Garage
Shop
Account Icon
Account
Box Icon
Track
order
Telephone Icon
Call
Help Icon
Help
Door with Arrow Icon
Sign In

2006 Lamborghini Murcielago

Change vehicle | Remove vehicle

Single, 1-channel monoblock sub amplifiers for when you add a sub

Overview Upgrade your Speakers Add a Subwoofer Add an Amplifier Digital Sound Processors Audio Installation & Accessories Add a Backup Camera Early Black Friday Sale

Amplifiers for Powering a Sub for 2006 Lamborghini Murcielago

Some vehicles require an amp bypass module, a line-output converter like the NVX XLCA2 or AudioControl LC2i, or a DSP to integrate with your factory radio and avoid bass roll-off. Bass roll-off occurs when a factory radio's crossover is designed only for the original equipment speakers, resulting in a not complete signal being sent to your new aftermarket amp.

Filters
Earthquake Sound ✕
Pioneer ✕
Clear Filters
Reset Done
Product Type
Price Range
Product Fitment Type
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
Availability
filter-icon Filters & Sort

Pioneer GM-DX871

1600W Peak (800W RMS) Class D GM Series Monoblock Car Amplifier with Remote Bass

GM-DX871 big
Go to item page Right Arrow Icon of Right Arrow

Pioneer GM-DX871

1600W Peak (800W RMS) Class D GM Series Monoblock Car Amplifier with Remote Bass

• 300 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• 800 watts x 1 channel @ 1 ohm
• Total RMS Power: 800 watts
• Class D 1 ohm Stable Monoblock Amplifier

FREE Amp Kit at Checkout!
shipping truck icon
FREE shipping to OH. Delivers Nov. 29 - Dec. 6

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

6
Was $320.00 Details
$249.99

Available

Ships in 10-14 days

Add to Cart
See all 5 special offers

Earthquake Sound Mini D2000

2000W Peak (1200W RMS) Class D MiNi Series Monoblock Car Amplifier

Mini D2000 big
Go to item page Right Arrow Icon of Right Arrow

Earthquake Sound Mini D2000

2000W Peak (1200W RMS) Class D MiNi Series Monoblock Car Amplifier

• 650 watts x 1 channel @ 4 ohm
• 1000 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable Monoblock Amplifier

FREE Amp Kit at Checkout! Shop deal
shipping truck icon
FREE shipping to OH. Delivers Nov. 26 - Nov. 28
VIP Star Icon

VIP Product Get $34.60 in rewards to spend later

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

Was $359.00 Details
$345.99

In stock.

Add to Cart

Earthquake Sound PHS3500.1

4000W RMS Class D PowerHouse Shredder Series Monoblock Car Amplifier with Bass Remote

PHS3500.1 big
Go to item page Right Arrow Icon of Right Arrow

Earthquake Sound PHS3500.1

4000W RMS Class D PowerHouse Shredder Series Monoblock Car Amplifier with Bass Remote

• 1700 watts x 1 channel @ 4 ohm
• 2700 watts x 1 channel @ 2 ohm
• 4000 watts x 1 channel @ 1 ohm
• Total RMS Power: 4000 watts
• Class D 1 ohm Stable Monoblock Amplifier

shipping truck icon
FREE shipping to OH. Delivers Nov. 26 - Nov. 28
VIP Star Icon

VIP Product Get $47.90 in rewards to spend later

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

$479.00

In stock.

Add to Cart
See all 6 special offers

Pioneer GM-DX971

2400W Peak (1200W RMS) Class D GM Series Monoblock Car Amplifier with Remote Bass

GM-DX971 big
Go to item page Right Arrow Icon of Right Arrow

Pioneer GM-DX971

2400W Peak (1200W RMS) Class D GM Series Monoblock Car Amplifier with Remote Bass

• 500 watts x 1 channel @ 4 ohm
• 800 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable Monoblock Amplifier

FREE Amp Kit at Checkout!
shipping truck icon
FREE 1-day shipping to OH. Get it Wed, Nov. 19
VIP Star Icon

