MartinLogan user manual Monolith III Specifications, Monolith III Speaker

Monolith III Specifications

The MONOLITH III hybrid speaker system consists of a broad-range single element electrostatic transducer integrated with a quick-response woofer. This approach takes maximum

advantage of the positive aspects that	electrostatic transducer element itself,
both technologies have to offer.	an elegantly simple solution.
Dispersion is a controlled 30 degrees.
This was achieved by curving the

MONOLITH III SPEAKER

System Frequency Response

28-24,000 Hz +/-2dB

Electrostatic Frequency Response

95-24,000 Hz +/- 2dB

Woofer Frequency Response

28-2,000 Hz +/- 2dB

Dispersion

Horizontal: 30 Degrees

Vertical: 4' Line Source

Sensitivity

89dB/2.83 Volts/meter

Impedance	Weight
High-pass:	120 lbs/speaker; 54.4 kg/speaker
Nominal: 4 ohms, below 10kHz	Size (HWD)
Minimum: 1 ohm @ 20kHz
Low-pass:	73.75" x 26.75" x 11.75"
Nominal: 4 ohms	187.3cm x 67.9cm x 29.8cm
Minimum: 4 ohms	Components
Power Handling
	Glass-epoxy boards,
250 watts per channel	custom-wound audio transformers,
Recommended Amplifier Power	30-amp gold plated binding posts,
	regulated HV power supply
80 - 250 watts per channel

IIIp INTERFACE

Crossover Frequency

125 Hz @ 12dB/octave

Impedance

Nominal: 4 ohms, below 10kHz

Minimum: 1 ohms @ 20kHz

Components Glass-epoxy boards, polypropylene capacitors, 100% OFC coils, wirewound resistors,

30-amp gold plated binding posts, non-ferrous enclosure

IIIx CROSSOVER

Crossover	Frequency		Circuit Topology
125 Hz:	@12dB/octave	low-pass	Audio circuits are fully complimen-
	@18dB/octave	high-pass	tary, class-A current-biased J-FET
			buffers that isolate passive filter
Input Impedance			networks.
47,000 ohms			Power supply employs a toroidal
Output Impedance			transformer , discrete voltage and
100 ohms			self-tracking current regulation.
			40-volt peak to peak swing allows
Distortion			for 30dB of dynamic headroom.
0.003% THD @ 1kHz @ 1Vrms			Components
Signal to Noise			Glass-epoxy boards, metal film
Greater than -95dB			resistors, polypropylene capacitors,
			hand picked J-FETs, TIFFANY
			input/output connectors

Monolith III User's Manual Page5