Environmental Equalizer w/ wood case
All pre-owned product is tested in our service department and have been passed for sale... and comes with a 90 day warranty! All of the controls have been cleaned and tested.
In nice condition. There some scratches on top wood case and on the top of chrome bezels at corners.
Original box and packing are not included, but we will pack carefully. Pix of inside is a stock pix.
Specs are last image
From: McIntosh Equalizer History by Roger Russell
The MQ101 Environmental Equalizer has an illuminated glass panel that matches the appearance and width of other McIntosh electronics. It also has Panloc fasteners that allow it to be locked in place in the cabinet or it can be unlocked to slide out. It is shipped complete with a wood cabinet. It can also be custom mounted using the panloc brackets from the cabinet. There is no power switch in the MQ101. It can be plugged to a switched outlet in the preamplifier or receiver.
The MQ101 also has mid and high frequency controls. Some speaker systems have controls for the mid and tweeter that are part of the crossover network. These controls or switches are located at the rear of the cabinet that require reaching behind each speaker to make an adjustment. In addition, the potentiometers or switches that are used often become intermittent. The speaker system impedance also changes with various settings, sometimes going too low. In addition, the frequency range covered by each control is limited by the frequency range and efficiency of the mid or tweeter in the system.
In comparison, the MQ101 mid frequency and high frequency controls can be remotely adjusted, do not affect the impedance, and avoid high currents. The frequency band for the mid and high frequencies is not limited to only the frequency range or efficiency of the mid or tweeter. It covers a range that relates better to music.
The input to the MQ101 normally comes from the preamplifier main output. The output from the MQ101 then goes to the power amplifier input. However, when used with a receiver, access to the preamp output and power amp input is not always available. A way around this is to use the tape monitor section of the receiver. Tape Out from the receiver goes to the MQ101 input and the MQ101 output goes to Tape In on the receiver. The tape monitor switch in the receiver must then be left at the IN position. The Tape monitor function in the receiver is, of course, lost. A tape monitor switch on the front panel of the MQ101 is provided to restore this feature. Input and output jacks are located at the rear of the MQ101.
When The MQ101 is used with the tape monitor circuit, this would be equivalent to driving the MQ101 with the volume of the preamplifier up full. The MQ101 can then be overdriven. A three position input attenuator slide switch is at the left side in the rear. It is normally used in the 0dB position but when the MQ101 is driven by the tape monitor output, the switch must be placed in the –12dB position.
