Fairchild 664B EQ’s racked pair (Vintage)
The MODEL 664 Equalizer is designed around the thin line dimensions of the
FAIRCHILD INTEGRA/series, 1-1/211 wide by 5-1/411 high by 5-1/2″ deep. It has
five high frequency accent positions: 4KC, 6KC, 8KC, 10KC and l5KC. Equalization [J [J
is accomplished in five steps for each of these selected frequencies, culminating
in a total equalization of 10 db. The high frequency response curve takes a haystack shape, which allows maximum effect with minimal equalization. This type of response curve minimizes trouble with excessive equalization of later stages of tape, disk or film transfer. High frequency roll-off is also available on the 664
at the rate of 6 db per octave, and the curves indicate the roll-off possible. The
664 contains a low frequency boost position, five steps, with a maximum of 10 db
– boost, and a complementary roll-off of lows is available as indicated in the curves.
If desired, the high frequency response of the 664 equalizer can be modified by the
·user, and instructions for modification are provided with the unit. The unit can be modified to provide 2, 3, 4, 5 and 7. 5KC equalization points if so desired rather than 4, 6, 8, 10 and 15KG. All or only one of these equalization points can be obtained as desired by the user.
The Model 664 is a passive device with an insertion lass of 17 db. Its size permits mounting in a rack or right on the console. It can be used with conventional low impedance professional equipment and will accommodate input impedances up to 600 Ohms, and has an output impedance of 600 Ohms.
mm mm UI �
– FAIRCHILD SPECIFICATION SHEET
(For specifications on the preamplifier supplied with the Model 665, see Technical Bulletin on the 662 Preamplifier.)
Insertion Loss (Model 664):
Up to 600 ohms 600 ohms
+ 30 db to – 30dbm
Recommended Input L