Garage
Shop
Account Icon
Account
Box Icon
Track
order
Telephone Icon
Call
Help Icon
Help
Door with Arrow Icon
Sign In
  1. Home
  2. JL Audio Store
  3. Discontinued JL Audio Car Audio & Electronics
  4. Discontinued JL Audio Car Amplifiers
  5. Discontinued JL Audio Monoblock Amplifiers

Discontinued JL Audio Monoblock Amplifiers

Experience deep, impactful bass with JL Audio's monoblock amplifiers.

Match Amps to Subs
Filters
JL Audio ✕
Clear Filters
Reset Done
Product Type
Price Range
Number of Channels
Each channel on an amplifier will power one speaker using a positive and negative cable. There are various types of amplifiers, each designed to power a certain number of speakers. Monoblock amplifiers, also known as single channel, are designed to power one or more subwoofers. These amplifiers often have very high power ratings. On the other hand, multi-channel amplifiers power multiple speakers, usually at lower power ratings. 2-Channel and 4-Channel amplifiers can power car speakers or low powered subwoofers. Occasionally you might see a 5 or 6-channel amplifier that can power speakers and subwoofers at the same time. The most common setup is a monoblock amp to run subwoofers and a 4-channel amp to run door speakers. Check out our Knowledge Base for more information.
Amplifier Key Features
Amplifiers can offer a diverse array of features. If you select more than one feature, then you will view amplifiers that have ALL features selected. These include speaker-level inputs that facilitate seamless integration with factory audio systems, Bluetooth connectivity suitable for ATV/UTV or Classic vehicle setups, built-in DSPs that provide enhanced control over your audio signal, and a host of other functionalities to explore.
Amplifier Class

An amplifier increases the power of the signal being fed to it by taking energy from its power supply and matching the signal but increasing its amplitude. Amplifiers use many different methods for converting these electrical signals and have been categorized into classes.

Class A/B: Greater than 50% of the input signal is amplified while the other percentage is “off”. These amplifiers have a small amount of current flowing through the output transistors all the time which almost eliminates crossover distortion. Class A/B has great sound quality but is not as efficient as class D. These amps are most commonly used to drive speakers.

Class D: Also known as switching amplifiers, class D amps have output transistors that are completely turned “on” or “off”. This means that when the transistors are on, there is almost no voltage across them but when they are off there is significant voltage but no current flowing through it which makes these amplifiers very efficient at the cost of sound quality. These amps are most commonly used to drive subwoofers.

Other Classes: You may see classes such as GH, bD, X, FD, etc. by some manufactures. These amplifiers tend to be either class A/B, D or a hybrid of the two but with improvements to their designs that can make them more efficient or offer better sound quality.
Total RMS Power Output
Total RMS power is measured by multiplying RMS power per channel by the number of channels, and is calculated at the lowest level of operating impedance.

RMS power is the amount of continuous power, measured in watts, that an amplifier produces is called RMS power. The higher the RMS figure, the louder and cleaner your music sounds.

The RMS output figure is much more accurate than the peak rating when comparing products.
Total Peak Power Output
The total peak power output is measured as the wattage per channel multiplied by the number of channels, and is calculated at the lowest level of operating impedance.

It is measured during a brief musical burst, such as a sudden drum accent. Some manufacturers display peak power ratings on the face of their products to increase the appeal.

