Fredenstein F603A User manual

F603A
High-Q four Band
EQUALIZER
Operating Manua

Fredenstein F603A Equa izer
The F603A is a high performance High-Q four band equalizer for tracking and mi ing (Q = 2). The
F603A features passive LC (Inductor / Capacitor) filters combined with a very short signal pass.
The low and high frequency filters are shelving types, while the mid frequencies are band pass
filters. Each shelving filter has four different frequencies while the band pass filters offer si . The
active filter range is indicated by LEDs. To facilitate sound comparisons, a true “hard” bypass is
available. The gain range for each filter is +- 16 dB. All filters are switched by relays to guaranty
the highest possible sound quality. The F603A e hibits unrivaled silkiness , but at the same time an
e tremely detailed sound stage. The high power output stage with an impedance of less than 20
Ohms and a driving capability of up to +- 200mA ensures no loss of performance with even the
most demanding comple loads.
As all Fredenstein products, the F603 is designed by a German-American team and manufactured in
Taiwan.
Overview:
C ip Indicator
Threshold + 24 dBu
Rotary Contro s:
HI : High Frequency Gain
HI MID : High Mid Gain
LOW MID : Low Mid Gain
LOW : Low Frequency Gain
Switches:
HI : up/down to select High Frequency
shelving filter band
HI MID : up/down to select Hi Mid band pass
filter frequency
LOW Mid : up/down to select Low Mid band pass
filter frequency
LOW : up/down to select Low Frequency
shelving filter band
BYPASS : Hard Bypass function when lit
Fredenstein F603A Manual V1.3 July 18, 2014 Page 1

Fredenstein F603A Equa izer
Insta ation:
Please power down your rack or bo first, before inserting the F603A. The power requirements are
ma imum +/-16V, +/-200mA. In case you don't use a Fredenstein Bento, please make sure your bo
or rack can support the current. Please consult your third party documentation in case of any doubt.
User Contro s:
High Frequency Contro :
Select the desired corner frequency for the high frequency shelving filter by flipping the switch up
or down:
7000 Hz, 9000 Hz, 10 kHz and 12 kHz
High Frequency Gain:
Apply +/- 16 dB of high frequency gain.
Hi Mid Frequency Contro :
Select the desired frequency for the hi mid frequency band pass filter by flipping the switch up or
down:
1000 Hz, 1500 Hz, 2000 Hz, 3000 Hz, 4000 Hz, Hz and 5000 Hz
Hi Mid Frequency Gain:
Apply +/- 16 dB of hi mid frequency gain.
Low Mid Frequency Contro :
Select the desired frequency for the low mid frequency band pass filter by flipping the switch up or
down:
200 Hz, 250 Hz, 330 Hz, 450 Hz, 600 Hz, and 800 Hz
Low Mid Frequency Gain:
Apply +/- 16 dB of low mid frequency gain.
Low Frequency Contro :
Select the desired corner frequency for the low frequency shelving filter by flipping the switch up or
down:
35 Hz, 60 Hz, 80 Hz, and 120 Hz
Low Frequency Gain:
Apply +/- 16 dB of low frequency gain.
Bypass:
Hard Bypass function if switch is lit. Signal on the output is the input signal, no amplifiers are in the
signal path (Filter Frequency LEDs will turn off).
The F603A automatically stores all parameters when turned off and reloads them on the ne t
power up, no need to fill out recall sheets. If inserted in a Bento D bo , all parameters are displayed
on the LCD display.
Fredenstein F603A Manual V1.3 July 18, 2014 Page 2

Fredenstein F603A Equa izer
Technica Data:
Frequency Response : 20 Hz – 20,000 Hz, +/- 0.2dB
Distortion : < 0.01%
S/N Ratio : > 90 dB at 0dB gain
Input Impedance : > 10KOhm
Ma . Input Level : + 24 dBu balanced
Output Impedance : 20 Ohm
Ma . Output Current : +/- 200 mA
Ma . Output Level : + 26 dBu balanced
High Shelving Filter : 9 KHz – 12 kHz in 4 steps
High Shelving Gain : +/- 16 dB
Hi Mid Band Pass Filter : 1000 Hz – 5000 Hz in 6 steps
Hi Mid Band Pass Gain : +/- 16 dB
Hi Mid Filter Q : 2
Low Mid Band Pass Filter : 200 Hz – 800 Hz in 6 steps
Low Mid Band Pass Gain : +/- 16 dB
Low Mid Filter Q : 2
Low Shelving Filter : 35 Hz – 120 Hz in 4 steps
Low Shelving Gain : +/- 16 dB
Power Consumption : +/- 16 V, +/- 200 mA (600 Ohm load)
Fredenstein F603A Manual V1.3 July 18, 2014 Page 3

Contact Info:
Fredenstein Professiona Audio
by Orion Communication
7F-1, No. 582, Ruei Guang Rd.
Neihu District
Taipei 114
Taiwan
Phone : + 886-2-2657-2618
Email : [email protected]
Web : www.fredenstein.com