Is it possible to use two sets of outputs - as in run the XLR outputs to the house PA and run the line outs to a keyboard amp so band can monitor?

Yes, the input signal, regardless of connector used, is present on all outputs. http://artproaudio.com/downloads/specsheets/ss_dti.pdf

does it have a ground "lift" option, switchable?

No "BUT" all outputs are ground isolated from the chassis so a "lift" switch is not necessary when using this.

I want to use my studio monitors with my Macbook Pro. What cable do I need to use to plug this into my laptop?

Hi Jason,I would use an 1/8" to XLR Male Y cable like this:http://www.amazon.com/Hosa-CYX-403M-Stereo-Breakout-Cable/dp/B000068OEP/ref=sr_1_9?m=A3QYKZ7LXW9O3&s=merchant-items&ie=UTF8&qid=1448889739&sr=1-9&keywords=hosa+1%2F8+to+xlrIf this was helpful, please consider purchasing from us. We have them both in stock and ready to ship. - Pixel Pro Audio

My single coil pups are picking up interference (nearby laptop, etc) and causing my amp to hum and click; higher gain makes it worse. will this work?

You need a ground loop isolator. Some are as cheap as $20

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ART DTI Dual Transformer Isolator Hum Eliminator

ART DTI Dual Transformer Isolator Hum Eliminator

Product ID: 3498040

Details

Brand
ART
Item Weight
0.34 kg
Mounting Type
Chassis Mount
Power Source
Corded
Specification Met
UL

🔇Passive hum & ground loop isolator

🔌Multi-format balanced/unbalanced I/O

🎚️10Hz-50kHz ultra-wide freq response

€ 132.18

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Description

🎧 Silence the hum, amplify your sound — the ART DTI is your pro audio secret weapon!

ROBUST SIGNAL HANDLING - Handles high signal levels with minimal distortion (THD as low as 0.01%) ensuring clean, neutral sound.
VERSATILE CONNECTIVITY - Seamlessly integrates with XLR, 1/4” TRS, and RCA inputs and outputs for professional-grade flexibility.
ZERO NOISE ALL SIGNAL - Passive transformer isolation eliminates hum and ground-loop noise—no power needed, just pure audio.
BUILT TO LAST PERFORM - Compact chassis mount design with a 1-year warranty—trusted by pros to keep their setups noise-free.
CRYSTAL CLEAR AUDIO FIDELITY - Experience ultra-flat ±0.5dB frequency response from 10Hz to 50kHz for pristine sound clarity.

The ART DTI Dual Transformer Isolator is a passive audio interface designed to eliminate hum and ground-loop noise by isolating input and output grounds via high-performance transformers. It offers an ultra-wide frequency response (10Hz-50kHz ±0.5dB), low distortion, and versatile balanced/unbalanced I/O connections, making it ideal for professional audio setups seeking clean, neutral sound without power requirements.

Specifications

ASIN	B0009GUOQA
Best Sellers Rank	#31,096 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Audio Transformers
Brand Name	ART
Customer Reviews	3.8 3.8 out of 5 stars (301)
Global Trade Identification Number	00840402016380
Item Type Name	ART DTI Dual Transformer Isolator Hum Eliminator
Item Weight	0.34 kg
Manufacturer	ART
Minimum Frequency	10 hertz
Model	DTI
Mounting Type	Chassis Mount
Part Number	DTI
Power Source	Corded Electric
Specification Met	UL
UPC	840402016380
Unit Count	1 Count
Warranty Description	1 year.

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€ 132.18

Duties & taxes included

In stock

Sold byAmazon ItalyDelivered 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 Italy.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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