metal-Oxide-Semiconductor Field Effect Transistors (MOS FETs) are used in the driver stages of all Kyocera receivers for their superior transient response and isolation characteristics.

Pre-Out/Main-In jacks

While it is hard to find a receiver with pre-amp output/ main-amp input jacks nowadays,, all Kyocera receivers have them. So you can connect outboard signal receiver as part of an elaborate multi-amp system. That's particularly important considering the multi-room capability of the Kyocera Full-System Remote Control network.

 The Kyocera R-861

Features

100 watts per channel (continous RMS both channels driven into 8 ohms from 20 Hz to 20 kHz with no more than 0,02% Total Harmonic Distortion

Compatible with Kyocera Full System Remote Control network

Manual/electronic volume control

Parametric bass, midrange and treble controls

Subsonic filter at 20 Hz with 12 dB/octave slope

High filter

Two tapemonitors with dubbing

Pre-amp Output/Main-amp Input jacks

MOS FETs in the amplifier driver stage for better dynamic performance

Toroidal transformer

Low-feedback design for reduced transient intermodulation distortion

Oxygen-Free Copper (OFC) wiring fo reduced noise

Moving Magnet/Moving Coil phono input stage

Female banana jacks bypass speaker switching for straight-wire-with-gain circuit

Quartz frequency synthesis tuning

FM front end with MOS FETs and High-Q varicaps for minimum interference

Ceramic IF filters for high selectivity, low distortion

Automated  IF bandwidth switching (Wide/Narrow) adapts to your reception conditions

High-frequency FM comparator for reduced noise

FM quadrature detector for low distortion

Switchable de-emphasis for Dolby FM broadcasts

Chopper type FM stereo demodulator for improved stereo separation

High blend switch for better sound on weck FM stations

7AM + 7 FM station presets

Specifications

Power Output RMS (both ch. Driven into 8 Ω with no more than 0,02% T.H.D., 20 Hz - 20 kHz):  100 W/ch

Dynamic Short-Term Power (at 1 kHz):

120 W/ channel at 8 Ω

180 W / channel at 4 Ω

230 W/ channel at 2 Ω

Total Harmonic Distortion (at rated power):  0,02%

Power Bandwidth (-3 dB re rated power):  10 Hz - 60 kHz

Intermodulation Distortion (at rated output,SMPTE):  0,02%

Slew Rate:  50 V/usec

Rise Time:  1,0 usec

Dynamic Headroom , 8 Ω :  1,0 dB

Input Sensitivity/Impedance:

Phono MC  :  125 µV/100 Ω

Phono MM  :  2,5 mV/47 k Ω/100 pF

Others :  150 mV/30 k Ω

Phono Input Overload  1 kHz, 0,5% T.H.D.:

phonoMC :  8 mV

PhonoMM :  150 mV

Signal-to-Noise Ratio (IHF short circuited, A-weighted, rated output):

Phono MC :  68 dB

Phono MM :  88 dB

Others :  100 dB

Turnover Frequencies:

Bass Control :  100 - 500 Hz

Midrange Control :  0,5 - 2,0 kHz

Trable Control :  2 - 10 kHz

High Filter (6 dB/oct) at 10 kHz :  -6 dB

Subsonic Filter (12 dB/oct) aat 188 Hz :  -3 dB

FM Usable Sensitivity (mono):  9,8 dBf

FM 50 dB Quieting Sensitivity

Mono :  14,8 dBf

Stereo :  35,8 dBf

FM Capture Ratio (Normal IF):  1,0 dB

FM Distortion, 1 kHz, Normaal IF

Mono :  0,06%

Stereo :  0,07%

FM Stereo Separation, Normal IF, 1 kHz:  58 dB

FM Frequency Response (30 Hz - 15 kHz):  +0 dB/-0,5 dB

FM Signal-to-Noise  Ratio, A -weighted

Mono :  82 dB

Stereo :  76 dB

FM Alternate Channel Selectivity:

Normal IF :  40 dB

Narrow IF :  81 dB

FM Spurious Rejction:  95 dB

FM IF Rejection:  120 dB

FM Image Rejection:  85 dB

FM Subcarrier product Ratio:  65 dB

Power Consumption:  320 W

Dimensions (W x H x D):  460 x 132 x 360 mm (18-1/8" x 5-3/16" x 14-3/16")

