KEF Model105/2(SP1118)

Commentary

A reference series of floor-type speaker systems developed by computer analysis.

The Model 105/2 is designed not only using computer analysis, but also by introducing computer management to the production line, the quality of each part is stabilized and homogenized.
In addition, all of the prototype and produced 105.2 were compared and tested by actual measurement. Only products within ± 1 dB of the frequency characteristics, output level, input sensitivity, etc. of the data of the prototype and the product passed the inspection and were shipped after pair matching.

In use, the Model 105/2 has an optimal listening range called the listening window.
The listening window range is 40 ° left / right and 10 ° up / down. The middle / high range unit is designed to be able to freely change the angle within ± 30 ° left / right and ± 7 ° up / down so that the listening position is within the area.

The low range is equipped with a cone-type woofer B300 with a diaphragm, and the middle range is equipped with a cone-type mid-range B110 with a diaphragm.
A dome-shaped tweeter T52 is installed in the high range.
The basic model name of the unit used is the same, but the type seems to differ depending on the time of manufacture.
The crossover was also different.

Equipped with an electronic protection circuit that automatically protects the speakers in the event of accidental over-input.
This circuit is an electronic automatic protection circuit called S-Stop. It protects the system from damage by automatically controlling the input for a certain period of time in case of excessive input or abnormal temperature rise of the voice coil.
It also has a peak level indicator that shows the over-output of the amplifier.

The enclosure is divided into two parts : the low-frequency unit is mounted in a closed enclosure, and the mid-range unit is mounted in a small enclosure called a fine-tuneable head assembly.
The overall configuration is a linear phase configuration and is designed to provide optimum stereo presence at the listener position by fine-tuning the mid - and high-range head assembly.
There is a wide range of cosmetic finishes, with four choices for bottom enclosure finish : walnut, cheek, rosewood, and black ash.

Equipped with casters.

There was a full grill which can cover up to the head assembly as an option sold separately.

Model Rating

Method		3-Way, 3-Speaker, Airtight System, Floor Type
Serial Number		Up to 2965	2966 to 4490	4491 or later
Units Used	Low band :	B300(SP1071)
	For mid-range :	B110(SP1057)
	For high frequency :	T52(SP1049)	T52(SP1072)
Crossover frequency		400 Hz, 2.5 kHz
Crossover		SP1119, SP1131, SP1134, SP1135		SP1119, SP2012
Frequency characteristic		38 Hz to 22 kHz ± 2 dB (2m on axis) -10dB(28Hz&27kHz)
Directional property		Horizontal : 10 kHz ± 20 ° Vertical : 20 kHz ± 5 ° Deviation within 1 dB
Output sound pressure level		85dB/W/m (listed in catalog) 86dB/W/m (listed on KEF website)
Maximum sound pressure level		107dB
Distortion factor		Second harmonic distortion (1m on axis, sound pressure 90 dB) : 1% or less (50 Hz to 20 kHz) Third harmonic distortion (1m on axis, sound pressure 90 dB) : 1% or less (20 Hz to 20 kHz)
Impedance		8 Ω
Max Input		200W (program)
Allowable input		Continuous sine wave 20 Vrms : 20 Hz to 50 Hz 28 Vrms or More : 100 to 500 Hz 20 Vrms or less : 1 kHz to 2.5 kHz 7 Vrms or less : 4 kHz to 20 kHz
Recommended amplifier output		40W ~ 200W/ch (8 Ω)
Protection circuit		S-Stop Equipped / 70 V, DC ~ 50 kHz
Peak indicator		LED (40, 50, 60, 80, 100, 125, 200W) LED (50, 60, 80, 100, 125, 160, 200W) input level switching (described in separate catalog)
Internal volume		70 liters + 8.5 liters
External dimensions		Width 415x Height 985x Depth 430 mm (listed in catalog) Width 415x Height 965x Depth 455 mm (listed in separate catalog) Depth 455 mm (listed on KEF website)
Weight		28 kg (listed in catalog) 36 kg (separate catalog, KEF website)