RAAL-requisite HSA-1b Amplifier

Headphone & Speaker Amplifier.

Direct drive amplifier for True-Ribbon Earfield Monitor headphones, speakers, conventional dynamic, and planar magnetic headphones.

Switch Drive.

Drive the SR1a, conventional headphones, or speakers.

Input Options.

Unbalanced, Single-Ended RCA. True-Balanced, XLR.

24 Step Attenuator.

Precision 24-step attenuator for rock-solid left/right balance at all listening levels.

In the box

• HSA-1b amplifier
• HSA-1b power cable
• Adaptor for low-efficiency headphones

HSA-1b – Headphone/Speaker Amplifier Specs

Load Impedance:	0.3 Ohm – infinity
Output Power (one channel driven):	10W /8Ω, 20W/4Ω, 40W/2Ω, 55W/1Ω @ 1khz/sine
Ribbon & Headphones Drive:	RAAL-requisite SR-1a, Dynamic & Planar Magnetic
Speaker Drive:	8Ω, 4Ω, & 2Ω Loads
Freq. Response:	100mv/ in/sin. 15hz – 500kHz
Power Bandwidth:	100kHz (-3db) at 1khz
Distortion:	< 0,5% at 1khz
Signal to Noise Ratio:	Better than 90dB
Input Impedance:	40 kOhm
Sensitivity:	0,5V /40kOhm
Input:	IN1- 2 RCA, IN2 – 2 XLR
Max Power Consumption:	150W , without signal 25W
Dimensions:	H 90, W 218, D 320mm (3.54 x 8.58 x 12.60 inches)
Weight:	5,3kg (11.68 pounds)
Selectable Mains Voltage:	115/230V (100V available for Japan)
Warranty	5 years