Weight:  12,3 kg (27 lbs)

Kyocera R-661

The Kyocera R-661

Features

70 watts per channel (continous RMS both channels driven into 8 ohms from 20 Hz to 20 kHz with no more than 0,02% Total Harmonic Distortion

Compatible with Kyocera Full System Remote Control network

Manual/electronic volume control

Parametric bass and treble controls with continuously variable turnover frequency for sensitive and precise tonal adjustment

Subsonic filter at 20 Hz with 12 dB/octave slope

High filter

Two tapemonitors with dubbing

Pre-amp Output/Main-amp Input jacks

MOS FETs in the amplifier driver stage for better dynamic performance

Toroidal transformer

Low-feedback design for reduced transient intermodulation distortion

Oxygen-Free Copper (OFC) wiring fo reduced noise

Moving Magnet/Moving Coil phono input stage

Female banana jacks bypass speaker switching for straight-wire-with-gain circuit

Quartz frequency synthesis tuning

FM front end with MOS FETs and High-Q varicaps for minimum interference

Ceramic IF filters for high selectivity, low distortion

Wide/Narrow IF bandwidth switch adapts to your reception conditions

High-frequency FM comparator for reduced noise

FM quadrature detector for low distortion

Chopper type FM stereo demodulator for improved stereo separation

High blend switch for better sound on weck FM stations

7AM + 7 FM station presets

Specifications

Power Output RMS (both ch. Driven into 8 Ω with no more than 0,02% T.H.D., 20 Hz - 20 kHz):  70 W/ch

Dynamic Short-Term Power (at 1 kHz):

80 W/ channel at 8 Ω

110 W / channel at 4 Ω

140 W/ channel at 2 Ω

Total Harmonic Distortion (at rated power):  0,02%

Power Bandwidth (-3 dB re rated power):  10 Hz - 60 kHz

Intermodulation Distortion (at rated output,SMPTE):  0,02%

Slew Rate:  50 V/usec

Rise Time:  1,0 usec

Dynamic Headroom , 8 Ω :  1,0 dB

Input Sensitivity/Impedance:

Phono MC  :  125 µV/100 Ω

Phono MM  :  2,5 mV/47 k Ω/100 pF

Others :  150 mV/30 k Ω

Phono Input Overload  1 kHz, 0,5% T.H.D.:

Phono MC :  8 mV

Phono MM :  150 mV

Signal-to-Noise Ratio (IHF short circuited, A-weighted, rated output):

Phono MC :  64 dB

Phono MM :  82 dB

Others :  100 dB

Turnover Frequencies:

Bass Control :  100 - 500 Hz

Trable Control :  2 - 10 kHz

High Filter (6 dB/oct) at 10 kHz :  -6 dB

Subsonic Filter (12 dB/oct) aat 188 Hz :  -3 dB

FM Usable Sensitivity (mono):  10,1 dBf

FM 50 dB Quieting Sensitivity

Mono :  15,5 dBf

Stereo :  36,5 dBf

FM Capture Ratio (Normal IF):  1,0 dB

FM Distortion, 1 kHz, Normaal IF

Mono :  0,07%

Stereo :  0,10%

FM Stereo Separation, Normal IF, 1 kHz:  55 dB

FM Frequency Response (30 Hz - 15 kHz):  +0 dB/-0,5 dB

FM Signal-to-Noise  Ratio, A -weighted

Mono :  80 dB

Stereo :  74 dB

FM Alternate Channel Selectivity:

Normal IF :  40 dB

Narrow IF :  75 dB

FM Spurious Rejction:  88 dB

FM IF Rejection:  110 dB

FM Image Rejection:  68 dB

FM Subcarrier product Ratio:  65 dB

Power Consumption:  210 W

Dimensions (W x H x D):  460 x 132 x 360 mm (18-1/8" x 5-3/16" x 14-3/16")

Weight:  11,7 kg (25 lbs)

Kyocera R-461

The  Kyocera R-461

Features

50 watts per channel (continous RMS both channels driven into 8 ohms from 20 Hz to 20 kHz with no more than 0,02% Total Harmonic Distortion

