McIntosh is one of the most dependable brand names when it comes to high-end audio systems. For years the brand has been recognized by audiophiles throughout the world as equipment that delivers clear and consistent quality in music. McIntosh is probably best known for its amplifiers and preamps, but the company produces many other components and parts for stereo and home theatre.

What are the specs for the McIntosh MA 6900?

Rated Output:
200W + 200W (2 ω, 4 ω, 8 ω, sine wave continuous output)
Load Impedance:
2 Ω, 4 Ω, 8 Ω (Independent Terminal)
Output Frequency Bandwidth:
20 Hz to 20 kHz
0.005% or Less (20 Hz to 20 kHz, 250 mW to 150W, Both Channel Operation)
IHD (Intermodulation Distortion Factor):
Up to 0.005% (250 mW to 200W at any combination of 20 Hz to 20 kHz) * When the instantaneous peak output does not exceed the rated output of 400W
Frequency Characteristic:
20 Hz ~ 20 kHz + 0 -0.5 dB
Maxiumum Output Voltage (of Preamplifier Section):
8 v (20 Hz ~ 20 kHz)
Input Sensitivity:
Phono : 2.5 mv (2.5 v rated output, 0.5 mv IHF) High Level : 250 mv (2.5 v rated output, 50 mv IHF) Power amp in : 2.5 V (rated output)
Signal to Noise Ratio:
Phono : 90 dB (84 dB IHF at input of 10 mV or less) High Level : 100 dB (90 dB IHF below rated output) Power amp : 110 dB (below rated output)
IHF Dynamic Headroom:
2.4 dB (2 Ω, 4 Ω, 8 Ω)
Damping Factor:
100 or More (8 Ω)
Maximum Input Signal:
Phono: 90mV, Line Level: 8V
Voltage Gain:
Line Level → tape : 0 dB Line Level → main : 20 dB
EQ Control:
50 Hz, 150 Hz, 500 Hz, 1.5 kHz, 10 kHz ± 12 dB
100 VAC, 50Hz/60Hz, 4.0A
Width 444.5x Height 181.0x Depth 419.1 mm, Weight: 33.8kg

What else to know about the McIntosh MA 6900?

Integrated amplifier with 5-band equalizer. The 5-band equalizer circuit can enhance or reduce five frequency bands to 12 dB. When the knob is in the center position, it is completely removed from the signal circuit and the sound of the input source can be confirmed as it is. It is equipped with a phono equalizer amplifier suitable for MM type cartridges. All input, output and data ports are equipped with logic operated electromagnetic magnet switches, and signal switching is realized by digital logic IC. In the relay used in this process, contacts plated with gold, rhodium and ruthenium are enclosed in glass tubes filled with inert and oxygen-free gas to increase reliability. Equipped with a motor drive volume control compatible with a remote control, the resistor is laser trimmed to achieve highly accurate tracking. Equipped with an output auto-former, the amplifier and speaker are always in an ideal matching state, and a long life is realized without losing sound quality. It is equipped with various protection circuits as a risk management measures to protect the amplifier itself and to prevent damage to the speakers in the event of an abnormal situation. Power Guard consists of a waveform comparator that monitors the waveform of the amplifier input and output signal. Normally, it does not output anything. However, when the amplifier is driven to output beyond its maximum power capability and a difference occurs between the input and output waveforms, the comparator controls the amplifier gain to suppress distortion of the output. Equipped with a sentry monitor, it senses the dynamic operating time, voltage and current of the output stage and controls the current within non-destructive limits. Other built-in features include a DC hoar to ground the DC, temperature protection that does not degrade SN by natural air cooling, turn-on delay that delays the operation of the amplifier by approximately two seconds when the power is turned on, and in-rush protection that eliminates stress on the power transformer when the power is turned on. It is equipped with a gold plated input / output jack. Stainless steel chassis is used for the chassis. Serial data output port is installed. Equipped with a large blue eyes output display meter with lighting.

Brief History of McIntosh

Long mapped-to Binghamton New York – the current headquarters and manufacturing center for McIntosh Labs – not many people know the brand was originally launched outside of the Nation’s Capital in Silver Spring Maryland, in 1949. In 1956, the brand built their original facility in New York, according to the official brand website.

Other McIntosh Products We Often Buy

Typically, StereoBuyers purchases mostly used amplifiers, especially the vintage amps and high-end McIntosh models such as the MC202 or MC252, and the C220 preamp, for example. We have also purchased many pre-owned tuners from McIntosh over the recent years, including the MR67 and MR78 models, for example.

StereoBuyers has purchased tens of thousands worth McIntosh brand equipment since 2014, with individual buys ranging from $100 to well over $50,000. If you are moving, ready to upgrade, or have McIntosh equipment you do not or will not be using, why not contact us today to find out if it is worth good money?

If you are interested in selling your used McIntosh equipment to us in the greater NYC area or Colorado, please click here to fill out a Free Quote Form and we will get back to you. If we agree on terms, we come to meet you where you want, and pay cash.

The following images show actual McIntosh equipment purchased by StereoBuyers.