can you use this with a bass guitar?

Yep. Using it with mine and it tracks fine

Anyone know what is the correct adaptor for this? Is it available from Amazon?

Any standard 9v, centre negative adaptor will work e.g. Boss, ehx etc. This is the most common pedal adaptor and a huge range exists on Amazon. One I use which is reliable is the boss 9v, 500ma. This has enough current output to be able to daisy chain a few pedals from the adaptor

Could this double up as reverb or is it strictly delay?

You could set it for a really short rate for that 'slap back' 50's tone or to thicken your normal tone similar to a reverb pedal I guess but it is way more versatile than that. I bought mine 'cos I wanted to capture a tone similar to Slash on 'Welcome to the Jungle' & Dave Gilmour on 'The Wall' primarily & many gear review sites rated it as the best budget Delay pedal out there. For the money it really is unbeatable & I'm really pleased I bought one. You can dial in so many great tones with it.

Are they nearly as good as boss delay?

quality of sound is as good but no as versatile as a good and lot more expensive boss delay pedal. depends what you want... i only wanted something simple as i don’t use delay very much. good for the money!! good luck!

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Modulation

Product ID: 538166182

Details

Brand
Donner
Colour
Modulation
Item weight
0.25 Kilograms
Product dimensions
9.4L x 4.3W x
Style
Compact

🔇true bypass for pure tone

⏱️tap tempo sync precision

🎛️16 versatile modulation modes

€ 190.38

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Description

🎸 Elevate your soundscape—16 effects, zero limits!

COMPACT DURABLE DESIGN - Lightweight and rugged, built to fit perfectly on any pedalboard and withstand the rigors of the road.
TAP TEMPO FOR PERFECT TIMING - Lock your effects rhythm seamlessly to your groove with intuitive footswitch control.
TRUE BYPASS ENSURES TONE INTEGRITY - Keep your guitar’s natural sound crystal clear when the pedal is off—no signal loss, no compromises.
16 MODULATION MODES AT YOUR FINGERTIPS - From chorus to phaser, explore endless sonic landscapes with one compact pedal.
USER FRIENDLY KNOBS FOR INSTANT CONTROL - Adjust rate, depth, and level effortlessly—ideal for both studio pros and bedroom players.

The Donner Mod Square Ⅱ is a compact, high-quality modulation pedal offering 16 distinct effects including chorus, tremolo, phaser, and more. Featuring true bypass circuitry to preserve your tone, tap tempo for synced effects, and intuitive knob controls, it’s designed for guitarists seeking versatile sound shaping in a durable, pedalboard-friendly package.

Specifications

ASIN	B0C33WC7Q7
Amperage	300 Milliamps
Audio Output Effects	Modulation
Best Sellers Rank	591 in Musical Instruments & DJ ( See Top 100 in Musical Instruments & DJ ) 1 in Delay & Reverb Effects
Brand Name	Donner
Colour	Modulation
Connector Type	1/4" (6.35mm) Audio Jack
Controls Type	Knob
Country of Origin	China
Customer Reviews	3.8 3.8 out of 5 stars (180)
Hardware Interface	HP-HSC
Included Components	Power adapter
Item Dimensions	9.4 x 4.3 x 5.1 centimetres
Item Dimensions L x W x H	9.4L x 4.3W x 5.1H centimetres
Item Weight	0.25 Kilograms
Manufacturer Part Number	B0C33WC7Q7
Model Name	Mod Square Ⅱ
Model Number	EC6644
Number of Items	1
Number of Packs	1
Power Source	Corded Electric
Product Warranty	1 year.
Set Name	Mod Square Ⅱ
Signal Format	Analog
Style	Compact
Unit Count	1 Count
Voltage	9 Volts

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€ 190.38

Duties & taxes included

In stock

Sold byAmazon French GuianaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to French Guiana.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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3 weeks ago

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The product exactly matches the description. Very satisfied with my purchase.

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