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Single piece from demo - like new with full warranty
HSA-1b
Headphone Speaker Amplifier, Solid-State for SR1, CA1, Planar & Dynamic HPs & Speakers
The HSA-1b from RAAL-requisite is the world’s first switch-drive amplifier for the world-renowned Earfield™ headphone monitor. Built to drive the SR1 directly and switchable to operate conventional headphones or speakers.
It offers both an unbalanced single-ended RCA input and a true balanced XLR input, as well as a rock-solid 24-step precision attenuation control that ensures balance at all listening levels.
Reviews
"The HSA-1b has punch, dynamics and a level of transparency that is truly outstanding and will have you staying up late at night just to listen to one more track. If you already own the SR1a headphones and are looking for an end game amplifier, look no further than the HSA-1b amplifier! Especially if you’re like me and have a collection of other great headphones that you’re looking to drive, this amplifier will scratch every upgrade itch you may have in the future! Highly recommended!"
RAAL Requisite: HSA-1b Headphone / Speaker Amplifier Headphone Guru
Specifications
- Load impedance: 0.03 Ohm - infinite
- Output power (one channel driven): 10W/8 Ohm, 20W/4 Ohm, 40W/2 Ohm, 55W/1 Ohm @ 1kHz/Sine
- Frequency 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
- Maximum power consumption: 150W, 25W without signal
Features
- Inputs: IN1 - RCA pair, IN2 - XLR pair
- Speaker drivers: 8-ohm, 4-ohm, 2-ohm loads
- Dimensions: (H) 3.54" x (W) 8.58" x (D) 12.6"
- Weight: 11.7 lbs
- Ribbon and headphone drive: RAAL-required SR-1a, Dynamic & Planar Magnetic