The RMS power rating is more accurate, and we recommend using it for product comparison.
Series
Many brands group their products into series or lines of products to help customers know the level of quality (good, better, best for example). You can filter by series and the brand using our guided browsing.
Minimum Impedance Unbridged
The lowest impedance the amplifier will handle when it is not bridged.
Minimum Impedance Bridged
The lowest impedance the amplifier will handle when it is bridged.
Remote bass/level controller
If the amp comes with a bass/gain remote you will be able to control the level of your bass from your dashboard. Typically bass remotes also include a 16-20 ft. wire for installation.
Sonic Certified Amplifier
Sonic Certified amplifiers have been tested by the experts at Sonic Electronix to meet or exceed the wattage ratings provided by the manufacturer. If this is marked as Yes, then you can trust the wattage ratings. If marked as No, then we have tested the amplifier and it did not meet the advertised wattage ratings. If marked as Not Tested, then the Sonic Electronix experts have not yet been able to test the amp.
Preamp Outputs
Many amplifiers are equipped with RCA preamp outputs which pass the original music signal from the source to additional amplifiers. This is known as daisy chaining because the source connects to the first amp, and the first amp connects to the second amp, etc. The advantage to daisy chaining is you only need one 2-channel RCA cable to transfer the signal from the head-unit to the amplifier, and then one additional cable for each amp being daisy chained.
Built-in Crossover

A crossover is a type of filtering system that permits only certain frequencies to play. A Low-Pass (LP) crossover allows only frequencies below its setting to get through which is good in the case of some subwoofers. A High-Pass(HP) filter allows frequencies above its setting to pass through, this is normally used on speakers.

When a crossover is set to FULL it means no filtering is added and the full frequency spectrum is allowed through the amplifier. Filtering is important because feeding a speaker frequencies it cannot reproduce effectively creates distortion.

Amp Bluetooth Connectivity
This feature will tell you if the amplifier has the capability to connect to a Bluetooth device.
Deals
Promotions we have offer More Ways to Shop for items that are on clearance, last chance, special offer and sales, Made in America, and more!
Condition

Find compatible amplifiers for subs you own or want with our powerful AmpliFinder® tool.

Match Amps to Subs

Shop the Category

filter-icon Filters & Sort
You are currently viewing discontinued products.

JL Audio e1200

MonoBlock Amplifier

E1200 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio e1200

MonoBlock Amplifier

200W RMS Class AB Monoblock Amplifier • Absolute Symmetry dual N-Channel MOSFET output design • Built-in Crossover (HPF/LPF 20 - 500Hz) • 200W x 1 @ 2 Ohm RMS • 120 W x 1 @ 4 Ohm RMS • Pass-through RCA Outputs • High-level Inputs • CEA-2006 Compliant

4

200W RMS Class AB Monoblock Amplifier • Absolute Symmetry dual N-Channel MOSFET output design • Built-in Crossover (HPF/LPF 20 - 500Hz) • 200W x 1 @ 2 Ohm RMS • 120 W x 1 @ 4 Ohm RMS • Pass-through RCA Outputs • High-level Inputs • CEA-2006 Compliant

** CLOSEOUT!! ** JL Audio e1400D

500 watts, Class D Monoblock Amplifier

e1400D big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

** CLOSEOUT!! ** JL Audio e1400D

500 watts, Class D Monoblock Amplifier

500W RMS Class D Monoblock Amplifier • High-Damping Class D Circuit • Built-in Crossover: LPF 20 - 400Hz • 500W x 1 @ 2 Ohm RMS (14.4V) • 320 W x 1 @ 4 Ohm RMS (14.4V) • Pass-through RCA Outputs • High-level Inputs • CEA-2006 Compliant

7

500W RMS Class D Monoblock Amplifier • High-Damping Class D Circuit • Built-in Crossover: LPF 20 - 400Hz • 500W x 1 @ 2 Ohm RMS (14.4V) • 320 W x 1 @ 4 Ohm RMS (14.4V) • Pass-through RCA Outputs • High-level Inputs • CEA-2006 Compliant

JL Audio JX500/1D

500W RMS JX Series Monoblock Class D Subwoofer Amplifier

JX500/1D big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio JX500/1D

500W RMS JX Series Monoblock Class D Subwoofer Amplifier

• RMS: 300W x 1 @ 4 ohm, 400W x 1 @ 3 ohm, 500W x 1 @ 2 ohm
• Unregulated PWM switching type power supply
• Class D Circuitry
• Bass Boost: 0-12 dB
• Speaker-level (high-level) inputs with included harness
• Dimensions: 7.68"W x 10.94"L x 2.09"H

