Contents and categories

Display all

Contents and categories

Series

Search suggestions

Display all results

RIVER main Passive 2-Channel Line Merger

Item No.: PMAIN
Series: River
Versions:
Merge two stereo signals on one output pair
Allows the combination of two devices, e.g. two mixers to a PA System
Galvanic transformer isolation of outputs
Switchable ground lift to isolate ground loop hum
Neutral sound
High headroom (+20 dBu max. input level)
Passive construction, no power supply required
Extremely fail-safe
Solid casing made of aluminium and steel
Engineered in Germany
 

Contents and categories

Display all

Contents and categories

Series

Search suggestions

Display all results
Merge two stereo signals on one output pair
Allows the combination of two devices, e.g. two mixers to a PA System
Galvanic transformer isolation of outputs
Switchable ground lift to isolate ground loop hum
Neutral sound
High headroom (+20 dBu max. input level)
Passive construction, no power supply required
Extremely fail-safe
Solid casing made of aluminium and steel
Engineered in Germany
Description

Sometimes it is necessary to send two stereo signals to one device, for example, when two mixing consoles have to drive a stereo power amplifier. In practice, this is rarely possible without ground loops occurring. The Palmer main solves this type of problem. It mixes two stereo input signals via a resistor matrix, whereby the input pair A is galvanically isolated by a transformer in order to avoid ground loops.

The Palmer main works purely passively. The result is a particularly low noise floor and a neutral sound. Thanks to large transformers, it can handle high-level signals up to +20 dBu without distortion. The transformers also make it possible to assign the input pair A unbalanced while the output signal remains balanced.

The passive mode of operation without a power supply makes the Palmer main particularly reliable and failure-proof. The aluminium/steel housing and XLR sockets are also best suited to the rough everyday life on stage. The Palmer main merge box solves typical sound reinforcement problems in the simplest way with uncompromised sound quality.

MAIN - River Series - 1
MAIN - River Series - 1
Specifications
General
Product type
Line summing unit
Channels
2
Type
passive
Transformer isolated
Yes
Number of inputs
4
input type
balanced
Input connectors
XLR
Number of outputs
2
Output type
balanced
Output connectors
XLR
Ground lift switch
Yes
Housing
Aluminium continuous casting
Dimension (H/W/D)
140 x 50 x 128 mm
Weight
0,8 kg
Ambient temperature during operation
-20 - 70 °C
Relative Humidity
< 80 %, not condensing
Accessories (included)
Inscription label (tour label), rubber feet
Audio
Max. input level (< 1% THD, 20 Hz)
+20 dBu
Max. input level (< 1% THD, 1 kHz)
+ 32 dBu
Frequency response (±1 dB, relative 1 kHz)
10 Hz - 80 kHz
Input impedance (1 kHz)
3.3 kOhm
Output impedance (1 kHz)
600 Ohm(s)
THD (30 Hz, +4 dBu, unity, unweighted)
< 0,9 %
THD (1 kHz, +4 dBu, unity, unweighted)
< 0,02 %
IMD (SMPTE) (60 Hz / 7 kHz, 4:1, +4 dBu)
< 0,015 %
Transformer ratio
1 : 1

RIVER SERIES

The River Series represents the pinnacle of Palmer's commitment to delivering exceptional audio tools. It is a harmonious blend of pure, high-quality sound, rugged and reliable design, and thoughtful, user-friendly features. Let the River Series carry your sound naturally and powerfully into the hearts of your listeners. Experience the River Series - where your sound flows.

We know that the demands of stage and studio require equipment that is not only high performing, but also rugged and durable. The River Series represents a new design philosophy that combines form and function to create audio tools that are as rugged as they are stunning. These units are built to last, with rugged metal chassis and reinforced connectors. We've tested them in the harshest conditions, so you can count on the River Series to deliver, gig after gig, session after session, year after year.

Tough and durable new design

We know that the demands of stage and studio require equipment that is not only high performing, but also rugged and durable. The River Series represents a new design philosophy that combines form and function to create audio tools that are as rugged as they are stunning. These units are built to last, with rugged metal chassis and reinforced connectors. We've tested them in the harshest conditions, so you can count on the River Series to deliver, gig after gig, session after session, year after year.

