Penn Slammer IV Review: Ultimate Insight

In the fishing world, having the right gear can make all the difference between a successful day on the water and a frustrating one.

Regarding spinning reels, the Penn Slammer series has long been a favorite among anglers for its durability and performance.

This review will dive deep into the latest addition to the lineup – the Penn Slammer IV spinning reel.

Discover how this reel can take your fishing game to the next level.

Penn Slammer IV review

The Penn Slammer IV: A Brief Overview

The Penn Slammer IV is the fourth generation of this iconic spinning reel series.

It’s designed to cater to the needs of both recreational and professional anglers, offering a blend of power, precision, and durability.

Let’s take a closer look at some of its standout features. One of the first things you’ll notice about the Penn Slammer IV is its rugged construction.

It boasts an IPX6 sealed body and spool design, making it highly resistant to water intrusion and ideal for saltwater and freshwater use.

The reel also features a full metal body, side plate, and rotor, ensuring it can withstand the most challenging conditions.

 Penn has equipped the Slammer IV with their CNC Gear technology, which involves precision machining of the main gear.

This results in a gear system that’s incredibly smooth and maximizes power and torque, allowing you to handle larger fish easily.

 The Slammer IV features a sealed Slammer Drag System with Dura-Drag material.

This provides consistent drag pressure and ensures that your drag stays smooth and reliable even in the harshest environments.

Why should you buy Penn Slammer IV

Performance on the Water

Let’s discuss how the Penn Slammer IV performs in real-world fishing situations.

Whether you’re casting lures to chase after fast-moving game fish or bottom fishing for big, stubborn species, this reel shines.

Casting Distance and Accuracy: The Slammer IV excels in casting distance and accuracy thanks to its precision CNC-machined gear system and smooth drag.

You can consistently hit your target spot, whether a specific rock formation or the sweet spot for a bass school.

Power and Versatility: The Slammer IV’s powerful drag system and robust build allow you to tackle many fish species. 

This reel can handle everything from aggressive saltwater predators like snook and redfish to freshwater giants like pike and musky.

Smooth Retrieve: The reel’s 6+1 stainless steel bearing system ensures a silky-smooth retrieve, minimizing line twists and ensuring a seamless angling experience.

Main Features Of Penn Slammer IV 

Full Metal Body and Sideplate: The Penn Slammer IV boasts a full metal body and sideplate, which enhances its durability and ensures that it can withstand the toughest fishing conditions. 

This robust construction makes it suitable for both saltwater and freshwater fishing.

CNC Gear Technology with Brass Main Gear: Including CNC Gear technology with a brass main gear is a standout feature.

This precise machining results in an exceptionally smooth gear system maximizes power, and provides the necessary torque to handle larger, more aggressive fish.

IPX6 Sealed Body and Spool Design: Penn has taken extra measures to protect your reel from water intrusion with the IPX6 sealed body and spool design. 

This makes the Slammer IV perfect for saltwater anglers, where exposure to moisture and salt can be particularly challenging.

Penn Slammer IV

Sealed Slammer® Drag System with Dura-Drag™: The drag system on the Slammer IV is not only sealed for added protection but also offers a wider range of usable drag.

 This means you can easily adjust your drag settings to match the specific requirements of different fish species while enjoying a smooth and reliable drag experience.

8+1 Stainless Steel Bearing System: A smooth retrieve is essential when battling powerful fish, and the 8+1 stainless steel bearing system delivers exactly that. It reduces line twist and ensures a seamless angling experience.

Hydrophobic Line Roller Bearing: Adding a Hydrophobic Line Roller Bearing further enhances the reel’s performance by repelling water and preventing corrosion, helping maintain the reel’s smooth operation over time.

Spare EVA Handle Knob: In larger sizes (3500-10500), Penn includes a spare EVA handle knob, providing anglers with the convenience of a backup handle.

Bail Trip Options: The Slammer IV offers different bail trip options depending on the size.

Sizes 2500-5500 have an automatic bail trip, while sizes 6500-10500 have a manual bail trip for added control.

Brass Pinion Gear: Penn has incorporated a brass pinion gear into the Slammer IV to enhance durability and longevity. 

This gear material is known for its exceptional strength and corrosion resistance.

Line Capacity Rings: The Slammer IV comes with line capacity rings on the spool, making it easy to gauge how many lines you have left. 

This is a small yet incredibly useful feature for those moments when precision counts.


  • Exceptional Durability: The full metal body, sealed design, and brass gear make the Slammer IV incredibly durable and resistant to harsh conditions.
  • Smooth Operation: With its precision-machined gears and stainless steel bearings, this reel offers an impressively smooth operation, reducing line twists and enhancing casting and retrieval.
  • Versatility: Whether you’re chasing saltwater giants or freshwater trophy fish, the Slammer IV’s drag system and build can handle it all.
  • Customizable Drag: The wide range of usable drag settings allows anglers to fine-tune their reel to match the specific needs of different fish species.


  • Size and Weight: The Slammer IV may be slightly bulkier and heavier than some other spinning reels, which could concern anglers seeking ultra-light setups.
  • Price: While the Slammer IV offers exceptional performance and durability, it comes at a premium price point, making it less accessible to budget-conscious anglers.