Compatible with Kyocera Full System Remote Control network

Manual/electronic volume control

Subsonic filter at 20 Hz with 12 dB/octave slope

High filter

Two tapemonitors with dubbing

Pre-amp Output/Main-amp Input jacks

MOS FETs in the amplifier driver stage for better dynamic performance

Low-feedback design for reduced transient intermodulation distortion

Female banana jacks bypass speaker switching for straight-wire-with-gain circuit

Quartz frequency synthesis tuning

FM front end with MOS FETs and High-Q varicaps for minimum interference

Ceramic IF filters for high selectivity, low distortion

6 AM + 6 FM station presets

Specifications

Power Output RMS (both ch. Driven into 8 Ω with no more than 0,02% T.H.D., 20 Hz - 20 kHz):  50 W/ch

Dynamic Short-Term Power (at 1 kHz):

80 W/ channel at 8 Ω

110 W / channel at 4 Ω

125 W/ channel at 2 Ω

Total Harmonic Distortion (at rated power):  0,02%

Power Bandwidth (-3 dB re rated power):  10 Hz - 60 kHz

Intermodulation Distortion (at rated output,SMPTE):  0,02%

Slew Rate:  40 V/usec

Rise Time:  1,5 usec

Dynamic Headroom , 8 Ω :  2,1 dB

Input Sensitivity/Impedance:

Phono MM  :  2,5 mV/47 k Ω/100 pF

Others :  150 mV/30 k Ω

Phono Input Overload  1 kHz, 0,5% T.H.D.:

Phono MM :  150 mV

Signal-to-Noise Ratio (IHF short circuited, A-weighted, rated output):

Phono MM :  80 dB

Others :  95 dB

Turnover Frequencies:

Bass Control :  200 Hz

Trable Control :  5 kHz

High Filter (6 dB/oct) at 10 kHz :  -6 dB

Subsonic Filter (12 dB/oct) aat 188 Hz :  -3 dB

FM Usable Sensitivity (mono):  10,3 dBf

FM 50 dB Quieting Sensitivity

Mono :  17,0 dBf

Stereo :  37,2 dBf

FM Capture Ratio (Normal IF):  1,2 dB

FM Distortion, 1 kHz, Normaal IF

Mono :  0,08%

Stereo :  0,12%

FM Stereo Separation, Normal IF, 1 kHz:  48 dB

FM Frequency Response (30 Hz - 15 kHz):  +0 dB/-1,0 dB

FM Signal-to-Noise  Ratio, A -weighted

Mono :  77 dB

Stereo :  72 dB

FM Alternate Channel Selectivity:

Normal IF :  55 dB

FM Spurious Rejction:  86 dB

FM IF Rejection:  100 dB

FM Image Rejection:  68 dB

FM Subcarrier product Ratio:  58 dB

Power Consumption:  175 W

Dimensions (W x H x D):  460 x 110 x 340 mm (18-1/8" x 5-5/16" x 13-3/8")

Weight:  8,2 kg (18 lbs)

Gale Gold Monitor

Gale Gold Monitor

The Gale Gold Monitor offers superior performance by utilising higher quality components throughout. This two-way design, with rear firing reflex port for extended bass performance also features a high power handling 19 mm ferro fluid cooled tweeter providing a more dynamic sound stage. Weight and clarity of reproduction is enhanced by high quality 4 mm 24 gold plated steel binding posts and a superior crossover design tuning the compact cabinet for maximum performance.

Whilst benefiting from significant performance increases the Gale Gold Monitors remain easy to drive, and this amplifier friemdly design is ideally matched with amplifiers ranging in power from 20 watts to 70 watts per channel.