6

• RMS: 300W x 1 @ 4 ohm, 400W x 1 @ 3 ohm, 500W x 1 @ 2 ohm
• Unregulated PWM switching type power supply
• Class D Circuitry
• Bass Boost: 0-12 dB
• Speaker-level (high-level) inputs with included harness
• Dimensions: 7.68"W x 10.94"L x 2.09"H

JL Audio JX250/1D

250W RMS at 2 Ohms(160W RMS at 4 Ohms) JX Series Class-D 1-Channel 2-Ohm Stable Amplifier

JX250/1D big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio JX250/1D

250W RMS at 2 Ohms(160W RMS at 4 Ohms) JX Series Class-D 1-Channel 2-Ohm Stable Amplifier

• 160Watts RMS x 1 @ 4 ohm
• 250 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 250 Watts

4

• 160Watts RMS x 1 @ 4 ohm
• 250 Watts RMS x 1 @ 2 ohm
• Total Peak Power: 250 Watts

JL Audio A1200

500W A Series Class AB Monoblock Amplifier

A1200 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio A1200

500W A Series Class AB Monoblock Amplifier

A Series 1-Channel Class AB Car Amplifier • 175W x 1 chan. @ 4 ohm • 275W x 1 chan. @ 2 ohm • 500W x 1 chan. Max • Unregulated MOSFET power supply • Class AB with patented Absolute Symmetry dual-N Channel MOSFET output design • RCA level inputs

2

A Series 1-Channel Class AB Car Amplifier • 175W x 1 chan. @ 4 ohm • 275W x 1 chan. @ 2 ohm • 500W x 1 chan. Max • Unregulated MOSFET power supply • Class AB with patented Absolute Symmetry dual-N Channel MOSFET output design • RCA level inputs

JL Audio e1800D

Class D Monoblock Amplifier

E1800D big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio e1800D

Class D Monoblock Amplifier

1000W RMS Class D Monoblock Amplifier • High-Damping Class D Circuit • Built-in Crossover: LPF 20 - 400Hz • 1000W x 1 @ 2 Ohm RMS (14.4V) • 640W x 1 @ 4 Ohm RMS (14.4V) • Pass-through RCA Outputs • High-level Inputs • CEA-2006 Compliant

4

1000W RMS Class D Monoblock Amplifier • High-Damping Class D Circuit • Built-in Crossover: LPF 20 - 400Hz • 1000W x 1 @ 2 Ohm RMS (14.4V) • 640W x 1 @ 4 Ohm RMS (14.4V) • Pass-through RCA Outputs • High-level Inputs • CEA-2006 Compliant

JL Audio Slash v2 250/1v2

250W RMS, Slash Version 2 Series Class D Monoblock Amplifier

250/1v2 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio Slash v2 250/1v2

250W RMS, Slash Version 2 Series Class D Monoblock Amplifier

Slash v2 Series Class D Monoblock Car Amplifier • 250W x 1 chan. @ 1.5-4 ohm • MOSFET power supply • Differential-balanced with RCA jack inputs

7

Slash v2 Series Class D Monoblock Car Amplifier • 250W x 1 chan. @ 1.5-4 ohm • MOSFET power supply • Differential-balanced with RCA jack inputs

** CLOSEOUT!! ** JL Audio A1800

2000W RMS, Class D Monoblock A Series Amplifier

A1800 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

** CLOSEOUT!! ** JL Audio A1800

2000W RMS, Class D Monoblock A Series Amplifier

A Series 1-Channel Class D Car Amplifier • 640W x 1 chan. @ 4 ohm • 1000W x 1 chan. @ 2 ohm • 2000W x 1 chan. Max • MOSFET power supply • Differential-Balanced input Topology for superior noise immunity

