9
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• DO NOT connect a speaker load with a total
impedance below the minimum rating of your
amplifier to prevent damage to your equipment.
• DO NOT connect speaker(s) with a total power
handling capacity that is less than the power output
rating of your amplifier to prevent damage to your
equipment.
• ALWAYS switch your system power OFF before
connecting or disconnecting speakers.
• ONLY use unshielded speaker cable of 18 gauge or
heavier (16 or 14 gauge) for speaker connections.
Shielded instrument cable WILL NOT work and may
damage your equipment.
• ONLY connect one amplifier to each speaker load.
Two amplifiers connected to a single load WILL NOT
work and may damage your equipment.
Use the impedance and power ratings on your amplifier
and speakers to determine if a particular combination
of speakers is appropriate for your amplifier. NOTE: All SWR®
speaker enclosures, as well as most others, will be connected
in parallel (NOT series) when linked (daisy-chained) together.
Therefore, these guidelines apply only to parallel speaker
configurations.
The speaker illustration gives you the total impedance
load calculations for various speaker impedance
combinations (Ω=ohms). The ideal speaker load (total
impedance) is equal to the minimum impedance
rating of your amplifier. Operating below the
amp's minimum impedance rating can overheat
your amplifier and cause damage. Operating above
the amp's minimum impedance rating, while safe,
reduces the amplifier’s maximum power output.
Something else to consider: You can obtain the
same
group
total impedance load from different
combinations of speaker impedances (see
illustration). If each speaker in a group has the
same impedance, each speaker will receive the same
amount of power from your amplifier.
However
, if
impedances are not all equal, the lowest impedance
speakers will get the most power. For example, if you
connect an 8Ω and a 16Ω speaker to an amp output
of 30 watts, the 8–ohm speaker will receive about 20 of
those watts (and be twice as loud as the 16-ohm speaker).
Take this into consideration when calculating power handling
capacities and when positioning your speaker enclosures.
For an in-depth discussion of setup tips for amplifiers and speakers
(including a look at impedance and power rating issues), visit the
Support
area of the SWR website at
www.swramps.com
.
Speaker Guidelines
Specifications
TYPE:
PR 761
PART NUMBERS:
4420500010 (120V, 60Hz)
4420503010 (240V, 50Hz) AUS
4420504010 (230V, 50Hz) UK
4420506010 (230V, 50Hz) EUR
4420507010 (100V, 50Hz) JPN
POWER REQUIREMENT:
575W
POWER AMP:
MINIMUM OUTPUT IMPEDANCE:
4Ω
POWER OUTPUT:
160W RMS into 4Ω @ < 1% THD, 1kHz
PRE AMP:
INPUT IMPEDANCE:
4.7MΩ (1/4" input); 20kΩ (XLR input)
SENSITIVITY AT FULL POWER:
9mV (1/4" input); 900µV (XLR input)
TONE CONTROLS:
±15dB @ frequency knob setting
COMPRESSION:
RATIO:
1:1 to 20:1
EFFECTS LOOP:
SEND IMPEDANCE:
1kΩ
RETURN IMPEDANCE:
10kΩ
BALANCED LINE OUT:
SEND IMPEDANCE:
50Ω
SPEAKERS:
WOOFER:
Eminence Neo 10" 4 ohm (0076017000)
HORN:
Eminence 8 ohm (0067254000)
DIMENSIONS:
HEIGHT:
19.5 in (49.5 cm)
WIDTH:
15 3/8 in (39 cm)
DEPTH:
14.5 in (36.8 cm)
WEIGHT:
26.5 lb (11.6 kg)
Product specifications are subject to change without notice.
