Rolls RA163 Distribution Amplifier

Rolls RA163 Distribution Amplifier

Rolls RA163 Distribution Amplifier

B&H # RORA163 MFR # RA163
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Rolls RA163 Distribution Amplifier

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Product Highlights

  • Stereo Input x 4 Output
  • Mono Input x 8 Output
  • Balanced XLR Female Inputs
  • Balanced XLR Male Outputs
  • Individual Output Level Control
  • Single-Space 19" Rack Mountable
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Rolls RA163 overview

  • 1Description

The Rolls RA163 Distribution Amplifier features 2 balanced inputs and 8 balanced outputs over XLR connectors. The RA163 will split a stereo input signal into 4 stereo outputs, or a mono input signal into 8 mono outputs. The unit can be used for high-end audio applications such as fixed-installations, sound reinforcement and more. Each output features individual level control dials and the chassis easily occupies a single space of a 19" rack enclosure.

Mono or Stereo Operation - mono input to eight outputs, or stereo inputs to four stereo outputs
+20dB Gain switch
All XLR jack inputs and outputs
UPC: 675889016307
In the Box
Rolls RA163 Distribution Amplifier
  • 1 Year Warranty
  • Table of Contents
    • 1Description

    Rolls RA163 specs

    Connectors Inputs: XLR Female x2
    Outputs: XLR Male x8
    Input Impedance 100k Ohm Balanced
    Output Impedance 50 Ohm Balanced
    Maximum Input Level +24 dBV
    Maximum Output Level +24dB
    Max Input/Output Gain 20dB
    Signal-to-Noise Ratio >90dB
    Frequency Response 10Hz - 40kHz, +/- 1dB
    THD < .008%
    Power 120VAC 50-60Hz, 15VA
    Dimensions 19 x 1.75 x 6.5" (48 x 4.5 x 17cm)
    Weight 7lb (3kg)
    Packaging Info
    Package Weight 5.45 lb
    Box Dimensions (LxWxH) 21.6 x 7.9 x 3.8"

    Rolls RA163 reviews

    RA163 Distribution Amplifier is rated 4.4 out of 5 by 9.
    Rated 4 out of 5 by from Bass rolloff with 600 ohm loads This is a good distribution amplifier and for most users will not cause any problems. One excellent thing is that a manual is provided which includes a schematic diagram! Sadly very few manufacturers provide schematics anymore. Looking at the schematic, I discovered that the output coupling capacitors are only 10 microfarads. If the load you are driving is bridging high impedance (such as 10K ohms) the small capacitors won't be a problem. But if you have a 600 ohm load, then response will be down 3 dB at 45 Hertz. This will produce an audible deep bass rolloff. For a bridging 10k ohm load the -3dB point is 3 Hz. So the first thing I did with mine was to boldly void the warranty, tear into it, and replace all of the 10 microfarad output coupling capacitors with 100 microfarad nonpolarized capacitors. My modified unit will now drive 600 ohm loads without bass rolloff. My advice to users would be to set jumpers to remove any 600 ohm terminations (on devices driven by this DA). Keep your loads high impedance bridging. My advice to Rolls would be to increase the output coupling capacitor size or use DC coupling.
    Date published: 2013-03-13
    Rated 5 out of 5 by from Great features, build and price In our radio station we use this amp to distribute monitor audio to studio monitors, CD recorders, MP3 recorders and phone system. The adjustable levels on each output support broadcast and consumer equipment looking for -10 or +4 levels. This DA is built like a tank. As our first piece of Rolls gear at a very nice cost, we will be considering their other gear in the future.
    Date published: 2015-01-02
    Rated 4 out of 5 by from Good Audio DA Solid Basic Audio DA. I thought it was odd to get what appears to be unity output you have to turn the gain up all the way for the output, normally I'd expect unity to be around 12o'clock or clearly indicated which it was not. It works fine for our needs but this could be better indicated on the product.
    Date published: 2017-02-20
    Rated 5 out of 5 by from This works well I was looking for an audio da with XLR connections. This was exactly what I needed, and it's reasonably priced. One thing--this da has audio pots on the front. I found that in the detent position, the audio was a bit overdriven, so I just backed down all the pots to about 10 o'clock and it's perfect.
    Date published: 2015-06-23
    Rated 5 out of 5 by from Economical alternative. I needed an analog audio DA for a rebuilt radio console. I could have recapped a higher end purpose built DA but the thought of replacing 75 or so capacitors wasn't appealing. For the price the Rolls has excellent specs and I expect it will last in my home studio. Good product at a great price.
    Date published: 2018-07-16
    Rated 5 out of 5 by from Excellent distribution amp for the price Yes you will get some bass roll off in the very very low end, so it will not go down to 5 hz like a set of 800.00 aphex 124a or 750.00 Arx distribution split. The 20 db of gain is a big plus, and of course having level control pots on all outputs, is an excellent feature. IF you are using to drive multiple low end subwoofers, you may wish to change the output capacitors. Existing ones are 10 uf 50 volt polar electrolytic, and you can easily change for 100 uf 50 volt polar electrolytic for a few dollars. Once you open the case these can easily be seen. The capacitors are easily available and are not expensive. If you try this you will need a solder sucker. Do not try soldering without one. Suck up all the old solder and remove the caps and replace all of then in the existing threw holes. They are marked for positive and negative on the pc board. Once you got them all in place just solder them back in. Once you do this for a few more dollars you can rival any expensive distribution amp. Would be nice if it was more than just 3 inch deep on the case. Most components are at least 6 inches.
    Date published: 2014-10-02
    Rated 5 out of 5 by from Very Flexible I used for a first time during E3 2018, the fact that we could use one unit for 2 X 4 Players really help our audio distribution.
    Date published: 2018-08-08
    Rated 4 out of 5 by from works well working as promised..
    Date published: 2014-04-07
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