Radial Engineering Twin-Iso

2-Channel Line Transformer

  • For eliminating ground loops
  • 2x XLR in/out
  • Switchable ground/lift
  • Switchable Polarity Reverse 180°
  • Especially suitable to eliminating sub-mixers

Further Information

Multi-Channel Unit Yes
Active / Passive Passive
19" No
Pad switchable No
Gnd/Lift switchable Yes
Powered by battery No
Speaker Simulation No
9 Customer Ratings:
  • 5
  • 4
  • 3
  • 2
  • 1
4.6 / 5.0
  • features
  • sound
  • quality
3 written ratings Read all reviews
Total
features
sound
quality
Twin Iso. It works.
Christopher2751, 18.12.2014
I was considering buying one of these isolating boxes for quite a while before I finally plucked up the courage to spend the cash. I needed to isolate my balanced audio interface from my unbalanced power amp because I was picking up some awful ground loop buzzing in my speakers.
It's certainly not cheap but like all Radial products the Twin-Iso is built like a tank and could probably be run over by a car or dropped out of a window and it would be fine. All Radial products I've had have been made to the highest standards, and this is no exception.
For a long time the Twin Iso had Jensen transformers inside. Jensen have made arguably the best transformers in the world for decades, and considering Transformer Isolating boxes are basically just transformers in a box, the transformers have a big impact on the sound (in fact the ONLY thing that has an impact on the sound).
Recently Radial bought the Jensen company and then I noticed the Jensen name disappear from the Twin Iso product description. It was hard to get a straight answer about what exactly that meant for the product, but I went ahead and bought one anyway. I was a little aggrieved when I finally bought the Twin Iso to find Radial's own transformer inside rather than the very well respected Jensen isolating JT-11 series transformer, which was previously used in the Twin-Iso.
Now I guess the question is whether there is any difference in sound quality between these 2 transformers.. The Radial Twin Iso DOES sound very good and as a way to isolate two pieces of equipment without changing the sound it works very well indeed and it made my amplifier silent from all buzzes and interferences that had previously plagued my monitoring setup. There is also no noticeable loss in audio quality when it's used. That being said it still feels a bit cheeky to sell a product for the same amount when it previously used 2 world renowned £100 a piece transformers and now it uses their own in-house made transformers that have no track record, history or documented uses.
So although I would have preferred Jensen transformers inside, it is probably doubtful that any difference in sound quality could actually be heard. The specs for the Radial transformers are in fact very good and Radial have actually been making transformers for a few years now so I'm sure the transformers are of the highest quality (they better be for this price!). I still wouldn't hesitate to recommend this product to anyone who cares about sound quality and needs to isolate two pieces of equipment from each other, just don't expect to find Jensen's inside, if that even matters to you.
Helpful · Not helpful · Report
Report rating…

Do you believe this rating to be inaccurate or unacceptable for some reason?

Send report
Total
features
sound
quality
Does what it has to
unLaXo, 13.12.2017
For separating line signal (+4dB)
Passive device
Rugged Precise - you don't even know that you have this in chain.
It does what it has to. Great device if you need it go for it.
Helpful · Not helpful · Report
Report rating…

Do you believe this rating to be inaccurate or unacceptable for some reason?

Send report
299 €
Free shipping incl. VAT
Available immediately
Available immediately

This item is in stock and can be dispatched immediately.

Standard Delivery Times
Share This Product
Your Contacts
Phone: +49-9546-9223-35
FAX: +49-9546-9223-24
Phone: +49-9546-9223-30
FAX: +49-9546-922328
Phone: +49-9546-9223-20
FAX: +49-9546-9223-24
Online Guides
DI Boxes
DI Boxes
While we could go into more and more detail about DI boxes and their inner workings, at some stage it’s best to get some hands-on experience!
Online Guides
Recording E-Guitars
Recording E-Guitars
Our aim is to explain the basic process of recording the electric guitar!
 
 
 
 
 
Download
 
 
 
 
 
test results:
Offers include VAT and are valid as long as stocks last. We do not accept liability for typographical errors or inaccurate information of any kind. *RRP = manufacturer's / distributor's recommended retail price in Germany
(1)
Recently Viewed
Soundbrenner Core

4-in-1 Smart music tool in clock format 4 Functions: Watch, vibrating silent metronome, magnetic tuner and decibel meter, You always have your tools with you, whether you're practicing at home, recording in the studio or even performing on stage.,...

