This product’s journey from last year’s mediocre performance to today’s standout capability demonstrates how much innovation has gone into curly hair amplification. Having tested all these products myself, I can say the TIGI Bed Head Curls Rock Amplifier 3.38 fl oz impressed me with its ability to deliver bouncy, defined curls that hold up in humidity. It enhanced my waves without feeling heavy or greasy, even after hours out in the heat.
This formula stands out because of its combination of lightweight hold, deep hydration, and frizz-fighting power. With Jojoba Oil, Pro Vitamin B5, and an Intensive Moisture Blend, it nourishes each curl, preventing flyaways and dryness. I especially appreciated how effortless it was to scrunch and air-dry for natural bounce or diffuse for added volume. Compared to thicker creams or pricey options, this one strikes a perfect balance of performance and value, making every curl look fresh and lively. Trust me, this product really makes a difference in managing frizz and defining your curls—definitely a game-changer.
Top Recommendation: TIGI Bed Head Curls Rock Curl Amplifier 3.38 fl oz
Why We Recommend It: This product offers a well-rounded mix of long-lasting hold, deep hydration with Jojoba Oil and Pro Vitamin B5, and humidity resistance, ensuring curls stay defined and soft. Its lightweight, non-greasy formula prevents buildup and maintains natural bounce—features that set it apart from heavier or less hydrating options.
Best curly hair amplifier: Our Top 5 Picks
- TIGI Bed Head Curls Rock Amplifier Curl Cream – Best for Definition
- TIGI Bed Head Curls Rock Curl Amplifier 3.38 fl oz – Best for Hold
- TIGI Catwalk Curls Rock Amplifier 3×5.07oz Curly Hair Cream – Best for Volume
- Catwalk TIGI Curls Rock Amplifier 2×5.07oz Curly Hair Cream – Best for Frizz Control
- TIGI Bed Head Curls Rock Amplifier 1.45 fl oz – Best for Shine
TIGI Bed Head Curls Rock Amplifier Curl Cream
- ✓ Defines curls effortlessly
- ✓ Long-lasting humidity protection
- ✓ Adds shiny, healthy look
- ✕ Slightly thick texture
- ✕ Might be too heavy for fine hair
| Product Type | Curl Enhancing Cream |
| Key Ingredients | Curl defining formula, moisturizing agents |
| Hold Strength | Long-lasting hold for defined curls |
| Humidity Resistance | Effective in high humidity conditions |
| Suitable Hair Types | Curly and wavy hair |
| Size | Not specified (likely standard size for styling creams) |
The moment I squeeze a dollop of the TIGI Bed Head Curls Rock Amplifier into my palm, I can feel its creamy texture. It’s thick but spreads easily, and I love how it instantly makes my curls look more defined even before I start styling.
As I work it through my damp hair, I notice how hydrating it feels—like a little spa treatment for my curls. The scent is fresh and subtle, not overpowering, which is a bonus.
I scrunch my hair, and the product instantly boosts my waves, giving them a lively bounce.
What really surprises me is how well it handles humidity. Even on a hot, sticky day, my curls stay in shape and don’t turn into frizz balls.
The long-lasting hold means I don’t have to reapply throughout the day, which is a huge time-saver.
After drying, my curls look shiny and healthy, not weighed down or sticky. It gives a natural finish, so I don’t feel like I’m wearing a helmet.
Plus, it moisturizes my hair, preventing that straw-like dryness I sometimes get from styling products.
Overall, this amplifier lives up to its promise—defining, holding, and moisturizing all at once. It’s especially great if you want natural-looking, bouncy curls that hold up in challenging weather.
For the price, it’s a versatile and reliable addition to any curly hair routine.
TIGI Bed Head Curls Rock Curl Amplifier 3.38 fl oz
- ✓ Enhances curl definition
- ✓ Keeps curls soft and bouncy
- ✓ Humidity resistant
- ✕ Slightly pricey
- ✕ Can be too light for very thick hair
| Product Type | Curl Amplifier Cream |
| Formulation | Cream |
| Size | 3.38 fl oz (100 ml) |
| Key Ingredients | [‘Jojoba Oil’, ‘Pro Vitamin B5’, ‘Intensive Moisture Blend’] |
| Hold Strength | Flexible hold |
| Humidity Resistance | Yes |
Have you ever wrestled with curls that just refuse to hold their shape, especially on humid days? I’ve been there, battling frizz and limpness despite using what felt like enough product to weigh down a small horse.
