Enclosure:  3/4" 7-ply poplar plywood - Black Carpet
Low Frequency Transducer: 18" INFRA cone
3" Voice coil
120 oz. Magnet

Input Connectors:
2 - Dual banana
2 - Neutrik Speakon

Grille:
16 Gauge black vinyl coated
perforated steel
Standard Hardware:
2 - Recessed handles
4 - Machined aluminum speaker
mounting clamps
8 - Interlocking corners

Finish:
Black carpet
Dimensions: 
22"h x 22.5"w x 18.5"d  
56 cm x 57 cm x 47 cm

Weight:
69 lbs.
31 kg

Shipping Dimensions:
24" x 25" x 21"
61 cm x 64 cm x 53 cm

Shipping Weight:
77 lbs. 35 kg



Dynamic Filter
Balanced inputs
Internal frequency modifications
Convenient front panel controls

Use Elf-1 output with INFRA Loudspeakers only.
GENERAL SPECIFICATIONS
Input Connectors: XLR female
Input Configuration: Balanced
Alternate Input Configuration: Unbalanced
Maximum Input Signal: 4.5V (+16 dBu)
Output Connectors: XLR male
Output Configuration: Unbalanced
Maximum Output Signal: 4.5 V (+16 dBm)
Nominal Output Impedance: 50 Ohms
Power-on Indication: Green LED
Operating Input Voltage: 12 - 15 VDC
Operating Current Required: 200 mA
Input Voltage Connector: Miniature DC 2.5 mm
Input Voltage Polarity: Center pin +

Elf-1 SPECIFICATIONS
Maximum Elf-1 Gain: 10 dB
Maximum Elf-1 Attenuation: 10 dB
INFRA Cutoff Frequency Programming: Plug in resistors
INFRA Cutoff Frequency: 8 Hz to 40 Hz, Factory set 18 Hz
INFRA Output Mode: Sum in Stereo Mode
Nominal Dynamic Filter Threshold: 0 dBu Output
Minimum Dynamic Filter Threshold: -10 dBu Output
Maximum Dynamic Filter Threshold: +10 dBu Output
Maximum Dynamic Filter Reduction Capability at 18Hz: 30 dB
Dynamic Filter Threshold Exceeded Indication: Red LED
Elf-1 Circuit Noise: < -90 dBu (20 Hz to 20 kHz)
Elf-1 Dynamic Range: > 105 dB (20 Hz to 20 kHz) (bandwidth unweighted)
HI PASS SPECIFICATIONS
Maximum Hi Pass Gain: 10 dB
Maximum Hi Pass Attenuation: 10 dB
Hi Pass Filter Frequency Programming: Plug in resistors
Factory Set Hi Pass Filter Frequency: - 3 dB @ 130 Hz/-6 dB @ 97 Hz
Hi Pass Filter Frequency Range: 50 Hz to 200 Hz
Hi Pass Filter Slope: 12 dB/octave
Hi Pass Circuit Noise: < -85 dBu (20 Hz to 20 kHz)
Hi Pass Dynamic Range: > 105 dB (20 Hz to 20 kHz) (bandwidth unweighted)

PHYSICAL SPECIFICATIONS
Enclosure: Black powder coated steel
Enclosure Mounting: 1U EIA rack (1.75")
Dimensions: 1.75"h x 19"w x 5.25"d (5 cm x 49 cm x 14 cm)
Weight: 5 lbs. (2.3 kg)
Shipping Dimensions: 6" x 22" x 12" (16 cm x 59 cm x 31 cm)
Shipping Weight: 7 lbs. (3.2 kg)