H-Amp™ Specifications

The Radial H-Amp is a speaker to headphone converter that passively attenuates the signal from a loudspeaker to safely supply one or two sets of headphones. level controls along with a basic EQ allows the user to adjust the tone going to the headphones to compensate for the incoming signal. As the source is typically full range mono, the output is also mono.

H-Amp Block Diagram
Click to enlarge
Specifications are subject to change without notice.
Circuit type: Passive, mono with variable level control
Maximum input: 400 watts RMS
Attenuation: -28dB with 40 Ohms headphone
Input impedance: Varies with headphone impedance, 80 Ohms minimum
Output impedance: 8 Ohms ~ 600 Ohms headphones
Spk input: Speakon NL4FC - full range speaker level
Pin +1 = speaker positive / Pin -1 speaker negative
Headphone outputs: ¼" Phone (x2); 3.5mm TRS
LED indicators: Signal present & peak overload
Filter: High, mid & low-cut fixed frequency filters
Construction: 14 gauge chassis, outer shell
Finish: Durable powder coat
Size: 3.3" x 5.0" x 2" (84 x 127 x 48mm)
Weight: 1.55 lb (720g)
Shipping size: 4" x 3" x 6.5 (102 x 76 x 165mm)
Shipping weight: 1.85 lb ( 840g)
Power Requirements: 100% passive, no power required
Conditions: For indoor use at temperatures between +5° c and +40° c
Warranty: Transferable 3 year warranty