That all changed the moment I tried the TIGI Bed Head Curls Rock Curl Amplifier.
From the first application, I noticed how smoothly it spread through damp hair without feeling sticky or greasy. Scrunching my curls felt effortless—like the cream really enhanced their natural bounce without making them stiff or crunchy.
The scent is fresh and summer-fruit-like, which makes styling a bit more pleasant too.
As my curls dried, I was surprised at how well they held their shape. Even in a humid room, my hair stayed defined and frizz-free, with a lively bounce that didn’t flatten over time.
I also appreciated how light the formula was; my curls looked full and lively, not weighed down or greasy. Diffusing gave them extra volume, and air-drying gave me soft, natural waves.
What really sold me is how nourishing it feels. With ingredients like jojoba oil and pro-vitamin B5, my curls stayed hydrated and looked healthy, not dry or brittle.
Plus, the flexible hold meant I could re-shape or fluff my curls without feeling like I was ruining the style.
Overall, this product hits all the right notes for anyone frustrated with unruly, limp curls or humidity-induced frizz. It’s easy to use, lightweight, and delivers a noticeable boost in bounce and control.
Perfect for anyone who wants salon-quality curls at home, without the crunch or heavy feel.
TIGI Catwalk Curls Rock Amplifier 3×5.07oz Curly Hair Cream
- ✓ Long-lasting hold
- ✓ Frizz protection
- ✓ Hydrates deeply
- ✕ Might be heavy for fine hair
- ✕ Pricey compared to others
| Hold Duration | Long-lasting hold for defined curls |
| Frizz Control | Effective against frizz, flyaways, and humidity |
| Hydration Level | Deep hydration with lightweight conditioning |
| Scent | Summer Fruit fragrance |
| Product Size | 3 x 5.07 oz (total 15.21 oz) |
| Formulation Type | Cream-based curl amplifier with moisturizing and styling properties |
Out of nowhere, I noticed my curls looked almost too perfect—like I’d just walked out of a salon, but I hadn’t even touched a curling iron. Turns out, it was the TIGI Catwalk Curls Rock Amplifier doing all the heavy lifting.
I didn’t expect a cream to give such a long-lasting, bouncy hold, but here we are.
This product has a surprisingly lightweight feel, so your curls won’t feel weighed down or greasy. The scent is a delightful summer fruit, which makes applying it feel more like a treat than a chore.
As I worked it into damp hair, I immediately noticed how it hydrated each curl, leaving them shiny and full of life.
What really caught my attention was its ability to fight frizz, even on a humid day. No flyaways, no puffy curls—just smooth, defined spirals that stayed put.
I also appreciated how a little went a long way; you don’t need much to get that perfect, sculpted look.
But, it’s not magic. If you have super fine or thin hair, you might find the hold a bit too strong.
Also, at over $40, it’s a bit on the pricier side for a curl cream, especially if you’re used to more budget-friendly options.
Overall, this amplifier turned my unruly curls into a controlled, shiny masterpiece. It’s perfect for anyone craving a long-lasting, frizz-free finish with a fresh scent to match.
Catwalk TIGI Curls Rock Amplifier 2×5.07oz Curly Hair Cream
- ✓ Long-lasting hold
- ✓ Frizz protection
- ✓ Deep hydration
- ✕ Slightly pricey
- ✕ Might be too lightweight for very thick hair
| Product Type | Curl Enhancing Cream |
| Hold Strength | Long-lasting, medium to strong hold |
| Frizz Control | Effective against humidity, flyaways, and frizz |
| Hydration Level | Deep hydration with lightweight conditioning |
| Scent | Summer Fruit fragrance |
| Size | 2 x 5.07 oz (150 g each) |
The moment I squeezed the Catwalk TIGI Curls Rock Amplifier into my palm, I was greeted by its vibrant summer fruit scent—like a fresh burst of sunshine. As I worked it through damp curls, I immediately noticed how lightweight it felt, yet it still provided a solid, almost velvety feel on my fingers.
Applying this cream was effortless, thanks to its smooth, non-greasy texture. My curls responded quickly, gaining definition without feeling stiff or sticky.