Specifications:

Enclosure Type:  2-way reflex loaded

Drive Units

Low Frequency :  1 x 130 mm doped pulp bass unit

High Frequency :  1 x 19 mm fabric dome, ferro fluid cooled

Crossover:  4 element 1st order Zobel design

Connections:  4 mm, 5 way, 24 k gold plated binding posts

Frequency Response:  60 Hz -15 kHz

Sensitivity:  87 dB (1m/1watt)

Nominal Impedance:  8 Ω

Power Handling:  Amplifier rated from 20 W to 70 W

Construction and Finish:  Luxurious satin silver grey grain.
15 mm high density particle board enclosure and baffle

Enclosure Dimensions (W x H x D) : 267 x 177 x 167 mm

Gale Mini Monitor

 Gale Mini Monitor

The Gale Mini Monitor is a compact two-way loudspeaker with rear firing reflex port for added bass weight, especilly when positioned close to a rear wall. Designed with a moderately high efficiency rating, a nominal impedance of 6 ohm, and flat frequency response, the speakers are very easy to drive and are ideally matched with budget amplifiers ranging in power from 20 watts to 60 watts per channel.

This amplifier friendly compact loudspeaker is designed to be bookshelf, wall or stand mounted. These small babies demonstrate the effectiveness of the Gale 130 mm doped pulp cone bass drive unit, generating sufficiently large sound to fill small rooms without any distress. Treble is informative, the sound stage is deep and wide. High quality 4 mm 24k gold plated binding posts are fitted for maximum performance.

Specifications:

Enclosure Type:  2-way reflex loaded

Drive Units

Low Frequency :  1 x 130 mm doped pulp bass unit

High Frequency :  1 x 10 mm polymer dome, ferro fluid cooled

Crossover:  4 element 1st order Zobel design

Connections:  4 mm, 5 way, 24 k gold plated binding posts

Frequency Response:  60 Hz -15 kHz

Sensitivity:  87 dB (1m/1watt)

Nominal Impedance:  6 ohm

Power Handling:  Amplifier rated from 20 W to 60 W

Construction and Finish:  Luxurious satin silver grey grain. 

15 mm high density particle board enclosure and baffle

Enclosure Dimensions (wxhxd): 267 x 177 x 167 mm

Optonica SM-105H

Optonica SM-105H

Straight DC Stereo Integrated Amplifier with Fully Electronic Control System

This perfectly "straight" amp is a result of Optonica's efforts to provide a fully digital system based on a lead-less and contact-less design. A combination of fully direct-coupled amplifier circuitry and fully electronic controls for tone, volume and balance completely eliminated the use of lead wires to improve frequency response. Conventional mechanical controls were replaced with electronic circuitry to eliminate contacts. Microcomputer-controlled circuitry splits up the signal to ensure more precise tone control and offer a wider dynamic range, better Signal-to-Noise ratio, lower distortion and greater durability.

A full remote control system, unique graphic displays and an innovative sound memory system were added to match the outstanding performance of this amp.

Specifications

Amplifier Section

Music Output Power: 

2 x 77 W at 4 Ω (0,01% Total Harmonic Distortion; -22 dB Att)

2 x 60 W at 8 Ω (0,08% Total Harmonic Distortion; -22 dB Att)

Continuous Output Power (RMS, both channel driven) At 1 kHz :

2 x 50 W (4 Ω, 0,01% T.H.D.; -22 dB Att)

2 x 40 W (8 Ω, 0,08% T.H.D.; -22 dB Att)

Continuous Output Power (RMS, both channel driven) from 20 Hz to 20 kHz:

2 x 45 W (4 Ω, 0,05% T.H.D.; -22 dB Att)

2 x 37 W (8 Ω, 0,02% T.H.D.; -22 dB Att)

Total Harmonic Distortion:

Rated Power :  0,01% (-22 dB att)

Half Power :  0,01% (-22 dB att)

Power Pandwidth (IHF):  10 Hz - 35 kHz (0,1% T.H.D.; -22 dB Att)

Frequency Response

Phono:  40 Hz - 20 kHz (±0,3 dB) RIAA curve Deviation

Tuner, Aux, Tape :  7 Hz - 100 kHz (+0 dB, -3 dB)

Damping Factor (1 kHz, 4 Ω):  20

Signal-to-Noise Ratio (IHF-A): 

Phono:  78 dB

Aux : 95 dB

Phono Overload Level (1 kHz):  130 mV RMS

Tone Control

Bass :  ±8 dB at 100 Hz

Treble :  ±8 dB at 10 kHz

Audio Mutting:  ATT -50 dB (fixed)