Rewritable Tour Labels

In the world of professional audio, organisation is king. Misplaced or incorrectly connected equipment can turn a flawless performance into an unforgettable disaster. That's why the River Series introduces an innovative feature: rewritable tour labels. These color coded handy labels let you customize your di-boxes, line isolators splitters & mergers, ensuring each piece is in the right place, every time whether in the busy backstage area of a rock concert or the tangled web of cables in a recording studio.

Rewritable Tour Labels

In the world of professional audio, organisation is king. Misplaced or incorrectly connected equipment can turn a flawless performance into an unforgettable disaster. That's why the River Series introduces an innovative feature: rewritable tour labels. These color coded handy labels let you customize your di-boxes, line isolators splitters & mergers, ensuring each piece is in the right place, every time whether in the busy backstage area of a rock concert or the tangled web of cables in a recording studio.

Tough and durable new design

We know that the demands of stage and studio require equipment that is not only high performing, but also rugged and durable. The River Series represents a new design philosophy that combines form and function to create audio tools that are as rugged as they are stunning. These units are built to last, with rugged metal chassis and reinforced connectors. We've tested them in the harshest conditions, so you can count on the River Series to deliver, gig after gig, session after session, year after year.

Tough and durable new design

We know that the demands of stage and studio require equipment that is not only high performing, but also rugged and durable. The River Series represents a new design philosophy that combines form and function to create audio tools that are as rugged as they are stunning. These units are built to last, with rugged metal chassis and reinforced connectors. We've tested them in the harshest conditions, so you can count on the River Series to deliver, gig after gig, session after session, year after year.

Rewritable Tour Labels

In the world of professional audio, organisation is king. Misplaced or incorrectly connected equipment can turn a flawless performance into an unforgettable disaster. That's why the River Series introduces an innovative feature: rewritable tour labels. These color coded handy labels let you customize your di-boxes, line isolators splitters & mergers, ensuring each piece is in the right place, every time whether in the busy backstage area of a rock concert or the tangled web of cables in a recording studio.

Let your signals flow, naturally and powerfully like a river!

Let your signals flow, as naturally and powerfully as a river! The River Series embodies this claim down to the last detail: with high-precision circuitry designed by our award-winning engineers so your sound remains uncoloured until it reaches its destination: the heart of your listeners. That’s exactly what Palmer® stands for. Since 1980, we've been manufacturing audio tools for professional use on stage, in broadcast, and in the studio. Musicians and sound engineers all over the world value our solutions, developed in Germany, for their unobstructed signal flow and pure sound – crystal clear and as alive as water! So what could be more fitting than to name the River Series models after German rivers?

Lass deine Signale fließen, natürlich und kraftvoll wie ein Fluss! Die River Series verkörpert diesen Anspruch bis ins Detail: Mit hochpräzisen Schaltungen, designt von unseren preisgekrönten Ingenieuren, damit dein Sound unverfälscht sein Ziel erreicht: das Herz deiner Zuhörer. Denn genau dafür steht Palmer®. Schon seit 1980 fertigen wir Audio-Tools für den professionellen Einsatz auf der Bühne, beim Rundfunk und im Studio. Musiker und Toningenieure weltweit schätzen unsere in Deutschland entwickelten Lösungen für ihren ungehinderten Signalfluss und reinen Klang – kristallklar und lebendig wie Wasser! Was lag also näher als die Modelle der River Series nach deutschen Flüssen zu benennen? Entdecke unsere zuverlässigen und bewährten DI-Boxen, Re-Amp Boxen, Line-Isolatoren, Splitter und Summierer.

Alle Boxen bauen wir hier in Europa von Hand zusammen!

What is a DI-Box?

DI-Boxes convert unbalanced or high-impedance instrument signals into a signal for direct connection to the microphone input of a mixing console.

Learn more

Do I Need A DI Box For My Guitar?

Learn how a DI box prevents muffled and quiet sounds by optimising guitar and bass signals for mixers and audio interfaces.

Learn more

Downloads & links
Name
Category
Type
File size
User Manual Manual pdf 3 MB
Palmer Catalogue Catalog pdf 31 MB
Product images Image files zip -
User Manual

Category: Manual

Type: pdf

File size: 3 MB

Palmer Catalogue

Category: Catalog

Type: pdf

File size: 31 MB

Product images

Category: Image files

Type: zip

File size: -

(0) Download files
Buy
No suitable online shop found? Then search on Google Shopping Or find a local dealer: