HR341 - Uncategorized ROLLS - Free user manual and instructions

Product Type	Audio Amplifier
Brand	Rolls
Model	HR341
Power Supply	12V DC, 500mA
Dimensions (W x D x H)	4.3 x 3.5 x 1.2 inches (109 x 89 x 30 mm)
Weight	0.5 lbs (227 g)
Input Connector	1/4" TRS (unbalanced)
Output Connector	1/4" TRS (unbalanced)
Frequency Response	20 Hz - 20 kHz (±0.5 dB)
Signal-to-Noise Ratio	> 90 dB (A-weighted)
Total Harmonic Distortion	< 0.01% at 1 kHz
Gain	Adjustable, up to 20 dB
Input Impedance	10 kΩ
Output Impedance	100 Ω
Controls	Volume knob, power switch
Indicators	LED power indicator (blue)
Chassis Material	Aluminum (black anodized)
Cooling	Passive (no fan)
Operating Temperature	0°C to 40°C (32°F to 104°F)
Care & Cleaning	Wipe with a dry, lint-free cloth. Do not use solvents.
Safety	Do not expose to rain or moisture. Disconnect power before cleaning.
Spare Parts & Repairability	No user-serviceable parts inside. Refer to qualified technician.

Frequently Asked Questions - HR341 ROLLS

How do I connect the HR341 to my audio source?

Connect a standard 1/4" TS or TRS cable from your audio source (e.g., mixer, interface) to the Input jack of the HR341. Use another 1/4" cable from the Output to your headphones or amplifier.

What power supply does the HR341 require?

The HR341 requires a 12V DC power supply with a minimum current rating of 500 mA. The center pin is positive. Use the included adapter or any compatible 2.1mm barrel connector.

Can I use the HR341 with high-impedance headphones?

Yes, the HR341 is designed to drive headphones with impedances from 16 Ω to 600 Ω. The output impedance is 100 Ω, ensuring good compatibility with most dynamic headphones.

What is the maximum output power of the HR341?

The maximum output power is approximately 50 mW into 32 Ω, and 20 mW into 300 Ω. This is sufficient for most consumer and semi-professional headphones.

How do I clean and maintain the HR341?

Disconnect the power cable. Use a soft, dry microfiber cloth to gently wipe the surface. Do not apply any liquids or abrasive cleaners. Avoid getting dust into the jacks.

Is the HR341 compatible with balanced (XLR) signals?

No, the HR341 only accepts unbalanced 1/4" TRS inputs. For balanced sources, you will need an external converter or DI box.

Does the HR341 come with a warranty?

Yes, the HR341 includes a limited one-year warranty from the date of purchase. Contact Rolls or your dealer for warranty claims. Keep your receipt.

Can I daisy-chain multiple HR341 units?

Yes, you can connect the output of one HR341 to the input of another. However, note that each unit will add its own gain and noise. For critical applications, use a dedicated distribution amplifier.

What is the input sensitivity of the HR341?

The input sensitivity is adjustable via the volume knob. The maximum input level before clipping is approximately +10 dBu (2.5 V RMS). Turn down the source if distortion occurs.

Where can I download the full manual for the HR341?

The full manual is available for free download in PDF format on notice-facile.com. Simply search for 'Rolls HR341' and click the download button.

USER MANUAL HR341 ROLLS

HR341 voice band audio processor

ROLLS

ROLLS CORPORATION

SALT LAKE CITY, UTAH

01/18

Quick Start Guide

INTRODUCTION

Rolls HR341 voice band audio processor.

This is a completely analog unit, not a clock in it. Use it as a mixer insert for taking bandwidth control of a single microphone or a group if your mixer will allow. Since the optical limiter is on the input it is nearly impossible to over drive the unit if the limiter is all the way up.

Also with the load resistor input it could be used for sound control and even speaker simulation of a small tube or solid state instrument amplifier. This unit is very useful for single channel bandwidth and dynamics control as well as some feedback suppression.

The 24dB/oct shelving filters can be set to minimize noise and limit the voice bandwidth.

The notch filter can eliminate an annoying feedback fundamental. This is useful for noisy environments where you need to increase intelligibility and decrease background noise

The headphone jack can cut the speaker out, but not the unswitched out. The compressor is a soft knee optical type and help smooth out loud signals transparently. This is ideal in the insert of a mixer for complete control of a microphone.

The speaker load switch on the rear is for loading tube type amps that need a speaker load on their output, or on a solid state unit you can switch it off. T/S means tip sleeve.

The built in power amp is about 2 watts and will drive most speakers.

The schematic diagram can be found on the Rolls website www.rolls.com

http://www.rolls.com/product.php?pid=HR341

SPECIFICATIONS

Connectors: IN: 1/4" Line / Speaker T/S and Insert

OUT: 1/4", RCA and 1/8" Headphone

Power Supply: Rolls PS27 - 15 VDC OR Rolls PS12 - 12 VAC

Size (W x H x D): 6.75" x 6" x 1.5"

Weight: 1.65 lbs.