Rotel RA-1570: PC‑USB Input q

10

11

RA‑1570 Stereo Integrated Amplifier

to R15. From the remote, press the BAL 

C

 key to access the BALANCE 

SETTING menu, then press the LEFT or RIGHT 

E

 key to adjust. When 

finished, press the EXIT 

F

 key to exit the menu.

Tone Control Bypass 

K

Bass and Treble Control (Tone Control) circuits are bypassed at factory 

default to ensure the purest possible sound. The front display will show 

TONE BYPASS. To turn on the tone control, press the BYPASS 

K

 key on 

the remote control. From the front panel press the MENU 

9

 key to toggle 

to the Bypass control then press the + or – keys to turn bypass on or off. 

Bass and Treble Controls 

9

C

Set the Bass or Treble controls from the front panel by pressing the 

MENU

9

 key to toggle to either the Bass or Treble Setting menu. Then 

press the - or + key to adjust the value. The Bass and Treble values range 

from -10 to +10. From the remote control, press the Bass or Treble key 

C

, 

then press the LEFT or RIGHT 

E

 keys on the remote to adjust the value.

A properly setup high-performance audio system produces the most 

natural sound with little or no adjustment of the tone controls. Use these 

controls sparingly. Be particularly careful when turning the controls up 

as this increases the power output in the bass or treble range, increasing 

the load on the amplifier and speakers.

NOTE:

 Setting the Bass and Treble controls do not automatically turn 

on the tone control. To turn on tone control, refer to previous section 

Tone Control Bypass.

NOTE: 

Tone Bypass, Bass, Treble and Balance settings are temporary 

and not saved after power off. To make permeant changes please 

see Settings Menu.

Function Control 

8

J

The Function control selects the input signal source. From the front panel or 

remote press the corresponding input key to select the source to listen to.

PC‑USB Input  q

Connect this input using the supplied USB cable to the USB socket of 

your computer.

NOTE:

You will need to install the USB driver located on the CD supplied 

with the RA-1570 onto your computer to allow it to send audio to the 

RA-1570 via USB.

NOTE: 

Upon successful installation of the driver, you may need to 

select the ROTEL audio driver from the audio/speaker setup of your 

computer.

Computer I/O Connector  w

The RA-1570 can be controlled via RS232 for integration with automation 

systems. The COMPUTER I/O input accepts a standard straight DB-9 

Male-to-Female cable.

For additional information on the connections, software, and operating 

codes for computer control of the RA-1570, contact your authorized 

Rotel dealer.

ROTEL LINK  t

This 3.5 mm stereo mini-jack (labeled ROTEL LINK IN) can optionally attach 

to Rotel network enabled products with ROTEL LINK OUT connections.  

This allows the attached Rotel products to communicate with each other 

and be controlled via the Rotel Remote App (available for download on 

the iTunes

®

 store).

EXT REM IN Jack  u

This 3.5mm mini-jack receives command codes from industry-standard 

infrared receivers via hard-wired connections. This feature could prove 

useful when the unit is installed in a cabinet and the front-panel sensor is 

blocked. Consult your authorized Rotel dealer for information on these 

external repeaters and the proper wiring of a jack to fit the mini-jack 

receptacle.

Protection Circuit

The amplifier has both thermal and over-current protection circuitry that 

protects the amplifier against damage in the event of extreme or faulty 

operating conditions. The protection circuits are independent of the audio 

signal and have no impact on sonic performance. Instead, the protection 

circuits monitor the temperature of the output devices and shut down the 

amplifier if temperatures exceed safe limits.

Most likely, you will never see this protection circuitry in action. However, 

should a faulty condition arise, the amplifier will stop playing and will 

display “AMP PROTECTION“ on the front panel 

If this happens, turn the amplifier off. Let it cool down for several minutes, 

and attempt to identify and correct the problem that caused the protection 

circuitry to engage. When you turn the amplifier back on, the protection 

circuit will automatically reset.

In most cases, the protection circuitry activates because of a fault condition 

such as shorted speaker wires, or inadequate ventilation leading to an 

overheating condition. In very rare cases, highly reactive or extremely low 

impedance speaker loads could cause the protection circuit to engage.

If the protection circuitry triggers repeatedly and you are unable to isolate 

and correct the faulty condition, contact your authorized Rotel dealer for 

assistance in troubleshooting.

Settings Menu

You can access the settings menu from the front panel by pressing the 

MENU 

9

 button or the MENU 

D

 button on the remote. You can change 

the value of the selected option by pressing the +/- key on the front 

panel or LEFT/RIGHT 

E

 key on the remote. Step through the sub-menus 

by pressing the MENU 

9

 key on the front panel or MENU 

D

 button 

on the remote.

• Tone Control: TONE BYPASS ON/OFF, BASS level and TREBLE levels 

can be changed to desired settings. Press the ENTER key on the front 

panel or ENT on the remote to toggle between the tone setup options.