Can an 18-channel amp bring audiophile performance throughout your home? Yes, if it’s from Sherbourn! Define up to 9 separate stereo zones with 40 watts per channel, all channels driven, or add more PA 18-45s or 12-45s as necessary to cover your whole house. You can even combine channels for even more power—120W into 8 ohms for 6 channels!
- Two stereo input buses with buffered loop outputs
- Independent inputs available for all 18-channels
- Channel pairs are bridgeable
- 12-volt trigger input and auto-sensing power-on
- Advanced protection circuitry
- 10-year warranty
- Rack mount ears included
Analog inputs:
2 bus inputs (Bus 1, Bus 2); each bus has one stereo pair of unbalanced (RCA) inputs.
18 individual channel inputs; each channel has one unbalanced (RCA) input.
Analog outputs:
2 bus outputs (Bus 1, Bus 2); each bus has one stereo pair of unbalanced (RCA) outputs which provide a buffered copy of the input signal.
Input sensitivity (for full output):
370 mV (8 ohm load).
Speaker outputs:
18 pairs of 5-way binding posts (standard red and black); one pair per channel;
(in bridge mode, speakers are connected to the red binding posts of both channels in the zone).
Minimum recommended load impedance:
Individual channels; 4 Ohms (which equals one 4 Ohm load or two paralleled 8 Ohm loads).
Bridged channels; 8 Ohms.
Power output (per channel):
45 watts RMS per channel (x18); into 8 Ohms; two channels driven.
70 watts RMS per channel (x18); into 4 Ohms; two channels driven.
40 watts RMS per channel (x18); into 8 Ohms; six channels driven.
140 watts RMS per channel (x9); into 8 Ohms (bridged) .
S/N ratio:
> 100 dB (A-weighted).
Frequency response:
20 Hz to 20 kHz + / - 0.1 dB at 1 watt (-3 dB at 80 kHz).
Trigger and control:
Trigger Input: 3 - 30 V AC or DC.
Trigger Output: 12 V DC 10 mA max.
Inputs and Outputs
Analog inputs:
2 bus inputs (bus 1, bus 2); each bus has one stereo pair of unbalanced (RCA) inputs.
18 individual channel inputs; each channel has one unbalanced (RCA) input .
Input sensitivity (for full output into 8 Ohms):
370 mV
Speaker outputs:
18 pairs of 5-way binding posts (standard red and black); one pair per channel
(in bridge mode, speakers are connected to the red binding posts of both channels in the zone).
Minimum recommended load impedance:
Individual channels: 4 Ohms (one 4 Ohm load or two paralleled 8 Ohm loads per channel).
Bridged mode: 8 Ohms minimum load per bridged channel .
Trigger and control:
Trigger Input (mono 1/8”), Trigger Output (mono 1/8”).
Front panel controls and indicators:
On / Off (large push button); toggles Standby mode.
On / Off LED (1); red indicates Standby mode; blue indicates normal operation.
Zone Status LEDs (9); blue indicates normal operation; flashing blue indicates a fault;
(each LED indicates the status of one zone (channel pair);
(Zone Status LEDs are not lit in Standby mode).
Rear panel controls and indicators:
Power (rocker switch); switches mains power.
Input Voltage (protected slide switch); selects 115 or 230 VAC line voltage.
Power Mode slide switch (Auto / On / Triggered).
Bridge Mode switch (9); labelled BR / ST for Bridge / Stereo (Independent) mode;
one per zone / pair of channels; configures each zone / channel pair;
as either two separate output channels (Stereo) or one bridged output channel.
Line In switch (18); one per channel; selects the input source for the channel;
(Bus 1, Bus 2, or individual input).
In bridged mode, only one input is active per bridged pair of channels.
Volume (18); sets input level / gain for each channel.
In bridged mode, only one Volume control is active per bridged pair of channels;
(the input and controls from the odd numbered channel are active).
AC power input:
IEC C17/C18 (10/15A two wire) type inlet and power cord.
AC Power line fuse (rear panel holder).
Download detailed specifications:
PA 1845 8 ohm
