Specifications - Eico HF-81 User Manual

SPECIFICATIONS *
Output Power:
28 watts continuous; 56 watts peak.
1M Distortion
(60c &7kc at 4: : 2% at 28 watts; 0.
at 10 watts.
Frequency Response:
(2w):I:O. 5db 10c to
1O0kc.
HarmonicDistortion: 16 watts at less than 1% 30c to lOkc;
20 watts at I ess than 1
% 40 c to 10 kc; 28 watts at
less than
1% 50c to
5kc; 8.
4 watts at
less than
2% at 20c.
Transient Response : excellent square
wave reproduction
(4usec rise time) negligible ringing,
rapid settl ing
on 10kc square wave.
Transient Distortion (60cps tone burst) less than 1% at
fu II power.
Inverse Feedback: 20db
Stability Margin: 12db
Damping Factor: above 8,
20 cps - 15 kc.
Sensitivity (input for rated output):
mag. phono 4mv;
tape head 7. 5 ips
- 2 mv; tape head 3.
75 ips
5mv; mic
- 6mv;
tuners, auxiliaries
- 0.
5V.
** Hum & Noise Level (below
rated output): mag. phono
60db; tape head
- 51
db; mic
- 57
db; tuners, aux-
iI iaries
- 75
db.
Tone Control Range:
::I:15db at
50c and 10kc.
Speaker Connections: 4 8, and 16 ohms.
Tubes: 4 - ECC83/12AX7, 2 - ECC82/12AU7
, 4- EL84,
2 - EZ81.
Size:
15" wide, 4 3/4" high, 10 1/2" deep.
Weight:
241bs.
* Where power output is involved, figures are given for
two channels combined; divide power output figures by
two for specifications of each
channel alone. Design
property specifications refer, of course, to either or both
channels.
** Measured with tone controls set " flat"
, LEVEL control
maximum, and
FOCUS control set for maximum gain in
channe I checked.