ETI Sound Systems, INC US-1800 사용자 설명서

THE BEAUTY OF POWER

Cooling fans with variable speed controls. Air enters

the amplifier through vents located on the front alu-

minium panel. Do not block the front vents or the fans 

on the rear panel of the amplifier.

Connect the input source to these electronically bal-

anced Combo connectors using either XLR or 1/4”

TRS plugs. The 1/4” TRS and XLR plug are config-

ured: Pin 2 (Tip) - hot, Pin 3 (Ring) - cold, and Pin 1

(Sleeve) – shield/ground. We recommend using bal-

anced three-conductor cables. A stereo signal should

be connected to both the Channel 1 and Channel 2 

input jacks for 2-channel (stereo) operation.

NOTe: Unbalanced two-conductor 1/4” plugs 

 

can also be inserted into these input Combo  

 

connectors. But using unbalanced connectors  

 

may increase noise and hum. See more  

 

information about balanced and unbalanced  

connections in the CONNECTIONS section later  

 

in this manual.

NOTe: For BRIDGED MONO or PARALLEL  

MONO use the Channel 1 input jack only.

These XLR jacks are used to send a signal to a seper-

ate amplifier (chaining). The LINK XLR jacks are con-

nected in parallel to the input Combo jacks.

Use these slide switches to activate the built-in High 

Pass filters. The HPF rolls off signals below 50Hz. This 

improves the bass performance of most full range 

speakers by reducing uncontrolled and excessive

speaker cone motion. Engaging the HPF switch when

using full range speakers makes more power avail-

able to the speaker’s rated frequency range, leading 

to higher SPLs.