Input Sensitivity/Impedance:

Phono :  2,3 mV / 47 k Ω; 120 pF

Aux, Tuner, Tape :  140 mV/10 k Ω

Output Level/Impedance

Speakers :  A, B (4 - 16 Ω)

Headphones :  Low Impedance (4 - 16 Ω)

Tape (Chinch) :  150 mV/220 Ω

Tape (DIN) :  45 mV/ 80 k Ω

General Section

Power Source:  110/220/240 V, 50/60 Hz AC

Power Consumption:  400 W (220V)

Dimensions (W x H x D):  430 x 95 x 320 mm

Weight:  7,8 kg

Optonica ST-105H

Optonica ST-105H

Microcomputer-Controlled Quartz PLL Synthesizer FM/MW/LW Stereo Tuner

Optimum reception with maximum convenience are combined innthis blend of precision electronic systems and state-of-the-art. Component parts. Designed to eliminate error and drift, this advanced electronic tuner employs a quartz PLL synthesizer tuning system to ensure super-precise, super-stable reception under all conditions. This precision is backed by an electronic input attenuator, a dual-gate MOS FET front end, ceraamic IF filters and a quadrature detector. A microcomputer controls both the audio search and station memory tuning systems to provide automatic location of receivable stations and one-touch tuning of favourite stations. A remote control station selection system, digital frequency display and air check calibrator function facilitate optimum use of this advanced tuner.

Specifications

FM Section

Frequency Range:  87,5 - 108 MHz

Antenna Input:  75 Ω unbalanced; 300 Ω balanced

Synthesizer Tuner:  yes

Span Frequency:  0,05 MHz

Automatic Tuning:  yes

Pre-Setting Station;  FM/AM total 10

Sensitivity :

Mono (DIN 40 kHz dev. Signal-to-Noise 26 dB):  1,3 µV (75 Ω); 1,6 µV (300 Ω)

Stereo (DIN 40 kHz dev. Signal-to-Noise 46 dB):  39 µV (75 Ω); 45 µV (300 Ω)

Total Harmonic Distortion (1 kHz, 40 kHz dev.):

Mono :  0,2%

Stereo :  0,3%

Signal-to-Noise Ratio (1mV, 40 kHz dev. 1 kHz):

Mono :  66 dB

Stereo : 61 dB

Frequency Response:  30 Hz - 15 kHz (±3 dB)

Image Rejection (at 98 MHz):  75 dB

IF Rejection(at 98 MHz):  75 dB

AM Suppression (modulated 30%, AM by 1 kHz and 100% FM by 400 Hz):  50 dB

Selectivity (±300 kHz, 40 kHz dev.):  45 dB (normal)

Capture Ratio:  2,5 dB (normal)

Subcarrier Suppression:  45 dB

Stereo Separation:

At 1 kHz :  40 dB

At 10 kHz :  30 dB

AM Section

Frequency Range: 

MW :  522 - 1610 kHz

LW :  150 - 372 kHz

Antenna:  Built-in ferrite bar antenna; External Antenna terminal

Synthesizer Tuner:  yes

Span Frequency:  auto 9 kHz, manual 1 kHz

Automatic Tuning:  yes

Pre-Setting Station:  FM/AM total 10

Sensitivity

MW :  350 µV/m (Signal-to-Noise 20 dB, 999 kHz)

LW :  350 µV/m (Signal-to-Noise 10 dB, 218 kHz)

Audio Section

FM Output (40 kHz dev.):  350 mV (fixed)

AM Output (30% mod.):  200 mV (fixed)

General

Power Sourece:  110/220/240 V 50/60 Hz AC

Power Consumption:  15 W (220 V)

Dimensions (W x H x D):  430 x 71 x 298 mm

Weight:  3,4 kg

KEF Model 103 Reference Series

With exceptional power handling for a compact loudspeaker Model 103 offers unique flexibility of installation and precise stereo image formation.

The drive units are centre-line mounted on a rotable, steel, speaker panel which can be turned (by successive right angles) through 360°. No matter how the system is positioned in the room the speaker panel may be placed to give the broadest, uniform, sound dispersion in the horizontal plane, ensuring accurate stereo imaging and the minimum of tonal variation.

