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RAAL-requisite HSA-1b Amplifier

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Our Take

The HSA-1b by RAAL-requisite is the world’s first switch drive amplifier for their world renowned Earfield™ headphone monitor. Built to direct drive the SR1a and switch to power conventional headphones or spekaers. Offering both unbalanced single-ended RCA and True-Balanced XLR input alongside a rock-solid precision 24-step attenuator for balance at all listening levels.

True Ribbon™ SR1a. The world's first Earfield™ headphone monitor now with OEM Switch Drive Amplification available!

Three Package Options Available

• HSA-1b

• SR1a + HSA-1B / Roller Carry On Case

• SR1a + HSA-1B / Interface Box / Roller Carry On Case

All with a 5 year Manufactor Warranty

RAAL HSA-1b Ribbon/HP/Speaker Amp - Features

Inputs: IN1 - RCA pair, IN2 - XLR pair

Speaker Drive: 8 ohm, 4 ohm, 2 ohm Loads

Dimensions: (H) 3.54" x (W) 8.58" x (D) 12.6"

Weight: 11.7 lbs

Ribbon & Headphones Drive: RAAL-requisite SR-1a, Dynamic &Planar Magnetic

RAAL HSA-1b Ribbon/HP/Speaker Amp - Specs

Load Impedance: .03 ohm - infinity

Output Power (one channel driven): 10W/8 ohms, 20W/4 ohms, 40W/2 ohms, 55W/1 ohm @ 1khz/sine

Freq Response: 100mv/ in/sin 15hz-500kHz

Power Bandwidth: 100kHz (-3dB) at 1khz

Frequency Range:30Hz - 30KHz

Signal to Noise Ratio: < 90dB

Input Impedance: 40 kOhm

Sensitivity: < 0,5V/40kOhm

Max Power Consumption: 150W, without signal 25W

HSA-1B & SR1a

About RAAL-requisite

RAAL-requisite represents two legendary brands in ultra high-end audio, coming together, to create a sound unlike anything the world has ever heard before.