Thronmax Caster Microphone Boom Arm With Internal USB Cable (S1)
Caster S1 — studio-grade boom arm with built-in USB cable
A broadcast studio-grade all-tube boom arm with internal springs and hidden cable management. The S1 carries a built-in USB cable through the arm for a completely clean setup.
- Extruded aluminium
- Hidden internal cable
- 360° rotation
- 32" reach
- C-clamp

What it does well.

Studio-grade design
An all-tube design with internal springs. Friction hinges are hand-tightened and full 360° rotation covers any application. Caster stays in place after adjusting, and the robust C-clamp locks to your desk.

Hidden cable management
The USB cable runs inside the arm, so nothing hangs loose around your desk or mic.

Game streaming, podcasting & broadcast
Your secret weapon for Twitch streams — put your mic where you want it, when you want it.

Works with your mic
Designed for all Thronmax mics and other professional broadcast mics, and compatible with all standard shock mounts.
The numbers.
- Boom type
- Extruded aluminium
- Desktop mount
- C-clamp
- Product weight
- 1400 g
- Rotation
- 360° horizontal
- Reach
- 32" max length
- Hold
- 1.8 lb incl. mic and shock mount (straight)
- Cable management
- Hidden internal USB cable
- Threading
- Standard 5/8", adapter for 3/8"
What you get.
- Caster desktop boom arm (microphone not included)
- C-clamp for desktop mount
- 1/4"-20 male to 5/8" adapter
- 3/8"-20 male to 5/8" adapter
- Built-in cable
- Type-C / micro / mini USB adapters
Good to know.
Is a microphone included?
No. The stand is sold without a microphone.
What is the difference between S1 and S2?
Both are the same Caster arm — S1 has a built-in USB cable, S2 has a built-in XLR cable.
How much weight can it hold?
Up to 1.8 lb including microphone and shock mount in the straight position.