VIP Product Get $47.00 in rewards to spend later

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

2
Was $480.00 Details
$469.99

In stock

Add to Cart
See all 5 special offers

Earthquake Sound Mini D2500

2500W Peak (2000W RMS) Class D MiNi Series Monoblock Car Amplifier

Mini D2500 big
Go to item page Right Arrow Icon of Right Arrow

Earthquake Sound Mini D2500

2500W Peak (2000W RMS) Class D MiNi Series Monoblock Car Amplifier

• 850 watts x 1 channel @ 4 ohm
• 1800 watts x 1 channel @ 2 ohm
• 2000 watts x 1 channel @ 1 ohm
• Total RMS Power: 2000 watts
• Class D 1 ohm Stable Monoblock Amplifier

shipping truck icon
FREE shipping to OH. Delivers Nov. 26 - Nov. 28
VIP Star Icon

VIP Product Get $42.50 in rewards to spend later

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

5
$425.00

In stock.

Add to Cart
See all 5 special offers

Earthquake Sound Mini D1000

1000W Peak (600W RMS) Class D MiNi Series Monoblock Car Amplifier

Mini D1000 big
Go to item page Right Arrow Icon of Right Arrow

Earthquake Sound Mini D1000

1000W Peak (600W RMS) Class D MiNi Series Monoblock Car Amplifier

• 180 watts x 1 channel @ 4 ohm
• 360 watts x 1 channel @ 2 ohm
• 600 watts x 1 channel @ 1 ohm
• Total RMS Power: 600 watts
• Class D 1 ohm Stable Monoblock Amplifier

FREE Amp Kit at Checkout! Shop deal
shipping truck icon
FREE shipping to OH. Delivers Nov. 26 - Nov. 28
VIP Star Icon

VIP Product Get $22.90 in rewards to spend later

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

4
$229.00

In stock.

Add to Cart

Earthquake Sound PHS5000.1

5500W RMS Class D PowerHouse Shredder Series Monoblock Car Amplifier with Bass Remote

PHS5000.1 big
Go to item page Right Arrow Icon of Right Arrow

Earthquake Sound PHS5000.1

5500W RMS Class D PowerHouse Shredder Series Monoblock Car Amplifier with Bass Remote

• 2000 watts x 1 channel @ 4 ohm
• 3500 watts x 1 channel @ 2 ohm
• 5500 watts x 1 channel @ 1 ohm
• Total RMS Power: 5500 watts
• Class D 1 ohm Stable Monoblock Amplifier

shipping truck icon
FREE shipping to OH. Delivers Nov. 26 - Nov. 28
VIP Star Icon

VIP Product Get $69.90 in rewards to spend later

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

Was $899.00 Details
$699.00

In stock.

Add to Cart
See all 6 special offers

Pioneer GM-D9701

2400W Peak (1200W RMS) GM Series Class-D Monoblock Amplifier with Remote Bass Knob

GM-D9701 big
Go to item page Right Arrow Icon of Right Arrow

Pioneer GM-D9701

2400W Peak (1200W RMS) GM Series Class-D Monoblock Amplifier with Remote Bass Knob

• 500 watts x 1 channel @ 4 ohm
• 800 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable Monoblock Amplifier

shipping truck icon
FREE 1-day shipping to OH. Get it Wed, Nov. 19

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

6
Was $480.00 Details
$419.99

In stock

Add to Cart

• 500 watts x 1 channel @ 4 ohm
• 800 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• Class D 1 ohm Stable Monoblock Amplifier

Pioneer GM-DX971 with Amplifier Wiring Kit

1200W RMS GM Series Class-D Monoblock Car Amplifier with Bass Remote

GM-DX971, BAK42 big
Go to item page Right Arrow Icon of Right Arrow

Pioneer GM-DX971 with Amplifier Wiring Kit

1200W RMS GM Series Class-D Monoblock Car Amplifier with Bass Remote

• 500 watts x 1 channel @ 4 ohm
• 800 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• CEA-2006 Compliant
• Includes Amplifier Wiring Kit
• Class D 1 ohm Stable Monoblock Amplifier

