IP-300/450/600D
The amplifier shall be a dual-channel model incorporating all solid state circuitry. Power output
with both channels driven shall be a minimum of 300/450/600 ohms per channel with a 4 ohm
load, 200/300/400 with an 8 ohm load, and 600/900/1200 W mono bridged into an 8 ohm load.
Total harmonic distortion (THD) shall be less than 0.01% at 1k Hz with an 8 ohm load.
Intermodulation distortion (IMD) shall be less than 0.3% using the SMPTE standard of 60 Hz and
7k Hz in a 4:1 ratio respectively with an 8 ohm load. Frequency response, referenced to 1k Hz,
shall be from 20 to 20k Hz (+0 dB, - 0.5 dB) at any level up to the rated output. Hum and noise
below rated output from 20 to 20k Hz shall be 103/105/107 (32 dB gain) and 108/110/112 (26 dB
gain). Input sensitivity shall be 2.2 dBu/4.0 dBu/5.3 dBu (+/- 0.5 dB) which provides 32 dB of gain
for the model’s rated output power. Input impedance shall be 10k ohms for each side of an
electronically balanced input circuit.

A rear-panel mode switch shall provide three modes of input operation: Stereo, Bridged, and
Parallel. In the Parallel mode, each channel’s level shall be independently adjustable. Rear panel
input connectors shall be a 3-circuit balanced 1/4" phone jack and screw-terminal barrier strip.
Rear panel output connectors shall be a screw-terminal barrier strip with eight connections for two
sets of spade lugs or two sets of up to #10 AWG bare wire circuits per channel. The rear panel
shall also have a removable chassis and signal ground jumper. The front panel shall have a
recessed AC power switch to prevent accidental turn-off. The front-panel attenuators shall be
recessed to prevent accidental level changes and may be removed and replaced by included
rubber covers once levels have been properly set.

The front panel shall have two sets of three LED indicators for signal presence, peak clipping,
and protection circuit activation. The front panel shall also have removable air filters that may be
cleaned and reinstalled without removing the amplifier from a rack. The amplifier shall be forced
air variable-speed, fan cooled with fan speed as follows: OFF<104°F (40°C), VARIABLE 104°-
167°F (40° to 75°C), and HIGH > 167°F (75°C).

Built-in protection circuitry shall monitor Voltage and current levels to minimize potential damage
from overloads, and disable output during shorts, DC offset, or excessive operating temperature s
over 167°F (110° C) via a relay for each channel. The relay shall also delay amplifier connection
to the load during turn-on for four seconds while the protection circuitry analyzes the load. In-rush
current limiting shall minimize turn-on current surges when multiple units are powered-up
remotely to prevent AC breaker overload. Current draw shall be shall be no more than
430/660/940 VA according to the UL/CSA standard and rated power shall be no more than
1200/1800/2400 VA.

The amplifier shall have front panel carrying handles that are easily removed to accommodate
shallow rack doors. It shall use only two standard rack-spaces or 3-1/2" (88.9 mm) and its
dimensions shall be 19" (482 mm) W x18-5/8" (473.5 mm) D x 4" (102.4 mm) H with feet, or 3-
3/8" (86.4 mm) H without feet. Front panel finish shall be zinc die cast in black and case finish
shall be sheet steel in black. Weight shall be 28.6 lbs. (13 kg); 28.6 lbs. (13 kg); 39.7 lbs. (18 kg)
respectively.

The amplifier shall be TOA model IP-300D / IP-450D / IP-600D.