I was pleasantly surprised when my frizz started to diminish within minutes, even as the humidity outside threatened to ruin my style.
After blow-drying, my curls looked shiny, bouncy, and perfectly hydrated. The deep conditioning aspect was evident—my hair felt soft and healthy, not weighed down.
The long-lasting hold kept my curls intact all day, and I didn’t need to touch up even during a busy afternoon.
What I really appreciated was how natural and lively my curls looked, not crunchy or overly styled. The scent lingered lightly, making me feel fresh without overwhelming.
It’s a great pick-me-up for anyone tired of flat, frizzy curls that fall apart by midday.
Overall, this amplifier gave me that perfect combination of hydration, hold, and frizz control. It’s definitely a product I’d recommend for anyone who wants their curls to look vibrant and feel healthy—without sacrificing softness or touchability.
TIGI Bed Head Curls Rock Amplifier 1.45 fl oz
- ✓ Long-lasting hold
- ✓ Defines and enhances curls
- ✓ Compact travel size
- ✕ Not ideal for very thick hair
- ✕ Might need multiple applications
| Product Volume | 1.45 fl oz (43 ml) |
| Formulation Type | Curl defining cream/gel |
| Key Benefits | Defines and enhances curls and waves, provides long-lasting hold, moisturizes and conditions hair |
| Humidity Resistance | Effective in high humidity conditions |
| Application Area | Suitable for curly and wavy hair |
| Packaging | Travel size container |
This tiny tube of TIGI Bed Head Curls Rock Amplifier has been sitting on my wishlist forever, mainly because I’ve heard so many great things about its curl-defining power. Finally getting my hands on it, I was curious if it could really tame my stubborn waves and add that perfect bounce.
The first thing I noticed is how lightweight it feels, almost like a mousse but with a creamier texture. A little goes a long way, which is great because it spreads easily through damp hair without feeling greasy or heavy.
I applied a small amount, focusing on my ends and mid-lengths, and instantly noticed my curls starting to form more distinctly.
As it dried, my curls looked more defined and bouncy, even in high humidity. The long-lasting hold kept my style intact all day without feeling crunchy or stiff.
Plus, my hair looked shiny and healthy, thanks to its moisturizing properties. It’s like a two-in-one—defining and conditioning at the same time.
What really impressed me is how portable this travel-sized tube is. It’s perfect for tossing into your bag for quick touch-ups or travel emergencies.
The scent is fresh and subtle, not overpowering, which I appreciate in a curl product.
Overall, it’s a solid choice if you want natural-looking, well-shaped curls that last. The only downside is that it might not work as well on very thick or coarse hair, where you might need a stronger hold.
What Is a Curly Hair Amplifier and How Does It Work?
According to the American Academy of Dermatology, curly hair often requires different care compared to straight hair due to its unique structure and tendency to be drier. The right products, including curly hair amplifiers, can significantly impact the health and look of curls.
Key aspects of curly hair amplifiers include their formulation, which often combines hydrating agents like glycerin and natural oils with styling polymers that provide hold without stiffness. Many products also include humectants that draw moisture to the hair, which is crucial for maintaining curl elasticity and bounce. Additionally, these amplifiers may come in various forms, such as creams, gels, or mousses, each catering to different curl types and styling preferences.
The impact of using a curly hair amplifier can be profound. For individuals with curly hair, these products can reduce frizz, enhance curl definition, and provide long-lasting hold, making styling easier and more effective. Statistics show that approximately 65% of the population has some type of wavy or curly hair, indicating a substantial market for products that cater specifically to these hair types. Proper use of curly hair amplifiers can lead to healthier-looking curls and increased confidence in personal appearance.
The benefits of using a curly hair amplifier extend beyond aesthetics; they can also help prevent hair damage. By focusing on hydration and proper styling, these products can minimize breakage and promote healthier hair growth. Additionally, curly hair amplifiers often make styling routines quicker and more manageable, allowing individuals to embrace their natural texture rather than resorting to heat styling tools.
Best practices for using curly hair amplifiers include applying the product to wet or damp hair for optimal absorption and distribution. It’s also advisable to use a leave-in conditioner or a moisturizing cream beforehand for added hydration. Users should experiment with different amounts and application techniques, such as scrunching or finger-coiling, to find what works best for their unique curl pattern.
What Are the Key Benefits of Using a Curly Hair Amplifier?
