Audio Database

The

McIntosh MA6800 580,000yen(December, 1994 release)

Description
 
G. Integrated amplifier developed as amplifier which is equipped with three members of T.L (a glass panel, an output transformer, a panel light), and has a quality equivalent to separate amplifier.

The output transformer is carried and eternal high power is realized to the load intensity of 8ohms/4ohm/2ohm, and a stable supply of the peaking capacity electric current more than 53A can be ensured, maintaining a low distortion very much to the frequency far exceeding an audio frequency band.
Furthermore, when this transformer is emergency, it prevents an effluve of DC electric current, and it also has the functionality which protects a speaker.

The signal system from a phone input to a final stage is fundamentally equivalent to the separate amplifier of a mac. Since the merit of an integrated direction no one but is added, after putting a compaction of a signal path into practice, an internal interference and distortion are eliminated carefully.
The severe electromagnetic shielding of the power transformer is examined to all the corners, such as a printing board and a placement of a cable, from the first. Moreover, all the signal switchpoints of a logic control have adopted the reed relay of a glass encapsulated.

A tone control circuit is completely bypassed by a flat position.

By an infrared remote controller, main operations are put in block by a hand, and can be performed.
Digital display of the location of a master volume is carried out to the LED indicator of the center of a panel. Moreover, they are able for a LISTEN system and a RECORD system to be also able to perform freely a selection of the signal which became independent completely, respectively, and to control the video-system selector and speaker selector of an option.

The protection circuitry original with a mac which amounts to six lines, such as a power guarding and the Centrino monitor, is carried.

The power meter which displays the output power of a voltage x electric current in meter about 10 times the speed of response of business-use VU is carried.

The cable of 6mm of core thickness of a lines is direct connectable with a speaker output-terminal.

A preamplifier part output-terminal and a power amplifier part input terminal are carried, and a separation using is possible respectively.

The continuous loudness control original with a mac is carried, and a loudness correction is possible irrespective of a volume location.

Rear
Internal Attached

Rating of a mode
Form Stereo integrated amplifier
Output power (at the time of both channel operation) 150W+150W (2ohm, 4ohm, 8ohm, sinusoidal consecutive output)
Load impedance 2ohm, 4ohm, 8ohm (independent termination)
Output frequency bandwidth 20Hz - 20kHz
THD 0.005% or less (at the time of 20Hz - 20kHz, 250mW-150W, and both channel operation)
Cross modulation distortion (both channel operation) 0.005% or less (at the time of the arbitrary combination of 20Hz - 20kHz 250mW-150W)
Frequency characteristic 20Hz-20kHz+0 -0.5 dB
SN ratio (IHF-A network) Power amplifier: 110dB (Output power)
Preamplifier: 90dB (a 10mV input, 84dB IHF)
High-level: 100dB (an Output power, 90dB IHF)
IHF dynamic head room 1.8dB
Dumping factor 40 or more
Power guarding In 1kHz, it is less than THD 2% to over-drive 14dB.
Input impedance Phono: 47kohm (65pF)
High SFT Level: 22kohm
Power Amplifier in: 20kohm
Input sensitivity Phono: 2.5mV (at the time of an Output power 0.5mV IHF)
High SFT Level: 250mV (at the time of an Output power 40mV IHF)
Power Amplifier in: 1.4V (at the time of an Output power)
Maximum input level Phono:90mV
High Level:10V
Tone control Bass/Treble -- an a maximum of 12dB boost /12dB -- it cuts
Power source AC100V, 50Hz/60 Hz, 6.25A (Underwriters Laboratories/CSA1)
Dimensions Width 445x height 179x depth of 537mm (knob included)
Weight 31.8kg