RAAL-requisite HSA-1b | Headphone & Speaker Amplifier

Our Take
If you love the SR1a, but want more of the incredible soundstage and vivid imaging, and more of the neutral, realistic delivery, the HSA-1b gives you just that.
 
Read the full review.




From RAAL-requisite

The HSA-1b is a the perfect pair for the RAAL-requisite SR1a, but it can also be used to drive speakers and a wide variety of other headphones.






Headphone & Speaker Amplifier





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







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.

 





Specs



Load Impedance:
0.3 Ohm – infinity


Output Power (one chanel 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)


Price:
$4,500 USD



Optional:
Waterproof Flight Case w/Handle & Casters $350 USD



Selectable Mains Volatge:
115/230V (100V available for Japan)