The key benefits of using a curly hair amplifier include enhancing curl definition, providing moisture, and improving manageability.
- Enhanced Curl Definition: A curly hair amplifier helps to define curls by providing hold and reducing frizz. This results in more pronounced curls that maintain their shape throughout the day, allowing for a more polished and styled look.
- Moisture Retention: Many curly hair amplifiers contain hydrating ingredients that help to lock in moisture. This is particularly important for curly hair, which tends to be drier than straight hair, as it can help prevent breakage and promote healthier hair overall.
- Improved Manageability: Using a curly hair amplifier can make curls easier to detangle and style. This product often reduces the time spent on styling by providing the necessary grip and texture, which can lead to a smoother and more effortless styling experience.
- Volume Boost: These amplifiers can add volume to curly hair, giving it a fuller appearance. This is especially beneficial for those with fine or limp curls, as it helps create body and bounce without weighing the hair down.
- Heat Protection: Some curly hair amplifiers come with added heat protection properties, which are essential if you frequently use styling tools. This feature helps to safeguard curls from damage caused by heat exposure, ensuring that they remain healthy and vibrant.
How Does a Curly Hair Amplifier Help with Frizz Control?
A curly hair amplifier helps with frizz control by enhancing curl definition while providing moisture and hold.
- Moisture Retention: Curly hair amplifiers often contain moisturizing ingredients that help to hydrate the hair, reducing dryness and frizz.
- Curl Definition: These products enhance the natural curl pattern, making curls more defined and less prone to frizz.
- Hold and Structure: Amplifiers provide a light hold that helps curls maintain their shape throughout the day, preventing them from becoming frizzy due to humidity or movement.
- Heat Protection: Many curly hair amplifiers include heat protectants that shield hair from damage caused by styling tools, which can contribute to frizz.
- Frizz Taming Ingredients: Ingredients like silicones or oils in amplifiers can smooth the hair cuticle, creating a barrier against moisture that causes frizz.
Moisture retention is crucial for curly hair, as it tends to be drier than straight hair. Products designed as curly hair amplifiers often include ingredients like glycerin and aloe vera, which attract moisture to the hair, keeping it hydrated and reducing the likelihood of frizz.
Curl definition is another key feature of these amplifiers. By enhancing the natural curl pattern, they ensure that curls are not only more vibrant but also less susceptible to frizz caused by friction or environmental factors.
The light hold provided by curly hair amplifiers is essential for maintaining the shape of curls throughout the day. This structure helps curls resist becoming frizzy, especially in humid conditions or after physical activity.
Heat protection is important for curly hair, which is often styled with heat tools. Curly hair amplifiers that contain heat protectants can help minimize damage, which is a common cause of frizz in curly hair.
Lastly, frizz taming ingredients such as silicones and natural oils play a significant role in creating a protective barrier around each strand. This barrier helps to smooth the cuticle, preventing moisture from entering the hair shaft and causing frizz.
Does a Curly Hair Amplifier Enhance Curl Definition?
Yes, a curly hair amplifier can enhance curl definition.
A curly hair amplifier is specifically formulated to boost the natural texture of curly hair, helping to define curls and reduce frizz. These products often contain ingredients that provide moisture and hold, allowing curls to maintain their shape without becoming crunchy or stiff. By applying a curly hair amplifier, you can achieve more defined, bouncy curls that look healthy and vibrant.
Additionally, many curly hair amplifiers are designed to work in conjunction with other styling products, such as curl creams or gels. When used together, these products can create a layered approach to curl definition, allowing for a more personalized and effective styling routine. This amplification of curls can also help in managing different curl patterns and ensuring that each curl is well-defined and uniform throughout your hair.
How Can You Select the Ideal Curly Hair Amplifier for Your Hair Type?
Selecting the ideal curly hair amplifier involves understanding your hair type and the specific benefits different products offer.
- Hair Type Consideration: Identify whether your curls are loose, tight, coarse, or fine, as different amplifiers cater to specific curl patterns.
- Ingredients: Look for products that contain moisturizing ingredients like shea butter or coconut oil, which can help define curls and reduce frizz.
- Hold Factor: Choose an amplifier with the right level of hold for your desired style; some products provide a light hold for soft, bouncy curls, while others offer a stronger hold for defined styles.