Colouration

The greatest enemy of natural sound reproduction is colouration. It alters the tonal character of instrumental sounds, upsets balance and distorts acoustic perspective.

Colouration is mainly caused by uncontrolled vibrations in the drive units and the cabinet enclosure. The radiating diaphragms in KEF loudspeakers are made from highly damped plastic materials pioneered by KEF in conjunction with renowned organisations such as the BBC, the diaphragm of the low frequency unit in Model 103 is made of a specially formulated rubber-modified polystyrene laminated to a visco-elastic damping layer with a high internal loss factor. This construction effectively dissipates unwanted stored energy in the diaphragm thus preventing diaphragm colouration.

Coloruation due to cabinet wall vibration is reduced by internal bracing partitions and the use of laminated materials. Layered bituminous, anti-resonant linings effecticely cancel any remaining resonances.

Power Handling Capability

Wide range loudspeakers of compact size are necessarily inefficient and high power amplifiers make great demands on power handling capabilities if realistic sound pressure levels are to be achieved. The special motor construction of the Model 103 low frequency unit is designed fro low distortion and high heat dissipation. The anodised aluminium voice coil former and special heat resistant epoxy resin allow the coil to operate safely at temperatures up to 350°C whilst the advanced design of the magnet assembly ensures perfect magnetic linearity. Model 103 will handle the output from 100 watt amplifiers on musical programme.

Drive Units and Dividing Network

High Frequency Radiator T52 Type SP1049.

A new high frequency unit providing high power handling capabilities with exceptional transient response, wide dispersion and smooth frequency response.

Low Frequency Radiator B200 Type Sp1039.

This very special low/mid frequency unit is fitted with a coated Bextrene diaphragm and plasticised PVC cone suspension. The voice coil assembly will safely with stand short term overload to at least 350°C and continuous operation at 250°C

Dividing Network DN16 Type SP1050.

Capacitors selected to a 5% tolerance range and low hystersis ferrite cored inductors ensure close adherence to design crossover frequencies and slopes. Total harmonic distortion due to filter network is less than 0-1% at 50 watts (20V RMS)

 Environmental Adaptability

Model 103 provides broad, uniform sound dispersion for accurate stereo image formation. This is accomplished by centre-line mounting the low and high frequency unit very close together on a rigid steel panel with accurate matching of phase and amplitude between systems.

Accurate stereo image formation over the widest possible listening area also demands precise location of the loudspeaker systems. Multi-unit bookshelf systems can only provide maximum horizontal dispersion when used vertically or horizontally - but not both. When, for practical or visual considerations the systems cannot be used in the intended manner the acoustic performance will be degraded or compromises must be made.

Model 103 frees the user from these restrictions and anables positive stereo image formation whatever cabinet attitude is adopted. This is simply achieved by rotation of the steel speaker panel.

KEF engineers developed the rotatable speaker panel which permits Model 103 to be used on any of its four sides even in elevated locations

Specification:  Model 103

System Type:  Two-way, bookshelf/stand-mount

Enclosure Type:  Closed box

Input Impedance:  8 Ω

Rated Maximum Power:  100W programme

Amplifier Requirements:  25-100 watts per channel into 8 Ω

System Resonance:  58 Hz, Q=0.9

Nominal Frequency Range:  30 - 20,000 Hz 

Specific  Frequency Response:  50 - 20,000 Hz  ±2dB

Sensitivity:  25 watts into nominal 8 Ω produces 96 dB at 1 m and 400 Hz in anechoic conditions

Harmonic Distortion:  1% T.H.D. 100 - 20,000 Hz ralative to 96 dB SPL at 400 Hz, 3% T.H.D. at 50 Hz

Crossover Frequency:  3,000 Hz (electrical cut-off slope 18 dB/8ve)

Finishes:   Walnut, Teak

Grille:  black microcellularfoam

System:  SP1048

Drive units: 

B200 bass unit (SP1039),

T52 tweeter (SP1049)

Crossover:  SP1050

Internal Volume:  25,4 litres

Dimensions (W x H x D):  500 x 303 x 225 mm (19.7" x 13" x 8.9")

Weight:  19.5 kg (41,88 lb)