SKU: 32106537152

Sennheiser SK 9000 A1-A4 Bodypack transmitter, digital, HD and LR mode, 3-pin SE socket, 470-558 MHz

Sale price$28943.25 Regular price$32159.17
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 11 - Jul 16

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Sennheiser SK 9000 A1-A4 Bodypack transmitter, digital, HD and LR mode, 3-pin SE socket, 470-558 MHzSennheiser SK 9000 A1 A4 Digital Wireless Bodypack Transmitter The Sennheiser SK 9000 A1 A4 (Article Number: 504730) is the cornerstone pocket transmitter of Sennheisers elite Digital 9000 wireless platform. Built into a highly durable magnesium alloy casing, this reference grade bodypack is designed for premier broadcast studios, international music tours, and complex theatrical productions that demand zero compromises in audio quality or RF

Sennheiser SK 9000 A1-A4 Digital Wireless Bodypack Transmitter

The Sennheiser SK 9000 A1-A4 (Article Number: 504730) is the cornerstone pocket transmitter of Sennheiser’s elite Digital 9000 wireless platform. Built into a highly durable magnesium-alloy casing, this reference-grade bodypack is designed for premier broadcast studios, international music tours, and complex theatrical productions that demand zero compromises in audio quality or RF dependability.

This model operates in the low UHF A1-A4 frequency band (470.000 MHz to 558.000 MHz). Featuring an expansive 88 MHz switching bandwidth, it uses highly advanced digital wireless engineering to perform with absolute linearity, making it immune to intermodulation dropouts on dense event sites.

Key Performance and Digital Transmission Attributes

  • Intermodulation-Free Linear Architecture: The SK 9000 operates completely linearly without generating destructive intermodulation artifacts. This allows sound engineers to organize a rock-solid equidistant frequency grid layout (spacing channels evenly at 600 kHz gaps) to dramatically maximize channel count without complex coordination math.

  • Dual Transmission Profiles (HD and LR):

    • High Definition (HD) Mode: Transmits uncompressed, completely natural digital audio data. It matches the sonic performance of a high-end studio cable, delivering pristine high-frequency detailing for elite vocalists and delicate instruments.

    • Long Range (LR) Mode: Employs Sennheiser’s proprietary high-robustness digital audio codec (SeDAC) paired with enhanced error correction. This mode stabilizes signal transmission over massive distances or through harsh physical obstacles on festival grounds.

  • Moisture-Insulated 3-Pin SE Socket: Outfitted with a premium, gold-plated 3-pin special connector (LEMO style) featuring physical internal gaskets. This design effectively shields the input nodes from stage sweat, heavy humidity, and rain, preventing audio shorts or structural crackle mid-event.

  • Military-Grade AES 256 Encryption: Integrated with hardware-driven AES 256 encryption protocols. Turning this feature on completely secures the digital RF stream, safeguarding sensitive corporate keynotes or secure governmental broadcasts from scanning or hijacking.

Technical Specifications Matrix

Feature Parameter Hardware Specification Profile
Model Reference Name SK 9000 A1-A4
Official Article Number 504730
RF Operational Band A1-A4 Block (470.000 MHz to 558.000 MHz)
Switching Tuning Bandwidth 88 MHz available across the low-UHF spectrum
Digital Transmission Modes High Definition (HD) Mode / Long Range (LR) Mode
Acoustic Frequency Response 30 Hz to 20,000 Hz (flat down to 3 dB)
System Dynamic Range HD Mode: 112 dBA / LR Mode: 104 dBA
Total Harmonic Distortion (THD) Less than 0.03% (measured at 1 kHz)
Audio Input Interface Node 3-pin Moisture-Resistant Locking Socket (Special SE LEMO Pin Out)
Input Impedance Profiles Microphone Input: 68 kOhms / Line Input: 1 MOhms
Audio Gain Adjustment Scale -6 dB to +42 dB (Instrument/Line adjustable in 3 dB steps)
RF Output Transmission Power HD Mode: 10 mW RMS / LR Mode: 25 mW RMS
Power Solution (Transmitter) Optional BA 61 Li-ion Accupack (6.5 hrs) or B 61 Dry Battery Case (3 x AA)
Chassis Build Material Lightweight, high-tensile Magnesium Alloy
Net Operational Weight Approx. 147 grams (including belt clip and battery pack assembly)