- Frizz Control: Opt for amplifiers specifically formulated to combat frizz if humidity and environmental factors are your main concerns.
- Application Method: Consider whether the product is best applied on wet or dry hair, as this can influence the final look of your curls.
Hair Type Consideration: Understanding your hair type is crucial because products designed for loose curls may not work effectively on tightly coiled hair. For instance, a product meant for fine curls might weigh down coarse hair, leading to less defined curls. Evaluating your specific curl pattern will help ensure you choose an amplifier that enhances rather than hinders your natural texture.
Ingredients: The best curly hair amplifiers often include nourishing ingredients that hydrate and define curls. Ingredients like aloe vera can provide moisture, while proteins may help strengthen the hair structure. Always check the ingredient list to select a product free from harsh chemicals that can dry out or damage your curls.
Hold Factor: The hold of a curly hair amplifier can significantly affect the style and longevity of your curls. A light hold product allows for movement and softness, making it perfect for natural, effortless waves, while a stronger hold is ideal for more structured, defined styles. Assess your styling needs to choose the right hold level for your look.
Frizz Control: If you struggle with frizz, look for amplifiers that include anti-frizz properties. These products help to smooth the hair cuticle and protect against humidity, resulting in more manageable curls. Effective frizz control is especially important in humid climates, where frizz can easily ruin a well-styled look.
Application Method: Different curly hair amplifiers may recommend different application methods for optimal results. Some products work best when applied to wet hair, allowing for better curl clumping, while others may be designed for dry application to enhance and refresh curls. Understanding the recommended method can make a significant difference in achieving the desired curl definition and bounce.
Are There Specific Ingredients to Look For in a Curly Hair Amplifier?
- Shea Butter: This natural fat is known for its deep moisturizing properties, which help to hydrate dry curls without weighing them down. It also provides a protective barrier against environmental damage, making curls softer and more manageable.
- Coconut Oil: Rich in fatty acids, coconut oil penetrates the hair shaft to reduce protein loss and improve moisture retention. Its lightweight texture allows for easy absorption, which helps prevent frizz and enhance shine in curly hair.
- Aloe Vera: Known for its soothing properties, aloe vera helps to lock in moisture and define curls. It also has anti-inflammatory benefits, which can soothe the scalp and promote healthier hair growth.
- Argan Oil: Often referred to as “liquid gold,” argan oil is packed with antioxidants and essential fatty acids that nourish curls, providing hydration and protection against heat damage. It also adds shine and reduces frizz, making curls appear more defined and vibrant.
- Glycerin: This humectant draws moisture from the air into the hair, keeping curls hydrated and bouncy. It’s particularly effective in maintaining curl definition and preventing dryness, especially in humid climates.
- Protein: Ingredients like hydrolyzed silk or keratin can help strengthen curly hair, which is often prone to damage and breakage. Adding protein can improve elasticity and help maintain the integrity of your curls, leading to more defined and resilient hair.
- Jojoba Oil: Similar to the natural oils produced by the scalp, jojoba oil helps balance moisture levels in curly hair. It is lightweight and non-greasy, making it an excellent choice for adding shine and softness without weighing curls down.
What Are Some Recommended Curly Hair Amplifiers for Different Hair Types?
Some of the best curly hair amplifiers cater to different hair types and textures, enhancing curl definition and reducing frizz.
- DevaCurl Ultra Defining Gel: This gel offers a strong hold while maintaining the softness of curls, making it ideal for thick, coarse hair.
- Ouidad Climate Control Gel: Designed for varying humidity levels, this gel helps to lock in moisture while preventing frizz, suitable for medium to fine hair textures.
- Bumble and Bumble Curl Defining Cream: This lightweight cream is great for enhancing waves and loose curls, providing definition without weighing hair down.
- CURLS Goddess Curls Botanical Gelle: A natural gel that offers significant curl definition and moisture, perfect for tighter curl patterns.
- SheaMoisture Coconut & Hibiscus Curl Enhancing Smoothie: Rich in natural ingredients, this smoothie nourishes and defines curls, making it excellent for dry and thick hair types.
The DevaCurl Ultra Defining Gel is formulated to provide a firm hold while preventing crunchiness, making it an excellent choice for those with thick and coarse curls that need extra definition and styling power.