 Penn Slammer IV spinning reel is a top-tier choice for anglers who demand nothing but the best. 

Its robust construction, advanced features, and smooth operation make it a reliable companion on any fishing expedition.

Main Features Of Penn Slammer IV 

Why should you buy Penn Slammer IV?

Buying a Penn Slammer IV spinning reel can be a great decision for anglers looking for a reliable, high-performance reel. 

Here are several reasons why you might want to consider purchasing the Penn Slammer IV:

Durability: The Penn Slammer IV is known for its rugged construction. 

With a full metal body and side plate, it can withstand the toughest fishing conditions, whether you’re fishing in saltwater or freshwater.

Water Resistance: The IPX6 sealed body, spool design, and sealed drag systems make the Slammer IV highly resistant to water intrusion. 

This level of protection is ideal for anglers who fish in environments where exposure to water is everyday.

CNC Gear Technology: Including CNC Gear technology with a brass main gear results in an incredibly smooth gear system that maximizes power and torque. This is crucial for handling larger and more aggressive fish.

Versatility: The Slammer IV’s drag system offers a wide range of usable drag settings, making it versatile for targeting different fish species and adapting to various fishing techniques.

Smooth Operation: The 8+1 stainless steel bearing system ensures a silky-smooth retrieve, reducing line twists and providing a seamless angling experience.

Hydrophobic Line Roller Bearing: Adding a Hydrophobic Line Roller Bearing enhances the reel’s performance by repelling water and preventing corrosion, contributing to its long-term reliability.

Spare Handle Knob: In larger sizes (3500-10500), Penn includes a spare EVA handle knob, offering an added convenience for anglers.

Bail Trip Options: Different bail trip options are available for the Slammer IV, depending on its size.

Power and Control: The Slammer IV’s power and torque make it suitable for freshwater and saltwater fishing, allowing anglers to target a wide range of fish species.

Brand Reputation: Penn is a well-established and trusted fishing industry brand known for producing high-quality fishing equipment.

Longevity: With proper care and maintenance, Penn Slammer reels are built to last, offering anglers a reel that can withstand years of fishing adventures.

How to cast a spinning reel

Casting a spinning reel is a fundamental skill in fishing, and it’s essential to do it correctly to maximize your casting distance and accuracy.

Here’s a step-by-step guide on how to cast a spinning reel:

1. Set Up Your Reel

  • Make certain that your fishing line is correctly spooled onto the reel.
  • Open the bail (the wire loop that covers the spool) by flipping it up or back, depending on your reel’s design.
  • Hold the rod and reel with your dominant hand (right hand for right-handed anglers and vice versa), and keep the rod’s handle (reel seat) between your fingers.

2. Hold the Line

  • Hold the fishing line against the rod just above the reel with your non-dominant hand. 
  • Gently hold the line between your index finger and thumb.
  •  This prevents the line from slipping off the spool prematurely.

3. Prepare to Cast

  • Position yourself with your dominant shoulder facing the direction you want to cast.
  • Maintain your balance by keeping your feet at shoulder-width apart.
  • Keep your rod tip pointed straight up or slightly angled forward, but not more than 45 degrees.

4. Load the Rod: To prepare for the cast, bend your casting arm at the elbow while keeping your wrist straight. This loads the rod and stores energy for the cast.

5. Aim and Release

  • Look at your target, a specific spot in the water where you want your lure to land.
  • To cast, swing the rod forward, releasing the line by lifting your index finger slightly. The line should flow freely off the spool.
  • As the rod tip reaches the forward position, release your index finger completely, allowing the line to flow off the spool and sending your lure toward the target.

6. Control the Line: Maintain control with your index finger after releasing the line. Lightly touch the line to your rod to control its release.

To stop the line from coming off the spool, manually close the bail with your free hand by flipping it back over it.

7. Retrieve Your Lure: Start reeling in your lure by turning the reel handle. Be prepared for any strikes as you retrieve your bait or lure.


  • Practice your casting technique in an open area, like a park or a field, before hitting the water to build confidence and accuracy.
  • Use the appropriate casting weight for your rod and reel combo to achieve better casting results.
  • Be gentle with your casts. The key is to use a smooth and controlled motion rather than brute force.
  • Keep your casting arm and wrist relaxed to avoid strain or fatigue.

Remember that casting techniques can vary slightly depending on the rod and reel you’re using, so it’s a good idea to familiarize yourself with your equipment and practice your casting to improve your skills over time.


The Penn Slammer IV is a formidable option for anglers seeking precision, power, and durability in spinning reels.

 Its rugged construction, advanced technology, and versatile performance make it an excellent choice for both seasoned pros and beginners looking to up their game.

Whether you’re a saltwater fan or prefer the peacefulness of freshwater angling, the Penn Slammer IV offers the features and performance to cater to your needs.

 It’s a reel built to last and designed to help you land the fish of your dreams.

 So, gear up with the Penn Slammer IV and conquer the waters like never before. Your next big catch might be a castaway.

Check out the What Size Hook for Bass available on our website.

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