6

A Series 1-Channel Class D Car Amplifier • 640W x 1 chan. @ 4 ohm • 1000W x 1 chan. @ 2 ohm • 2000W x 1 chan. Max • MOSFET power supply • Differential-Balanced input Topology for superior noise immunity

JL Audio G1700

700W Max, Monoblock Subwoofer Amplifier

G1700 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio G1700

700W Max, Monoblock Subwoofer Amplifier

JL Audio G-Series Single-Channel Monoblock Class D Car Amplifier • 350W x 1 Chan. @ 4 ohm • 500W x 1 Chan. @ 2 ohm • 700W x 1 Chan. Max • Selectable Bass Boost • Speaker-Level Inputs • LED Indicators • Preamp RCA Outputs

6

JL Audio G-Series Single-Channel Monoblock Class D Car Amplifier • 350W x 1 Chan. @ 4 ohm • 500W x 1 Chan. @ 2 ohm • 700W x 1 Chan. Max • Selectable Bass Boost • Speaker-Level Inputs • LED Indicators • Preamp RCA Outputs

JL Audio J2 250.1 (J2250.1)

250W, Single-Channel Class A/B J2 Series Monoblock Car Amplifier

J2-250.1 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio J2 250.1 (J2250.1)

250W, Single-Channel Class A/B J2 Series Monoblock Car Amplifier

J2 Series Monoblock Class A/B Car Amplifier • 250W RMS • Dual N-Channel MOSFET Output Stage • Speaker-Level Inputs • Preamp RCA Outputs • Dual Speaker Terminals • Variable Low-Pass Filter • Remote Bass Level Control

1

J2 Series Monoblock Class A/B Car Amplifier • 250W RMS • Dual N-Channel MOSFET Output Stage • Speaker-Level Inputs • Preamp RCA Outputs • Dual Speaker Terminals • Variable Low-Pass Filter • Remote Bass Level Control

JL Audio G-MAX

1200W Max, G-Series Class D Monoblock Subwoofer Amplifer

G-MAX big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio G-MAX

1200W Max, G-Series Class D Monoblock Subwoofer Amplifer

G-Series Single-Channel Monoblock Class D Car Amplifier • Power Rating @ 14.4V or 12.5V • 1200W x 1 Chan. 2 ohm • 600W x 1 Chan. @ 4 ohm • Bass Boost • Differential-balanced input topology • Pass-Through Preamps

3

G-Series Single-Channel Monoblock Class D Car Amplifier • Power Rating @ 14.4V or 12.5V • 1200W x 1 Chan. 2 ohm • 600W x 1 Chan. @ 4 ohm • Bass Boost • Differential-balanced input topology • Pass-Through Preamps

JL Audio 1000/1 (BLACK SPECIAL EDITION)

Black Heatsink Design Class D Monoblock Amplifier

1000/1-BLACK big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio 1000/1 (BLACK SPECIAL EDITION)

Black Heatsink Design Class D Monoblock Amplifier

1000 watts, MonoBlock Class D Amplifier

2

1000 watts, MonoBlock Class D Amplifier

JL Audio XD300/1

300W Single-Channel Class D XD Series Subwoofer Monoblock Car Amplifier

XD300/1 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio XD300/1

300W Single-Channel Class D XD Series Subwoofer Monoblock Car Amplifier

• 300W x 1-Chan @ 2 Ohm
• NexD Ultra-High Speed Topology
• Preamp RCA Outputs
• Variable High/Low-Pass Filter
• 3-Way System Protection Circuitry
• Remote Bass Input

5

• 300W x 1-Chan @ 2 Ohm
• NexD Ultra-High Speed Topology
• Preamp RCA Outputs
• Variable High/Low-Pass Filter
• 3-Way System Protection Circuitry
• Remote Bass Input

JL Audio G1300

300W RMS, Class A/B Monoblock G-Series Amplifier

G1300 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio G1300

300W RMS, Class A/B Monoblock G-Series Amplifier

JL Audio Class AB Monoblock G-Series Amplifier • 150 watts x 1 Chan. @ 4 Ohm • 300 watts x 1 Chan. @ 2 Ohm • 600 watts x 1 Chan. Max • MOSFET Power Supply • Selectable Bass Boost • Preamp RCA Outputs

