Rated Output Power: 125 WRMS
Total Harmonic Distortion: Less than 0.5%, 20 to 20,000 Hz at full rated output
Frequency Response: ±1dB, 20 to 20,000 Hz at full rated output
Input Sensitivity: Hi-Z, 500mV; Lo-Z balanced, with optional transformer, 100mV
Hum and Noise: 90dB below rated output
Output Loads: 4 ohms, 8 ohms, 25VCT (5 ohms), 70V (40 ohms)
Output Regulation: Better than 2dB from no load to full load
Input Impedances: Hi-Z, 50,000 ohms unbalanced; Lo-Z, 600 ohms, balanced or unbalanced,
and 1:1 bridging with optional plug-in transformers
Low-Cut Filter: -10dB @ 100 Hz
Controls & Indicators: Front Panel — Illuminated on/off power switch and overload shutdown LED
Rear Panel — Input level control, Slo-Blo fuse
Internal — Low-Cut filter switch
Power Requirements: 120V AC, 60 Hz, 260 watts @ Full Rated Output (Idle 45W)
Overload Protection: Electronic overload protection
Electrical — 4A Slo-Blo Fuse
Thermal — 220ºF — 105ºC Thermostat
Operating Temperature Range: -4ºF (-20ºC) to +131ºF (+55ºC) at rated output
Auxiliary Receptacle (not switched): Three-wire grounded*, 300 watts maximum
Dimensions (without removable feet): 19" W x 5-1/4" H x 11" D (48.3 x 13.3 x 27.9 cm)
Front Panel Dimensions: 19" W x 5-1/4" H (48.3 x 13.3 cm)
Finish: Black
Weight: 36 lbs. (16.3 kg)
Accessories: Model TL600, 600-ohm line-matching transformer; Model TL100,
1:1 line-matching transformer
*This receptacle will be grounded only if the power amplifier has been grounded properly.
Technical
Specifications
The power amplifier shall be a Bogen Model HTA125A or
approved equal solid-state amplifier incorporating state-of-
the-art MOSFET power transistors. Amplifiers utilizing
conventional or bipolar power transistors shall not be
acceptable.
The amplifier shall deliver an audio output of 125 watts
(RMS continuous). The total harmonic distortion shall be
less than 0.5% at the 125-watt rating over the frequency
range of 20 to 20,000 Hz. The rated output shall be
obtained with an input signal that is not greater than 500
millivolts (RMS). Hum and noise shall be at least 90dB
below rated output. The frequency response, when mea-
sured at full rated output, shall be flat within ±1dB, from 20
to 20,000 Hz.
The amplifier shall provide either balanced or unbalanced
constant voltage outputs of 25 VCT and 70 volts, plus 4-
and 8-ohm balanced or unbalanced outputs. Output regu-
lation shall be within 2dB from no load to full load.
The amplifier shall provide an input of 50,000 ohms unbal-
anced high impedance, or 600-ohm balanced/unbalanced
low impedance, or line bridging with an optional accessory
plug-in transformer. Overall gain shall be adjustable by
means of a single level control located on the rear panel.
An internal low-cut filter (-10dB @ 100 Hz) also shall be
provided.The front of the amplifier shall contain an illumi-
nated on/off power switch.The amplifier shall incorporate
electronic shutdown circuitry that shall activate whenever
an overload or short circuit occurs on the output of the
amplifier. A front panel overload shutdown LED shall illu-
minate to indicate the discontinuance of power output; the
circuitry shall automatically restore power output once the
cause of the shutdown condition has been removed.
The amplifier shall operate from a 120V AC, 60 Hz source
and shall consume 45 watts or less at idle and 260 watts at
full rated output.
The amplifier shall have thermostatic control to prevent
operation at excessive ambient temperatures. The amplifi-
er also shall include electronic overload limiting, short cir-
cuit protection and a 4 amp Slo-Blo fuse.
The amplifier shall have a standard EIA 19-inch front panel
suitable for rack mounting.The amplifier shall be 19" W x
5-1/4" H x 11" D, finished in black and shall weigh 36 lbs.
Architect
and Engineer
Specifications
50 Spring Street, Ramsey, NJ 07446, U.S.A.
Tel: 201-934-8500; FAX: 201-934-9832; www.bogen.com
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