Save 10% Off Package Deals at Checkout!
shipping truck icon
FREE 1-day shipping to OH. Get it Wed, Nov. 19

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

168
Was $539.99 Details
$469.99

In stock

Add to Cart

• 500 watts x 1 channel @ 4 ohm
• 800 watts x 1 channel @ 2 ohm
• 1200 watts x 1 channel @ 1 ohm
• Total RMS Power: 1200 watts
• CEA-2006 Compliant
• Includes Amplifier Wiring Kit
• Class D 1 ohm Stable Monoblock Amplifier

Pioneer GM-D9701 with Amplifier Wiring Kit

1200W RMS Class D Monoblock Amplifier w/ Wired Bass Boost Remote

GM-D9701, XKIT42 big
Go to item page Right Arrow Icon of Right Arrow

Pioneer GM-D9701 with Amplifier Wiring Kit

1200W RMS Class D Monoblock Amplifier w/ Wired Bass Boost Remote

• RMS: 500W x 1 @ 4 ohm, 800W x 1 @ 2 ohm, 1200W x 1 @ 1 ohm
• Total Peak Power: 2400W
• CEA-2006 Compliant
• Variable Bass Boost: 0 to +18 dB
• Class D Circuitry
• Includes Amplifier Wiring Kit

Save 10% Off Package Deals at Checkout!
shipping truck icon
FREE 1-day shipping to OH. Get it Wed, Nov. 19

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

41
Was $707.99 Details
$559.98

In stock

Add to Cart

• RMS: 500W x 1 @ 4 ohm, 800W x 1 @ 2 ohm, 1200W x 1 @ 1 ohm
• Total Peak Power: 2400W
• CEA-2006 Compliant
• Variable Bass Boost: 0 to +18 dB
• Class D Circuitry
• Includes Amplifier Wiring Kit

Pioneer GM-D9701 with Amplifier Wiring Kit

1200W RMS Class D Monoblock Amplifier w/ Wired Bass Boost Remote

GM-D9701, BAK42 big
Go to item page Right Arrow Icon of Right Arrow

Pioneer GM-D9701 with Amplifier Wiring Kit

1200W RMS Class D Monoblock Amplifier w/ Wired Bass Boost Remote

• RMS: 500W x 1 @ 4 ohm, 800W x 1 @ 2 ohm, 1200W x 1 @ 1 ohm
• Total Peak Power: 2400W
• CEA-2006 Compliant
• Variable Bass Boost: 0 to +18 dB
• Class D Circuitry
• Includes Amplifier Wiring Kit
• Dimensions: 12-3/8"W x 7-7/8"D x 2-3/8"H

Save 10% Off Package Deals at Checkout!
shipping truck icon
FREE 1-day shipping to OH. Get it Wed, Nov. 19

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

168
Was $539.99 Details
$469.99

In stock

Add to Cart

• RMS: 500W x 1 @ 4 ohm, 800W x 1 @ 2 ohm, 1200W x 1 @ 1 ohm
• Total Peak Power: 2400W
• CEA-2006 Compliant
• Variable Bass Boost: 0 to +18 dB
• Class D Circuitry
• Includes Amplifier Wiring Kit
• Dimensions: 12-3/8"W x 7-7/8"D x 2-3/8"H

Earthquake Sound PHS3500.1 with NVX 1/0 Gauge Amp Kit

3500W RMS PowerHouse Shredder Series Full Range Class-D Monoblock Amplifier with Bass Remote

PHS35001_XKIT02 big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Earthquake Sound PHS3500.1 with NVX 1/0 Gauge Amp Kit

3500W RMS PowerHouse Shredder Series Full Range Class-D Monoblock Amplifier with Bass Remote

• 1200 watts x 1 channel @ 4 ohm
• 2000 watts x 1 channel @ 2 ohm
• 3500 watts x 1 channel @ 1 ohm
• Total RMS Power: 3500 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Save 10% Off Package Deals at Checkout!