1

JL Audio Class AB Monoblock G-Series Amplifier • 150 watts x 1 Chan. @ 4 Ohm • 300 watts x 1 Chan. @ 2 Ohm • 600 watts x 1 Chan. Max • MOSFET Power Supply • Selectable Bass Boost • Preamp RCA Outputs

JL Audio XD600/1

600W, Single-Channel Class D XD Series Subwoofer Monoblock Car Amplifier

XD600/1 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio XD600/1

600W, Single-Channel Class D XD Series Subwoofer Monoblock Car Amplifier

• 600W x 1-Chan @ 2 Ohm
• NexD Ultra-High Speed Topology
• Preamp RCA Outputs
• Variable High/Low-Pass Filter
• 3-Way System Protection Circuitry
• Remote Bass Input

13

• 600W x 1-Chan @ 2 Ohm
• NexD Ultra-High Speed Topology
• Preamp RCA Outputs
• Variable High/Low-Pass Filter
• 3-Way System Protection Circuitry
• Remote Bass Input

JL Audio A1400

** CLOSEOUT!! ** 500W RMS, Class D Monoblock A Series Amplifier

A1400 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio A1400

** CLOSEOUT!! ** 500W RMS, Class D Monoblock A Series Amplifier

A Series 1-Channel Class D Car Amplifier • 320W x 1 chan. @ 4 ohm • 500W x 1 chan. @ 2 ohm • 1000W x 1 chan. Max • Unregulated MOSFET power supply • High-Damping Class D Circuit with discrete control circuitry • Preamp RCA outputs

2

A Series 1-Channel Class D Car Amplifier • 320W x 1 chan. @ 4 ohm • 500W x 1 chan. @ 2 ohm • 1000W x 1 chan. Max • Unregulated MOSFET power supply • High-Damping Class D Circuit with discrete control circuitry • Preamp RCA outputs

JL Audio Slash 600/1v3 Amplifier + Free High Quality NVX Amp Kit

600W RMS Monoblock Slash v3 Series Class D Car Amplifier

600/1v3, XKIT42 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio Slash 600/1v3 Amplifier + Free High Quality NVX Amp Kit

600W RMS Monoblock Slash v3 Series Class D Car Amplifier

• Peak: 600W x 1 @ 4 ohm, 600W x 1 @ 3 ohm, 600W x 1 @ 2, 600W x 1 @ 1.5 ohm
• Total RMS Power: 600W
• R.I.P.S. Power Supply
• Parametric Bass EQ
• Fully Variable Infrasonic Filter
• Dimensions: 13.40"L x 9.25"W x 2.36"H

130

• Peak: 600W x 1 @ 4 ohm, 600W x 1 @ 3 ohm, 600W x 1 @ 2, 600W x 1 @ 1.5 ohm
• Total RMS Power: 600W
• R.I.P.S. Power Supply
• Parametric Bass EQ
• Fully Variable Infrasonic Filter
• Dimensions: 13.40"L x 9.25"W x 2.36"H

JL Audio 250/1

250 watts, Class D Monoblock Amplifier

250/1 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio 250/1

250 watts, Class D Monoblock Amplifier

250W RMS Monoblock Amplifier

8

250W RMS Monoblock Amplifier

JL Audio HD750/1 Factory Refurbished

(Factory Refurbished) Monoblock Class D, HD Series Small Profile Car Amplifier with R.I.P.S. Technology

HD750/1-RB big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio HD750/1 Factory Refurbished

(Factory Refurbished) Monoblock Class D, HD Series Small Profile Car Amplifier with R.I.P.S. Technology