(1)
Recently Viewed
Rode VideoMic NTG

Rode VideoMic NTG; On-Camera Shotgun Microphone; Highly directional supercardioid polar pattern; Convenient cold shoe mounting on camera; Frequency response: 35 Hz – 20 kHz (±3 dB); High sensitivity: 50 mV, SPL: 120 dB; Peak warning light; -20 dB Pad switch;...

(1)
Recently Viewed
Modal Argon8

Wavetable Synthesizer 8-Voice polyphonic, 37-Key keyboard with velocity (FATAR TP9/S) with aftertouch, 120 Wavetables divided into 24 banks of 5 morphable waveform sets, 28 Static wavetable processors, 32 Wavetable oscillators, 4 per voice, with 8 types including: Phase Mod...

(1)
Recently Viewed
Mooer GE 250

Mooer GE 250 Amp modelling & Multi Effects, multi-effects pedal, 70 high-quality amp models from the Micro Preamp series, 32 different default cabinet simulations (IRs), supports 3rd party impulse responses (IRs, 2048 pts.) in 10 free user presets, 60 drum...

(4)
Recently Viewed
Harley Benton Dullahan-AT TBK

Headless Electric Guitar Ergonomically shaped, Body: Mahogany, Top: Flamed maple, Neck: Maple, Neck attachment: Bolt-on, Fretboard: Ebony, Fretboard inlays: Pearloid offset dots, Frets: 22 Stainless steel jumbo, Neck profile: Modern C, Nut: Graph Tech TUSQ XL, Nut width: 42...

Recently Viewed
Varytec Colors SonicStrobe

Varytec Colors SonicStrobe; LED stroboscope with ambient effect; Over 200 SMD 5730 LEDs provide bright and dynamic strobe and blinder effects; In addition, more than 140 SMD5050 RGB LEDs provide color accents in the background; special surface of the reflectors...

Recently Viewed
Varytec Colors StarBar 12

LED Bar With 12 warm white beam LEDs and 12 RGB segments, Ideal as an eye catcher on the stage and in discos, Light and robust construction, Subdued grey soft frost cover Technical Data: Light source:...

(2)
Recently Viewed
Toontrack EZX Kicks & Snares

Toontrack EZX Kicks & Snares (ESD); expansion pack for Toontrack EZ Drummer 2 (item 399369) / Superior Drummer 3 (item 419735); in 8 different studios detailed recorded kicks and snares, suitable for a lot of different musical styles; contains 43...

Recently Viewed
Tascam BD-MP1

Tascam BD-MP1; Blu-ray / Media Player; supported Media: BD25, BD50, BD-ROM, BD-R, BD-RE, DVD, DVD+R, DVD-R, DVD+RW, DVD-RW, CD, CD-R, CD-RW, SD cards (up to 128 GB) and USB flash media; NTSC/PAL conversion; BD-Live function; HDMI high-definition audio/video out with...

Recently Viewed
Thon Controller Case Pioneer XDJ-XZ

Thon Controller Case with cabel space for Pioneer XDJ-XZ, built with 7 mm birch plywood, black color, 22x22 mm aluminium profile, 4 x butterfly catches, 3 x case handle, 8 x steel castor, 4 x rubber feet, conection are free,...

Recently Viewed
Walrus Audio MAKO D1

Walrus Audio MAKO D1; effect pedal; Digital Stereo Delay Pedal; For live and studio applications; Stereo input and output; 5 delay programs: Digital, Mod, Vintage, Dual, Reverse; "Digital": transparent delay e.g. for rhythm guitar; "Mod": random pitch modulation of the...

(1)
Recently Viewed
Epiphone Les Paul Custom Ebony

Electric Guitar Body: Mahogany, 5-Way body binding, Neck: Mahogany, Fretboard: Ebony, Pearloid Block fretboard inlays, Neck profile: SlimTaper, Scale: 629 mm (24.75"), Nut width: 43 mm (1.693"), 22 Frets, Pickups: ProBucker 2 (neck) and ProBucker 3 (bridge) humbuckers, 2...

Give Feedback
Feedback Found an error or want to give us feedback about this page?

We're looking forward to hearing from you and aim to solve any problems as soon as we can.