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

39
Was $706.99 Details
$613.99
Add to Cart

• 1200 watts x 1 channel @ 4 ohm
• 2000 watts x 1 channel @ 2 ohm
• 3500 watts x 1 channel @ 1 ohm
• Total RMS Power: 3500 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Earthquake Sound PHS5000.1 with NVX 1/0 Gauge Amp Kit

5500W RMS PowerHouse Shredder Series Full Range Class-D Monoblock Amplifier with Bass Remote

PHS50001_XKIT02 big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Earthquake Sound PHS5000.1 with NVX 1/0 Gauge Amp Kit

5500W RMS PowerHouse Shredder Series Full Range Class-D Monoblock Amplifier with Bass Remote

• 1600 watts x 1 channel @ 4 ohm
• 3500 watts x 1 channel @ 2 ohm
• 5000 watts x 1 channel @ 1 ohm
• Total RMS Power: 5000 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Save 10% Off Package Deals at Checkout!

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

39
Was $1126.99 Details
$699.00
Add to Cart

• 1600 watts x 1 channel @ 4 ohm
• 3500 watts x 1 channel @ 2 ohm
• 5000 watts x 1 channel @ 1 ohm
• Total RMS Power: 5000 watts
• Class D 1 ohm Stable Monoblock Amplifier
• Includes Amplifier Wiring Kit

Earthquake Sound Mini D2000 with NVX 8 Gauge Amp Kit

2000W Max Monoblock MINI D Mono Compact Car Amplifier

MINID2000_XKIT82 big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Earthquake Sound Mini D2000 with NVX 8 Gauge Amp Kit

2000W Max Monoblock MINI D Mono Compact Car Amplifier

• RMS: 650W x 1 @ 4 ohm, 1000W x 1 @ 2 ohm, 1200W x 1 @ 1 ohm
• Total Peak Power: 2000W
• Mini Class D Design
• Bass Boost: 0-12 dB at 50 Hz
• Wired Bass Remote Control Included
• Dimensions: 6-5/16"W x 12-5/16"L x 1-7/8"H
• Includes Amplifier Wiring Kit

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

59
Was $454.99 Details
$345.99
Add to Cart

• RMS: 650W x 1 @ 4 ohm, 1000W x 1 @ 2 ohm, 1200W x 1 @ 1 ohm
• Total Peak Power: 2000W
• Mini Class D Design
• Bass Boost: 0-12 dB at 50 Hz
• Wired Bass Remote Control Included
• Dimensions: 6-5/16"W x 12-5/16"L x 1-7/8"H
• Includes Amplifier Wiring Kit

Pioneer GM-DX871 - New (Damaged Packaging, Product A+)

1600W Peak (800W RMS) GM Series Class-D Monoblock Amplifier with Remote Bass Knob

GM-DX871 big Out of stock
Go to item page Right Arrow Icon of Right Arrow

Pioneer GM-DX871 - New (Damaged Packaging, Product A+)

1600W Peak (800W RMS) GM Series Class-D Monoblock Amplifier with Remote Bass Knob

• 300 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• 800 watts x 1 channel @ 1 ohm
• Total RMS Power: 800 watts
• Class D 1 ohm Stable Monoblock Amplifier

empty

Universal Fitment Icon Universal-fit, works with nearly all vehicles.

6
Was $320.00 Details
$169.99
Notify Me

• 300 watts x 1 channel @ 4 ohm
• 500 watts x 1 channel @ 2 ohm
• 800 watts x 1 channel @ 1 ohm
• Total RMS Power: 800 watts
• Class D 1 ohm Stable Monoblock Amplifier

 
    Clear all
    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?
    FAQ for Monoblock Sub Amplifiers in 2006 Murcielago

    Q: Can I upgrade or change the Monoblock Sub Amplifiers in 2006 Lamborghini Murcielago?

    A: Yes this page includes all the best Monoblock Sub Amplifiers that work in your Murcielago.

    Save up to 10 different vehicles in your garage

    2006 Lamborghini Murcielago

    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 2006 Murcielago
    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
    Track your order
    Call our experts
    Support Center
    Return & Exchanges
    Follow on Instagram Instagram logo
    Subscribe on YouTube YouTube logo