In the Box: Component Inventory

  • 1 x SK 9000 Digital Bodypack Transmitter (Black, A1-A4 Band)

  • 1 x Heavy-Duty Belt Clip

  • 1 x Removable Flexible Whip Antenna (Tuned for the A1-A4 range)

  • 1 x Quick Start Reference Manual

  • 1 x Safety Instructions Guide

  • (Note: Battery packs and microphone capsules are sold separately)

System Deployment and Hardware Interfacing Advice

Locking the 3-Pin LEMO Audio Interface: The SK 9000 uses a premium, moisture-resistant 3-pin connector. It pairs seamlessly with high-tier lavalier microphones (such as the MKE 1, MKE 2, MKE 40) and specialized headworn boom mics (like the SL Headmic 1 or HSP series). Ensure that you push the micro-connector into the socket until the outer collar locks with a distinct physical click. Always pull directly on the knurled metal collar to disconnect—never yank on the flexible microphone wire.

Battery Architecture Warning: To maintain low operational costs and stable weight balance, the SK 9000 does not bundle power elements out of the box. You must provision either a BA 61 rechargeable lithium-ion battery pack (delivering roughly 6.5 hours of continuous transmission tracking) or a B 61 dry battery case configured to host three standard AA batteries. Ensure that you monitor real-time battery telemetry via the backlit LCD screen or remotely inside your EM 9046 receiver channel layout.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 32106537152

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.1 ★★★★★
Based on 450 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
S
Verified Purchase
Shae G
Pawtucket, US
★★★★★ 5
Clean Look, Sturdy — can’t ask for more!
Size: 6 Panel-119"W, Color: Grey, Size: 6 Panel-119"W, Color: Grey
Really like how it folds so I can create kind of a doorway with two of these. Pretty easy to assemble and has an uncluttered clean look due to the smooth fabric and nice color. Oh and it’s sturdy enough for pets.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 9, 2024
A
Verified Purchase
Amazon Customer
Lexington, US
★★★★★ 5
Good Product
Size: 3 Panel-102'', Color: Beige
I got these dividers for outdoor use for some privacy from neighbors. They arrived quickly and were easy to set up. They look good, and though the legs don’t offer stability against any amount of wind—which I expected as it wasn’t advertised for outdoor use—all it took was placing a cinder block on the feet to hold it up right. Coverage is good, it’s easy to fold and move as needed, and it’s light weight. All in all a decent product. I will caution the purchase of “used like-new,” as both of the dividers I ordered were previously returned items, and one came missing a cap, instructions were not included, and the poles were all mixed up and not properly labeled. If I had not ordered a second divider (which did include the instructions) I would have had a much harder time figuring out which pieces were which and how to put them together.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2025
J
Verified Purchase
julie h.
New York, US
★★★★★ 5
So versatile! Perfect solution for dividing a room.
Size: 4 Panel-88'', Color: Grey, Size: 4 Panel-88'', Color: Grey
Perfect solution for my space. My office has to double as the hangout room for the kids and I wanted something that would block off my computer so it is left alone. This space allows me to close off my computer as much or as little as I want. It is lightweight yet has sturdy feet. This is important so that if it gets bumped it won’t topple over. The price was great and the build time wasn’t too bad! I would recommend two people for set up. I went with the grey panels and I think I’ll end up hanging some twinkle lights at some point. Great purchase!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 9, 2025
A
Verified Purchase
Abbi
Massapequa, US
★★★★★ 4
4/5 Stars
Size: 4 Panel-88'', Color: Black
Very tall and easy to set up, the only thing I will say is that they do have large gaps in between, so you won't have 100% privacy unless you add a curtain in the back. Other than that, they are easy to fold, sturdy, and esy to assemble. The gaps are an easy fix so I would say they are worth it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026
T
Verified Purchase
Tyi Campbell
Chelsea, US
★★★★★ 5
Great product and worth the money.
Size: 4 Panel-88'', Color: Black
Portable and stable. Perfect size and gives me the privacy I need when working from home. Stability is great as long as you place the stands correctly it won't wobble. I love it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 8, 2026

recommand products