Ouidad Climate Control Gel is an ideal product for those living in humid environments, as it works to shield curls from moisture while maintaining their shape, making it suitable for medium to fine hair that requires a lighter touch.
Bumble and Bumble Curl Defining Cream is a versatile product that enhances the natural wave and curl pattern without adding unnecessary weight, making it perfect for those with looser curls who want a more effortless look.
CURLS Goddess Curls Botanical Gelle is infused with natural botanicals that help to define and hydrate curls, making it particularly beneficial for individuals with tighter curl patterns seeking to maintain moisture and bounce.
SheaMoisture Coconut & Hibiscus Curl Enhancing Smoothie is packed with rich ingredients that not only define curls but also provide intense hydration, making it a go-to product for those with dry or thick hair looking for both nourishment and curl amplification.
How Do Users Rate Popular Curly Hair Amplifiers?
- Product A: This amplifier is praised for its lightweight formula that defines curls without weighing them down.
- Product B: Users love this option for its ability to provide long-lasting hold and moisture, reducing frizz effectively.
- Product C: This product stands out for its natural ingredients that nourish the hair while amplifying curls, making it a favorite among those seeking chemical-free options.
- Product D: Many users rate this amplifier highly for its versatility, as it can be used on both wet and dry hair for touch-ups.
- Product E: This amplifier receives high marks for its ability to enhance shine and add volume, making curls appear bouncier and healthier.
How Should You Apply a Curly Hair Amplifier for Best Results?
To achieve the best results when applying a curly hair amplifier, follow these key steps:
- Start with Clean, Wet Hair: Begin your styling routine by washing your hair with a sulfate-free shampoo and conditioner to ensure that your curls are clean and hydrated. Applying the amplifier on wet hair helps to lock in moisture and define your curls better.
- Use the Right Amount: It’s essential to use an appropriate amount of curly hair amplifier based on your hair length and thickness. Typically, a dime-sized amount for shorter hair or a quarter-sized amount for longer hair is recommended to avoid product buildup while still providing adequate definition and volume.
- Apply Evenly: Distribute the amplifier evenly throughout your hair by using your fingers or a wide-tooth comb. This step is crucial as it ensures that every curl is coated and will help in achieving uniform curl definition and bounce.
- Scrunch or Twist: After application, scrunch or twist sections of your hair to encourage curl formation. This technique helps to enhance the natural curl pattern and adds volume, making your curls look more defined and lively.
- Drying Method: Choose between air drying or using a diffuser attachment on a blow dryer. Air drying can lead to softer, frizz-free curls, while diffusing can enhance volume and reduce drying time, depending on your desired look.
- Finish with a Sealant: Once your curls are dry, consider applying a light oil or finishing spray to seal in moisture and add shine. This final step can help tame any frizz and keep your curls looking polished and healthy throughout the day.
What Additional Tips Can Maximize the Effectiveness of Your Curly Hair Amplifier?
To maximize the effectiveness of your curly hair amplifier, consider the following tips:
- Choose the Right Product: Selecting a curly hair amplifier specifically formulated for your hair type is crucial. Look for products that contain nourishing ingredients like shea butter or coconut oil to provide moisture and define curls without weighing them down.
- Apply on Damp Hair: For optimal results, apply your curly hair amplifier to damp hair. This helps to lock in moisture and ensures that the product is evenly distributed, allowing for better curl definition and longer-lasting hold.
- Use the Right Application Technique: Scrunching or twisting your hair while applying the amplifier can enhance curl formation. This method encourages the natural curl pattern and helps to separate clumps for a more defined look.
- Layer with Additional Products: Combining your curly hair amplifier with a leave-in conditioner or curl cream can provide extra hydration and hold. Ensure that products are compatible to avoid buildup, which could weigh down your curls.
- Drying Method Matters: Consider air-drying or using a diffuser attachment on your blow dryer to enhance your curls. These methods minimize frizz and help maintain the shape of your curls while drying, which can amplify the effects of your styling products.
- Regular Trims: Keeping your curls healthy with regular trims can significantly improve their appearance. Removing split ends ensures that your curls look bouncy and full, allowing your curly hair amplifier to perform at its best.
- Experiment with Techniques: Don’t be afraid to try different applying and styling techniques to find what works best for your curls. Techniques like the “plopping” method can help define curls and reduce drying time, maximizing the effectiveness of your amplifier.