Rolls MA258 Connection Manual

WARNING: THE MINIMUM SPEAKER IMPEDANCE IS 4

OHMS.

SPECIFICATIONS:

MA258

Integrated Amplier with

RIAA Phono preamp

and Headphone Amp

Line Input Impedance: 10K Ohms
Power Output: 20 Watts RMS (4 Ohms)
Voltage Gain: 30 dB Line
Maximum Supply Voltage: 24 VDC
THD: .05% typical
EIN: 3 mV
E󰀩ciency: 85%
Input Sensitivity: 28 mV
Bandwidth: 20Hz - 25 kHz +/- 3dB
+Size: 6.75" x 3.5" x 1.5"
Weight: 1.6 lb.

75889 025 80

6 4

PWR

PHONO

MADE IN USA

www.rolls.com

MA258

IN 2

HEADPHONE

0 10

VOLUME

MA258

-

• Integrated Amplier

• Built in Headphone Amplier

• Low noise, e󰀩cient operation

• Small compact size

• Class D high e󰀩ciency amp

TREBLE

+

+

-

BASS

SPEAKER OUTPUTS

-

RIGHT

+

-

INPUT

SELECTOR

PHONO

CH2

+

LEFT

CH1

IN 1

ROLLS

PS24

-

+

Salt Lake City, Utah

3/18

Connection guide

IN 1

VOLUME

BASS

MA258

MADE IN USA

0 10

www.rolls.com

HEADPHONE

PWR

SELECTOR

TREBLE

INPUT

CH2

PHONO

CH1

-

+

-

+

INTRODUCTION

Thank you for your purchase of the MA258.The MA258 is intended for high end
audiophile speakers or headphone listening. It has a FR4(V94-0) rated glass
epoxy circuit board, and a powder coated all steel chassis. It is designed to
last. The MA258 is a Integrated Audio Amplier with a RIAA Phono preamp built
in. It has three selectable stereo inputs a phonograph, RCA and a 3.5mm jack
for phones or tablets. The MA258 also has a very well designed headphone
output so it can be used as a stand alone headphone amplier. The MA258 was
designed to have the highest level of sound quality, whether you are using it as a
headphone amp or with speakers. At every design stage we spent a considerable
amount of time focused on one thing, sound quality.

INSPECTION / WARRANTY

1. Unpack and inspect the MA258 box and package.
If obvious physical damage is noticed, contact the carrier immediately to make a
damage claim. We suggest saving the shipping carton and packing materials for
safely transporting the unit in the future.

2. Please visit our web site at www.rolls.com and click on the Register Your War­ranty Here button.

OPERATION

The MA258 was designed to have the highest level of sound quality, whether
you are using it as a headphone amp or with speakers. At every design stage we
spent a considerable amount of time focused on one thing, sound quality.

The inputs and outputs of the MA258 are self explanatory. Plug a signal in, select
the source, and connect to your desired headphones or speakers.

One thing to note about the MA258 is the speakers are the default output. When
you plug Headphones into the headphone jack on the front of the unit. The power
amp section is then completely disconnected from the circuit. Meaning that when
using the Headphone output of the MA258 the unit is only a headphone amplier.

REAR PANEL

FRONT PANEL

VOLUME: Adjusts the level of signal.

IN 1: 3.5mm jack: For connection to a phone, music player or computer. TRS
Stereo (left, right and ground).

HEADPHONE: Headphone output jack 3.5mm stereo.

INPUT SELECTOR SWITCH: Selects channel used.

PWR

MADE IN USA

www.rolls.com

MA258

HEADPHONE

0 10

VOLUME

-

TREBLE

+

-

SELECTOR

+

BASS

CH2

INPUT

PHONO

CH1

IN 1

SPEAKER OUTPUT: Push terminals for speaker wire.

PHONO: RCA for connection to a record player

IN 2: RCA stereo input

PS24: For connection to the included power supply.

GROUND POST: Standard phono grounding post.

MA258

PHONO

IN 2

+

RIGHT

SPEAKER OUTPUTS

-

-

LEFT

ROLLS

PS24

-

+

+