HA243
Stereo Headphone Amplifi er
Quick Start Guide
ROLLS CORPORATION
SALT LAKE CITY, UTAH
06/11
A
B
MONO-STEREO
MONO-STEREO
75889 02430
6
2
SCHEMATIC
www.rolls.com
OUT
HA243
A-B
OUT
A-B
OUT
A-B
OUT
A-B
MADE IN USA
STUDIOPHILE
HEADPHONE
AMP
SPECIFICATIONS
Input Impedance:
10K Ohms unbalanced
Max Input Level:
+26 dBV
Input Connectors:
RCA, 1/4” and 3.5mm for both A and B inputs
Outputs:
4: 1/4" TRS Stereo jacks
4: 1/8" (3.5 mm) TRS Stereo jacks
Max Gain:
20 dB/Channel
Output Power:
326 mW/side, 652 mW/Channel ( @ 62 Ohms )
Frequency Response:
20 Hz - 20 kHz +/- 3 db
S/N Ratio:
92 dB
THD:
<.008%
IMD:
<.008%
Phase Shift (In to Out):
less than 10 deg.
Slew Rate:
2 V per microsecond
Crosstalk:
- 65 dB
Power
VDC
Weight:
1.6
lbs
Size:
6.75” x 1.75” x 4.75”
Headphone impedance: 8 Ohms to 1000 Ohms
WARNING:
WARNING:
THE MINIMUM HEADPHONE IMPEDANCE FOR THE HA243 IS 8
OHMS. THE MAXIMUM HEADPHONE IMPEDANCE IS 1000 OHMS.
IF YOU CONNECT AND USE THE HA243 WITH A LOWER HEADPHONE IMPED-
ANCE THAN LISTED ABOVE YOU WILL DAMAGE THE UNIT AND POSSIBLY OTHER
EQUIPMENT THAT IS CONNECTED TO THE HA243.
1
Rolls Corporation
5968 S 350 W
M
u
rray
, UT
84107
1
HA243.SCH
A
16 M
a
rch 2011
Title
Size:
D
ocument Number:
Date:
Rev:
Sheet
o
f
Studio Phile HA243 4ch Headphone Amp
Ba
V+
V+
V+
V+
V+
Vb
Vb
Vb
J13
PHO
N
E 1/4
6
5
7
8
U2B
3414
2
3
1
4
U2A
3414
6
5
7
8
U3B
3414
2
3
1
4
U3A
3414
6
5
7
8
U4B
3414
2
3
1
4
U4A
3414
2
3
1
4
U5A
3414
6
5
7
8
U5B
3414
J9
PHO
N
E 1/4
R5
10
1
3
2
P1A
P100K X2
4
6
5
P4B
P100K X2
4
6
5
P3B
P100K X2
4
6
5
P2B
P100K X2
4
6
5
P1B
P100K X2
1
3
2
P2A
P100K X2
1
3
2
P3A
P100K X2
1
3
2
P4A
P100K X2
R9
10K
R8
10K
R13 10K
R12
10K
J12
PHO
N
E 1/4
J10
PHO
N
E 1/4
R17
10K
R4
10K
R2
10K
R18
10
R19
10
R15
10
R14
10
R10
10
R11
10
R6
10
C13
1000 UF
C15
1000UF
C14
47 UF
R22
22K
R23
22K
2
3
1
J1
JAPDC
J11
PHO
N
E 1/4
D2
1N4001
R16
10K
D1
LDRR
R24
4.7K
C3
27PF
C9
27PF
C10
27PF
C11
27PF
C6
27PF
C7
27PF
C8
27PF
C12
27PF
C4
10U
C5
10U
1
3
J3A
RCAX4
2
J3B
RCAX4
4
6
J3C
RCAX4
5
J3D
RCAX4
1
2
3
SW
1A
DPDT
4
5
6
SW
1B
DPDT
1
2
3
SW
2A
DPDT
4
5
6
SW
2B
DPDT
1
2
3
SW
3A
DPDT
4
5
6
SW
3B
DPDT
1
2
3
SW
4A
DPDT
4
5
6
SW
4B
DPDT
J2
JK3.5ST
J8
JK3.5ST
J5
JK3.5ST
J6
JK3.5ST
J7
JK3.5ST
J4
JK3.5ST
C2
10U
C1
10U
J14
PHO
N
E 1/4
R7
470
R1
470
R21
470
R20
470
3
1
2
SW
5
SPDT
3
1
2
SW
6
SPDT
MONO
STEREO
R25
100K
Vb
MONO
STEREO
