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 10 - Jul 15

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

4.0 ★★★★★
Based on 2397 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
A
Verified Purchase
Amazon Customer
Lake Worth, US
★★★★★ 5
Super cute
Color: Bunny (Mauve), Size: Small
Super cute and fuzzy. Definitely perfect size for a puppy and not too loud. The fur is very soft and the nose is sown on not a hard piece that can be chewed on. Very good quality too.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2026
B
Verified Purchase
Buyer
Pawtucket, US
★★★★★ 4
Normally amazing
Color: Spiky Ball (Blue, Orange), Size: Medium
We have purchased these slightly spiky dog balls several times for our very strong jaw heavy chewer dogs and they’ve been amazing. They don’t break down they don’t get torn apart the squeakers don’t even pop out of them. So we ordered another package because we’ve lost a few outside to the lawnmower… oops and the package that got delivered today had only one ball that squeaks and the other does not. THIS IS A PROBLEM ! Unfortunately my female dog got to the new squeaking ball first and my male got to the non-squeaking ball and he was NOT happy. Basically once they claim a ball it’s theirs and the other dogs don’t go near the ball they claimed. So he’s following my female around and every time she squeaks the ball and I’m just waiting for him to attempt to take it from her causing damage to her. Normally… These are amazingly fun, tough, durable but also squeaking balls (that’s rare in a tough ball) that my dogs absolutely love. This time just got a bad batch I guess. When they squeak the dogs LOVE them. After several months of play the squeaker might break inside of the ball but the ball never comes apart or gets damaged. And we as the owners love that they don’t break down are not able to be ripped or torn even by our very strong jawed and big jaw muscle dogs. They are also great for in the house play because they’re small enough that they fit completely inside our dog‘s mouth but obviously not small enough to get swallowed so when we throw them in the house for fetch the dogs can jump up and catch them fully in their mouth so they don’t cause any damage to the walls when they hit the walls. They’re not super heavy but they’re incredibly durable. Definitely worth the price especially if you have heavy chewers or big jaw muscle dogs.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
M
Verified Purchase
MADDY
Battle Creek, US
★★★★★ 5
Best fun indestructible toy
Color: Crinkle Duck (Yellow), Size: Large
Truly indestructible no matter how much our oittie tries. She has owned it for three months works at destroying every day with no success. She carries it everywhere. Best purchase for chewer, more fun than the popular rubber heavy duty toy. Do not hesitate your pup will thank you for this fun distraction.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
P
Verified Purchase
peter contino
Chelsea, US
★★★★★ 5
My dog loves this toy!
Color: Bunny (Gray), Size: Large, Color: Bunny (Gray), Size: Large
High quality, big toy, perfect for a medium to large size dog. After a few months of serious chewing I had to buy another one, but well worth the money! Rocky loves it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 11, 2026
D
Verified Purchase
Denise Boyd
Phoenix, US
★★★★★ 4
Great toy but if your dog is an aggressive chewer, please think twice.
Color: Crinkle Chicken (Brown), Size: Large
I received this on May 23rd and on June 8th, after playing with this thing every day, our recently acquired 36 lb dog finally ripped it open and got out all the plastic and the squeaky part. Lily Belle will miss you, chicken. Lily loooooved this toy! She'd toss it in the air, chew on it, pull it with her teeth etc. but as much as she loved it, we won't replace it. It's just not durable enough for her. If your dog is an aggressive chewer, you might want to try a different toy. I hate that this lasted just a smidge over two weeks because Lily seemed to truly enjoy this toy. RIP, squeaky chicken!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 9, 2026

recommand products