Is overdrive, chorus, delay, etc built in?

Yes, there are 40 effects built-in including Noise Gate, Overdrive, Distortion, Delay, Modulation (Chorus, Flanger, Phaser, Tremolo..etc.) and Reverb. You can adjust effects using the control knobs on the amp, or take a deep dive into all of these features and edit your tones in the Spark app that comes free with the Spark amp.

Have you replaced the grounding issues with the power supply not being grounded? I read it causes hum issues

Hum issues can come from many places and 3 prong plug doesn't always get it. Did you try a ground lift? The electrical circuitry in your house (or whatever structure you're in) can cause hum. Florescent lights, f'rinstance. Do you have single coil pickups? find out. That's why Gibson made the "Humbucker". So many issues that wont be resolved with 3 prong plug. I'm looking for a battery powered amp like this. If it was batt powered (self contained) I would buy one and hum wouldn't be an issue (except for maybe single coils under flourescent lamps). Also, your amp may hum if don't know the lyrics.

Is it for bass guitar?

Spark is an amp for bass, electric and acoustic guitar. There are 10,000+ tones and auto chords.

Are the presets built in or do you have to buy them?

Yes, there are factory presets built into the amp itself, plus lots more you can load in from the accompanying free Spark app. You also can find thousands more presets and tones free of charge when you log into Spark ToneCloud.

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Spark Pearl Guitar Amplifier Electric, Bass and Acoustic Guitar 40-Watt Combo Practice Amp with Spark Mobile App (Pearl)

Product ID: 452664878

Details

Brand
Positive Grid
Colour
Pearl
Compatible devices
Guitar
Material
Stainless
Output wattage
40 Watts

🎸40W powerful amp output

📱Real-time chord display via app

🎛️50,000+ amp & FX presets

629921CFA

Duties & taxes included

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🎶 Spark your sound, ignite your vibe — the amp that plays as smart as you do!

MORE THAN AN AMP - Bluetooth streaming and recording capabilities make it your ultimate social and studio companion.
TONE CLOUD UNIVERSE - Access 50,000+ pro-grade amp and effects presets to craft your signature sound anytime.
INSTANT SONG MASTERY - Auto chord display from Spotify, Apple Music & YouTube lets you learn your favorite tracks live.
JAM SMARTER NOT HARDER - AI-driven bass & drum backing that adapts to your unique style for effortless jamming.
SLEEK SOUND MEETS STYLE - Custom speakers & bass-reflex port deliver rich tones in a minimalist pearl-white design.

The Positive Grid Spark Pearl is a 40-watt digital modeling guitar amplifier that combines intelligent AI-driven jamming, real-time chord recognition from popular streaming platforms, and access to over 50,000 amp and effects presets via ToneCloud. Its custom-designed speakers and bass-reflex port deliver rich, authentic tones, while Bluetooth connectivity and recording features make it perfect for practice, social gatherings, and creative exploration.

Specifications

ASIN	B09VBZM2L6
Amplifier Type	Digital Modeling
Audio Output Mode	Mono, Stereo
Brand	Positive Grid
Built-In Media	Spark GO Amplifier, Removable Protective Sleeve, Reversible Duo-Tone Strap, USB-C Cable, Woven Grille, Hardshell Grille, Quick Start Guide
Color	Pearl
Compatible Devices	Guitar
Connector Type	6.35mm Jack, USB
Customer Reviews	4.6 4.6 out of 5 stars (8,168)
Enclosure Material	Stainless Steel
Global Trade Identification Number	00855316004552
Item Dimensions D x W x H	35D x 19W x 18H centimeters
Item Weight	7.08 kg
Manufacturer	Positive Grid
Mfr Part Number	855316004552
Model Name	Spark
Model Number	855316004552
Number of Bands	3
Number of Items	1
Output Channel Quantity	1
Output Wattage	40 Watts
Power Source	Corded Electric
Speaker Size	1 Centimeters
UPC	855316004552
Unit Count	1.0 Count

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