JL Audio HD Series Monoblock Class D, Small Profile Car Amplifier with R.I.P.S. Technology • 750 watts x 1 Chan. RMS • 750 watts x 1 Chan. Max • MOSFET power supply • Preamp RCA outputs • RCA level inputs • Single Cycle Control™

JL Audio HD Series Monoblock Class D, Small Profile Car Amplifier with R.I.P.S. Technology • 750 watts x 1 Chan. RMS • 750 watts x 1 Chan. Max • MOSFET power supply • Preamp RCA outputs • RCA level inputs • Single Cycle Control™

JL Audio 1000/1

1000 watts, Class D Monoblock Amplifier

1000/1 big DISCONTINUED
Go to item page Right Arrow Icon of Right Arrow

JL Audio 1000/1

1000 watts, Class D Monoblock Amplifier

1000 watts, MonoBlock Class D Amplifier

27

1000 watts, MonoBlock Class D Amplifier

1 2 3 4 5 Next

Items per page: 20 40 60

    Clear all

    JL Audio Monoblock Amplifiers Information

    The JL Audio monoblock amplifiers are designed for efficient power output. These amps take up little space and feature high quality platinum finished connections, and solid power ratings. You won't be disappointed with your JL Audio monoblock amplifier for your vehicle's needs.
    why-shoping-with-sonic

    We love people and we're ready to help you! See what separates us from our competition.

    Take advantage of our VIP rewards like 10% back on your purchases, free 2-day shipping, extended warranties, and free returns! Gain access to all of these rewards without any membership fees.
    Get great discounted (and possibly FREE) installation accessories with most car stereo purchases. This includes dash kits, wiring harnesses and antenna adapters that you will need to properly install your new car stereo.
    We are an Authorized Dealer for all the brands we sell, including the most premium brands in car and marine audio such as Hertz, JL Audio, NVX, Rockford Fosgate, Kicker, Alpine, Kenwood and many more.
    Shop Deals and get up to 30% off premium brands! Shop Now! We are always looking out for the best products and deals to offer our customers. Don’t pay too much by shopping elsewhere!
    We have information on brands, gear, and more for you to explore! Check out our YouTube Channel for helpful how-to videos, product reviews, and Q&As. For a more detailed look, also visit our Learning Center!
    Our trained experts are here to assist you! They are just a phone call or click away to help you get the right gear for you and your vehicle!
    Why Shop With Us?
    Save up to 10 different vehicles in your garage
    Vehicle
    Store     Delete

    2012 Honda Civic

    2009 Scion xD

    2025 Ford Mustang

    2002 Hyundai Accent

    2009 Ford Expedition

    2022 Toyota Corolla

    2016 Mazda MX-5 Miata

    2022 Alfa Romeo Giulia

    2002 Saab 9-3

    1995 Ford F-350

    Add vehicle Clear all vehicles
    Where to find vehicle info
    Are you sure you want to clear your garage?
    This action cannot be undone. Confirm

    Cancel

    This category was not designed for products.
    If you continue, you will be redirected to a category customized for your vehicle. Continue

    Cancel

    Shop your 2012 Civic
    Why Use a Vehicle Fit Guide?
    Change vehicle | Shop without vehicle
    Whoa! Slow down. Add your details below!
    additional information required
    Add vehicle details to confirm fitment
    Ignore fitment details
    Find stereos and more that work -- fast.

    Additional information:

    Remove

    Can't find your vehicle? Click here and we'll help.

    Where to find vehicle info

    Go to Fitment

    Didn't find your car?

    Submit your details and we'll help!
    Please enter the letters as they are shown in the image above. Letters are not case-sensitive.
    Identify your vehicle and submodel details
    • Owner's manual
    • Vehicle's insurance card
    • Vehicle registration
    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
    Car Info Side Door Icon
    Vehicle Registration Icon
    Vehicle Insurance Icon
    Back

    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.

    Back
    Track your order
    Call our experts
    Support Center
    Return & Exchanges
    Follow on Instagram Instagram logo
    Subscribe on YouTube YouTube logo