# RAAL-requisite HSA-1a - True Ribbon Headphone & Speaker Amp - Official Thread

**URL:** <https://forum.headphones.com/t/raal-requisite-hsa-1a-true-ribbon-headphone-speaker-amp-official-thread/6029>\
**Category:** DACs and Digital\
**Tags:** raal-requisite\
**Created:** [April 7, 2020, 11:09pm UTC](https://forum.headphones.com/t/raal-requisite-hsa-1a-true-ribbon-headphone-speaker-amp-official-thread/6029 "2020-04-07T23:09:47Z")\
**Posts on this page:** 1\
**Showing post:** 177

<div class="post-metadata">

**Author:** ![Torq](https://sea2.discourse-cdn.com/flex016/user_avatar/forum.headphones.com/torq/32/16384_2.png) [@Torq](https://forum.headphones.com/u/Torq)\
**Post date:** [January 1, 2021, 9:05pm UTC](https://forum.headphones.com/t/raal-requisite-hsa-1a-true-ribbon-headphone-speaker-amp-official-thread/6029/177 "2021-01-01T21:05:10Z")

</div>

And … I finally got the [HSA-1b review](https://forum.headphones.com/t/raal-requisite-hsa-1b-switch-drive-amplifier-review/9973) posted - which I did in a dedicated thread, since the HSA-1a is no longer sold, and the HSA-1b differs enough it is a distinct product.

You can find it [here](https://forum.headphones.com/t/raal-requisite-hsa-1b-switch-drive-amplifier-review/9973).

---

_[View the full topic](https://forum.headphones.com/t/raal-requisite-hsa-1a-true-ribbon-headphone-speaker-amp-official-thread/6029)._